Arunima Nayak | Graphic Era University (original) (raw)

Papers by Arunima Nayak

Research paper thumbnail of Removal of emergent pollutants: A review on recent updates and future perspectives on polysaccharide-based composites vis-à-vis traditional adsorbents

International Journal of Biological Macromolecules, Jan 31, 2024

Research paper thumbnail of Principles and Advantages of Microwave-Assisted Methods for the Synthesis of Nanomaterials for Water Purification

IGI Global eBooks, 2021

Nanomaterials are the pillars of nanoscience and nanotechnology and to realize their full potenti... more Nanomaterials are the pillars of nanoscience and nanotechnology and to realize their full potential in various potential applications, synthetic methodologies/routes need to be established that are simple, fast and cost-effective. Wet-chemical approaches for nanomaterial synthesis have proven to be among the most versatile and effective routes to finely tailor nanocrystals with varying compositional and architectural complexity. Microwave-assisted solution route represents an efficient wet-chemical approach for the synthesis of nanomaterials that offers additional advantages, such as rapid volumetric heating, high reaction rates, size and shape control by tuning reaction parameters, and energy efficiency. In addition, the homogenous heating of the reactants in microwave synthesis minimizes thermal gradients and provides uniform nucleation and growth conditions that leads to the formation of nanomaterials with uniform size distribution. This chapter deals with the basics of microwave chemistry and its applications towards the synthesis of nanomaterials for catalytic applications.

Research paper thumbnail of Development of Low Cost Adsorbents for Waste Water Treatment

Research paper thumbnail of Phytoremediation of Heavy Metal- Contaminated Tailings Soil by Symbiotic Interaction of <i>Cymbopogon Citratus</i> and <i>Solanum Torvum</i> with <i>Bacillus Cereus</i> T1B3

Soil and Sediment Contamination: An International Journal, Jun 28, 2019

ABSTRACT Environmental pollution by dumping of tailings and overburden from different industrial ... more ABSTRACT Environmental pollution by dumping of tailings and overburden from different industrial activities has become a critical issue due to considerable increase in heavy metals (HMs) in all compartments of environment, especially in soils. Phytoremediation shows potential for remediating mine tailing sites contaminated with HMs. The aim of the present study was to isolate, characterize, and assess the native potential HM-resistant bacteria to enhance growth and metal accumulation of Solanum torvum and Cymbopogon citratus. In this study, a pot experiment was conducted to evaluate the effect of native Bacillus cereus T1B3 strain, which can produce plant growth-promoting traits including 1-aminocyclopropane-1-carboxylate deaminase (ACC), Indole Acetic Acid (IAA), Siderophores production, Nitrogen fixation, and Phosphate solubilization on the growth and metal uptake of S. torvum and C. citratus growing in multi-metal-contaminated soil. Inoculating tailings with T1B3 strain significantly increased biomass, photosynthetic pigment content, enzymes and HMs (Cr (VI), Fe, Mn, Cu, Cd, Ni and Zn) accumulation in both plants. Based on translocation and biococentration factors, both plants acted as a potential phytostabilizer of HMs in roots. Results indicate that inoculating of native B. cereus T1B3 strain with S. torvum and C. citratus improves its efficiency for phytoremediation of soil containing mine tailings contaminated with HMs.

Research paper thumbnail of Enhancement of toxic Cr (VI), Fe, and other heavy metals phytoremediation by the synergistic combination of native <i>Bacillus cereus</i> strain and <i>Vetiveria zizanioides</i> L

International Journal of Phytoremediation, May 3, 2018

Research paper thumbnail of Biogenic magnetic nanocomposite of hydroxyapatite and dextran: synthesis, characterization, and enhanced removal of 2,4-D from aqueous environment

Environmental science and pollution research international, May 30, 2024

Research paper thumbnail of Adsorption–desorption studies of indigocarmine from industrial effluents by using deoiled mustard and its comparison with charcoal

Journal of Colloid and Interface Science, Aug 1, 2010

Deoiled mustard obtained from local oil mills has been used as an inexpensive and effective adsor... more Deoiled mustard obtained from local oil mills has been used as an inexpensive and effective adsorbent for the removal of indigocarmine dye from industrial effluents. The influence of various factors on the adsorption capacity has been studied by batch experiments. The adsorption studies validate both Langmuir and Freundlich adsorption isotherms. Thermodynamic parameters such as DeltaG degrees, DeltaH degrees, and DeltaS degrees for the adsorption process were calculated, which indicated the feasibility of the adsorption process. Desorption profiles revealed that a significant portion (85%) could be desorbed from deoiled mustard by using 30% glycerol as eluting agent.

Research paper thumbnail of Performance evaluation and application of oxygen enriched waste rubber tire adsorbent for the removal of hazardous aniline derivatives from waste water

Chemical Engineering Journal, Sep 1, 2012

ABSTRACT Liquid-phase adsorption of aniline, p-Cl-aniline, p-toluidine and p-anisidine onto rubbe... more ABSTRACT Liquid-phase adsorption of aniline, p-Cl-aniline, p-toluidine and p-anisidine onto rubber tire activated carbons with different textural and surface chemistry was conducted to explore not only the influence of the surface chemical characteristics on the adsorption capacity but also in designing and analyzing the specific studied system for waste water treatment. Rubber tire activated carbons having high surface area and favorable textural properties with oxygen enriched functional groups (RTACox) and without (RTAC) were developed and their adsorption capacity compared with a purely microporous commercial carbon. The pore structure and the adsorbate size played an influencing role in the adsorption of RTAC and CAC, the trend followed being: aniline &gt; p-toluidine &gt; p-anisidine &gt; p-chloro aniline. Superior performance of RTACox was attributed to the oxygen functional groups along with larger mesopore volume. Uptake trend of p-anisidine &gt; p-toluidine &gt; aniline &gt; p-chloro aniline by RTACox correlated well with the basicity of the studied adsorbates. Such results were corroborated by the batch equilibrium and thermodynamic studies. Column experiments with real waste water established the practicality of the developed system. The regeneration and reuse without significant loss in efficiency showed an important criterion of advanced adsorbent in RTACox for waste water treatment.

Research paper thumbnail of Adsorption studies on the removal of hexavalent chromium from aqueous solution using a low cost fertilizer industry waste material

Journal of Colloid and Interface Science, Feb 1, 2010

studies on the removal of hexavalent chromium from aqueous solution using a low cost fertilizer i... more studies on the removal of hexavalent chromium from aqueous solution using a low cost fertilizer industry waste material,

Research paper thumbnail of High-performance liquid chromatography method for estimating piperine in herbal tea

Nucleation and Atmospheric Aerosols, 2022

Research paper thumbnail of Wetland Ecosystems and Their Relevance to the Environment

IGI Global eBooks, 2022

As compared to the tropical evergreen forest, wetlands are also one of the most productive ecosys... more As compared to the tropical evergreen forest, wetlands are also one of the most productive ecosystems in the biosphere and make a major contribution to the ecological sustainability of a region. The wetlands maintain biologically diverse communities having both ecological and economic value. Based on the immense environmental and sustainability benefits, wetlands have been demarcated as essential for the future of human existence. The future challenges pertaining to food, clean water and energy security, well-being of humans, natural disaster risk reduction, and climate change resilience can be met by preserving the wetlands. The chapter has an aim to provide insight on the fundamentals like the classifications, major functions, as well as the various factors affecting the wetland ecosystem. Other important aspects like the major threats leading to the loss of the wetlands, consequences of the loss or degradation of wetlands, and ways to preserve the wetlands are discussed.

Research paper thumbnail of Nano-Bioremediation Technologies for Potential Application in Soil Reclamation

IGI Global eBooks, 2021

Rapid industrialization, urbanization, and use of modern agricultural practices have resulted in ... more Rapid industrialization, urbanization, and use of modern agricultural practices have resulted in the rise in pollutant levels in soil. In this context, nano-bioremediation has emerged as a new tool for controlling soil pollution by the application of nanomaterials with subsequent use of bioremediation. Due to its cost-effectiveness, eco-friendliness, and sustainability, the use of bioremediation in soil reclamation has rapidly gained prominence. Nanomaterials have helped in remediating toxic soil environments, thereby improving microbial activity and bioremediation efficiency. The overall time as well as costs are greatly reduced. The major limitation of this technology is its longer treatment time and its ineffectiveness for a wide range of pollutants. The chapter has an aim to present an overview of the recent advances and applications in the field of nano-bioremediation of various polluted areas of the environment. Different classes of nanomaterials along with their properties as well as application towards removal of soil pollutants will be addressed.

Research paper thumbnail of Nanomaterials for Energy Harvesting and Storage

Advances in chemical and materials engineering book series, 2021

The possibility of both energy and environmental crisis that may arise due to use of fossil fuels... more The possibility of both energy and environmental crisis that may arise due to use of fossil fuels has resulted in intense research activities in the past decade on the development of technologies for harvesting and storage of energy from renewable sources. In order to meet the energy requirements for an ever-increasing population, there is a need for high performance electrochemical energy harvesting as well as storage devices. Nanomaterials and nanocomposites with diverse composition, structure, and morphologies have been applied in various energy related applications ranging from photocatalytic hydrogen generation, solar electricity generation, electric energy storage by lithium ion batteries and supercapacitors, hydrogen storage systems, etc. The aim of this chapter is to provide an overview of the recent developments in the technological advancements brought about by the use of nanotechnology in energy harvesting and storage appliances with specific focus on dye sensitized solar cells for electricity generation, lithium ion batteries, and supercapacitors for energy storage.

Research paper thumbnail of Principles and Advantages of Microwave-Assisted Methods for the Synthesis of Nanomaterials for Water Purification

Advances in environmental engineering and green technologies book series, Jan 30, 2017

Nanomaterials are the pillars of nanoscience and nanotechnology and to realize their full potenti... more Nanomaterials are the pillars of nanoscience and nanotechnology and to realize their full potential in various potential applications, synthetic methodologies/routes need to be established that are simple, fast and cost-effective. Wet-chemical approaches for nanomaterial synthesis have proven to be among the most versatile and effective routes to finely tailor nanocrystals with varying compositional and architectural complexity. Microwave-assisted solution route represents an efficient wet-chemical

Research paper thumbnail of An overview of the recent trends on the waste valorization techniques for food wastes

Journal of Environmental Management, Mar 1, 2019

A critical and up-to-date review has been conducted on the latest individual valorization technol... more A critical and up-to-date review has been conducted on the latest individual valorization technologies aimed at the generation of value-added by-products from food wastes in the form of bio-fuels, bio-materials, value added components and bio-based adsorbents. The aim is to examine the associated advantages and drawbacks of each technique separately along with the assessment of process parameters affecting the efficiency of the generation of the bio-based products. Challenges faced during the processing of the wastes to each of the bio-products have been explained and future scopes stated. Among the many hurdles encountered in the successful and high yield generation of the bio-products is the complexity and variability in the composition of the food wastes along with the high inherent moisture content. Also, individual technologies have their own process configurations and operating parameters which may affect the yield and composition of the desired end product. All these require extensive study of the composition of the food wastes followed by their effective pre-treatments, judicial selection of the technological parameters and finally optimization of not only the process configurations but also in relation to the input food waste material. Attempt has also been made to address the hurdles faced during the implementation of such technologies on an industrial scale. wastes have been highlighted by the United States Environmental Protection Agency (www.epa.gov) and the United States Department of Agriculture (www.usda.gov) (Arvanitoyannins, 2008; Murugan et al., 2013). The recycling of food wastes to produce commercial products and energy is known as the bio-refinery concept and is fast picking up in the scientific community as a sustainable option (Fig. 1). The bio-refinery products like bio-fuels, biomass, bio-fertilizers and secondary chemicals are obtained from the biotechnological transformation of such wastes via anaerobic digestion, fermentation and composting technologies (Schieber et al., 2001; Sonja et al., 2009). Agro-food wastes have also been successfully developed into effective bio-based adsorbents which have been used for the bio-remediation of diverse types of pollutants from wastewaters. Recovery of high value-added components and their re-utilization as food additives, therapeutics etc. is another aspect of the bio-refinery concept (Han and Shin, 2004;

Research paper thumbnail of Production of Energy from Biowaste: An Overview of the Underlying Biological Technologies

River Publishers eBooks, Mar 8, 2023

Research paper thumbnail of Application of Green Nanomaterials for Sustainable Energy Systems: A Review of the Current Status

River Publishers eBooks, Mar 8, 2023

Research paper thumbnail of Recovery of polyphenols onto porous carbons developed from exhausted grape pomace: A sustainable approach for the treatment of wine wastewaters

Water Research, Nov 1, 2018

Removal of total polyphenols (TPP) is not only necessary as a pretreatment stepfor anaerobic dige... more Removal of total polyphenols (TPP) is not only necessary as a pretreatment stepfor anaerobic digestion of wine wastewaters (WWW) but also the recovered polyphenols can be used as a dietary supplement. With a view to make the process sustainable, eco-efficient and cost effective, exhausted grape pomace (EGP) after the extraction of polyphenols was impregnated with ZnCl (1:1.5) and further activated at 450°C for hr under inert atmosphere. The GPAC (grape pomace activated carbon) thus developed exhibited welldeveloped porosity with a predominance of micropores, high surface area and selective surface binding sites. Batch adsorption conducted on diluted WWW revealed the better performance of GPAC (84.3% removal) as compared to EGP (48.5% removal) under similar conditions; with maximum adsorption taking place at pH 3.8.While pH studies indicated a possible electron-donor-acceptor mechanism in the binding of TPP, kinetic studies indicated that diffusion was mediated by the porosity in GPAC. Isotherm studies conducted on GPAC and commercial carbon (CAC) revealed multilayer binding under WWW while Langmuir model was operative under simulated conditions. Contrary to the better performance of CAC, the same for GPAC was comparable at higher dosage where >80%TPP was removed from undiluted WWW. The phenol adsorption capacity of GPAC from real (28.4 mg/g) and from simulated wastewater (142.6 mg/g) was higher as compared to other reported adsorbents. Desorption of TPP from loaded GPAC was maximum (∼91%) with 1:1 ethanol-water solvent.The results reveal a sustainable eco-friendly solution for valorisation of exhausted grape pomace for recovery of polyphenols from wine wastewater.

Research paper thumbnail of Valorisation potential of Cabernet grape pomace for the recovery of polyphenols: Process intensification, optimisation and study of kinetics

Food and Bioproducts Processing, May 1, 2018

Highlights  High bioactive components reveals valorisation potential of the Cabernet pomace  yi... more Highlights  High bioactive components reveals valorisation potential of the Cabernet pomace  yield of polyphenols has a direct correlation on the extraction conditions  Ultrasound as a standalone is insufficient in enhancing yield of polyphenols  ultrasound with shaking involves low energy, accelerated and intensified polyphenols  Results reveal sustainable polyphenols extraction from grape pomace

Research paper thumbnail of Polyphenols removal in winery wastewater using an AnSBR

The aim of this work was to study along of different cycles the biomass adaptation process to tot... more The aim of this work was to study along of different cycles the biomass adaptation process to total polyphenols (TPP) concentrations in an Anaerobic Sequencing Batch Reactor (AnSBR) and to evaluate the degradation of TPP and COD in winery wastewater (WWW). A lab-scale AnSBR was operated at 30º C with intermittent stirring and was fed with WWW with a COD of 182.25 g/l and a TPP concentration of 489 mg/l. The AnSBR was operated in four cycles, after the first cycle the biomass adaptation was taken for granted since reductions in the TPP went from 56% in C1 to around 95% in the consecutive cycles. COD reduction reached the 95% to 99% for all the four cycles.

Research paper thumbnail of Removal of emergent pollutants: A review on recent updates and future perspectives on polysaccharide-based composites vis-à-vis traditional adsorbents

International Journal of Biological Macromolecules, Jan 31, 2024

Research paper thumbnail of Principles and Advantages of Microwave-Assisted Methods for the Synthesis of Nanomaterials for Water Purification

IGI Global eBooks, 2021

Nanomaterials are the pillars of nanoscience and nanotechnology and to realize their full potenti... more Nanomaterials are the pillars of nanoscience and nanotechnology and to realize their full potential in various potential applications, synthetic methodologies/routes need to be established that are simple, fast and cost-effective. Wet-chemical approaches for nanomaterial synthesis have proven to be among the most versatile and effective routes to finely tailor nanocrystals with varying compositional and architectural complexity. Microwave-assisted solution route represents an efficient wet-chemical approach for the synthesis of nanomaterials that offers additional advantages, such as rapid volumetric heating, high reaction rates, size and shape control by tuning reaction parameters, and energy efficiency. In addition, the homogenous heating of the reactants in microwave synthesis minimizes thermal gradients and provides uniform nucleation and growth conditions that leads to the formation of nanomaterials with uniform size distribution. This chapter deals with the basics of microwave chemistry and its applications towards the synthesis of nanomaterials for catalytic applications.

Research paper thumbnail of Development of Low Cost Adsorbents for Waste Water Treatment

Research paper thumbnail of Phytoremediation of Heavy Metal- Contaminated Tailings Soil by Symbiotic Interaction of <i>Cymbopogon Citratus</i> and <i>Solanum Torvum</i> with <i>Bacillus Cereus</i> T1B3

Soil and Sediment Contamination: An International Journal, Jun 28, 2019

ABSTRACT Environmental pollution by dumping of tailings and overburden from different industrial ... more ABSTRACT Environmental pollution by dumping of tailings and overburden from different industrial activities has become a critical issue due to considerable increase in heavy metals (HMs) in all compartments of environment, especially in soils. Phytoremediation shows potential for remediating mine tailing sites contaminated with HMs. The aim of the present study was to isolate, characterize, and assess the native potential HM-resistant bacteria to enhance growth and metal accumulation of Solanum torvum and Cymbopogon citratus. In this study, a pot experiment was conducted to evaluate the effect of native Bacillus cereus T1B3 strain, which can produce plant growth-promoting traits including 1-aminocyclopropane-1-carboxylate deaminase (ACC), Indole Acetic Acid (IAA), Siderophores production, Nitrogen fixation, and Phosphate solubilization on the growth and metal uptake of S. torvum and C. citratus growing in multi-metal-contaminated soil. Inoculating tailings with T1B3 strain significantly increased biomass, photosynthetic pigment content, enzymes and HMs (Cr (VI), Fe, Mn, Cu, Cd, Ni and Zn) accumulation in both plants. Based on translocation and biococentration factors, both plants acted as a potential phytostabilizer of HMs in roots. Results indicate that inoculating of native B. cereus T1B3 strain with S. torvum and C. citratus improves its efficiency for phytoremediation of soil containing mine tailings contaminated with HMs.

Research paper thumbnail of Enhancement of toxic Cr (VI), Fe, and other heavy metals phytoremediation by the synergistic combination of native <i>Bacillus cereus</i> strain and <i>Vetiveria zizanioides</i> L

International Journal of Phytoremediation, May 3, 2018

Research paper thumbnail of Biogenic magnetic nanocomposite of hydroxyapatite and dextran: synthesis, characterization, and enhanced removal of 2,4-D from aqueous environment

Environmental science and pollution research international, May 30, 2024

Research paper thumbnail of Adsorption–desorption studies of indigocarmine from industrial effluents by using deoiled mustard and its comparison with charcoal

Journal of Colloid and Interface Science, Aug 1, 2010

Deoiled mustard obtained from local oil mills has been used as an inexpensive and effective adsor... more Deoiled mustard obtained from local oil mills has been used as an inexpensive and effective adsorbent for the removal of indigocarmine dye from industrial effluents. The influence of various factors on the adsorption capacity has been studied by batch experiments. The adsorption studies validate both Langmuir and Freundlich adsorption isotherms. Thermodynamic parameters such as DeltaG degrees, DeltaH degrees, and DeltaS degrees for the adsorption process were calculated, which indicated the feasibility of the adsorption process. Desorption profiles revealed that a significant portion (85%) could be desorbed from deoiled mustard by using 30% glycerol as eluting agent.

Research paper thumbnail of Performance evaluation and application of oxygen enriched waste rubber tire adsorbent for the removal of hazardous aniline derivatives from waste water

Chemical Engineering Journal, Sep 1, 2012

ABSTRACT Liquid-phase adsorption of aniline, p-Cl-aniline, p-toluidine and p-anisidine onto rubbe... more ABSTRACT Liquid-phase adsorption of aniline, p-Cl-aniline, p-toluidine and p-anisidine onto rubber tire activated carbons with different textural and surface chemistry was conducted to explore not only the influence of the surface chemical characteristics on the adsorption capacity but also in designing and analyzing the specific studied system for waste water treatment. Rubber tire activated carbons having high surface area and favorable textural properties with oxygen enriched functional groups (RTACox) and without (RTAC) were developed and their adsorption capacity compared with a purely microporous commercial carbon. The pore structure and the adsorbate size played an influencing role in the adsorption of RTAC and CAC, the trend followed being: aniline &gt; p-toluidine &gt; p-anisidine &gt; p-chloro aniline. Superior performance of RTACox was attributed to the oxygen functional groups along with larger mesopore volume. Uptake trend of p-anisidine &gt; p-toluidine &gt; aniline &gt; p-chloro aniline by RTACox correlated well with the basicity of the studied adsorbates. Such results were corroborated by the batch equilibrium and thermodynamic studies. Column experiments with real waste water established the practicality of the developed system. The regeneration and reuse without significant loss in efficiency showed an important criterion of advanced adsorbent in RTACox for waste water treatment.

Research paper thumbnail of Adsorption studies on the removal of hexavalent chromium from aqueous solution using a low cost fertilizer industry waste material

Journal of Colloid and Interface Science, Feb 1, 2010

studies on the removal of hexavalent chromium from aqueous solution using a low cost fertilizer i... more studies on the removal of hexavalent chromium from aqueous solution using a low cost fertilizer industry waste material,

Research paper thumbnail of High-performance liquid chromatography method for estimating piperine in herbal tea

Nucleation and Atmospheric Aerosols, 2022

Research paper thumbnail of Wetland Ecosystems and Their Relevance to the Environment

IGI Global eBooks, 2022

As compared to the tropical evergreen forest, wetlands are also one of the most productive ecosys... more As compared to the tropical evergreen forest, wetlands are also one of the most productive ecosystems in the biosphere and make a major contribution to the ecological sustainability of a region. The wetlands maintain biologically diverse communities having both ecological and economic value. Based on the immense environmental and sustainability benefits, wetlands have been demarcated as essential for the future of human existence. The future challenges pertaining to food, clean water and energy security, well-being of humans, natural disaster risk reduction, and climate change resilience can be met by preserving the wetlands. The chapter has an aim to provide insight on the fundamentals like the classifications, major functions, as well as the various factors affecting the wetland ecosystem. Other important aspects like the major threats leading to the loss of the wetlands, consequences of the loss or degradation of wetlands, and ways to preserve the wetlands are discussed.

Research paper thumbnail of Nano-Bioremediation Technologies for Potential Application in Soil Reclamation

IGI Global eBooks, 2021

Rapid industrialization, urbanization, and use of modern agricultural practices have resulted in ... more Rapid industrialization, urbanization, and use of modern agricultural practices have resulted in the rise in pollutant levels in soil. In this context, nano-bioremediation has emerged as a new tool for controlling soil pollution by the application of nanomaterials with subsequent use of bioremediation. Due to its cost-effectiveness, eco-friendliness, and sustainability, the use of bioremediation in soil reclamation has rapidly gained prominence. Nanomaterials have helped in remediating toxic soil environments, thereby improving microbial activity and bioremediation efficiency. The overall time as well as costs are greatly reduced. The major limitation of this technology is its longer treatment time and its ineffectiveness for a wide range of pollutants. The chapter has an aim to present an overview of the recent advances and applications in the field of nano-bioremediation of various polluted areas of the environment. Different classes of nanomaterials along with their properties as well as application towards removal of soil pollutants will be addressed.

Research paper thumbnail of Nanomaterials for Energy Harvesting and Storage

Advances in chemical and materials engineering book series, 2021

The possibility of both energy and environmental crisis that may arise due to use of fossil fuels... more The possibility of both energy and environmental crisis that may arise due to use of fossil fuels has resulted in intense research activities in the past decade on the development of technologies for harvesting and storage of energy from renewable sources. In order to meet the energy requirements for an ever-increasing population, there is a need for high performance electrochemical energy harvesting as well as storage devices. Nanomaterials and nanocomposites with diverse composition, structure, and morphologies have been applied in various energy related applications ranging from photocatalytic hydrogen generation, solar electricity generation, electric energy storage by lithium ion batteries and supercapacitors, hydrogen storage systems, etc. The aim of this chapter is to provide an overview of the recent developments in the technological advancements brought about by the use of nanotechnology in energy harvesting and storage appliances with specific focus on dye sensitized solar cells for electricity generation, lithium ion batteries, and supercapacitors for energy storage.

Research paper thumbnail of Principles and Advantages of Microwave-Assisted Methods for the Synthesis of Nanomaterials for Water Purification

Advances in environmental engineering and green technologies book series, Jan 30, 2017

Nanomaterials are the pillars of nanoscience and nanotechnology and to realize their full potenti... more Nanomaterials are the pillars of nanoscience and nanotechnology and to realize their full potential in various potential applications, synthetic methodologies/routes need to be established that are simple, fast and cost-effective. Wet-chemical approaches for nanomaterial synthesis have proven to be among the most versatile and effective routes to finely tailor nanocrystals with varying compositional and architectural complexity. Microwave-assisted solution route represents an efficient wet-chemical

Research paper thumbnail of An overview of the recent trends on the waste valorization techniques for food wastes

Journal of Environmental Management, Mar 1, 2019

A critical and up-to-date review has been conducted on the latest individual valorization technol... more A critical and up-to-date review has been conducted on the latest individual valorization technologies aimed at the generation of value-added by-products from food wastes in the form of bio-fuels, bio-materials, value added components and bio-based adsorbents. The aim is to examine the associated advantages and drawbacks of each technique separately along with the assessment of process parameters affecting the efficiency of the generation of the bio-based products. Challenges faced during the processing of the wastes to each of the bio-products have been explained and future scopes stated. Among the many hurdles encountered in the successful and high yield generation of the bio-products is the complexity and variability in the composition of the food wastes along with the high inherent moisture content. Also, individual technologies have their own process configurations and operating parameters which may affect the yield and composition of the desired end product. All these require extensive study of the composition of the food wastes followed by their effective pre-treatments, judicial selection of the technological parameters and finally optimization of not only the process configurations but also in relation to the input food waste material. Attempt has also been made to address the hurdles faced during the implementation of such technologies on an industrial scale. wastes have been highlighted by the United States Environmental Protection Agency (www.epa.gov) and the United States Department of Agriculture (www.usda.gov) (Arvanitoyannins, 2008; Murugan et al., 2013). The recycling of food wastes to produce commercial products and energy is known as the bio-refinery concept and is fast picking up in the scientific community as a sustainable option (Fig. 1). The bio-refinery products like bio-fuels, biomass, bio-fertilizers and secondary chemicals are obtained from the biotechnological transformation of such wastes via anaerobic digestion, fermentation and composting technologies (Schieber et al., 2001; Sonja et al., 2009). Agro-food wastes have also been successfully developed into effective bio-based adsorbents which have been used for the bio-remediation of diverse types of pollutants from wastewaters. Recovery of high value-added components and their re-utilization as food additives, therapeutics etc. is another aspect of the bio-refinery concept (Han and Shin, 2004;

Research paper thumbnail of Production of Energy from Biowaste: An Overview of the Underlying Biological Technologies

River Publishers eBooks, Mar 8, 2023

Research paper thumbnail of Application of Green Nanomaterials for Sustainable Energy Systems: A Review of the Current Status

River Publishers eBooks, Mar 8, 2023

Research paper thumbnail of Recovery of polyphenols onto porous carbons developed from exhausted grape pomace: A sustainable approach for the treatment of wine wastewaters

Water Research, Nov 1, 2018

Removal of total polyphenols (TPP) is not only necessary as a pretreatment stepfor anaerobic dige... more Removal of total polyphenols (TPP) is not only necessary as a pretreatment stepfor anaerobic digestion of wine wastewaters (WWW) but also the recovered polyphenols can be used as a dietary supplement. With a view to make the process sustainable, eco-efficient and cost effective, exhausted grape pomace (EGP) after the extraction of polyphenols was impregnated with ZnCl (1:1.5) and further activated at 450°C for hr under inert atmosphere. The GPAC (grape pomace activated carbon) thus developed exhibited welldeveloped porosity with a predominance of micropores, high surface area and selective surface binding sites. Batch adsorption conducted on diluted WWW revealed the better performance of GPAC (84.3% removal) as compared to EGP (48.5% removal) under similar conditions; with maximum adsorption taking place at pH 3.8.While pH studies indicated a possible electron-donor-acceptor mechanism in the binding of TPP, kinetic studies indicated that diffusion was mediated by the porosity in GPAC. Isotherm studies conducted on GPAC and commercial carbon (CAC) revealed multilayer binding under WWW while Langmuir model was operative under simulated conditions. Contrary to the better performance of CAC, the same for GPAC was comparable at higher dosage where >80%TPP was removed from undiluted WWW. The phenol adsorption capacity of GPAC from real (28.4 mg/g) and from simulated wastewater (142.6 mg/g) was higher as compared to other reported adsorbents. Desorption of TPP from loaded GPAC was maximum (∼91%) with 1:1 ethanol-water solvent.The results reveal a sustainable eco-friendly solution for valorisation of exhausted grape pomace for recovery of polyphenols from wine wastewater.

Research paper thumbnail of Valorisation potential of Cabernet grape pomace for the recovery of polyphenols: Process intensification, optimisation and study of kinetics

Food and Bioproducts Processing, May 1, 2018

Highlights  High bioactive components reveals valorisation potential of the Cabernet pomace  yi... more Highlights  High bioactive components reveals valorisation potential of the Cabernet pomace  yield of polyphenols has a direct correlation on the extraction conditions  Ultrasound as a standalone is insufficient in enhancing yield of polyphenols  ultrasound with shaking involves low energy, accelerated and intensified polyphenols  Results reveal sustainable polyphenols extraction from grape pomace

Research paper thumbnail of Polyphenols removal in winery wastewater using an AnSBR

The aim of this work was to study along of different cycles the biomass adaptation process to tot... more The aim of this work was to study along of different cycles the biomass adaptation process to total polyphenols (TPP) concentrations in an Anaerobic Sequencing Batch Reactor (AnSBR) and to evaluate the degradation of TPP and COD in winery wastewater (WWW). A lab-scale AnSBR was operated at 30º C with intermittent stirring and was fed with WWW with a COD of 182.25 g/l and a TPP concentration of 489 mg/l. The AnSBR was operated in four cycles, after the first cycle the biomass adaptation was taken for granted since reductions in the TPP went from 56% in C1 to around 95% in the consecutive cycles. COD reduction reached the 95% to 99% for all the four cycles.