Statistical optimization of Basic Blue 41 dye biosorption bySaccharomyces cerevisiae spent waste biomass and photo-catalyticregeneration using acid TiO2hydrosol (original) (raw)
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In this work, factorial design analysis based on central composite design of experiments was employed to study the effect of process parameters for biosorption of Reactive Red-84 dye onto bioethanol fermentation spent waste biomass of Saccharomyces cerevisiae. Factorial experiments with five factors: mixing rate rpm, incubation period h, process temperature °C, initial dye concentration mg/L and biosorbent dosage wt% (w/v) at three levels were conducted. A highly statistically significant quadratic model at 95% confidence level (p < 0.0001, R2 0.9120 and R2adj 0.8519) was developed to characterize the influence of the different considered variables on biosorption efficiency. Response surface methodology was employed to optimize the process, recording maximum biosorption % of ≈62% (51.67 mg/g) at 90 rpm, 13 h, 15°C, 100 mg/L and 0.6%, respectively. Approximately 95% of adsorbed dye was desorbed by elution with NaOH solution of pH 9 and the regenerated biosorbent was employed for four successive cycles. TiO2 nanoparticles 6–15 nm were prepared and used for photo-catalytic degradation of desorbed dye solution. The proposed integrating biosorption and photo-catalytic degradation process results in no secondary pollution in the form of any concentrated wastes, which is an important environmental aspect.
International Journal of Environmental Analytical Chemistry, 2020
In the present research, adsorptive separation of Reactive Red-3 (RR3) from aqueous solution has been studied using surface tailored fungal biomass (Trichoderma harzianum). SEM with EDAX, XRD, FTIR and TG-DTA of the adsorbent had been discussed to verify the quality and efficiency of the adsorbent. The dye solution pH of 4, biosorbent dosage (0.5 g/L), contact time (150 min) and incubation temperature (40°C) for an initial dye concentration of 100 mg/L were predicted as an optimum condition for the highest removal of dye from aqueous solution. Among various kinetic models analysed, pseudo-second order model explains well the adsorptive cycle with a comprehensive relationship between experimental and measured biosorption capacity. Removal data was also analysed by using Langmuir, Dubinin-Radushkevich, Freundlich and Temkin isotherms. The process of biosorption was well described by Freundlich isotherm because of the higher correlation coefficient. The results of the models have been used to determine the ideal mechanism of the biosorption process. Langmuir sorption capacity was estimated as 172.63 mg/g at an optimum condition. Thermodynamic studies were also analysed to evaluate the parameters such as change in enthalpy (28.982 kJ/ mol), change in Gibbs free energy and change in entropy (116.56 J/ mol K), which indicates that the biosorption process was spontaneous at all temperatures and endothermic in nature. The prepared material can be an alternative to the existing biosorbents.
An assessment and characterization for biosorption efficiency of natural dye waste
The local natural dyeing house run by a women's self-help group was generating a huge amount of dye extracted pulp. We thought of using this pulp for an alternative use other than just composting it. This biomaterial was found to be excellent heavy metal adsorbents and was demonstrated to be very effective in remediation of groundwater and surface water of chrome metals in contaminated sites of tannery operations. In this article, sorption efficacy studies were carried out on selected biomaterials known for their potential usage as natural dyes. Canna indica flower, Portulaca olecera flower and stem, Hibiscus rosa sinensis flower and Trapa natans fruit skin (exocarp) were used for sorption studies. These plant parts, after the extraction of natural dye, were dried and evaluated for biosorption of heavy metal from effluent. Batch tests indicated that hexavalent chromium sorption capacity (q e ) followed the sequence q e (Trapa) >q e (Hibiscus) >q e (Portulaca) >q e (Canna). Due to high sorptive capacity, Trapa fruit skin (exocarp) was selected. The optimization studies were carried out by taking the Trapa exocarp in powdered form, and of particular mesh size. Sorption kinetic data have shown first order reversible kinetic model for all the sorbents, however the biosorption of chromium by T. natans biomass occurred in two stages. In the first stage, 95% sorption was reported for Chromium (VI) in 15 min followed by a slower second stage. It reached equilibrium in 1 h at which 90e98% of the Chromium (VI) was biosorbed by T. natans. Experimentally reported equilibrium data fitted well with both the Langmuir and Freundlich Isotherms. The FT-IR, XRD and XPS analysis showed that the main mechanism of Chromium (VI) biosorption onto Trapa dried powder was through the binding of Chromium ions with amide group of the biomass.
Materials
Using various techniques, natural polymers can be successfully used as a matrix to immobilize a residual microbial biomass in a form that is easy to handle, namely biosorbents, and which is capable of retaining chemical species from polluted aqueous media. The biosorption process of reactive Brilliant Red HE-3B dye on a new type of biosorbent, based on a residual microbial biomass of Saccharomyces pastorianus immobilized in sodium alginate, was studied using mathematical modeling of experimental data obtained under certain conditions. Different methods, such as computer-assisted statistical analysis, were applied, considering all independent and dependent variables involved in the reactive dye biosorption process. The optimal values achieved were compared, and the experimental data supported the possibility of using the immobilized residual biomass as a biosorbent for the studied reference dye. The results were sufficient to perform dye removals higher than 70–85% in an aqueous solu...
Biodecolorization of Textile Dye Effluent by Biosorption on Fungal Biomass Materials
Physics Procedia, 2014
Colored industrial effluents have become a vital source of water pollution, and because water is the most important natural source; its treatment is a responsibility. Usually colored wastewater is treated by physical and chemical processes. But these technologies are ineffective in removing dyes, expensive and not adaptable to a wide range of colored water. Biosorption was identified as the preferred technique for bleaching colored wastewater by giving the best results. This treatment was based on the use of dead fungal biomass as new material for treating industrial colored effluents by biosorption. We studied the ability of biosorption of methylene blue (MB) by Aspergillus fumigatus and optimize the conditions for better absorption. Biosorption reaches 68% at 120 min. Similarly, the biosorbed amount increases up to 65% with pH from 4 to 6, and it's similar and around 90% for pH from 7 to 13. At ambient temperature 20-22 o C, the percentage of biosorption of methylene blue was optimal. The kinetic of biosorption is directly related to the surface of biosorbent when the particle size is also an important factor affecting the ability of biosorption. Also the biosorption of methylene blue increases with the dose of biosorbent due to an augmentation of the adsorption surface. In this study, for an initial concentration of 12 mg/L of MB (biosorbent/solution ratio=2g/L) buffered to alkaline pH, and a contact time of 120 min, biosorption takes place at an ambient temperature and reaches 93.5% under these conditions.
Revista de Chimie
The biosorption performance of both batch and liquid-solid fluidized bed operations of dead fungal biomass type (Agaricusbisporus ) for removal of methylene blue from aqueous solution was investigated. In batch system, the adsorption capacity and removal efficiency of dead fungal biomass were evaluated. In fluidized bed system, the experiments were conducted to study the effects of important parameters such as particle size (701-1400�m), initial dye concentration(10-100 mg/L), bed depth (5-15 cm) and solution flow rate (5-20 ml/min) on breakthrough curves. In batch method, the experimental data was modeled using several models (Langmuir,Freundlich, Temkin and Dubinin-Radushkviechmodels) to study equilibrium isotherms, the experimental data followed Langmuir model and the results showed that the maximum adsorption capacity obtained was (28.90, 24.15, 21.23 mg/g) at mean particle size (0.786, 0.935, 1.280 mm) respectively. In Fluidized-bed method, the results show that the total ion u...
Chemical Engineering Journal, 2009
A biosorbent was developed by mixing the macro-fungus Agaricus bisporus and Thuja orientalis cones and successfully used for the biosorption of Reactive Blue 49 (RB49) dye. The biosorbent system was evaluated in batch and continuous biosorption process. A series of batch studies was carried out to identify the optimum biosorption conditions such as pH, biosorbent dosage and equilibrium time. The biosorption process followed the pseudo-first-order and the pseudo-second-order kinetic models and the Freundlich, Langmuir and Dubinin-Radushkevich (D-R) isotherm models at different temperatures. The maximum biosorption capacity of the mixed biomass system was 1.85 × 10 −4 mol g −1 at 45 • C. The negative G • values and the positive H • values indicated that the biosorption process was spontaneous and endothermic. The dynamic flow biosorption potential of the biomass system was investigated as a function of the flow rate, column size and inlet solute concentration. FTIR and SEM analysis were used to characterize the biosorbent and biosorption mechanism. The functional groups such as carboxyl, amine, amide and hydroxyl on the biosorbent surface may be responsible for RB49 biosorption. In combination, our results suggest that this eco-friendly and economical biomass system may be useful for the removal of contaminating reactive dyes.
Water Air Soil Pollution (Published by: Springer) , 2022
The present work focuses on the feasibility of elimination of Methylene Blue dye from the textile wastewater with the use of economical organic biosorbents like Sugarcane Bagasse (SCB), Peanut Hull (PHB) and Orange peel (OPB). Batch adsorption tests were performed based on pH, temperature, contact time, initial adsorbate concentration, and dose of biosorbents as independent variables by employing a central composite design (CCD) approach of response surface methodology (RSM). After 90 min of contact time, the dye adsorption equilibrium was reached. It was explained with the help of Langmuir and Freundlich adsorption isotherms for the full concentration ranges of 20–100 mg/L. RSM combined with CCD is used to optimize the experiments for achieving the optimum conditions for the removal of dye. The adsorption data are used for the kinetic modeling from the pseudo-first- and pseudo-second-order kinetic equations. Thermodynamic parameters such as changes in entropy (∆S), enthalpy (∆H), and free energy (∆G) were investigated, also showed that the adsorption was natural and endothermic by removing the randomness of color at the solid and liquid interface. Biosorbent characterization was additionally performed by Fourier-transform infrared spectroscopy (FTIR) to study the adsorption of Methylene Blue before and after the tests. The dimensionless separation factor (RL) and expected results illustrated that SCB, PHB, and OCB could be used to substitute commercially available biosorbents for aqueous solutions and eliminate Methylene Blue dye from textile wastewater
Solid wastes from the enzyme production as a potential biosorbent to treat colored effluents containing crystal violet dye, 2020
Sugarcane bagasse, a largely available waste worldwide, was submitted to solid-state fermentation (SSF) using the fungus Metarhizium anisopliae, aiming to produce enzymes. The solid waste generated from SSF was tested as an alternative biosorbent to treat colored effluents containing crystal violet (CV) dye. The biosorbent, here named BW (bagasse waste), was characterized, and experimental tests were performed to verify the influence of pH and dosage on the CV biosorption. Isotherms and biosorption kinetics were performed, and the biosorption thermodynamic parameters were determined. The potential of BW was also evaluated for the treatment of a simulated textile effluent. The maximum biosorption capacity was 131.2 mg g −1 at 328 K, and the Liu was the most appropriate model to represent equilibrium data. The biosorption was spontaneous and endothermic. The use of BW in the simulated effluent showed that it is an efficient material, reaching color removal values of 85%. Therefore, the sugarcane bagasse generated from SSF can be considered a potential biosorbent to remove CV from textile effluents. This finding is relevant from the total environment viewpoint, since, at the same time, SSF generates enzymes and a solid waste, which in turn can be used as biosorbent to treat colored effluents.
BIOSORPTION METHOD AND BIOSORBENTS FOR DYE REMOVAL FROM INDUSTRIAL WASTEWATER: A REVIEW
Dyes used during various industrial activities in the production of the essential consumer goods, of modern life\'s, especially such as textiles, leather, cosmetics, food and beverage, paper and pulp mill cause the most important inevitable environmental pollution problems of the contemporary world?s, and also threatens the ecological balance. Especially, as a result of the textile wastewaters that contain high amounts of synthetic dyes, light transmission is reduce and the photosynthetic activity of aquatic life is adversely affected, so this situation causes a highly toxic effect on living communities. Although physical and chemical methods are used for the removal of these dyes, alternative methods such as biological systems are needed due to disadvantages like high costly, acting on a limited number of dyes types and disposal of concentrated sludge in large quantities. Biosorption method with low-cost, high metal binding capacity and its feature as microorganisms taking the main role drawn the attention of the scientific world as an alternative method for the removal of industrial waste. Studies in recent year has drawn the attention to the existence of organism which have the ability to remove many types of dyes from wastewater. Bacteria, fungi (mold-yeast and filamentous fungi), algae and seaweeds are group of organisms can be used in this regard. Trametes versicolor (white rot fungus) which is a filamentous fungus is a species of belonging to Basidiomycetes class, tested in numerous researches as a dyes remover. Rhizopus arrhizus belonging to Zygomycetes class is another fungal species tested as dyes remover. The species that belong Cladophora genus from green algs and bacteria that belong to Bacillus and Pseudomonas genus are between microorganisms group that can be used as biosorbent. This study is aimed to provide an overview to the microorganism used in biosorption method and collect latest information about the subject. The first economic feasibility studies on applicability of biosorption technology show that this process provides significantly cost savings and that the recovery of heavy metals reduces additional cost.