Abu Nasar | Aligarh Muslim University (original) (raw)

Papers by Abu Nasar

Water Supply

In the present investigation, a novel biosensor (GCE/PTH/MWCNT/NR) based on the nanocomposite of ... more In the present investigation, a novel biosensor (GCE/PTH/MWCNT/NR) based on the nanocomposite of polythiophene (PTH) and multiwalled carbon nanotube (MWCNT) immobilized by nitrate reductase (NR) was designed and made on a glassy carbon electrode (GCE). PTH and its composite with MWCNT were prepared by in situ oxidative polymerization. The structural features and surface morphologies of the composites were investigated by the standard analytical techniques, namely, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Measurements of the electrochemical performance and electrocatalytic activity of GCE/PTH/MWCNT/NR were carried out by cyclic voltammetry at different scan rates (20–100 mV s−1) in artificially polluted water containing nitrate ions. This laboratory-developed bio-electrode attained a maximum current density of 5.12 mAcm−2 at a scan rate of 100 mVs−1 for 8.0 mM sodium nitrate solution.

Separation Science and Technology, Jan 12, 2021

ABSTRACT In the present study, preparation and characterization of an adsorbent made from the che... more ABSTRACT In the present study, preparation and characterization of an adsorbent made from the chemically modified Putranjiva roxburghii seeds and its applicability toward removing Ni(II) abatement from water and electroplating wastewater have been thoroughly investigated. For process optimization, various physicochemical factors affecting the adsorption process were examined. The equilibrium was achieved in 60 min for the experimental conditions accompanying the Ni(II) concentration of 50 mg L−1 with the adsorbent dose of 0.2 g in 20 mL solution. The practical utility and cost-efficiency of the adsorbent have been analyzed. The present adsorbent was proved to be efficient for the decontamination of laboratory prepared polluted water and real wastewater (electroplating wastewater of the lock industry) containing Ni(II) ions. The additional advantages of facile synthesis, low-cost, and reusability of the present adsorbent make it a novel.

Scientific Reports, May 14, 2020

the low cost, eco-friendly and potential biomass, i.e. walnut (Juglans regia) shell powder was de... more the low cost, eco-friendly and potential biomass, i.e. walnut (Juglans regia) shell powder was deployed for the removal of toxic methylene blue dye from contaminated water solution. the important characterization of the waste material was conducted by using several techniques, i.e. Scanning electron microscope, fourier-transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, X-ray powder diffraction, Brunauer-Emmett-Teller surface area analysis, and Thermogravimetric analysis. the marked impact of various operating conditions, i.e. dose, concentration, time, pH and temperature on the adsorption process was investigated. increasing pH resulted in an increase of percent dye adsorption, and the adsorption mechanism was occurred by electrostatic attraction between negative adsorbent surface and positive dye molecules. the equilibrium data suited with Langmuir isotherm model while the adsorption practice followed the pseudo-second-order kinetic model. Higher temperature reduced the adsorption of dye molecules. the adsorption process was spontaneous, exothermic and chemical. the critical statistical analysis of the experimental results was directed by forming the design of the experiment, which was further, optimized by ANOVA, 3D and perturbation plots. the error and predicted values of both the studied responses as derived from the statistical model showed the agreeable results. 0.1 N HCl was found to be effective in complete desorption. The results are very practical and prove the effectiveness of walnut shell powder in the usage of decolorization for methylene blue.

Materials Research Foundations, Jan 2, 2018

Applied Water Science, 2018

In the present work, a novel biosensor (GCE/RGO/PPy/NR) based on the nanocomposite of reduced gra... more In the present work, a novel biosensor (GCE/RGO/PPy/NR) based on the nanocomposite of reduced graphene oxide (RGO), polypyrrole (PPy) immobilized by nitrate reductase (NR) was developed on a glassy carbon electrode (GCE). The conductive nanocomposite (RGO/PPy) was synthesized by in situ oxidative polymerization of pyrrole in the presence of RGO in acidic medium. A facile and green path was employed to synthesize RGO from graphene oxide (GO). This was performed by a novel route using Abelmoschus esculentus vegetable extract as a stabilizing and reducing agent for GO. The composite of reduced graphene oxide and polypyrrole (RGO/PPy) was deposited onto GCE with subsequent deposition of NR enzyme on the GCE/ RGO/PPy to develop GCE/RGO/PPy/NR biosensor. The surface morphology and structural features of the composites were studied by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrochemical behavior and electrocatalytic activity of the biosensor were examined by cyclic voltammetry at different scan rates (20-100 mV s −1) in the synthetic nitrate solution. The developed bio-anode achieved a maximum current density of 4.24 mA cm −2 at a scan rate of 100 mV s −1 for 10 mM sodium nitrate solution.

Journal of The Taiwan Institute of Chemical Engineers, Sep 1, 2016

In the present work, the potential of citrus limetta peel (CLP) as a low cost adsorbent for the r... more In the present work, the potential of citrus limetta peel (CLP) as a low cost adsorbent for the removal of Methylene blue (MB) dye was investigated. Batch adsorption studies were conducted to find out how adsorption was affected by various factors like contact time, initial dye concentration, adsorbent dosage, pH and temperature. The experimental data was analysed in the light of Langmuir, Freundlich and Temkin isotherm models. The data was found to be best represented by Langmuir adsorption isotherm with maximum adsorption capacity for monolayer coverage was found to be 227.3 mg/g. The data were analysed in the light of different available kinetic models and was observed to be best followed pseudo-second order kinetics. Desorption of MB-loaded CLP was studied with various desorbing agents and HCl was found to be most effective desorbing agent among HCl, NaOH, NaCl, CH 3 COOH and deionised doubly distilled water (DDDW). Results suggest that CLP is a very effective low cost adsorbent for the removal of dyes from wastewater.

Groundwater for Sustainable Development, Sep 1, 2017

The applicability of cucumis sativus peel (CSP) waste as a low-cost adsorbent for the removal of ... more The applicability of cucumis sativus peel (CSP) waste as a low-cost adsorbent for the removal of hazardous methylene blue dye from wastewater was evaluated. The efficacy of dye removal of the adsorbent is determined by investigating the various parameters such as adsorbent dose, contact time, initial dye concentration, particle size, pH, and temperature. The adsorbent was characterized by Scanning Electron Microscopy (SEM) and Fourier Transform Infra-Red (FTIR) spectroscopy. The isotherm analysis reveals that the adsorption process can be better described by Freundlich adsorption isotherm indicating the heterogeneous nature of the adsorbent surface. The deviation from normal or ideal Langmuir adsorption has been explained in light of nonidealized cooperative adsorption. Adsorption kinetics was found to obey pseudo-second order kinetics. Thermodynamic data reveals that the adsorption process is spontaneous and exothermic in nature. The values of ∆H˚ and ∆S˚ have been found to be negative which indicate that the feasibility of process decreases with increasing temperature. The isotherm and kinetics results have been compared and discussed with those available in the literature. The adsorbent regeneration was found to be best obtained in hydrochloric acid. The results indicate that CSP is an efficient low-cost adsorbent for the removal of methylene blue dye from wastewater.

Scientific Reports, 2018

Present investigation explores the possible reusability of synthetically contaminated wastewater ... more Present investigation explores the possible reusability of synthetically contaminated wastewater containing crystal violet (CV) organic dye using Tectona grandis sawdust (TGSD) waste as a very low-cost adsorbent. The adsorbent was characterized by proximate, SEM/EDX, FTIR, and XRD analyses. Batch adsorption studies were carried under changing conditions of contact time, the initial concentration of CV, pH, TGSD dose, TGSD particle size, and temperature. The experimental data were tested using Langmuir, Freundlich and Temkin isotherm models, and the data were best followed by Langmuir one. The kinetic results were examined in the light of different models and pseudo-second-order was obtained to be best obeyed. The values of ΔH° (28.642 kJ/mol), ΔG° (-10.776 to -7.080 kJ/mol) and ΔS° (121.8 J/K/mol) in the temperature range of 293–323 K suggested the overall process to be spontaneous, endothermic and associated with an increase in randomness. On the basis of experimental results and t...

Scientific reports, Jan 5, 2017

Polyaniline-silver (PANI-Ag)/ferritin (Frt)/glucose oxidase (GOx) biocompatible anode was utilize... more Polyaniline-silver (PANI-Ag)/ferritin (Frt)/glucose oxidase (GOx) biocompatible anode was utilized for creating power from glucose. The synthesized nanocomposite was investigated by EIS (Electrochemical impedance spectroscopy), XRD (X-ray diffraction), FTIR (Fourier transform infrared spectroscopy), SEM (Scanning electron microscopy), CV (Cyclic voltammetry), and LSV (Linear sweep voltammetry) to know the morphology, crystallinity and electrochemical behaviour of the nanocomposite. The electroactive support (PANI-Ag) was utilized for the immobilization of the enzyme (GOx) and a biocompatible mediator (Frt) to enhance the electrical signals. The electrochemical estimations of the manufactured bioanode were done by utilizing cyclic voltammetry (CV) and linear sweep voltammetry (LSV). The current density obtained by the PANI-Ag/Frt/GOx bioanode was observed to be 25.40 ± 2 mA cm(-2) at 40 mM of glucose concentration at a scan rate of 100 mVs(-1).

Analytical Chemistry Letters, Jan 2, 2019

Abstract In the present investigation, the applicability of Cucumis sativus peel (CSP) waste as a... more Abstract In the present investigation, the applicability of Cucumis sativus peel (CSP) waste as an inexpensive biosorbent for the confiscation of harmful crystal violet (CV) dye from synthetically polluted water was examined. The biosorbent was characterized by Scanning Electron Microscopy (SEM), thermo-gravimetric analysis (TGA), transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) spectroscopy. The efficacy of CSP adsorbent for the dye elimination was evaluated by studying the various parameters, namely, adsorbent dose, contact time, initial dye concentration, pH, particle size, and temperature. The comprehensive adsorption isotherm analysis reflects that the CV-CSP system complies with the Langmuir adsorption isotherm model with maximum biosorption capacity (qm) of 149.25 (mg g-1). The kinetics of the adsorption process was found to be best followed by pseudo-second-order kinetic model. The thermodynamic data indicates that the adsorption of crystal violet was feasible and endothermic in nature. The adsorbent regeneration was observed to be best obtained in sodium chloride with 17.14 % desorption.

Groundwater for Sustainable Development, 2018

In the present work, Terminalia arjuna sawdust (TASd) has been employed as an effective adsorbent... more In the present work, Terminalia arjuna sawdust (TASd) has been employed as an effective adsorbent for the elimination of crystal violet (CV) dye from synthetic wastewater. The adsorbent was characterized by scanning electron microscopy (SEM), energy dispersive Xray analysis (EDAX), thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) spectroscopy. Batch adsorption experiments have been conducted to optimize different factors affecting adsorption. The findings were observed to be best followed by Freundlich adsorption isotherm with 0.9964 as the correlation coefficient. The equilibrium was attained in 120 min and the highest adsorption capacity was observed to be 45.99 mg g-1 at the optimum adsorbent dose and pH of 0.4 g L-1 and 7, respectively. Kinetic experiments revealed that the removing process of CV by TASd obeys pseudo-first-order kinetic model and the k 1 value was found to be 0.013 min-1. The thermodynamic investigation indicates that the process of adsorption of CV by TASd is feasible, endothermic and associated with an increase of entropy. Desorption analysis shows that the used adsorbent could be better regenerated in sodium hydroxide.

International Journal of Materials Research

Desalination and Water Treatment, 2014

The kinetics of the degradation of acephate by water-soluble colloidal MnO 2 in acidic medium (HC... more The kinetics of the degradation of acephate by water-soluble colloidal MnO 2 in acidic medium (HClO 4) has been studied spectrophotometrically in the absence and presence of surfactants. The experiments have been performed under the pseudo-first-order reaction conditions with respect to MnO 2. The degradation has been observed to be fractional order with respect to acephate and HClO 4 while first order with respect to MnO 2 in the absence and presence of surfactants. It has been observed that cationic surfactant, cetyl trimethyl ammonium bromide, causes flocculation with oppositely charged colloidal MnO 2 whereas anionic surfactant, sodium dodecyl sulfate, has no considerable effect on the reaction kinetics. However, non-ionic surfactant, Triton X-100 (TX-100) accelerates the reaction rate. The catalytic effect of TX-100 has been discussed in the light of the available mathematical model. The kinetic data have been used to calculate the different activation parameters for the oxidative degradation of acephate by colloidal MnO 2 .

Herein, a magnetically separable Fe3O4 decorated chitosan was facilely synthesized, systematicall... more Herein, a magnetically separable Fe3O4 decorated chitosan was facilely synthesized, systematically characterized, and subsequently employed as a versatile adsorbing material for the adsorption of malachite green and methylene blue dyes. The prepared adsorbent was characteristically examined through Fourier transform infra-red microscopy, scanning electron microscopy with energy-dispersive X-ray analysis, transmission electron microscopy X-ray diffraction, Brunauere-Emmette-Teller surface area analysis, thermogravimetric analysis, and vibrating-sample magnetometry techniques. The performance of adsorbent was studied in batch mode and the the time-dependent experimental data were analyzed with different kinetic models, and pseudo-IInd-order was provided the best fit for the adsorption of both the dyes with a high value of the regression coefficient. The adsorption equilibrium data of both the dyes was best explained by Langmuir isotherm, and the maximum sorption capacity of MG and MB ...

Scientific Reports, 2020

The low cost, eco-friendly and potential biomass, i.e. walnut (Juglans regia) shell powder was de... more The low cost, eco-friendly and potential biomass, i.e. walnut (Juglans regia) shell powder was deployed for the removal of toxic methylene blue dye from contaminated water solution. The important characterization of the waste material was conducted by using several techniques, i.e. Scanning electron microscope, Fourier-transform infrared spectroscopy, Energy-dispersive X-ray spectroscopy, X-ray powder diffraction, Brunauer-Emmett-Teller surface area analysis, and Thermogravimetric analysis. The marked impact of various operating conditions, i.e. dose, concentration, time, pH and temperature on the adsorption process was investigated. Increasing pH resulted in an increase of percent dye adsorption, and the adsorption mechanism was occurred by electrostatic attraction between negative adsorbent surface and positive dye molecules. The equilibrium data suited with Langmuir isotherm model while the adsorption practice followed the pseudo-second-order kinetic model. Higher temperature red...

Current Analytical Chemistry

Background: The extensive industrialization and unrestricted development of dyeutilizing industri... more Background: The extensive industrialization and unrestricted development of dyeutilizing industries coupled with the shortage of proper effluent treatment methods have increased the water pollution. Disposal of dyes in a natural water system is a severe worldwide concern owing to the harmful effects on the ecosystem. Among the available wastewater treatment methods, adsorption is considered as a promising alternative in the elimination of dyes. Methods: There are a variety of ways for the modification of agro-waste, such as (i) acid modification (ii) alkali modification, (iii) surfactant modification, and (iv) preparation of activated carbon, etc. Moreover, numerous techniques have been used for the characterization of modified agro-waste, such as, SEM/EDAX, TEM, BET, TGA, and FTIR. Results: From the literature study, it was observed that the adsorption efficiency of various modified agro-waste is reliant on the nature of the adsorbent materials and different batch parameters, such ...

Materials Research Bulletin

Applications of Nanocomposite Materials in Drug Delivery

Separation Science and Technology

Journal of Magnetism and Magnetic Materials

Abstract In recent years, several industries release varying concentrations of dye-containing was... more Abstract In recent years, several industries release varying concentrations of dye-containing wastewater directly into the ecosystem and become the foremost environmental concern. The adsorption method has been recognized to be one of the most effective techniques for the remediation of wastewater. The great efforts have been made by scientists to produce highly selective, discerning, and effective adsorbents. The introduction of magnetic iron oxide nanoparticles to adsorbents has led to a new avenue in resolving water pollution problems and found to have predominant significance in the elimination of dyes more efficiently compared to traditional adsorbents. Due to their unique physicochemical properties, magnetized adsorbents (magsorbents) display high removal efficiency along with easy and fast separation of adsorbent from aqueous media simply by applying an external magnetic field. Such a facile route of separation is crucial to increase the overall efficiency of operation and has great importance for practical application. This review summarizes the notable works carried out on the application of magsorbents for the adsorptive removal of cationic methylene blue (MB) dye from wastewater. The detailed information on the BET surface area, point of zero charge, operational conditions, and results on isotherm, kinetic and thermodynamics as reported on different magsorbents have been compiled. The present paper was planned with the prime objective to make the scientists up-to-date and to provide the valuable information of the developments that have been made as yet for the elimination of MB dye from aqueous solution by employing a variety of magsorbents.