A5031816199- Adsorption and biosorption for pollutant removal
- Arsenic contamination and mitigation
- Fluoride Effects and Removal
- Selenium in Biological Systems
- Nanoparticles: synthesis and applications
- Pharmaceutical and Antibiotic Environmental Impacts
- Heavy Metal Exposure and Toxicity
- Effects and risks of endocrine disrupting chemicals
- Trace Elements in Health
- Iron oxide chemistry and applications
- Nanomaterials for catalytic reactions
- Chromium effects and bioremediation
- Geochemistry and Elemental Analysis
- Environmental remediation with nanomaterials
- Recycling and Waste Management Techniques
- Laser-Ablation Synthesis of Nanoparticles
- Microplastics and Plastic Pollution
- Electrochemical Analysis and Applications
- Moringa oleifera research and applications
- Groundwater and Isotope Geochemistry
- Mercury impact and mitigation studies
- Phosphorus and nutrient management
- Advanced Nanomaterials in Catalysis
- Analytical chemistry methods development
- Heavy metals in environment
University of Allahabad
2019-2024
University of Delhi
2023
Maharaja Sayajirao University of Baroda
2014-2021
Andhra University
1996-2021
Jawaharlal Nehru University
2009-2013
University of Colorado Boulder
1972
A green synthesis of silver nanoparticle was carried out using tobacco leaf extract. Synthesized nanoparticles were characterized UV-Vis absorption spectroscopy, TEM, EDAX, FT-IR and photoluminescence study, respectively. spectroscopy prepared colloidal solution showed maxima at 418 nm. Excitation maximum emission obtained from study found 414 576 nm, TEM analysis average particle size 8 while SAED pattern confirmed the crystalline nature synthesized nanoparticles. indicated...
AbstractIn this study we investigated the role of arsenic-resistant bacteria Arthrobacter sp. biomass for removal arsenite as well arsenate from aqueous solution. The sorption characteristics were studied a function dose, contact time and pH. Langmuir, Freundlich Dubinin-Radushkevich (D-R) models applied to describe biosorption isotherm. Langmuir model fitted equilibrium data better than capacity As+3 As+5 was found be 74.91 mg/g (pH 7.0) 81.63 3.0), respectively using 1 g/L with 30 min at...
Biomass obtained from arsenic resistant gram positive bacteria Rhodococcus sp. WB-12 was studied for the removal of arsenite aqueous solution. The biomass sorption characteristic investigated as a function doses, contact time, and pH. Langmiur Freundlich, Dubinin-Radushkevich (D-R) models were applied to describe biosorption isotherm. capacity As(III) found be 77.3 mg/g (pH 7.0) using 1 g/L with time 30 min at 30°C. Kinetic evaluation experimental data showed As (III) followed...
This study reports a novel method for preparation of water soluble CdS nanoparticles using leaf extract plant, Asparagus racemosus. The the tissue which worked as stabilizing and capping agent, assisted formation nanoparticles. Nanoparticles were characterized UV–vis spectrophotometer, Photoluminescence, TEM, EDAX, XRD FT-IR. Transmission electron microscopy followed by selected area diffraction pattern analysis indicated spherical, polydispersed, crystalline, diameter ranging from 2 to 8...
Abstract The tannery industry influences the gross domestic product/economic activity of any country, but uncontrolled release effluents causes environmental degradation and increases health risks to human. reason for toxicity is presence high concentrations organic inorganic chemicals used in production leather goods. Untreated or partially treated discharged into surface water results an increase both chemical biological oxygen demand as well levels total suspended solids, dissolved toxic...
Fluorosis due to consuming an elevated amount of fluoride-containing groundwater is believed be a serious public health-related issue. A calcium pretreated wood Pinus roxburghii was converted into biochar and examined for fluoride uptake from aqueous solution. Further characterization performed using FT-IR SEM EDAX analysis. Results suggested the involvement different functional groups in sorption process. Scanning microscopy elemental analysis showed porous structure with appreciably high...
In this research study, a new bio adsorbent has been developed by synthesis of zirconium nanoparticles using Zingiber officinale rhizome extract and its subsequent entrapment in calcium alginate-carrageenin hydro gel beads. The characterisation synthesised were carried out SEM, TEM, SAED, EDAX FT-IR. resulting Zr-alginate-carrageenin, hydrogel beads further subjected to batch sorption studies. Various physicochemical parameters such as pH, contact time, biomass doses optimised for maximum...