Studies on biosorption of Cr(VI) on a green resin: dry cow dung powder and tracer technique
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Nisha S. Barot
Abstract
The present investigation entails the application of dry cow dung powder (DCP) as an indigenous, inexpensive and eco-friendly material for the removal of Cr(VI) from aqueous medium. Batch biosorption experiments were conducted employing 51Cr(VI) as a tracer and the effect of various process parameters such as optimum pH, temperature, amount of resin, time of equilibration, agitation speed, concentration of metal ions and interfering effect of different salts etc. were studied. The kinetic studies were carried out employing various models but the best fitting was given by Lagergren Pseudo-second order model with high correlation coefficient R2 value of 0.997 and adsorption capacity of 10.20 mg/g. The thermodynamic parameters for biosorption were evaluated as Δ Gº = −2.837 kJ/mol, Δ Hº = −4.757 kJ/mol and ΔSº = 16.64 J/mol K, which indicated spontaneous and exothermic process with high affinity of DCP for Cr(VI). Many naturally available materials are used for the biosorption of heavy metal pollutants, where most of them are physically or chemically modified. In this research work, DCP has been utilized without any pre or post chemical treatment. Thus it manifests the principle of green chemistry and proves to be an eco-friendly resin.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Articles in the same Issue
- The influence of f-elements' oxidizing potential and ion charge on their stability in aqueous alkaline solution
- Adjustment of valence state of Pu and Np in nitric solution containing N,N-dimethylhydroxylamine and monomethylhydrazine by electrolysis
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- Adsorption of tetravalent thorium by geomedia
- Studies on biosorption of Cr(VI) on a green resin: dry cow dung powder and tracer technique
- Characterization of high active waste (155 GWd/Te) arising from fast reactor fuel reprocessing
- Radiochemical analysis of concrete samples from accelerator waste
- 90Nb – a potential PET nuclide: production and labeling of monoclonal antibodies
- Production and separation of no-carrier-added 73As and 75Se from 7Li irradiated germanium oxide target
