Synthesis of some novel adsorbents for antimicrobial activity and removal of arsenic from drinking water

다국어 초록 (Multilingual Abstract)

Arsenic contamination in drinking water is alarming for human beings; especially for those people whouse ground water directly for drinking purposes. Attempts were made to design adsorbents for the removal of arsenic.
Silica gel has been tested as adsorbent for such removal. After optimizing concentration, time and amount of adsorbent,Langmuir, Freundlich and D-R isotherms are drawn to determine different parameters for the evaluation of arsenicadsorption. Kinetics of adsorption is also calculated by using pseudo first order and pseudo second order rate equations.
Zerovalent iron and manganese nanoparticles have been coated on silica gel and efficiency of removal of arsenichave been determined. Iron and manganese particles have been stabilized with polyvinyl alcohol (PVA). Similarly mixturesof iron-silver and manganese-silver nanoparticles have been synthesized by stabilizing with PVA, which show betterefficiency than individual nanoparticles of iron and manganese coated silica gel. The newly synthesized adsorbentsare very much effective for not only arsenic but also for antimicrobial activity. Concentration of arsenic in water hasbeen determined spectrophotometrically using variamine blue as indicator.

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