Download A Guide to the Economic Removal of Metals from Aqueous by Yogesh C. Sharma PDF

By Yogesh C. Sharma

Water pollutants is subject of big and customary quandary in the course of the international.  This publication offers the consequences and knowledge from examine and adsorption experiments performed at the removing of nickel and chromium (as good as different metals) from aqueous suggestions utilizing changed silica sand.

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Extra info for A Guide to the Economic Removal of Metals from Aqueous Solutions

Sample text

1 EDS spectrum of raw silica sand. 2) of X-ray analysis, which shows the peaks of respective elements found on the surface of silica sand. 2 EDS spectrum of modified silica sand. 2 Fourier Transform Infrared Spectroscopy The IR Spectra of raw and modified silica sand were measured on a Fourier Transform Infrared Spectrophotometer (Varian 1600 FT-IR Scimitar Series) to elucidate the functional group presenting on the surface of silica sand before and after activation. For measuring IR spectra, 5mg of raw silica sand and modified silica sand were encapsulated in 400mg of KBr.

The effects of agitation time, pH, initial metal ion concentration, and temperature on the removal of these metals were studied. In order to study the sorption isotherm, two equilibrium models, the Freundlich and Langmuir isotherms, were analyzed. The effect of a pH solution on the adsorption onto NCS was studied in the pH range from 2-9. The adsorption was endothermic, and the computation of the parameters, AH, AS, and INTRODUCTION 29 AG, indicated that the interactions were thermodynamically favourable.

Other experimental conditions were the same as in other cases. 12). The curves are single and smooth and indicate the fitness of the adsorbent for the system. 5. 12 Time variation of Cr (VI) removal at different pH values by modified silica sand (Cr(VI) concentration = 5mg/L, temp = 25°C, dose = lgm/50ml adsorbent, rpm = 150).

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