By Yogesh C. Sharma
Water toxins is subject of mammoth and customary predicament through the international. This e-book offers the consequences and information from examine and adsorption experiments performed at the removing of nickel and chromium (as good as different metals) from aqueous ideas utilizing transformed silica sand.
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Additional info for A Guide to the Economic Removal of Metals from Aqueous Solutions
The initial concentration of solutions for Cr (VI) and Ni (II) were 5mg/L. 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).
52 m g / g , which is a comparatively good adsorption capacity. The saturated adsorption is regenerated by an acid and base treatment. The adsorption efficiency of the regenerated sawdust is found to be more than 95% of fresh sawdust for the removal of Cr (VI). , the disposal of the acid and base solution obtained that contains a high concentration of Cr (VI)] is the precipitation of Cr (VI) as Barium Chromate. 5 shows various low-cost commercial adsorbents and their adsorption capacity, which are used for removal of Cr (VI) from aqueous solutions.
A stock solution of chromium was prepared by dissolving potassium dichromate in 1000 ml distilled water, and used for preparation of chromium solution at various concentrations range. 0 x 10-2 M NaC104. Batch experiments were conducted separately for both the selected metallic species, namely Cr(VI) and Ni(II), using both nano alumina and nano iron. Batch adsorption experiments were performed by adding different quantities of nano adsorbents with 50ml of aqueous solutions of metal solutions of varying concentration in 250 ml stoppard conical flasks.