New PDF release: A Guide to the Economic Removal of Metals from Aqueous

By Yogesh C. Sharma

ISBN-10: 1118137159

ISBN-13: 9781118137154

Water toxins is subject of sizeable and customary difficulty during the international.  This ebook provides the consequences and knowledge from learn and adsorption experiments performed at the removing of nickel and chromium (as good as different metals) from aqueous options utilizing transformed silica sand.

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

Sample text

3 mg g_1) for its use in metal waste purification systems to be feasible. These positive results are ratified when real wastewaters are used at lab-scale as well as semi-industrial scale, validating the use of this mineral as a cost-effective treatment to purify such wastewaters. Sorption behaviour of Ni(II) was investigated by Petruzzelli et al. 8), to evaluate the effects of ligand species present in the sludge in the process of retaining heavy metals. The addition of sewage sludge extract did not reduce the sorption, but rather increased the amount of heavy metals retained by soil.

The point of intersection of these two curves has been recorded as pHzpc of raw and modified silica sand. 9 respectively. 2 Effect of Contact Time and Initial Concentration of Cr (VI) and Ni (II) During the uptake of pollutants from wastewater by the adsorption process, the following two factors play important roles: i. initial concentration of the adsorbate in the solution, and ii. time of contact between the adsorbate and adsorbent phases. A rapid transport of adsorbate species from the bulk to the surface of the adsorbent cuts short the equilibrium period.

Starch, activated charcoal, wood charcoal, and clay [51] 7. Maple sawdust [52] 8. Cushed shells and Sphagnum peat moss [53] 9. 8 31 Adsorption Adsorption was first observed by C. W. Scheele in 1773 for gases, followed by Lowitz's experiments in 1785 for solutions [73]. Adsorption is the accumulation of a substance at a surface or the interface between two phases. Adsorption is a surface phenomenon. The adsorption process can occur at any interface such as liquid-liquid, gas-solid, gas-liquid, or liquid-solid, but liquidsolid interface is of special interest from the water and wastewater treatment point of view.

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


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