By Yogesh C. Sharma

ISBN-10: 1118137159

ISBN-13: 9781118137154

ISBN-10: 1118259432

ISBN-13: 9781118259436

Water pollutants is subject of mammoth and customary problem through the international.  This ebook offers the implications and knowledge from learn and adsorption experiments conducted at the removing of nickel and chromium (as good as different metals) from aqueous ideas utilizing changed silica sand.

Chapter 1 advent (pages 1–38):
Chapter 2 fabric and strategies (pages 39–43):
Chapter three effects and Discussions (pages 45–90):
Chapter four Conclusions (pages 91–101):

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

Example text

5 shows the SEM micrographs of the raw silica sand at 5000 times magnification. 5 that the silica sand has a large number of porous structures because of fine crystals that are staggered in three-dimensional spaces. The surface is in a clean state which may ultimately increase the adsorption capacity of Cr (VI) on the silica sand. 7 show modified silica sand at xlOO and x5000 magnifications respectively. These figures of modified silica sand show the roughness of the surface which is clearly visible in the x5000 magnification as slopes and grooves.

For AA, maximum adsorption INTRODUCTION 23 was found at 25°C/ indicating exothermic adsorption, while for AC, maximum adsorption was at 40°C. C. Sharma et al. [59]. 0 x 10~2M NaC104 ionic strength, and 100 rpm. Higher removal was obtained with particles of smaller sizes of the adsorbent. 7% by increasing the temperature from 25°-35°C exhibiting exothermic nature of the process of removal. 94 Cal mol 1 , respectively; at 25°C. 5 pH. Yeast biomass for biosorbing chromium metal ion in aqueous solutions was reported by Lokeshwari et al.

5), at a pH of working solution and agitation rate of 100 rpm on a shaking thermostat. After equilibrium time, the adsorbents were separated from the aqueous phase by centrifugation at 10,000 rpm for 10 minutes. The residual concentrations of Ni(II) in supernatants were determined by UV-visible spectrophotometer (Spectronic 20, Bausch & Lomb USA) at 445 nm, using the dimethylglyoxime (DMG) method by following the standard method for examination of water and wastewater [75]. While the residual concentration of Cr (VI) in aliquot was determined by using UV-visible spectrophotometer at 540 nm with 1,5 diphenylcarbazide.

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

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