University of Khartoum

Adsorption Of Chromium (Vi) From Contaminated Water Using Activated Carbon Prepared From Groundnut Shell

Adsorption Of Chromium (Vi) From Contaminated Water Using Activated Carbon Prepared From Groundnut Shell

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Title: Adsorption Of Chromium (Vi) From Contaminated Water Using Activated Carbon Prepared From Groundnut Shell
Author: Hijazi, Nahla Mohammed Hassan
Abstract: This thesis reports the feasibility of using agricultural waste to remove Cr(VI)fromartificial wastewater under different experimental condition. For this, activated carbon by zinc chloride (ZnCl2) developed from groundnut shell has been used. Effect of various process parameters, namely, pH, adsorbent dose, temperature and contact time has been studied in batch systems. The removal of chromium was dependent on the physico-chemical characteristics of the adsorbent, iodine value, pH and other studied process parameters. It was found that the iodine number and yield decreased as temperatureincreased from 400°C to 500°C. The iodine values of prepared activated carbon had an optimum value of 1540.5mg/g. maximum metal removal was observed at pH 2.0. The efficiency of activated groundnut shell for Cr(VI) removal was 85.9% for dilute solution at 1g adsorbent dose. In addition, it was found that, the removal efficiency increased from 22.41% to 85.9% by increasing the adsorbent dose from 0.4g to 1g. The experimental data were analyzed using two adsorption kinetic models – the pseudo first- and second-order equations to determine the best fit equation for the adsorption of Cr(VI) onto activated groundnut shell. Results showed that the pseudo first-order equation provides the best correlation for the adsorption process. FTIR was recorded to explore the number and position of the functional groups available for Cr (VI) binding onto studied adsorbents. Based on the experimental results the developed activated carbon from groundnut shell proved to be an effective adsorbent for removal of Cr(VI) from aqueous solutions.
Description: 82 Pages
URI: http://khartoumspace.uofk.edu/123456789/23878


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