Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
Volume 102, Issue 13, Pages 3094-3108Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03067319.2020.1763972
Keywords
Adsorption; Box-Behnken design; chromium; modified sesame hull; isotherms
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This study investigated the chromium adsorption by modified sesame hull and identified the optimal operating conditions. The results showed that modified sesame hull can be used as an efficient adsorbent for chromium removal from aqueous solutions.
The presence of chromium in the environment can be the cause of many toxic effects. The aim of this study was chromium adsorption by modified sesame hull at batch conditions. The effect of different variables such as pH, contact time, chromium concentration, and adsorbent dosage on the chromium adsorption was studied using the Box-Behnken Design. The high R-2 (0.9763) indicated a high correlation between the experimental and predicted values. The optimum pH, contact time, initial chromium concentration and adsorbent dosage were found to be 3, 120 min, 23.23 mg/l and 4.94 g/l, respectively. At optimum conditions, the removal efficiency of chromium obtained 100%. The results indicated that BBD model could efficiently predict the optimum conditions for the chromium adsorption. The modified sesame hull can be used as an efficient adsorbent for chromium removal from aqueous solutions.
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