TY - JOUR
T1 - Removal of hexavalent chromium from aqueous solution by crosslinked mangosteen peel biosorbent
AU - Huang, K.
AU - Xiu, Y.
AU - Zhu, H.
N1 - Funding Information:
The present work was financially supported by an initiation grant-in-aid for returned Chinese scholars founded by Education Ministry of China (No. 11140065), and the special fundamental funds by Beijing Education Committee.
Publisher Copyright:
© 2014, Islamic Azad University (IAU).
PY - 2015/8/15
Y1 - 2015/8/15
N2 - In present study the potential of a new biosorbent obtained from mangosteen peel was investigated for the removal of hexavalent chromium and trivalent chromium from the aqueous solutions. The biosorbent was modified by using concentrated sulphuric acid as the crosslinking reagent. Various batch experiments were carried out testing different values of several parameters such as pH, contact time, adsorbent dosages, and metal ion concentration to identify the optimum conditions. The effect of these parameters on the adsorption capacity and selectivity was studied. Results showed that optimum pH for hexavalent chromium adsorption was 3.0 and adsorption equilibrium was attained in 120 min. The adsorption data were found to fit Langmuir model and pseudo-second-order equation. The adsorption mechanism for hexavalent chromium was found to be a complex process involving esterification, reduction and ion exchange, while cation exchange is the main route for trivalent chromium adsorption. From the above results, the crosslinked mangosteen peel gel appears to be a potential low-cost and effective adsorbent for hexavalent chromium and trivalent chromium removal from the waste water.
AB - In present study the potential of a new biosorbent obtained from mangosteen peel was investigated for the removal of hexavalent chromium and trivalent chromium from the aqueous solutions. The biosorbent was modified by using concentrated sulphuric acid as the crosslinking reagent. Various batch experiments were carried out testing different values of several parameters such as pH, contact time, adsorbent dosages, and metal ion concentration to identify the optimum conditions. The effect of these parameters on the adsorption capacity and selectivity was studied. Results showed that optimum pH for hexavalent chromium adsorption was 3.0 and adsorption equilibrium was attained in 120 min. The adsorption data were found to fit Langmuir model and pseudo-second-order equation. The adsorption mechanism for hexavalent chromium was found to be a complex process involving esterification, reduction and ion exchange, while cation exchange is the main route for trivalent chromium adsorption. From the above results, the crosslinked mangosteen peel gel appears to be a potential low-cost and effective adsorbent for hexavalent chromium and trivalent chromium removal from the waste water.
KW - Biosorption
KW - Chromium
KW - Concentrated sulphuric acid
KW - Mangosteen peel
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U2 - 10.1007/s13762-014-0650-8
DO - 10.1007/s13762-014-0650-8
M3 - Article
AN - SCOPUS:84931270230
SN - 1735-1472
VL - 12
SP - 2485
EP - 2492
JO - International Journal of Environmental Science and Technology
JF - International Journal of Environmental Science and Technology
IS - 8
ER -