| APPLICATIONS OF SERICITE IN WASTEWATER TREATMENT : REMOVAL OF Cu(II) AND Pb(II) FROM AQUEOUS SOLUTIONS |
| Diwakar Tiwari, Hyoung-Uk Kim, and Seung-Mok Lee† |
| Department of Environmental Engineering, Kwandong University, Yangyang, Gangwon-do 215-802, Korea |
Corresponding Author:
Seung-Mok Lee ,Tel: +82-33-670-3355, Fax: +82-33-670-3369, Email: leesm@kwandong.ac.kr
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Received: March 10, 2006; Accepted: August 10, 2006. |
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| ABSTRACT |
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The aim of this study is to assess the applicability of sericite in wastewater treatment particularly the removal of two important heavy metal toxic ions viz., Cu(II) and Pb(II) from aqueous solutions. The batch type experiments showed that sericite is found to be one of useful natural sorbent for the removal of these two cations from aqueous solutions and it is also to be observed that with the increase in sorptive concentration amount of metal uptake increases and the concentration dependence data obtained are fitted well for the Langmuir adsorption isotherm rather than Freundlich adsorption model. Further, the Langmuir monolayer adsorption capacity is found to be 1.674 mg g"1 for Cu(II) and 4.697 mg g"1 for Pb(II). Kinetic studies enabled, an apparent equilibria can be achieved between soild/solution interface within ca 10 mins for Cu(II) and ca 90 mins for Pb(II). Moreover, the removal behavior of sericite for these two metal ions is greatly influenced by solution pH. |
| Keywords:
Sericite | Wastewater Treatment | Cu(II) | Pb(II) | Adsorption |
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