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Simultaneous Removal of Cd and Cr(VI) Using Fe-Loaded Zeolite |
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| Authors: | Seunghak Lee Kwanghun Lee Junboum Park |
| Affiliation: | 1Postdoctoral Researcher, Water Environment and Remediation Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea. E-mail: seunghak@kist.re.kr; formerly, Ph.D. Student, Dept. of Civil, Urban & Geosystem Engineering, Seoul National Univ., San 56-1, Sillim-Dong, Gwanak-Gu, Seoul 151-742, Korea. 2Ph.D. Student, Dept. of Civil, Urban & Geosystem Engineering, Seoul National Univ., San 56-1, Sillim-Dong, Gwanak-Gu, Seoul 151-742, Korea. E-mail: dmitri633@hotmail.com 3Associate Professor, Dept. of Civil, Urban & Geosystem Engineering, Seoul National Univ., San 56-1, Sillim-Dong, Gwanak-Gu, Seoul 151-742, Korea (corresponding author). E-mail: junbpark@snu.ac.kr |
| Abstract: | Current research focuses on the simultaneous removal of Cd and Cr(VI) in water by a newly developed material having both abilities of sorption and electrochemical reduction. The material was derived from the zeolite modified by Fe(II) chloride followed by sodium borohydride reduction. The Fe-loaded zeolite simultaneously removed Cd and Cr(VI) to below the detection limit at a fairly rapid rate within 1?h for Cd and within 20?h for Cr(VI), under the pH ranging from slightly acid to around neutral. At high concentration of coexisting Cr(VI), the removal efficiency of Fe-loaded zeolite for Cd slightly decreased due to surface fouling by Cr(III) hydroxide precipitations. On the contrary, the coexisting Cd was found to increase the removal rate of Cr(VI) by Fe-loaded zeolite. From the test results, the Fe-loaded zeolite was found to be a possible alternative in simultaneous removal of Cd and Cr(VI) in the aqueous phase. |
| Keywords: | Abatement and removal Water treatment Sorption |