Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
582767 | Journal of Hazardous Materials | 2008 | 5 Pages |
Abstract
Utilization of local Taiwan laterite (LTL) to remove aqueous cesium was investigated in this work under the conditions of various contact time, cesium (Cs) loading and temperature. Experimental results show that adsorption is instantaneous. Freundlich and Langmuir simulation results demonstrate that local Taiwan laterite has high affinity and sorption capacity for Cs at low temperatures, which may be attributed to enhanced desorption as temperature increased. Thermodynamic parameters including ÎH, ÎG and ÎS were calculated and it is indicated that Cs adsorption on LTL is an exothermic, spontaneous and physical adsorption reaction. Moreover, the adsorbed Cs is distributed evenly on the LTL surface, which is confirmed by SEM/EDS mapping images. Furthermore, the absence of apparent shifting or broadening of the kaolinite signal in XRD patterns after Cs adsorption is an indication of the non-expanding characteristic of kaolinite structure.
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Authors
Tsing-Hai Wang, Ming-Hsu Li, Wen-Chun Yeh, Yuan-Yaw Wei, Shi-Ping Teng,