Removal of cesium ions from aqueous solution by adsorption onto local Taiwan laterite

Tsing Hai Wang, Ming Hsu Li, Wen Chun Yeh, Yuan Yaw Wei, Shi Ping Teng

研究成果: 雜誌貢獻期刊論文同行評審

41 引文 斯高帕斯(Scopus)

摘要

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 ΔH, ΔG and ΔS 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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頁(從 - 到)638-642
頁數5
期刊Journal of Hazardous Materials
160
發行號2-3
DOIs
出版狀態已出版 - 30 12月 2008

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