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Citation: ZHANG Shuqin, LU Fusui, LI Lifang, SUN Tingting. Sorption of Pb²⁺ on Montmorillonite and Kaolinite[J]. Chinese Journal of Applied Chemistry, ;2011, 28(12): 1441-1447. doi: 10.3724/SP.J.1095.2011.00722 shu

Sorption of Pb²⁺ on Montmorillonite and Kaolinite

1.
College of Chemistry and Material Science, Shandong Agriculture University, Taian 271018

Corresponding author: ZHANG Shuqin,
Received Date: 6 December 2010
Available Online: 13 April 2011
Fund Project: 国家重大基础研究("九七三")计划(2004CB418504) ("九七三")计划(2004CB418504)2008年省博士基金(2008BS07016) (2008BS07016)山东农业大学青年创新基金(23621)资助项目 (23621)

Sorption activities of Pb²⁺ on montmorillonite and kaolinite were studied and a sorption mechanism was proposed.The sorption kinetics and the sorption isotherms of Pb²⁺ on montmorillonite and kaolinite can be described by the pseudo-second-order kinetics and Langmuir isotherm respectively.The sorption mechanism of Pb²⁺ on the montmorillonite and kaolinite is the surface complex mechanism,simultaneously forming innersphere surface complexes and outer-sphere surface complexes.The relative content of inner(or outer)-sphere surface complexes is pH dependent and is dominant beyond(or within) the pH range of 4~8,respectively.The sorption amount in mg/g of Pb²⁺ on montmorillonite is obviously higher than that on kaolinite.The affinity of montmorillonite for Pb²⁺ is higher than that of kaolinite for Pb²⁺.
- montmorillonite,
- kaolinite,
- Pb²⁺,
- sorption mechanism
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Sorption of Pb²⁺ on Montmorillonite and Kaolinite