Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (09): 2222-2226.doi: 10.3866/PKU.WHXB20110918

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Adsorption of Se(IV) onto Beishan Granite

GUO Zhi-Jun1,2, CHEN Zong-Yuan2, WU Wang-Suo2, LIU Chun-Li1, CHEN Tao1, TIAN Wen-Yu1, LI Chun1   

  1. 1. Beijing National Laboratory for Molecular Sciences, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China;
    2. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, P. R. China
  • Received:2011-04-12 Revised:2011-06-08 Published:2011-08-26
  • Contact: LIU Chun-Li E-mail:liucl@pku.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (10775008, 11075006,91026010，20971061), Research Fund for Ph. D Program of the Ministry of Education, China (20060001032), Special Foundation for High LevelWaste Disposal, China (2007-840), Fundamental Research Funds for the Central Universities, China, Analysis Foundation (16-18) of Peking University, China.

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Abstract: The adsorption of Se(IV) onto crushed Beishan granite (BS03, 600 m) was studied by a batch experimental method. The results showed that the distribution coefficient (Kd) remained almost constant in the pH range of 3-7 and decreased at pH>7. The adsorption of Se(IV) did not vary with ionic strength. The presence of Ca2+ (4.10×10-3 mol·L-1) and SO42- (3.17×10-3 mol·L-1) had no effect on Se(IV) adsorption. Moreover, we found that the adsorption of Se(IV) (1.46×10-5 mol·L-1) and Eu(III) (3.33×10-6 mol·L-1) on Beishan granite had no effect on each other in the ternary adsorption system consisting of Se(IV)/Eu(III)/ granite. The adsorption of Se(IV) onto Beishan granite was quantitatively interpreted by considering the two surface complexation reactions of HseO3- to form ≡SHSeO3 and ≡SSeO3- on the ≡SOH general adsorption sites.

Key words: Beishan granite, Adsorption, Selenium(IV), Surface complexation model