Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (5): 830.doi: 10.7503/cjcu20160772

• Physical Chemistry • Previous Articles     Next Articles

Removal Performance and Mechanism of Selenite with the Highly Active Ferrous Hydroxyl Complex FHC(Cl-)

ZHANG Yong1,2, FU Mao2, WU Deli1, ZHANG Yalei1,*()   

  1. 1. State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China
    2. Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment, Guizhou Normal University, Guiyang 550001, China
  • Received:2016-11-07 Online:2017-05-10 Published:2017-04-12
  • Contact: ZHANG Yalei
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.51278356, 41572211)


The highly active ferrous hydroxyl complex[FHC(Cl-)] was synthesized by slow titration. The dynamics of Se(Ⅳ) removal by FHC(Cl-) was investigated, where the impact factors of FHC(Cl-) dosage, pH, oxygen and sodium chloride concentration were studied with response surface analysis method. The results demonstrated that the apparent rate constant(kobs) was 0.60 min-1, which was 4 times as great as that of Nano Zero-Valent Iron and 16 times that of Zero-Valent Iron. In addition, the response value of quadratic multinomial regression equation(designed by Box-Benhnken) for coding the independent variables was Y(c/c0)=0.14-0.20A+0.017B-0.27C-0.019D-0.047AB-0.095AC+0.13AD-0.010BC-0.082BD+0.33A2+0.023B2+0.097C2+0.065D2. The optimum reaction conditions were FHC(Cl-) dosage 98 mg/L, pH=7.5, the concentration of NaCl 1 mmol/L and closed system. The results of XPS indicated that Se(Ⅳ) was eventually reduced to Se(0) or Se(Ⅱ) by FHC(Cl-).

Key words: Reaction kinetics, High-reactivity, Reduction, Response surface method(RSM), X-ray photoelectron spectroscopy(XPS)

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