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Received: 2005-10-20

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Journal of Zhejiang University SCIENCE B 2006 Vol.7 No.5 P.404~410


Hg0 absorption in potassium persulfate solution

Author(s):  Ye Qun-feng, Wang Cheng-yun, Wang Da-hui, Sun Guan, Xu Xin-hua

Affiliation(s):  Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   qunfengye@163.com

Key Words:  Potassium persulfate, Gaseous elemental mercury, Absorption, Reaction mechanism

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Ye Qun-feng, Wang Cheng-yun, Wang Da-hui, Sun Guan, Xu Xin-hua. Hg0 absorption in potassium persulfate solution[J]. Journal of Zhejiang University Science B, 2006, 7(5): 404~410.

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%A Ye Qun-feng
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T1 - Hg0 absorption in potassium persulfate solution
A1 - Ye Qun-feng
A1 - Wang Cheng-yun
A1 - Wang Da-hui
A1 - Sun Guan
A1 - Xu Xin-hua
J0 - Journal of Zhejiang University Science B
VL - 7
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2006.B0404

The aqueous phase oxidation of gaseous elemental mercury (Hg0) by potassium persulfate (KPS) catalyzed by Ag+ was investigated using a glass bubble column reactor. Concentration of gaseous mercury and potassium persulfate were measured by cold vapor atom absorption (CVAA) and ion chromatograph (IC), respectively. The effects of pH value, concentration of potassium persulfate and silver nitrate (SN), temperature, Hg0 concentration in the reactor inlet and tertiary butanol (TBA), free radical scavenger, on the removal efficiency of Hg0 were studied. The results showed that the removal efficiency of Hg0 increased with increasing concentration of potassium persulfate and silver nitrate, while temperature and TBA were negatively effective. Furthermore, the removal efficiency of Hg0 was much better in neutral solution than in both acidic and alkaline solution. But the influence of pH was almost eliminated by adding AgNO3. High Hg0 concentration has positive effect. The possible reaction mechanism of gaseous mercury was also discussed.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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