Experimental study on elemental mercury removal by diperiodatonickelate (IV) solution

Zhao, Yi; Xue, Fangming; Zhao, Xiaochu; Guo, Tianxiang; Li, Xiaolei

Experimental study on elemental mercury removal by diperiodatonickelate (IV) solution

2013

Zhao, Yi | Xue, Fangming | Zhao, Xiaochu | Guo, Tianxiang | Li, Xiaolei

A novel method has been developed to remove elemental mercury from simulated flue gas by a diperiodatonickelate (IV) solution. The influencing factors, such as diperiodatonickelate (IV) concentration, reaction temperature, solution pH, the initial Hg0 concentration, SO2 concentration and NO concentration were investigated at a bubbling reactor. In the presence of SO2 and NO, removal efficiency of 86.2% for elemental mercury was obtained. Meanwhile, 56.2% of NO and 98% of SO2 were simultaneously removed, under the optimal experimental conditions, in which diperiodatonickelate (IV) concentration was 6×10−3mol/L, reaction temperature was 50̊C, the initial Hg0 concentration was 20μg/m3 and pH was 8.5. Moreover, based on the research results of the hydrolyzing products of IO4−, and the analysis of the removal products of Hg0, the reaction mechanism of Hg0 removal was proposed.

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