Influence of humic substances on photolysis of divalent mercury in aqueous solution |
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| Authors: | Z F Xiao D Strömberg O Lindqvist |
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| Institution: | 1. Department of Inorganic Chemistry, G?teborg University, S-412 96, G?teborg, Sweden
2. Department of Inorganic Chemistry, Chalmers University of Technology, S-412 96, G?teborg, Sweden
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| Abstract: | Mercury (II) solutions were irradiated by a simulated sunlight in the presence of humic acid (HA) or fulvic acid (FA). Results show that, under the experimental conditions and the FA and HA chosen, less than 20% of the Hg in solution was photolysed with a rate of (1.63±0.29)×10?2 s?1 (n=23) and the rest of (2.38±0.40)×10?4 s?1 (n=23) depending on the substitutes of humic substances to which Hg were bond. The sunlight photolysis lifetimes were estimated to be 4 and 250 sunlight hours respectively under summer conditions at Stockholm latitude. |
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