| Determination of Hg and MeHg complexation with dissolved organic matter by fluorescence quenching titration |
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| 作者姓名： | Pingqing FU Fengchang WU Feiyue WANG |
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| 作者单位： | [1]State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China [2]Department of Environment and Geography, and Department of Chemistry |
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| 摘 要： | In natural waters inorganic mercury （Hg） and methylmercury （MeHg） are complexed with a variety of inorganic and organic ligands, such as OH^-, Cl^-, sulfide, thiols, and dissolved organic matter （DOM）. The bioavailability and toxicity of Hg and MeHg are related to their speciation, instead of their total concentrations. Among these species, Hg-DOM and MeHg-DOM complexes are the least known, due to the complexity and site-specificity of DOM in natural waters. Here we report the complexation between DOM and Hg or MeHg using fluorescence spectroscopy. The Suwannee River fulvic acid, peat humic acid, amino acid typotophan, and natural organic matter from the Suwannee River, Nordic River, and Delta Marsh were studied at their respective excitation/emission maxima,
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| 关 键 词： | 甲基水银 溶解有机物 荧光性 水文科学 毒性 |
Determination of Hg and MeHg complexation with dissolved organic matter by fluorescence quenching titration |
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| Pingqing FU Fengchang WU Feiyue WANG.Determination of Hg and MeHg complexation with dissolved organic matter by fluorescence quenching titration[J].Chinese Journal of Geochemistry,2006,25(B08):264-265. |
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| Abstract: | |
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| Keywords: | mercury methylmercury speciation dissolved organic matter fluorescence quenching titration |
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