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cje ›› 2004, Vol. ›› Issue (6): 143-148.

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Binding of metal-ions with humic substances in aquatic environments: A review

FU Pingqing1,2, LIU Congqiang1, WU Fengchang1   

  1. 1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
    2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2003-04-30 Revised:2003-06-18 Online:2004-12-10

Abstract: Humic substances are present in most of the surface and ground waters.They are important with respect to the chemical speciation,mobility,and bioavailability of trace metals.In this paper,we summarized the basic properties of humic substances (mainly humic acids and fulvic acids) and discussed the binding mechanism of proton and metal ions onto humic substances,which indicates the influential role of humic substances in controlling the environmental behaviors of metal ions in aquatic environmental systems.Short description of the developing history of modern physio-chemical models was given.Especially we recommended the lately emerged models: ModelⅥ and NICA-Donnan model.They showed encouraging success in modeling metal-humic interactions over a wide range of conditions.The effects of aquatic humic substances on the geochemical behaviors of metal ions in aquatic environments were also discussed.However,it was also suggested that if inorganic colloids or biota in aquatic environments are to be included in metal speciation and transportation codes,a full understanding of the ternary interactions of HSwith toxic metals and inorganic colloids or biota must be gained.

Key words: Paeonia ostii, Heavy metal, Copper-tailings

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