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《Environmental Chemistry》 1997-01
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EFFECTS OF HEAVY METALS JOINT ACTION ON THEIR CHARACTERISTIC OF SORPTION AND DESORPTION IN BROWN SOIL

Yu Guoying Wu Yanyu(Institute of Applied Ecology, Chinese Academy of Sciences , Shenyang, 110015)  
The effects of heavy metals joint action on the characteristic of the elements sorp-tion and desorption in soil was studied with orthogonal experimental method. The results show that the sorptions of the tested elements obey the Langmiur equation C/ (X/ m ) =1/Kb+C/b. The order of the sorption potentials of the elements on soil is PbAs X3uZnCd, but that of the sorption maximum is reverse. Cd, Pb,Cu,Zn, As, which depend not only on their toxicity, but also on their activity and desorptivity, further they effect strongely the sorption and desorption of other elements. The amounts of elements sorption and desorption are relative to the coexistant elements and their interaction besides the concentrations of elements in the equilibrium, and the results of the interaction depend on their relative contents and ratios of coexistant elements. The sorption and desorption become more complicated in the pressence of AsO43- the mechanism may be the sediment of heavy metal salt and the secondary sorption and desorption.
【Fund】: 国家自然科学基金资助课题
【CateGory Index】: X53
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