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KMID : 1024519920010020071
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Journal of the Environmental Sciences
1992 Volume.1 No. 2 p.71 ~ p.79
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Characteristics of Copper and Cadmium Partitioning in Aquatic Sediment
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Lee Gun-Ja
Park Chung-Kil
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Abstract
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Selective extraction procedure has been used to quantify copper and cadmium In association with the various phases of aquatic sediment such as exchangeable/adsorbed, carbonate, manganese oxides, organic matter and iron oxides. Changes of pH influenced on the partitioning of copper in carbonate and exchangeable/ad- sorbed phases and of cadmium in carbonate phase of aquatic sediment. Addition of NTA and EDTA, copper and cadmium associated with carbonate phase were released from sediment to water. Total partitioning coefficient was 8.361 for copper and 0.497 for cadmium. The relative binding strengths of copper and cadmium to each solid phase can be ranked by using the partitioning coefficints. For copper it was observed that carbonate > organic matter > exchangeable/adsorbed > manganese oxides > iron oxides and for cadmiunm it was observed that exchangeable/adsorbed > carbonate > manganese oxides > organic matter > iron oxides.
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KEYWORD
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copper and cadmium partitioning, aquatic sediment, partitioning coefficient, binding strength
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