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KMID : 0903519990420020085
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1999 Volume.42 No. 2 p.85 ~ p.91
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Speciation of Cd , Cu and Zn in Sewage Sludge - Treated Soils Incubated under Aerobic and Anaerobic Conditions
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Yoo, Sun Ho
Lee, Sang Mo/Cho, Chae Moo
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Abstract
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The incubation study was conducted under aerobic and anaerobic conditions to study the release of the kinetically labile forms (i. e. chelating ion or anion forms) of Cd, Cu and Zn in sludge-untreated soil ($quot;Control$quot;), sludge 50 and 100 dry Mg ㏊^(-1) treated soils ($quot;Soil-Sludge mixtures$quot;), and sewage sludge ($quot;Sludge$quot;). The chelating ion and anion exchange membranes were embedded into the samples and incubated for 16 weeks under aerobic and anaerobic condition. The total amounts of chelating ion or anionic forms of Cd were too little to be measured during both aerobic and anaerobic incubation. On the other hand, the total amounts of chelating ion or anionic forms of Cu and Zn slightly increased throughout the incubation period under both incubation conditions. For $quot;Control$quot; and $quot;Soil-Sludge mixtures$quot; treatments, the total amounts of Cu and Zn in chelating ion and anion exchange membrane were little difference between aerobic and anaerobic condition, and the total amounts of chelating ion form of Cu and Zn were not different from the those of anionic form of Cu and Zn. However, for $quot;Sludge$quot; treatment, the total amounts of Cu and Zn in anion and chelating ion exchange membrane were greater under aerobic condition than under anaerobic condition, and the total amounts of chelating ion form of Cu and Zn were greater than those of anion form of Cu and Zn under both incubation conditions.
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