• 作者： 林高永; 張碧芬; 王一雄
• 作者服務機構： 國立台灣大學農業化學系; 東吳大學微生物學系
• 中文摘要： 　　垃圾滲出水及蒸餾水中之銅、鋅、鉻三種重金屬在土壤中之移動，以竹子湖系粘壤土和南崁溪系粘土之管柱作淋洗實驗做研究。批次實驗結果顯示銅及鋅在垃圾滲出水中有機碳的分配常數均比在土壤的吸附常數大。在重金屬鉻淋洗過程中可能是由於土柱中形成有機物結皮或粘粒結皮而導致淋洗液未有鉻金屬溶出。經過二十六週的淋洗，蒸餾水中之銅和鋅在竹子湖系粘壤土之累積溶出率分別為1.0和23.1％，而在垃圾滲出水之重金屬，則溶出率分別降低為0.3和17.3％；南崁溪系粘土的淋洗結果，蒸餾水中之銅和鋅累積淋洗溶出率為3.3和21.4％，而在垃圾滲出水之重金屬，溶出率則降為0.7和2.7％。銅和鋅在土壤中的移動性會受到垃圾滲出水中之有機質含量的影響。在南崁溪系粘土中，以垃圾滲出水淋洗可使土壤pH值提高，由於土壤pH值逐漸上升，使得土壤對鋅的吸附力增大，因此鋅溶出很少。
• 英文摘要： In this study, we examined the mobility of copper, zinc and chromium in soil by eluting with distilledwater and municipal solid waste leachate on Chutzuhu clay loam and Nankanhsi clay. Experimental resultsindicated that the partition coefficient for both copper and zinc in the organic carbon of municipal solidwaste leachate is markedly higher than the adsorption constant to the two soils at the conditions of pH<6.In leaching experiment, chromium was not found in the leachate from soil column possibly due to theformation of organic matter cutan or clay cutan in the soil. After 26 weeks, cumulative leaching per-centages of copper and zinc from the Chutzuhu clay loam by eluting with distilled water were 1.0 and23.1%, respectively. Those levels decreased to 0.3 and 17.3%, respectively, when it was eluted with wasteleachate. In the Nankanhsi clay sample, cumulative leaching percentages for copper and zinc were 3.3 and21.4% when eluted with distilled water and were decreased to 0.7 and 2.7%, respectively, when eulted withwaste leachate. Moreover, the organic matter in the waste leachate affected the mobility of copper andzinc. Interestingly, soil pH was elevated in the Nankanhsi clay sample after eluting with municipal solidwaste leachate. This elevation caused an increase in the adsorption of zinc to soil, thereby resulting in asmall amount of zinc leaching out during the 26 week duration period.
• 中文關鍵字： hevy metal; leachate; mobility of heavy metals; partition coefficient; adsorption constant; organic carbon.
• 英文關鍵字： --