本研究之目的為研發經濟實用之廢土放射性物質處理技術，利用微波去除核種具有設備簡單、易操作、處理時間短等優點。首先嘗試以歐盟SM&T (Standard,Measurements and testing programme, formly BCR)法、泰司爾(Tessier)法及富氏修正(Modified fostner)法等三種連續萃取方法測試結果，了解放射性汙染物/sup 60/Co在土壤中各種相態之分佈情形，進而找出去除核種之適當試劑，再以微波法配合除汙。由實驗得知草酸銨為萃取效果最好之藥劑，此外，並針對影響微波處理之因素如添加藥劑方式、藥劑濃度、微波次數、清洗方式及風乾方式分別探討。目前放射性核種－鈷之去除最佳條件為：固液比為1:10，以0.5M草酸銨溶液在600W的微波功率下微波萃取15分鐘並重複一次，每次萃取完後以蒸餾水微波清洗，去除效率可達72.37%。 The goals of this study are to characterize the radionuclides absorbedon soil and to remove these radio metal from contaminated soil bymicrowave treatment. This study is concentrated on the application ofmicrowave oven for chemical extraction of radionuclide Co in soil. Thevarious experimental condition (microwave power, organic reagents,chelating agent, extraction time, and extraction sequences) wereexplored and optimized to improve the removing efficiency. The resultsshowed that the removal of /sup 60/Co was 42.76% after microwavetreatment with ammonium oxalate solution. However, the microwaveremoving efficiency of /sup 60/Co with ammonium oxalate solution twicewere improved and increased to 72.37%. The microwave treatment hasadvantages of simple operation, decrease processing time and low costequipment required.