中国水土保持科学2012，Vol.10Issue(2)：73-77,5.
新型TSADA的合成及其土壤重金属污染修复行为
Synthesis of new-type TSADA and its remediation behavior for soil heavy metal pollution
摘要
Abstract
In order to improve remediation ability of tea-saponin for heavy metal ions in the soil, the new-type green tea-saponin chelant( tea-saponin-1-amide-diethylenetriamine, TSADA) was prepared by tea saponin raw material extracted through aqueous extract-alcohol precipitation from tea seed cake. TSADA's structure was studied by FT-IR, and its superficial performance was studied as well. Results showed that its critical micelle concentration was lower than the TS' s, but Hydrophile-lipophile Balance value and foaming and stable foam ability were higher than TS' s. Meanwhile the effect of some factors such as oscillation time, chelating agent concentration, pH and ionic strength on removal rate of heavy metal ions in contaminated soil by chelate was investigated. The results showed that the removal rate of heavy metal ions increased with oscillation time, chelating agent concentration increasing, reduced with ionic strength and pH increasing. The optimum technologies of removing Pb2+ ,Cd2+ ions by chelating agent were as follows; Oscillation time was 12 h, chelating agent mass concentration was 7% , pH was 5. 0, mole concentration of Ca(NO3)2 was 10 mmol/L. Under the conditions, removal rate of Pb 2+ and Cd 2+ ions in the soil by two chelating agents both reached the maximum. Removal rate of Pb and Cd ions by TSADA was better than tea saponin' s respectively. The maximum removal rate of Pb 2+ and Cd ions by TSADA was 67. 3% and 99. 9% respectively.关键词
茶皂素/TS-1-酰胺二乙烯三胺茶皂素/螯合/重金属离子/修复Key words
tea-saponin/tea-saponin-1-amide-diethylenetriamine TSADA/ chelate/ heavy metal ion/ remediation引用本文复制引用
杨磊,傅丽君,沈金瑞..新型TSADA的合成及其土壤重金属污染修复行为[J].中国水土保持科学,2012,10(2):73-77,5.基金项目
福建省资助省属高校项目“竹炭-有机修复剂在土壤重金属污染修复中的应用研究”(2008F5048) （2008F5048）
