改良材料强化紫薇修复Cu污染土壤

选用木本植物紫薇为研究对象，采用室内盆栽试验方法，研究了不同有机改良材料及螯合剂二乙胺四乙酸（EDTA）和乙二胺二琥珀酸（EDDS）添加量对植物修复Cu污染土壤的影响。结果表明:螯合剂EDTA和EDDS较有机改良材料对紫薇修复Cu污染土壤强化效果好，且EDTA添加量为5 mmol/L，或EDDS添加量为3 mmol/L时，对紫薇修复土壤Cu的强化效果较好；添加有机改良材料均对紫薇修复低Cu污染土壤有强化作用，且添加量为30%时强化效果明显，但不同有机改良材料对紫薇修复高Cu污染土壤的强化作用则存在一定差异，仅50%的绿化植物废弃物、农业有机废弃物和草炭处理具有强化效果。

AMENDMENT MATERIALS ENHANCED LAGERSTROEMIA INDICA L. REMEDIATION TECHNOLOGY FOR Cu-POLLUTED SOIL

Lagerstroemia indica L., a woody plant was selected as the studied subject, and the strengthening effect of types and additive amount of amendment materials on the phytoremediation of Cu-contaminated soil were conducted with the incubation experiments. The results showed that there was a more significant enhancement effect for EDTA and EDDS than organic amendment materials, and the enhancement effect was the highest at the additive amounts of 5 mmol/L EDTA or 3 mmol/L EDDS. However, the enhancement effect was found on almost all the organic amendment materials on the lower Cu-polluted soils, and more significant at the organic amendment materials/soil volume ratio of 30%. Moreover, the strengthening effect of different amendment materials on the phytoremediation of the higher Cu-polluted soil was only found at organic amendment materials/soil volume ratio of 50% for the greenery waste, agricultural organic waste and peat.