不同添加剂对重金属复合污染土壤的修复效果研究  

Remediation Effects of Different Additives on the Soil Contaminated by Heavy Metals

作　　者：张丽洁[1] 谈献和[2] 韩静[1] 王炳军[1] 刘德辉[1] 

机构地区：[1]南京农业大学资源与环境科学学院,江苏南京210095 [2]南京中医药大学药学院,江苏南京210046

出　　处：《土壤通报》2009年第5期1176-1180,共5页Chinese Journal of Soil Science

基　　金：国家科技支撑计划"有效恢复中药材生产立地条件与土壤微生态环境修复技术研究"(2006BAI09B03)项目

摘　　要：试验通过添加不同剂量的糠醛渣、磷矿粉、风化煤于Cu、Zn、Pb复合污染的滨海轻盐渍土和旱地红壤中,研究不同添加剂对滨海轻盐渍土和旱地红壤重金属复合污染土壤的修复效果。结果表明,供试的三种添加剂均可不同程度地降低滨海轻盐渍土中有效态Cu、Zn、Pb的含量,三种添加剂对滨海轻盐渍土的修复效果均好于旱地红壤;施用三种添加剂30d和120d相比较,施用120d后两种土壤的有效态Cu、Zn、Pb的含量均较低,其中又以风化煤修复滨海轻盐渍土的效果最佳。当风化煤修复滨海轻盐渍土(120d)时,其修复效果随着添加量的增加而增强,当风化煤的添加量最大(120gkg-1土)时,修复滨海轻盐渍土中Cu、Zn、Pb污染的效果均最为理想,滨海轻盐渍土中的有效态Cu、Zn、Pb的含量分别下降了46.02%,61.16%,29.17%。而对于重金属复合污染的旱地红壤,三种添加剂中仅磷矿粉表现出一定的修复效果,其中对Pb污染的修复效果最明显,而其他两种添加剂对三种重金属元素的修复效果都甚差。The effects of remediation on the heavy metal contaminated coastal saline soil and upland red soils in which furfural dreg; phosphate rock and weathered coal were applied with pot culture. The results showed that all the three additives could decrease the content of available heavy metal in the coastal saline soil, and the effect in coastal saline soil was better than the effect in upland red soil. Compared with the effect of remediation the contaminated soils for 30 culture days and for 120 culture days, the latter was better, and weathered coal could obviously decrease the content of available heavy metals in the coastal saline soil at 120 d. When the application dose of weathered coal was 120 g kg^-1, the available contents of Cu, Zn and Pb in the coastal saline soil were the lowest, the available contents of Cu, Zn, Pb decreased 46.02%, 61.16% and 29.17%, respectively. On the upland red soil, only phosphate rock represented some remediation effect, especially for Pb decrease. Furfural dreg and weathered coal almost had no remediation effect for heavy metals.

关 键 词：重金属污染 土壤修复 糠醛渣 磷矿粉 风化煤 

分 类 号：X53[环境科学与工程—环境工程]