东南景天对镉-苯并[a]芘复合污染土壤的修复效果

被引：8

作者：

李廷强 ^{[1
]}

董增施 ^{[2
]}

姜宏 ^{[1
]}

李冰 ^{[3
]}

杨肖娥 ^{[1
]}

机构：

[1] 浙江大学环境与资源学院教育部污染环境修复与生态健康重点实验室

[2] 杭州万向职业技术学院

[3] 四川农业大学资源与环境学院

来源：

浙江大学学报(农业与生命科学版) | 2011年 / 37卷 / 04期

关键词：

苯并[a]芘; Cd; 复合污染; 东南景天; 土壤修复;

D O I：

暂无

中图分类号：

X53 [土壤污染及其防治];

学科分类号：

082803 ; 120405 ;

摘要：

采用盆栽试验研究2种生态型东南景天对镉-苯并[a]芘(Cd-B[a]P)复合污染土壤的修复效果.结果表明:在Cd-B[a]P复合处理条件下,超积累生态型东南景天生长主要受高浓度B[a]P影响,而Cd是抑制非积累生态型东南景天生长的主要因素,在低Cd处理条件下,5 mg·kg-1B[a]P能促进2种生态型东南景天根系的生长;超积累生态型东南景天地上部镉含量远远大于非积累生态型,且不受B[a]P水平的影响;2种生态型东南景天各部位B[a]P含量主要受土壤B[a]P水平的影响;在Cd-B[a]P复合处理条件下,超积累生态型东南景天对镉的去除效果显著高于非积累生态型,但在高质量浓度B[a]P(25 mg·kg-1)处理条件下,镉的去处效果明显降低;未种植物的土壤B[a]P平均去除率达到43.7%,而种植东南景天的土壤B[a]P平均去除率达到58.2%.本结果说明超积累生态型东南景天对中轻度Cd-B[a]P复合污染土壤具有较好的修复效果.

引用

页码：465 / 472

页数：8

共 19 条

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