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OALib Journal期刊
ISSN: 2333-9721
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螯合剂和表面活性剂辅助金福菇修复重金属污染土壤
DOI: 10.3724/SP.J.1145.2012.00100, PP. 100-107
Keywords: 螯合剂,edta,表面活性剂,金福菇,重金属污染,土壤修复
Abstract:
通过温室大棚盆栽试验，研究螯合剂和表面活性剂单独或复合处理辅助金福菇修复重金属污染土壤的效果.结果表明，单独添加edta（乙二胺四乙酸）时，高浓度的edta（e2，5mmolkg-1）使金福菇的生物量比对照降低26%，子实体pb、cu和cd的浓度分别比对照提高15~88倍、0.8~3.3倍和0.5~0.6倍.单独添加表面活性剂时，各处理生物量与对照没有显著差异，且重金属浓度变化幅度没有单独添加edta的处理大.低浓度的表面活性剂对金福菇吸收各种重金属的影响较小，而高浓度则影响较大，但与表面活性剂及重金属种类有关.共同添加edta和表面活性剂时，只有当edta和ctab（溴化十六烷基三甲铵）共同添加时，ec2（edta:ctab=1:1）和ec3（edta:ctab=2:1）的生物量显著降低，其余处理与对照差异不明显.ec3的子实体pb和cu浓度达到所有处理中的最大值，分别为(1533.61±131.34)、(1786.11±328.33)mgkg-1.edta和sds（十二烷基磺酸钠）浓度比为2:1（es3）时，子实体cd浓度达到最大值，为(50.56±11.55)mgkg-1.此外，还分析了不同处理的重金属总积累量和富集系数.结果显示，在螯合剂和表面活性剂辅助下，金福菇修复复合重金属污染土壤具有很大的潜能.图1表5参36
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