余晓华;罗勇;杨中艺;罗孝俊;袁剑刚;陈社军;麦碧娴;

• 1:中山大学生命科学学院
• 2:仲恺农业技术学院
• 3:广东省林业调查规划院
• 4:中国科学院广州地球化学研究所

摘要(Abstract)：

在广东省清远市龙塘镇电子废物焚烧区附近分别设置了主要受电子废物焚烧造成的重金属近距离沉降影响的污染区(U)和距离焚烧活动核心区约1km的水平迁移污染区(L),并在焚烧活动核心区非主风向一侧山丘的反向坡地设置了对照区(CK),探讨了不同程度的重金属污染对土壤微生物生物量碳(MBC)和土壤呼吸(SR)的影响.结果表明,土壤Cu、Pb、Cd的含量平均值均呈U区>L区>CK区,在污染严重的U区,Cu、Pb、Cd、Ni、Cr和Zn的含量平均值分别是对照区的52.2倍、5.1倍、3.2倍、2.1倍、1.9倍和1.5倍.相应地,U区土壤MBC、土壤基础呼吸(BR)和基质诱导呼吸(SIR)的平均值分别只有对照区的48.0%、28.4%和15.3%,而在污染程度相对较轻的L区则分别为对照区的97.0%、70.1%和60.7%.土壤MBC和SIR均与土壤中Zn、Cu、Pb含量呈极显著负相关(p<0.01).以上结果表明,土壤微生物的生长和土壤生物活性受到了电子废物焚烧排放物(特别是重金属)生物毒性的严重影响,土壤SIR是响应最为敏感的指标.

关键词(KeyWords)： 电子废物;焚烧;重金属;土壤微生物生物量;土壤呼吸

Abstract:

Keywords:

基金项目(Foundation): 广东省科技攻关项目(No.2006B36701005)

作者(Author): 余晓华;罗勇;杨中艺;罗孝俊;袁剑刚;陈社军;麦碧娴;

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