李立平;王亚利;冉永亮;邢维芹;齐力;赵彦锋;

• 1:河南工业大学化学化工学院
• 2:郑州大学自然资源与生态环境研究所

摘要(Abstract)：

铅冶炼过程向环境释放重金属和SO2污染物,然而,冶炼企业对附近土壤酸碱性和电导率的影响以及这些土壤性质与重金属有效性的关系研究不足。本研究在华北平原某铅冶炼厂以北农田采集0～20 cm耕层的土壤样品,分析土壤pH值和电导率与DTPA态重金属的关系。结果表明:冶炼厂附近农田土壤pH值变化范围为7.26～8.63(中值为8.22),电导率变化范围为0.101 5～0.204 5 mS/cm(中值为0.127 2 mS/cm);距离冶炼厂较近处土壤pH值较低、电导率较高;土壤pH值与DTPA态Ni、Cu、Pb、Zn和Cd均呈显著负相关(P<0.05),电导率仅与DTPA态Cd存在显著正相关(P<0.05);因子分析表明,冶炼厂是土壤重金属有效性增加的主要因素,而采样区北端附近的另一污染源是造成土壤电导率增加的主要因素,2个污染源对土壤pH值下降的贡献程度基本相同。说明该铅冶炼厂造成附近农田土壤pH值下降、电导率升高,且重金属有效性增加,但土壤pH值下降并非重金属有效性上升的主要因素。

关键词(KeyWords)： 冶炼;土壤;pH;电导率;重金属;有效性

Abstract:

Keywords:

基金项目(Foundation): 河南省教育厅自然科学研究计划项目(2011A610006)

作者(Author): 李立平;王亚利;冉永亮;邢维芹;齐力;赵彦锋;

Email:

DOI: 10.16318/j.cnki.hbnykx.2012.09.002

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