畜禽养殖废水灌溉土壤中重金属分布特征研究

Distribution Characteristics of Heavy Metals in Livestock Wastewater Irrigation Soil

[目的]对动物粪便有机肥灌溉的农田土壤中的Cu、Zn、Pb、Cd、Cr、Ni、As 7种重金属含量进行研究。[方法]用全自动消解及前处理系统-电感耦合等离子体质谱仪进行测定。[结果]Cr、Ni、Zn、Pb含量均未超过土壤环境质量标准一级标准值,Cd、Cu、As均未超过土壤环境质量标准二级标准值(6.5<p H<7.5)。[结论]所采集土壤样品中Cu、Zn、Pb、Cd、Cr等重金属含量均未超标,含量随土壤深度呈降低趋势。

[Objective] To animal manure fertilizer irrigation farmland soil Cu,Zn, Ph, Cd, Cr, Ni,As seven kinds of heavy metal content carry on research.[Method]Use automatic digestion and pretreatment system-inductively coupled plasma mass spectrometry for determination. [Results] Contents of Cr,Ni ,Zn and Pb were not exceed standard soil environment quality standard level.Contents of Cd,Cu,As were no more than the soft environmental quality standards for secondary standard （6.5〈pH〈7.5）.[Conclusion] The soil sample collected in Cu, Zn, Pb, Cd, Cr and other heavy metal content were not overweight, content showed a trend of decrease with soil depth.