徐州市城区土壤重金属污染状况及来源浅析
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摘要
采用野外调查与室内分析相结合的方法,对徐州市城区表层土壤进行了系统采样分析,测定了土壤中Cr、Ni、Cu、Zn、As、Cd、Hg和Pb的含量,并结合相关分析法对土壤重金属的主要来源进行初步解析。结果表明,上述8种元素的含量均超过自然褐土的背景值,有部分样品的Cr、Zn、As和Cd含量超过了国家标准(GB 15618-2018)中的农用地土壤污染风险筛选值,尤其是Cr的最高含量已接近于农用地土壤污染风险管制值。相关分析表明,Ni、Cu、Zn、As和Pb可能来源于成土母质;Cr与Cd、Hg等受人为因素的影响较大。
The topsoil samples in urban region of Xuzhou city were analyzed by means of field survey and laboratory analysis,and then the concentrations of Cr,Ni,Cu,Zn,As,Cd,Hg and Pb in the samples were measured and the sources of the heavy metals were studied with the aid of correlation analysis.The results indicated that the concentrations of the eight elements were higher than the average quantity of nature cinnamon soil of the area,respectively.The contents of Cr,Zn,As and Cd in some samples were beyond the risk screening values for soil contamination of agricultural land in the National Standard(GB 15618-2008),especially the maximum of Cr content was close to risk intervention value.The sources of Ni,Cu,Zn,As and Pb were mainly from parent material,while the contents of Cr,Cd and Hg were presumably influenced by anthropogenic activities.
The topsoil samples in urban region of Xuzhou city were analyzed by means of field survey and laboratory analysis,and then the concentrations of Cr,Ni,Cu,Zn,As,Cd,Hg and Pb in the samples were measured and the sources of the heavy metals were studied with the aid of correlation analysis.The results indicated that the concentrations of the eight elements were higher than the average quantity of nature cinnamon soil of the area,respectively.The contents of Cr,Zn,As and Cd in some samples were beyond the risk screening values for soil contamination of agricultural land in the National Standard(GB 15618-2008),especially the maximum of Cr content was close to risk intervention value.The sources of Ni,Cu,Zn,As and Pb were mainly from parent material,while the contents of Cr,Cd and Hg were presumably influenced by anthropogenic activities.
引文
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[2] 毛应明,桑树勋,王学松,等.徐州市城区土壤pH值分布特征研究[J].环境科学与技术,2013,36(8):77-80.
[3] 姚刚,刘纪元,刘文青.基于扎根理论的城市转型中的城市形象定位研究-以徐州市为例[J].现代城市研究,2014,(2):20-24,46.
[4] Mao Y,Sang S,Liu S,et al.Spatial distribution of pH and organic matter in urban soils and its implications on site-specific land uses in Xuzhou,China[J].Comptes Rendus Biologies,2014,337:332-337.
[5] 于法展,尤海梅,李保杰,等.徐州市不同功能城区绿地土壤的理化性质分析[J].水土保持研究,2007,14(3):85-88.
[6] Letan D,Grman H.,Zupan M,et al.Relationship of soil properties to fractionation of Pb and Zn in soil and their uptake into Plantago lanceolata[J].Soil and Sediment Contamination,2003,12(4):507-522.
[7] Karimi R,Ayoubi S,Jalalian A,et al.Relationships between magnetic susceptibility and heavy metals in urban topsoils in the arid region of Isfahan,central Iran[J].Journal of Applied Geophysics,2011,74:1-7.
[8] 国家环境保护局,中国环境监测总站.中国土壤元素背景值[M].北京:中国环境科学出版社,1990.
[9] 徐冰,陈亚新,郭克贞.小尺度草地土壤植被空间变异性研究[J].水土保持研究,2007,14(6):174-176.
[10] 生态环境部,国家市场监督管理总局.GB15618-2018土壤环境质量农用地土壤污染风险管控标准[S].北京:中国环境科学出版社,2018.