【作者】 赵玉杰； 周其文； 刘潇威； 师荣光； 程韵韵； 夏青； 林繁；

【Author】 ZHAO Yu-jie,ZHOU Qi-wen * ,LIU Xiao-wen,SHI Rong-guang,CHENG Yun-yun,XIA Qing,LIN Fan (Agro-Environmental Protection Insttitute,MOA,Tianjin 300191,China)

【机构】 农业部环境保护科研监测所；

【摘要】 污灌引起的土壤重金属污染一直是人们关注的热点问题,本文采用统计、地质统计学(高斯条件模拟值)及空间聚类分析等方法重点研究了北京排污河灌区土壤重金属铜,锌,铅,镉,砷,汞,铬,镍等污染富集特征。结果表明,在有近40年污灌历史的北京排污河灌区,土壤重金属均有不同程度的升高,其中土壤As最高含量超过土壤环境质量标准2级值。空间聚类分析结果表明,除Hg外,其它重金属高高值聚类区主要分布在天津市北辰区与武清区之间,距离天津市越近,污染越严重,而Hg的高高值聚类区则位于龙河、北运及港沟河之间。采用高斯条件模拟值方法研究了8种重金属的空间分布情况,结果表明重金属Cu,Zn高值区沿凉水河、凤港咸河及港沟河呈带状分布,其它重金属则为块状分布。高碑店污水处理厂、天津武清区及北辰区排放的污水是研究区土壤重金属铜、锌、铅、镉、砷、铬、镍的主要污染来源,而北京大兴区污水及历史上凉水、北运河沿岸的化工厂排放的污水是研究区土壤Hg污染的主要贡献者。更多还原

【Abstract】 The effect of wastewater irrigation onthe accumulation of heavy metals is always a hot issue。In this study, statistics ,geostatistics (GaussianConditional GeostatisticalSimulations)and spatial cluster and outlier analysiswere used to assess the accumulation characteristic of the heavy metals Cu,Zn,Pb,Cd,As,Hg,Cr and Ni,in the agricultural soil of the Beijing Sewage River Irrigation Area.The results show the mean values of the heavy metals are higher than the background values ,suggesting sewage irrigation lasted for 40 years has an effect on the accumulation of the heavy metals in the study area. while only the maximum value of As exceeded the Chinese Environmental Quality Standard for Soil.The spatial cluster analysis indicates that the high-high value cluster regions of Cu,Zn,Pb,Cd ,As,Cr and Ni mainly appear in the southwest part of the study area, that are between the Wuqing District and the Beicheng District ,Tianjin. The more near the city ,the more pollution can be find, except for Hg. While the HH cluster zone of Hg is mainly located between the Ganggou River, the Beiyun River and the Long River.The Gaussian Geostatistical Simulations results show the high value regions of Cu,Zn distribute in belt while others are massive. Showing the sewage discharged by the Liangshuiriver ,theFenggangjian river and the Ganggou River have a global effect on Cu,Zn pollution while for other heavy metals the effect is regional. The distributions of heavy metals Cu,Zn,Pb,Cr,As,Cd and Ni discover that the wastewater discharged for the Gaobeidian Wastewater Treatment Plant, ,the WuqingDistrict,Tianjin and the BeichengDistrict,Tianjinare the major sources of soil pollution in the research area. While the sewage discharged from the DaxingDistrict,Beijing and the chemical plant that distributed along the BeiyunRriver and the Ganggou River in history are the source of soil Hg pollution.更多还原