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中文摘要：
在面积为27 km^2的长江三角洲某典型污染地区用GPS定位系统布设了191个取样点,采用GC-ECD法测定了表层农田土壤16种多氯联苯组分及含量.统计结果表明,该典型区农田土壤16种多氯联苯总量变化范围是0.01--484.5 ng/g,平均值是35.52 ng/g,而且以三氯和四氯联苯为主（占55.7%）,同时也含有一定比例的五氯和六氯联苯（占44.3%）.空间分析发现,该区农田土壤中PCBs总量及其各同系物在所研究的尺度上存在较强的空间自相关格局,其PCBs的空间分布模式主要可能受到一些较为分散的人为因素影响,应重点对当地这些人为活动排污行业进行整治,以消除污染来源.
英文摘要：
191 surface farmland soil samples were collected from an area of 27 km2 in typical polluted county of the Yangtze River Delta region and analyzed for concentrations of 16 kinds of polychlorinated biphenyls. The results of statistical analysis indicated that the concentrations of PCBs in the soils ranged from 0.01-484.5 ng/g, with the average concentration of 35.52 ng/g. In farmland soils tri- and tetra-chlorinated biphenyls were the main congeners, and some proportional penta- and hexachlorinated biphenyls also existed. The spatial analysis showed that the PCBs concentrations were stronger correlated in a given spatial range, and indicated that in the farmland soil PCBs spatial distribution pattern had an extent relationship with the activities of dismantling electronic wastes, burning plastic cable and line, wastewater irrigation and some pollution enterprises position in this typical region.
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