【摘要】 为确定珠江三角洲土壤中有机氯农药的含量、来源以及组成特点,对珠江三角洲中心地带广州、佛山、东莞城市群的土壤进行了采样、处理以及气象色谱分析,测定了其中有机氯农药的含量:其中,三地土壤中HCHs的含量范围是0.19～42.3,均值4.42ng·g-1,而且在四种HCHs的单体中β-HCH的含量在三地的土壤中分布最高;三地土壤中DDTs的含量范围是3.58～831,均值82.1ng·g-1,而DDT/(DDD+DDE)的比值在一些样品中大于2甚至更高,说明近期内仍然存在着DDTs的使用和排放。广州东莞佛山三地土壤中有机氯农药的总量分别为205、46和105t,构成了一个潜在的南海有机氯农药污染源。更多还原

【Abstract】 To determine the content and source of OCPs in soils, we took a sampling for the soils from Guangzhou, Dongguan and Foshan which lie on the center of the Pearl River Delta and determined the contents of the OCPs by gas chromatography. We knew that the HCHs ranged from 0.19 to 42.3 ng·g-1 with an average of 4.42 ng·g-1 in this area, and the contents ofβ-HCH were highest in four types of HCHs. While the gross of the DDTs in soils from three cities was 3.58 to 831 ng·g-1 and 82.1 ng·g-1 for average, and the ratios of DDT/(DDD+DDE) were more than 2 and even higher in some samples which suggested the usage and emission of DDTs in this days. It was estimated that the soil mass inventories at 0～20 cm depth were 205, 46 and 105 metric tons in Guangzhou, Dongguan and Foshan for OCPs, and a potential source of OCPs pollution for the South China Sea may come into being.更多还原