作　　者： ; ; ; ; ; ;

机构地区： 广东工业大学

出　　处： 《生态环境学报》 2009年第4期1256-1260,共5页

摘　　要： 采集了广州市农业土壤表层（0-20cm）样品118个,采用气相色谱方法对土壤中六六六（HCHs）和滴滴涕（DDTs）进行分析,初步揭示了广州市土壤中有机氯农药的分布及残留情况,并做出潜在生态风险评价。研究结果表明：HCHs的检出率为95.8%,残留范围在ND～17.96ng·g^-1之间,平均值2.10ng·g^-1,DDT的检出率为92.4%,残留范围在ND～327.87ng·g^-1之间,平均值为18.97ng·g^-1。HCHs的4种异构体中,β-HCH质量分数最高,平均质量分数为0.86ng·g^-1,而p,p′-DDT是4种DDTs异构体中质量分数最高的,平均质量分数为11.89ng·g^-1。不同土壤利用类型中,耕地土壤中的有机氯农药残留量明显高于林地和果园地。与国内外部分地方和我国土壤环境质量标准相比,广州市农业土壤中DDTs和HCHs污染程度较低。 One hundred and eighteen samples of surface agricultural soils （0 - 20 cm depth）were collected from Guangzhou ,The residues and distribution character of HCHS and DDTS in soil were analyzed by GC/ECD （Gas chromatography with electrochemical detection）, The underlying risk were assessed with risk evaluation criterion. The results showed that HCHs were found in 95.8% of the collected soil samples and ranged from ND to 17.96 ng.g^-1 with average contents of 2.10 ng.g^-1, and DDTs were found in 92.4% and ranged from ND to 327.87 ng.g^-1 with average contents of 18.97 ng.g^-1. The highest contents of β-HCH with average contents of 0.86 ng.g^-1 among 4 HCHs isomers and ofp,p＇-DDE with average contents of 11.89 ng.g^-1 among 4 DDTs isomers were observed. The cultivated land contents of organochlorine pesticides in different soils were obvious higher than woodland and orchard land. Compared with those in other regions and China＇s ＂Soil Environment Quality Standard＂ （GB 15618-1995）, the HCHs and DDTs of pollution were generally slight in agricultural soils from Guangzhou.

关 键 词： 农业土壤 六六六 滴滴涕 残留量 风险评价

领　　域： [环境科学与工程]