乌鲁木齐市水磨河底泥及污灌区土壤中有机氯农药的分布

THE DISTRIBUTIONS OF ORGANOCHLORINE PESTICIDES IN SEDIMENTS AND SEWAGE IRRIGATED AREA SOILS COLLECTED FROM URUMQI SHUIMOHE VALLEY

用GC-ECD定量测定了乌鲁木齐市水磨河底泥及污灌区土壤中有机氯农药的含量.结果表明:底泥样品中HCHs和DDTs的含量为0.107—111.69ng.g-1和0.476—66.512ng.g-1,有机氯农药总量为0.583—178.202ng.g-1;土壤中为0.194—6.974ng.g-1和0.520—10.438ng.g-1,有机氯农药总量为0.714—17.412ng.g-1.底泥中HCHs的α/γ比值约为4,底泥和土壤中DDT/(DDE+DDD)的比值较大.

Organochlorine pesticides （OCPs） in sediments and sewage irrigated area soils from Urumqi Shuimohe river were determined by means of GC-ECD. The results showed that HCHs and DDTs content of sediments were in the range of 0. 107-111.69ng · g^-1 and 0. 476-66. 512ng · g^-1 The content of OCPs in sediments were in the range of 0. 583-178. 202ng · g^-1 The HCHs and DDTs content in soils were in the range of 0. 194-6. 974 ng · g^-1 and 0. 520-10. 438ng · g^-1, The content of OCPs in soils were in the range of 0. 714-17.412ng · g^-1, respectively. In sediments the ratio of HCHs alpha/gamma is approach 4 indicated the industry pollution has the certain contribution to Shuimohe fiver organochlorine pesticides pollution. The ratio of DDT/ （ DDE ＋ DDD） in sediments and sewage irrigated area soils is relatively high indicated that the DDTs is persistent in the environment.