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河西走廊及兰州地区土壤中典型有机氯农药残留研究
引用本文:柳敏,吴有方,方利江,丁中原,张干,李军,高宏.河西走廊及兰州地区土壤中典型有机氯农药残留研究[J].农业环境科学学报,2012,31(2):338-344.
作者姓名:柳敏  吴有方  方利江  丁中原  张干  李军  高宏
作者单位:1. 兰州大学资源环境学院,兰州,730000
2. 中国科学研究院广州地球化学研究所,有机地球化学国家重点实验室,广州510640
基金项目:国家自然科学基金,春晖国际合作项目
摘    要:应用Agilent 7890-5975C GC-MSD对甘肃省河西走廊及兰州地区17个表层土壤样品中六六六(HCHs)和滴滴涕(DDTs)的残留水平进行分析,并对其来源进行初步解析.研究结果表明:研究区土壤中DDTs残留范围为0.22~53.69 ng·g-1,平均值为8.58ng· g-1; HCHs残留范围为0.07~9.16 ng·g-1,平均值为1.32 ng·g-1;DDTs的残留较HCHs占优势,约占二者总残留量的87%.(DDE+DDD)/DDT比值介于0.12~0.48之间,平均值为0.27,o,p'-DDT/p,p'-DDT比值在0.11~0.79之间,平均值为0.34,表明研究区土壤中的DDTs主要来源于工业源DDTs残留.α-HCH/γ-HCH介于0.64~15.5间,平均值为3.19,可推断研究区近期内不存在HCHs的使用,土壤中的HCHs残留主要来源于历史上工业HCHs和林丹的共同输入.与国内外其他地区土壤相比,该地区HCHs和DDTs的残留量处于较低水平;依照土壤环境质量标准(GB 15618-1995)的要求,研究区各采样点土壤环境处于相对安全的状态.

关 键 词:河西走廊  兰州地区  土壤  有机氯农药

Typical Organochlorine Pesticides Residues in the Topsoils of Hexi Corridor and Lanzhou Area, China
LIU Min , WU You-fang , FANG Li-jiang , DING Zhong-yuan , ZHANG Gan , LI Jun , GAO Hong.Typical Organochlorine Pesticides Residues in the Topsoils of Hexi Corridor and Lanzhou Area, China[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2012,31(2):338-344.
Authors:LIU Min  WU You-fang  FANG Li-jiang  DING Zhong-yuan  ZHANG Gan  LI Jun  GAO Hong
Institution:1*(1. College of Resource and Environment, Lanzhou University, Lanzhou 730000, China; 2. State Key laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China)
Abstract:Organochlorine pesticides(OCPs) are a group of persistent organic pollutants(POPs) because of their high toxicity, persistence and bioaccumulation. So far few data are available on the Northwest of China. In this paper, 17 topsoil samples were collected in Hexi corridor and Lanzhou area of Gansu Province, meanwhile, the HCHs and DDTs residues in these samples were determinated using Agilent 7890-5975C GC-MSD. In addition, the sources of HCHs and DDTs were appointed. The study results showed that the OCPs residue levels were in the range of 0.22~53.69 ng·g-1 for DDTs and 0.07~9.16 ng·g-1 for HCHs, respectively, in the topsoils of both Hexi corridor and Lanzhou regions. And the average content of OCPs was 8.58 ng·g-1 for DDTs and 1.32 ng·g-1 for HCHs. Moreover, the results also indicated that DDTs was dominant in both topsoils of areas, accounting for 87% of the total residues of HCHs and DDTs. Furthermore, the DDT/(DDE+DDD) ratio ranged from 0.12 to 0.48, with a mean value of 0.27, and the o,p′-DDT/p,p′-DDT ratios were from 0.11 to 0.79 with a mean value of 0.34, which denoted that DDTs residues were mainly from technical DDTs, while α-HCH/γ-HCH ratio ranged from 0.64 to 15.5, with a mean value of 3.19, indicated that HCHs residues were mainly from both historical application of technical HCHs and Lindane in the study area. Compared with those in other regions and China′s Soil Environment Quality Standard(GB 15618—1995), the topsoil burden of HCHs and DDTs in Hexi corridor and Lanzhou area was lower, which instructed that the soil environment in the study area was in a relatively safe state.
Keywords:Hexi corridor  Lanzhou area  soil  organochlorine pesticides
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