College of Geosciences, China University of Petroleum, Beijing, 102249, China.
State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing, 102249, China.
Environ Geochem Health. 2018 Aug;40(4):1339-1353. doi: 10.1007/s10653-017-0060-1. Epub 2018 Feb 5.
The disinfectants and pesticides extensively used after Wenchuan 5.12 Earthquake on May 12, 2008 (so-called Wenchuan 5.12 Earthquake), for epidemic prevention purpose can raise great concerns of environmental pollution and potential personal exposure. To investigate the soil pollution caused by the intensive application in earthquake-affected areas, surface soil samples from two elementary schools, two communities and two background areas were collected in Beichuan County and Dujiangyan City once per location in spring and in autumn in 2011 and then analyzed by gas chromatography/mass spectrometry for organochlorine pesticides (OCPs). The results showed serious soil pollution of hexachlorocyclohexanes (HCHs, 0.05-60.05 ng/g) and dichloro-diphenyl-trichloroethane (DDTs, 0.06-35.79 ng/g) in the study areas compared with Wolong Nature Reserve (0.03-0.81 ng/g for HCHs and 0.02-0.40 ng/g for DDTs). The concentrations of most OCPs in soil of Beichuan County (e.g., 0.10-60.05 ng/g for HCHs and 0.17-35.79 ng/g for DDTs) were much higher than those of Dujiangyan City (e.g., 0.05-20.58 ng/g for HCHs and 0.06-10.69 ng/g for DDTs). In Beichuan County, the highest concentrations of HCHs and DDTs were found in the elementary school. In Dujiangyan City, the highest concentrations of HCHs and DDTs were found in the elementary school and the community, respectively. The concentrations of HCHs and DDTs were generally higher in spring than those in autumn. The predominant species (γ-HCH in ∑HCHs and 4,4'-DDT in ∑DDTs) and specific ratios suggested new inputs of lindane and technical DDT in the study areas. Therefore, continuous soil monitoring and possible intervention would be recommended to minimize local residents' exposure to these toxic chemicals.
2008 年 5 月 12 日汶川 5.12 地震后，为了防疫目的，广泛使用了消毒剂和农药（所谓的汶川 5.12 地震），这可能引起人们对环境污染和潜在个人暴露的极大关注。为了调查地震灾区密集应用造成的土壤污染，于 2011 年春、秋两季在北川县和都江堰市的两所小学、两个社区和两个背景地区，每个地点采集一次表层土壤样品，然后采用气相色谱/质谱法对有机氯农药（OCPs）进行分析。结果表明，与卧龙自然保护区（HCHs 为 0.03-0.81ng/g，DDTs 为 0.02-0.40ng/g）相比，研究区 HCHs（0.05-60.05ng/g）和 DDTs（0.06-35.79ng/g）的土壤污染严重。北川县（例如，HCHs 为 0.10-60.05ng/g，DDTs 为 0.17-35.79ng/g）的大多数 OCPs 浓度均高于都江堰市（例如，HCHs 为 0.05-20.58ng/g，DDTs 为 0.06-10.69ng/g）。在北川县，HCHs 和 DDTs 的浓度最高的是小学。在都江堰市，HCHs 和 DDTs 的浓度最高的分别是小学和社区。春季土壤中 HCHs 和 DDTs 的浓度普遍高于秋季。主要物种（∑HCHs 中的γ-HCH 和∑DDTs 中的 4,4'-DDT）和特定比例表明，研究区新输入了林丹和技术 DDT。因此，建议进行持续的土壤监测和可能的干预，以尽量减少当地居民接触这些有毒化学物质。
