Two-way long-range atmospheric transport of organochlorine pesticides (OCPs) between the Yellow River source and the Sichuan Basin, Western China
Two-way long-range atmospheric transport of organochlorine pesticides (OCPs) between the Yellow River source and the Sichuan Basin, Western China
复制标题
黄河源头与中国西部四川盆地之间有机氯农药（OCPs）的双向远距离大气迁移
DOI：
10.1016/j.scitotenv.2018.10.133
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发表时间：
2018
影响因子：
9.8
通讯作者：
Shihua Qi
中科院分区：
文献类型：
--
作者：
Huanfang Huang;Yang Ding;Wei Chen;Yuan Zhang;Wenwen Chen;Yingjie Chen;Yao Mao;Shihua Qi
本研究揭示了一个双向的远程大气传输的有机氯农药（OCPs），而不是。一个单一的模式，在中国西部。土壤和空气样品收集沿着样带长度约。1000公里。在青藏高原的黄河源和四川盆地之间。土壤和空气中的三氯氧磷浓度分别为175- 69，229（中位数567）皮克/克干重和33.6-271（中位数98.3）皮克/立方米。主要是六氯苯、六氯环己烷、滴滴涕和硫丹（硫丹一、硫丹二和硫丹硫酸盐的总和）。异构体比率表明，风化的工业级六氯环己烷、工业级滴滴涕和三氯甲烷的分布占主导地位，并证实了硫丹沿着在该样带的使用情况。此外，在该流域地区可能会出现当地新投入的林丹和可能非法使用技术滴滴涕的情况。根据异构体和代谢比例，分馏和主成分分析，确定了一个双向运输系统。一个是从四川盆地流入青藏高原的HCB、HCHs和DDTs，另一个是从青藏高原流入四川盆地的以硫和氯为主的CHLs（包括七氯、环氧化七氯、反式氯代酚和顺式氯代酚）。多元线性回归分析表明，四川盆地污染源对土壤有机氯农药的平均贡献大于青藏高原
This study revealed a two-way long-range atmospheric transport of organochlorine pesticides (OCPs) rather than.a single mode, in Western China. Soil and air samples were collected along a transect with length of ca. 1000 km.between the Yellow River source in the Qinghai-Tibet Plateau and the Sichuan Basin. Concentrations of ΣOCPs in.soils and air were detected to be 175–69,229 (median 567) pg/g dry weight and 33.6–271 (median 98.3) pg/m3,.respectively. HCB, HCHs, DDTs, and SULPHs (sum of Endosulfan-I, Endosulfan-II and Endosulfan sulfate) were.dominant. Isomeric ratios suggested dominant weathered technical HCH, technical DDT and chlordane profile,.and confirmed the current-use of Endosulfan along the transect. Furthermore, local fresh input of Lindane and.possible illegal use of technical DDT might occur in the basin area. Based on isomeric and metabolic ratios, fractionation and principal component analysis, a two-way transport system was determined. One flowed from the.Sichuan Basin to the Qinghai-Tibet Plateau comprising HCB, HCHs, and DDTs, while the other flowed reversely.from the Qinghai-Tibet Plateau to the Sichuan Basin dominating by SULPHs and CHLs (including Heptachlor, Heptachlor epoxide, trans-chlordane, and cis-chlordane). Multiple linear regression analysis demonstrated greater.average contributions of the Sichuan Basin sources onto the soil ΣOCPs than that of the Qinghai-Tibet Plateau