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Zhou L.,National Research Center for Enviornmental Analysis and Measurement | Zhang X.-L.,National Research Center for Enviornmental Analysis and Measurement | Yang W.-L.,National Research Center for Enviornmental Analysis and Measurement | Li L.-L.,National Research Center for Enviornmental Analysis and Measurement | And 4 more authors.
Huanjing Kexue/Environmental Science | Year: 2014

Thirty-three camphor tree bark samples were collected from Southern Jiangsu in August 2012. They were analyzed for organochlorine pesticides (OCPs), including hexachlorobenzene (HCB), DDTs (o, p'-DDE, p, p'-DDE, o, p'-DDD, p, p'-DDD, o, p'-DDT and p, p'-DDT), trans-chlordane and cis-chlordane. The concentrations of HCB, Σ6DDTs and ΣChlordanes ranged (dw) from 0.31 ng·g-1 to 1.81 ng·g-1, 0.40 ng·g-1 to 17.3 ng·g-1 and n. d. to 1.03 ng · g-1, respectively. Due to the high volatility, the spatial distribution of HCB in Southern Jiangsu was uniform. Compared to the other results, the HCB concentration in Southern Jiangsu was lower. The historical usage of technical DDT mixture and the dicofol-type DDT were the major sources of DDTs in southern Jiangsu. The TC/CC ratio is usually used to distinguish between aged and fresh chlordane. According to the ratio of TC/CC, the chlordane in the urban area was derived from the fresh application of technical chlordane, and that in the rural area was attributed to the historical usage. Source

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