Tang Zhenwu, Huang Qifei, Cheng Jiali, Qu Dan, Yang Yufei, Guo Wei
MOE Key Laboratory of Regional Energy and Environmental Systems Optimization, Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Ecotoxicol Environ Saf. 2014 Oct;108:329-34. doi: 10.1016/j.ecoenv.2014.07.024. Epub 2014 Aug 13.
Hexachlorobutadiene (HCBD) is a potential persistent organic pollutant that has been found in abiotic environments and organisms. However, information on HCBD in soils and its accumulation in terrestrial food chains is scarce. This study investigated the accumulation of HCBD in soils, plants, and terrestrial fauna in a typical agricultural area in Eastern China, and drew comparisons with organochlorine pesticides (OCPs). The HCBD concentrations in soils were <0.02-3.1ng/g dry weight, which were similar to α-endosulfan concentrations but much lower than the concentrations of some other OCPs. The HCBD soil-plant accumulation factors, 8.5-38.1, were similar to those of o,p'-DDT and higher than those of HCHs and p,p'-DDT, indicating that HCBD is strongly bioaccumulated by rice and vegetables. HCBD concentrations of 1.3-8.2ng/g lipid weight were found in herbivorous insects, earthworms, and Chinese toads. The biomagnification factor, the ratio between the lipid-normalized concentrations in the predator and the prey, was found to be 0.16-0.64 for different food chains of Chinese toads, so HCBD was found not to biomagnify, which is in contrast with OCPs. Further research into whether HCBD is biomagnified in high trophic level organisms or through the entire terrestrial food web is required.
六氯丁二烯（HCBD）是一种潜在的持久性有机污染物，已在非生物环境和生物体中被发现。然而，关于土壤中六氯丁二烯及其在陆地食物链中的积累情况的信息却很匮乏。本研究调查了中国东部一个典型农业区土壤、植物和陆地动物体内六氯丁二烯的积累情况，并与有机氯农药（OCPs）进行了比较。土壤中六氯丁二烯的浓度为<0.02 - 3.1 ng/g干重，与α - 硫丹的浓度相似，但远低于其他一些有机氯农药的浓度。六氯丁二烯的土壤 - 植物积累因子为8.5 - 38.1，与o,p'-滴滴涕的积累因子相似，高于六氯环己烷和p,p'-滴滴涕的积累因子，这表明六氯丁二烯在水稻和蔬菜中具有很强的生物累积性。在食草昆虫、蚯蚓和中华蟾蜍体内发现六氯丁二烯的浓度为1.3 - 8.2 ng/g脂重。对于中华蟾蜍的不同食物链，生物放大因子（即捕食者与猎物中脂质归一化浓度的比值）为0.16 - 0.64，因此发现六氯丁二烯不会发生生物放大，这与有机氯农药不同。需要进一步研究六氯丁二烯在高营养级生物中或通过整个陆地食物网是否会发生生物放大。
