Gao Li R, Xia Dan, Tian Hai Z, Zhang Hai J, Liu Li D, Wang Yi W
a State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing , China.
J Environ Sci Health B. 2015;50(5):322-30. doi: 10.1080/03601234.2015.1000172.
Organochlorine pesticides (OCPs) were analyzed in 26 surface sediment samples from the Liaohe River basin, and the distributions of and potential environmental risks posed by OCPs in the basin were evaluated. Eighteen OCPs listed in the Stockholm Convention were determined using isotope-dilution gas chromatography-high resolution mass spectrometry. This is the first study of hexachlorobenzene (HCB) in the Liaohe River basin sediments. The total OCP concentrations were 0.39-68.06 ng g(-1) dry weight. The total α-, β-, γ-, and δ-hexachlorocyclohexane (HCH), the total dichlorodiphenyltrichloroethane (DDT - p,p'-dichlorodiphenyldichloroethane (DDD), p,p'-dichlorodiphenyldichloroethylene (DDE), o,p(')-DDT, and p,p'-DDT), and the HCB concentrations in the sediment samples were 0.1-28.48 ng g(-1) (mean 4.01 ng g(-1)), 0.08-6.52 ng g(-1) (mean 3.07 ng g(-1)), and 0.18-24.8 ng g(-1) (mean 4.38 ng g(-1)), respectively. The HCB concentrations were higher than the concentrations of the other OCPs, and the HCHs and HCB together were the dominant OCPs. β-HCH was the most abundant HCH isomer. The concentrations of DDTs and other OCPs were relatively low, and the (DDE+DDD)/DDT ratios (>0.5) and DDD/DDE ratios (<1) indicated that no recent DDT inputs had occurred in the Liaohe River system. The main sources of HCHs were probably the historical production and agricultural use of HCH in the study area. The DDT and HCH concentrations were generally below or similar to the concentrations that have been found in other parts of the world. An ecotoxicological evaluation indicated that HCHs in surface sediments pose slight risks to human and ecological health in the Liaohe River basin.
对辽河盆地26个表层沉积物样本中的有机氯农药（OCPs）进行了分析，并评估了该盆地中OCPs的分布及潜在环境风险。采用同位素稀释气相色谱 - 高分辨率质谱法测定了《斯德哥尔摩公约》列出的18种OCPs。这是对辽河盆地沉积物中六氯苯（HCB）的首次研究。OCPs的总浓度为0.39 - 68.06 ng g(-1)干重。沉积物样本中总α -、β -、γ - 和δ - 六氯环己烷（HCH）、总二氯二苯三氯乙烷（DDT - p,p'-二氯二苯二氯乙烷（DDD）、p,p'-二氯二苯二氯乙烯（DDE）、o,p(')-DDT和p,p'-DDT）以及HCB的浓度分别为0.1 - 28.48 ng g(-1)（平均4.01 ng g(-1)）、0.08 - 6.52 ng g(-1)（平均3.07 ng g(-1)）和0.18 - 24.8 ng g(-1)（平均4.38 ng g(-1)）。HCB的浓度高于其他OCPs的浓度，HCHs和HCB共同构成了主要的OCPs。β - HCH是含量最高的HCH异构体。DDTs和其他OCPs的浓度相对较低，（DDE + DDD）/ DDT比率（>0.5）和DDD / DDE比率（<1）表明辽河系统近期没有DDT输入。HCHs的主要来源可能是研究区域内HCH的历史生产和农业使用。DDT和HCH的浓度总体上低于或类似于世界其他地区发现的浓度。生态毒理学评估表明，表层沉积物中的HCHs对辽河盆地的人类和生态健康构成轻微风险。
