乙二醇是海洋油气开发行业的重点关注污染物,作为水合物抑制剂使用并随生产水持续大量排放入海,其生态风险不容忽视.本研究在对乙二醇的水生生物毒性数据进行收集、筛选和评价的基础上,有针对性地选取关键营养级典型海洋模式生物黑点青鳉(Oryzias melastigma)和日本虎斑猛水蚤(Tigriopus japonicus)开展毒性实验,并利用种间相关估计模型(interspecies correlation estimation model,ICE)预测了乙二醇对4种我国本土海洋生物的急性毒性.在此基础上,应用物种敏感度分布法(species sensitivity distribution approach,SSD)和最终急-慢性毒性比法(final acute-chronic toxicity ratio method,FACR)使用我国本土水生生物毒性数据推导了乙二醇的海洋生物水质基准.结果显示,基于毒理学实验数据和ICE模型预测数据推导的乙二醇短期海洋生物水质基准为2 498 mg·L-1,与仅基于毒理学实验数据推导的结果(2 263 mg·L-1)接近;基于短期海洋生物水质基准,利用FACR方法推导的乙二醇长期海洋生物水质基准分别为313 mg·L-1和284 mg·L1.结果表明,ICE模型和FACR方法应用于乙二醇的海洋生物水质基准推导具有较强的可行性.研究结果有望为乙二醇海洋环境管理目标的设定提供科学参考.
Abstract
Ethylene glycol is a highly concerned pollutant in the offshore oil and gas production industry.It is used as a hydrate inhibitor and discharged into marine environment with a large amount of production water,of which the ecological risk cannot be ignored.In this study,based on the collection,screening and assessment of the toxicity data of ethylene glycol for aquatic organisms,two typical marine model organisms of key trophic levels—Oryzias melastigma and Tigriopus japonicus were selected to conduct toxicity tests,and the interspecies correlation estima-tion model(ICE)was employed to predict the acute toxicity of ethylene glycol to 4 native marine species.After-wards,the species sensitivity distribution approach(SSD)and the final acute-chronic toxicity ratio method(FACR)were adopted to derive water quality criteria of ethylene glycol for marine organisms by using the toxicity data of native aquatic organisms in China.The results showed that the short-term water quality criteria of ethylene glycol for marine organisms derived by SSD approach based on both toxicology tests data and ICE model prediction data was 2 498 mg·L-1,which was close to the result(2 263 mg·L-1)obtained from toxicology tests data only.The long-term water quality criteria of ethylene glycol derived by FACR method based on the short-term water quality criteria were 313 mg·L-1 and 284 mg·L-1,respectively.Our study indicates that the ICE model and FACR method are feasible for the derivation of water quality criteria of ethylene glycol for marine organisms.These findings are expected to provide scientific reference for setting the objectives of marine environmental management regarding ethylene glycol.
关键词
乙二醇/海洋生物水质基准/物种敏感度分布/种间相关估计模型/最终急-慢性毒性
Key words
ethylene glycol/water quality criteria for marine organisms/species sensitivity distribution/interspecies correlation estimation model/final acute-chronic toxicity ratio
维普
万方数据