中文关键词有机磷酸酯(OPEs)固相萃取污水处理环境风险受纳水体 英文关键词organophosphate esters (OPEs)solid phase extractionsewage treatmentenvironmental riskreceiving water

作者	单位	E-mail
张振飞	江西理工大学资源与环境工程学院, 赣州 341000 中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012	zhang_zhfei@163.com
吕佳佩	中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012
裴莹莹	中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012
王春英	江西理工大学资源与环境工程学院, 赣州 341000
郭昌胜	中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012	guocs@craes.org.cn
徐建	中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012

中文摘要 有机磷酸酯（organophosphate esters，OPEs）在环境中普遍存在，对生态系统和人体健康构成潜在的风险.在优化固相萃取（SPE）前处理方法的基上，建立了超高效液相色谱-质谱联用（UPLC-MS/MS）测定水体中8种OPEs的检测方法.实验对比了不同SPE小柱、不同洗脱液和不同洗脱液体积对8种目标化合物的回收率.结果发现，使用ENVI-18柱富集OPEs，用8 mL含25%（体积分数）二氯甲烷的乙腈洗脱，目标化合物加标回收率在92.5%~102.2%.不同基质样品加标回收率为88.5%~116.1%，RSD为1.7%~9.9%.对北京某污水处理厂不同工艺和污水受纳河流水体上下游连续6 d取样检测，污水厂出水中OPEs的浓度范围为85.9~235.4 ng·L^-1，受纳河流下游的6 d OPEs平均浓度为130.3 ng·L^-1，高于上游来水中浓度（119.4 ng·L^-1），但低于污水处理厂出水平均总浓度（162.5 ng·L^-1）.结果表明，污水处理厂不能完全去除OPEs，对磷酸三乙酯（TEP）和磷酸三（2-乙基己基）酯（TEHP）存在负去除现象，对其它OPEs的去除率在14.1%~84.9%之间，污水处理厂对总ΣOPEs去除率为50.0%.污水处理厂出水中磷酸三苯酯（TPhP）存在中等风险（RQ>0.10），其他有机磷酸酯的环境风险较低（RQ<0.10），但其长期混合作用对受纳河流生态系统产生的生态危害不容忽视. 英文摘要 Organophosphate esters (OPEs) are ubiquitous in the environment and pose a potential threat to ecosystems and human health. A method for the determination of eight OPEs by ultra-performance liquid chromatography-tandem mass spectrometer (UPLC-MS/MS) was established. The recovery rates of eight target compounds with different solid-phase extraction columns, different eluents, and different eluent volumes were compared. The results showed that using ENVI-18 column enrichment, OPEs were eluted with 8 mL acetonitrile containing 25% (volume fraction) dichloromethane, and the labeled recovery rate of the target compound was 92.5%-102.2%. The recoveries of different matrix samples were 88.5%-116.1% and relative standard deviation was 1.7%-9.9%. The concentration range of 8 different detectable organophosphate esters in the effluent of sewage treatment plant is 85.9-235.4 ng·L^-1 during the six-day sampling process, permissive river downstream of the six-day ΣOPEs average total concentration was 130.3 ng·L^-1, higher than the 119.4 ng·L^-1 upstream water concentration, but lower than the sewage treatment plant effluent concentration of total 162.5ng·L^-1. The study shows that the sewage treatment plant cannot completely remove OPEs; for triethyl phosphate (TEP) and 3 (2-ethyl hexyl) phosphate ester (TEHP) there exists a negative removal phenomenon, whereas for other OPEs the removal rate was between 14.1% and 84.9%, and the total ΣOPEs removal rate by the sewage plant was 50.0%. The TPhP in the effluent of the sewage treatment plant has medium environmental risk (RQ>0.1), and other organophosphates have low environmental risk (RQ<0.1); however, the long-term mixing effects of organophosphate esters on the ecosystem of the receiving river should not be ignored.

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