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Decomposition of dioxin-like components in a DBD reactor combined with Hg/Ar electrodeless ultraviolet

Plasma Science and Technology 2020年第3期22卷 34-39页

作者： Weixuan ZHAO Liping LIAN Yanpei WU Yanghaichao LIU Renxi ZHANG Gang LUO Huiqi HOU Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Institute of Environmental ScienceFudan UniversityShanghai 200433People’s Republic of China National Engineering Laboratory for VOCs Pollution Control Material&Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China

A new combined reactor with Hg/Ar electrodeless ultraviolet(EDUV)activated by DBD for 3,4-dichlorodiphenyl ether abatement is *** effect of specific input energy and feeding gas component on 3,4-dichlorodiphenyl ether removal efficiency has been *** with a single DBD system,this new combined process performed a significant promotion on 3,4-dichlorodiphenyl ether *** results verified that active oxygen clearly contributed to the synergistic activity of DBD-EDUV *** of emission spectra showed that UV radiation of 253.7 nm could be detected in the DBD-EDUV ***,the products of DBD-EDUV process were analyzed via gas chromatographymass spectrometer(GC-MS)to reveal involved decomposition mechanism.

关键词： dielectric barrier discharge(DBD) dioxin-like 3,4-dichlorodiphenyl ether EDUV photolysis

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中国大气背景监测点PCBs含量与分布研究

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分析测试学报 2008年第S1期27卷 109-110页

作者：吴嘉嘉郑明辉高丽荣付强中国科学院生态环境研究中心环境化学与生态毒理学国家重点实验室北京100085 中国环境监测总站北京100029

Polychlorinated biphenyls(PCBs) are stable in the environment,undergo long-range atmospheric transport,and possess the ability to bioaccumulate through the food chain which can impose a serious threat to human health and the *** is the major pathway for PCBs to transport and redistribute in the *** order to know levels and patterns of PCBs in background air in China,high-volume air samples were collected at 11 background sites from November 2007 to February *** were extracted from samples by accelerated solvent extraction(ASE) and then purified by acid silica column and fluid management systems(FMS).Confirmation and quantitative analysis were performed by HRGC-HRMS using voltage selective ion record *** concentrations of dioxin-like PCBs in background air ranged from 348.8 fg/m3 to 1 768.3 fg/m3(0.7-7.4 fg TEQ/m3),and total concentrations of indicator PCBs were from 9.0 pg/m3 up to 85.2 pg/m3,which were both lower than the concentrations of most other regions and countries.

关键词： dioxin-like PCBs indicator PCBs background air HRGC-HRMS

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Environmental levels and toxicological potencies of a novel mixed halogenated carbazole

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Emerging Contaminants 2016年第3期2卷 166-172页

作者： Miren Pena-Abaurrea Matthew Robson Sri Chaudhuri Nicole Riddell Robert McCrindle Brock Chittim Robert Parette Un-Ho Jin Stephen Safe David Poirier Ralph Ruffolo Richard Dyer Rachael Fletcher Paul A..Helm Eric J.Reiner Department of Analysis CEPSA Research CenterAlcala de Henares28805Spain Department of Chemistry University of TorontoTorontoONM5S 3H6Canada Ontario Ministry of the Environment and Climate Change TorontoONM9P 3V6Canada Conservation Ontario NewmarketONL3Y 2P5Canada Department of Chemistry Brock UniversitySt.CatharinesONL2S 3A1Canada Wellington Laboratories Inc. GuelphONN1G 3M5Canada Department of Chemistry University of GuelphGuelphONN1G 2W1Canada Matson&Associates Inc.State CollegePA16801USA Veterinary Medicine&Biomedical Sciences Texas A&M UniversityTexasTX77843e4461USA Ministry of Northern Development and Mines SudburyONP3E 6B5Canada School of the Environment University of TorontoONM5S 3EBCanada

The present work involves an extensive analytical and toxicological description of a recently identified mixed halogenated carbazole found in sediment samples,1,8-dibromo-3,6-dichloro-9H-carbazole(BCCZ).Concentrations and the relative effect potency(REP)were calculated for the target BCCZ in a set of stream sediments collected in 2008 in Ontario,*** levels calculated for BCCZ as compared to those previously assessed for legacy persistent organic pollutants(POPs)in the same samples revealed a significant contribution of BCCZ to the total organic chemical contamination(dioxin toxic equivalencies(TEQs)of BCCZ in the sediment extracts were estimated from experimental REP *** experimental data presented supports the classification of this emerging halogenated chemical as a contaminant of emerging environmental *** potential emission sources could not be identified,this study highlights the importance of on-going research for complete characterization of halogenated carbazoles and related compounds.

关键词： Halogenated carbazoles Levels GC×GC REP TEQ dioxin-like Risk assessment Regulation

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