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Comprehensive monitoring of chlorinated aromatic and heteroaromatic pollutants at sites contaminated by chlorine production processes to inform policy making

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Emerging Contaminants 2020年第1期6卷 133-142页

作者： Takumi Takasuga Hiroaki Takemori Teru Yamamoto Kazuo Higashino Yuko Sasaki Roland Weber Shimadzu Techno Research INC.1Nishinokyo Shimoaicho Nakagyo-kuKyoto604-8436Japan Tokyo Metropolitan Government 8-1 Nishi-Shinjuku 2-chomeShinjuku-kuTokyo163-8001Japan The Tokyo Metropolitan Research Institute for Environmental Protection 1-7-5 Shinsuna Koto-kuTokyo136-0075Japan POPs Environmental Consulting Lindenfirststr.2373527Schw€abisch GmündGermany

The production of chlorine by the chlor-alkali process using graphite electrodes was one of the largest sources of polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/PCDFs)in history with estimates in the kg TEQ range for individual *** addition,the chlorine production predecessor processes in the former Leblanc soda factories generated large amounts of PCDD/PCDFs,also in kg TEQ range for individual *** both processes coal tar,used as pitch binder for electrodes in the chlor-alkali process or tars for sealing chlorine chambers,was the major source for PCDD/PCDFs *** complex PAH mixture in the tars which were chlorinated in the processes contained approx.1%*** in this study we screened the full range of chlorinated aromatic and heteroaromatic compounds in contaminated soils from former chlor-alkali plants in Germany and Japan as well as from a German Leblanc factory,using high resolution time-of-flight mass spectrometry *** all three sites the full range of unintentionally produced persistent organic pollutants(POPs)listed in the Stockholm Convention(PCDFs,PCDDs,PCBs,PCNs,HCB,HCBD and PeCBz)were present at high ppb levels and TEQ was up to several 100,000 ng/kg soil in hot spot ***,a wide range of other polychlorinated(PC-)PAHs(PC-phenanthrene/anthracene,PC-pyrene/fluoranthene,PC-benzo(a)anthracene/chrysene)were *** of these compound classes were present in one to two order of magnitude higher concentrations compared to ***,polychlorinated methyldibenzofurans,polychlorinated dimethyl-/ethyl-dibenzofurans,and polychlorinated carbazoles e the N-analogue of dibenzofuran-were detected at levels comparable to PCDFs at all three *** benzonitriles were detected in addition to chlorobenzenes as monoaromatic *** all three factories have stopped production 50e120 years ago,all detected chlorinated aromatics can be regarded as very *** tec

关键词： Unintentional POPs PCDD/PCDFs polychlorinated carbazoles Chlorinated PAHs Complex mixtures Fingerprint

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