Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China

The formation of unintentionally produced persistent organic pollutants (POPs) may occur during various chlorination processes. In this study, emissions of unintentionally produced POPs during the methanol-based production of chlorinated methanes were investigated. High concentrations of highly chlo...
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Autor*in:	Zhang, Lifei [verfasserIn] Yang, Wenlong Zhang, Linli Li, Xiaoxiu

Format:	Artikel
Sprache:	Englisch

Erschienen:	2015

Rechteinformationen:	Nutzungsrecht: Copyright © 2015 Elsevier Ltd. All rights reserved.

Schlagwörter:	Methane - chemistry Environmental Pollutants - chemistry Methanol - chemistry Environmental Pollutants - analysis

Systematik:	AR 10100

Übergeordnetes Werk:	Enthalten in: Chemosphere - Kidlington, Oxford : Elsevier Science, 1972, 133(2015), Seite 1-5
Übergeordnetes Werk:	volume:133 ; year:2015 ; pages:1-5

Links:	Volltext Link aufrufen

DOI / URN:	10.1016/j.chemosphere.2015.02.044

Katalog-ID:	OLC196306190X

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245	1	0	\|a Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China
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520			\|a The formation of unintentionally produced persistent organic pollutants (POPs) may occur during various chlorination processes. In this study, emissions of unintentionally produced POPs during the methanol-based production of chlorinated methanes were investigated. High concentrations of highly chlorinated compounds such as decachlorobiphenyl, octachloronaphthalene, octachlorostyrene, hexachlorobutadiene, hexachlorocyclopentadiene, hexachlorobenzene, and pentachlorobenzene were found in the carbon tetrachloride byproduct of the methanol-based production of chlorinated methanes. The total emission amounts of hexachlorocyclopentadiene, hexachlorobutadiene, polychlorinated benzenes, polychlorinated naphthalenes, octachlorostyrene, and polychlorinated biphenyls released during the production of chlorinated methanes in China in 2010 were estimated to be 10080, 7350, 5210, 427, 212, and 167 kg, respectively. Moreover, polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) were formed unintentionally during chlorinated methanes production, the emission factor for PCDDs/DFs was 364 μg toxic equivalency quotient (TEQ) t(-1) product for residues, which should be added into the UNEP toolkit for updating. It was worth noting that a high overall toxic equivalency quotient from polychlorinated naphthalenes and PCDDs/DFs was generated from the chlorinated methanes production in China in 2010. The values reached 563 and 32.8 g TEQ, respectively. The results of the study indicate that more research and improved management systems are needed to ensure that the methanol-based production of chlorinated methanes can be achieved safely.
540			\|a Nutzungsrecht: Copyright © 2015 Elsevier Ltd. All rights reserved.
650		4	\|a Methane - chemistry
650		4	\|a Environmental Pollutants - chemistry
650		4	\|a Methanol - chemistry
650		4	\|a Environmental Pollutants - analysis
700	1		\|a Yang, Wenlong \|4 oth
700	1		\|a Zhang, Linli \|4 oth
700	1		\|a Li, Xiaoxiu \|4 oth
773	0	8	\|i Enthalten in \|t Chemosphere \|d Kidlington, Oxford : Elsevier Science, 1972 \|g 133(2015), Seite 1-5 \|w (DE-627)129288586 \|w (DE-600)120089-6 \|w (DE-576)014470187 \|x 0045-6535 \|7 nnns
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856	4	1	\|u http://dx.doi.org/10.1016/j.chemosphere.2015.02.044 \|3 Volltext
856	4	2	\|u http://www.ncbi.nlm.nih.gov/pubmed/25777670
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allfields	10.1016/j.chemosphere.2015.02.044 doi PQ20160617 (DE-627)OLC196306190X (DE-599)GBVOLC196306190X (PRQ)c1911-ad8061efefd887108c0d77872a60ca97a3eca8ce61886ff44b3b8e986f514e2c0 (KEY)0012464820150000133000000001highlychlorinatedunintentionallyproducedpersistent DE-627 ger DE-627 rakwb eng 333.7 DNB AR 10100 AVZ rvk 38.32 bkl 35.00 bkl Zhang, Lifei verfasserin aut Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The formation of unintentionally produced persistent organic pollutants (POPs) may occur during various chlorination processes. In this study, emissions of unintentionally produced POPs during the methanol-based production of chlorinated methanes were investigated. High concentrations of highly chlorinated compounds such as decachlorobiphenyl, octachloronaphthalene, octachlorostyrene, hexachlorobutadiene, hexachlorocyclopentadiene, hexachlorobenzene, and pentachlorobenzene were found in the carbon tetrachloride byproduct of the methanol-based production of chlorinated methanes. The total emission amounts of hexachlorocyclopentadiene, hexachlorobutadiene, polychlorinated benzenes, polychlorinated naphthalenes, octachlorostyrene, and polychlorinated biphenyls released during the production of chlorinated methanes in China in 2010 were estimated to be 10080, 7350, 5210, 427, 212, and 167 kg, respectively. Moreover, polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) were formed unintentionally during chlorinated methanes production, the emission factor for PCDDs/DFs was 364 μg toxic equivalency quotient (TEQ) t(-1) product for residues, which should be added into the UNEP toolkit for updating. It was worth noting that a high overall toxic equivalency quotient from polychlorinated naphthalenes and PCDDs/DFs was generated from the chlorinated methanes production in China in 2010. The values reached 563 and 32.8 g TEQ, respectively. The results of the study indicate that more research and improved management systems are needed to ensure that the methanol-based production of chlorinated methanes can be achieved safely. Nutzungsrecht: Copyright © 2015 Elsevier Ltd. All rights reserved. Methane - chemistry Environmental Pollutants - chemistry Methanol - chemistry Environmental Pollutants - analysis Yang, Wenlong oth Zhang, Linli oth Li, Xiaoxiu oth Enthalten in Chemosphere Kidlington, Oxford : Elsevier Science, 1972 133(2015), Seite 1-5 (DE-627)129288586 (DE-600)120089-6 (DE-576)014470187 0045-6535 nnns volume:133 year:2015 pages:1-5 http://dx.doi.org/10.1016/j.chemosphere.2015.02.044 Volltext http://www.ncbi.nlm.nih.gov/pubmed/25777670 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OLC-DE-84 SSG-OPC-GGO GBV_ILN_21 GBV_ILN_70 GBV_ILN_4012 AR 10100 38.32 AVZ 35.00 AVZ AR 133 2015 1-5
spelling	10.1016/j.chemosphere.2015.02.044 doi PQ20160617 (DE-627)OLC196306190X (DE-599)GBVOLC196306190X (PRQ)c1911-ad8061efefd887108c0d77872a60ca97a3eca8ce61886ff44b3b8e986f514e2c0 (KEY)0012464820150000133000000001highlychlorinatedunintentionallyproducedpersistent DE-627 ger DE-627 rakwb eng 333.7 DNB AR 10100 AVZ rvk 38.32 bkl 35.00 bkl Zhang, Lifei verfasserin aut Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The formation of unintentionally produced persistent organic pollutants (POPs) may occur during various chlorination processes. In this study, emissions of unintentionally produced POPs during the methanol-based production of chlorinated methanes were investigated. High concentrations of highly chlorinated compounds such as decachlorobiphenyl, octachloronaphthalene, octachlorostyrene, hexachlorobutadiene, hexachlorocyclopentadiene, hexachlorobenzene, and pentachlorobenzene were found in the carbon tetrachloride byproduct of the methanol-based production of chlorinated methanes. The total emission amounts of hexachlorocyclopentadiene, hexachlorobutadiene, polychlorinated benzenes, polychlorinated naphthalenes, octachlorostyrene, and polychlorinated biphenyls released during the production of chlorinated methanes in China in 2010 were estimated to be 10080, 7350, 5210, 427, 212, and 167 kg, respectively. Moreover, polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) were formed unintentionally during chlorinated methanes production, the emission factor for PCDDs/DFs was 364 μg toxic equivalency quotient (TEQ) t(-1) product for residues, which should be added into the UNEP toolkit for updating. It was worth noting that a high overall toxic equivalency quotient from polychlorinated naphthalenes and PCDDs/DFs was generated from the chlorinated methanes production in China in 2010. The values reached 563 and 32.8 g TEQ, respectively. The results of the study indicate that more research and improved management systems are needed to ensure that the methanol-based production of chlorinated methanes can be achieved safely. Nutzungsrecht: Copyright © 2015 Elsevier Ltd. All rights reserved. Methane - chemistry Environmental Pollutants - chemistry Methanol - chemistry Environmental Pollutants - analysis Yang, Wenlong oth Zhang, Linli oth Li, Xiaoxiu oth Enthalten in Chemosphere Kidlington, Oxford : Elsevier Science, 1972 133(2015), Seite 1-5 (DE-627)129288586 (DE-600)120089-6 (DE-576)014470187 0045-6535 nnns volume:133 year:2015 pages:1-5 http://dx.doi.org/10.1016/j.chemosphere.2015.02.044 Volltext http://www.ncbi.nlm.nih.gov/pubmed/25777670 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OLC-DE-84 SSG-OPC-GGO GBV_ILN_21 GBV_ILN_70 GBV_ILN_4012 AR 10100 38.32 AVZ 35.00 AVZ AR 133 2015 1-5
allfields_unstemmed	10.1016/j.chemosphere.2015.02.044 doi PQ20160617 (DE-627)OLC196306190X (DE-599)GBVOLC196306190X (PRQ)c1911-ad8061efefd887108c0d77872a60ca97a3eca8ce61886ff44b3b8e986f514e2c0 (KEY)0012464820150000133000000001highlychlorinatedunintentionallyproducedpersistent DE-627 ger DE-627 rakwb eng 333.7 DNB AR 10100 AVZ rvk 38.32 bkl 35.00 bkl Zhang, Lifei verfasserin aut Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The formation of unintentionally produced persistent organic pollutants (POPs) may occur during various chlorination processes. In this study, emissions of unintentionally produced POPs during the methanol-based production of chlorinated methanes were investigated. High concentrations of highly chlorinated compounds such as decachlorobiphenyl, octachloronaphthalene, octachlorostyrene, hexachlorobutadiene, hexachlorocyclopentadiene, hexachlorobenzene, and pentachlorobenzene were found in the carbon tetrachloride byproduct of the methanol-based production of chlorinated methanes. The total emission amounts of hexachlorocyclopentadiene, hexachlorobutadiene, polychlorinated benzenes, polychlorinated naphthalenes, octachlorostyrene, and polychlorinated biphenyls released during the production of chlorinated methanes in China in 2010 were estimated to be 10080, 7350, 5210, 427, 212, and 167 kg, respectively. Moreover, polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) were formed unintentionally during chlorinated methanes production, the emission factor for PCDDs/DFs was 364 μg toxic equivalency quotient (TEQ) t(-1) product for residues, which should be added into the UNEP toolkit for updating. It was worth noting that a high overall toxic equivalency quotient from polychlorinated naphthalenes and PCDDs/DFs was generated from the chlorinated methanes production in China in 2010. The values reached 563 and 32.8 g TEQ, respectively. The results of the study indicate that more research and improved management systems are needed to ensure that the methanol-based production of chlorinated methanes can be achieved safely. Nutzungsrecht: Copyright © 2015 Elsevier Ltd. All rights reserved. Methane - chemistry Environmental Pollutants - chemistry Methanol - chemistry Environmental Pollutants - analysis Yang, Wenlong oth Zhang, Linli oth Li, Xiaoxiu oth Enthalten in Chemosphere Kidlington, Oxford : Elsevier Science, 1972 133(2015), Seite 1-5 (DE-627)129288586 (DE-600)120089-6 (DE-576)014470187 0045-6535 nnns volume:133 year:2015 pages:1-5 http://dx.doi.org/10.1016/j.chemosphere.2015.02.044 Volltext http://www.ncbi.nlm.nih.gov/pubmed/25777670 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OLC-DE-84 SSG-OPC-GGO GBV_ILN_21 GBV_ILN_70 GBV_ILN_4012 AR 10100 38.32 AVZ 35.00 AVZ AR 133 2015 1-5
allfieldsGer	10.1016/j.chemosphere.2015.02.044 doi PQ20160617 (DE-627)OLC196306190X (DE-599)GBVOLC196306190X (PRQ)c1911-ad8061efefd887108c0d77872a60ca97a3eca8ce61886ff44b3b8e986f514e2c0 (KEY)0012464820150000133000000001highlychlorinatedunintentionallyproducedpersistent DE-627 ger DE-627 rakwb eng 333.7 DNB AR 10100 AVZ rvk 38.32 bkl 35.00 bkl Zhang, Lifei verfasserin aut Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The formation of unintentionally produced persistent organic pollutants (POPs) may occur during various chlorination processes. In this study, emissions of unintentionally produced POPs during the methanol-based production of chlorinated methanes were investigated. High concentrations of highly chlorinated compounds such as decachlorobiphenyl, octachloronaphthalene, octachlorostyrene, hexachlorobutadiene, hexachlorocyclopentadiene, hexachlorobenzene, and pentachlorobenzene were found in the carbon tetrachloride byproduct of the methanol-based production of chlorinated methanes. The total emission amounts of hexachlorocyclopentadiene, hexachlorobutadiene, polychlorinated benzenes, polychlorinated naphthalenes, octachlorostyrene, and polychlorinated biphenyls released during the production of chlorinated methanes in China in 2010 were estimated to be 10080, 7350, 5210, 427, 212, and 167 kg, respectively. Moreover, polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) were formed unintentionally during chlorinated methanes production, the emission factor for PCDDs/DFs was 364 μg toxic equivalency quotient (TEQ) t(-1) product for residues, which should be added into the UNEP toolkit for updating. It was worth noting that a high overall toxic equivalency quotient from polychlorinated naphthalenes and PCDDs/DFs was generated from the chlorinated methanes production in China in 2010. The values reached 563 and 32.8 g TEQ, respectively. The results of the study indicate that more research and improved management systems are needed to ensure that the methanol-based production of chlorinated methanes can be achieved safely. Nutzungsrecht: Copyright © 2015 Elsevier Ltd. All rights reserved. Methane - chemistry Environmental Pollutants - chemistry Methanol - chemistry Environmental Pollutants - analysis Yang, Wenlong oth Zhang, Linli oth Li, Xiaoxiu oth Enthalten in Chemosphere Kidlington, Oxford : Elsevier Science, 1972 133(2015), Seite 1-5 (DE-627)129288586 (DE-600)120089-6 (DE-576)014470187 0045-6535 nnns volume:133 year:2015 pages:1-5 http://dx.doi.org/10.1016/j.chemosphere.2015.02.044 Volltext http://www.ncbi.nlm.nih.gov/pubmed/25777670 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OLC-DE-84 SSG-OPC-GGO GBV_ILN_21 GBV_ILN_70 GBV_ILN_4012 AR 10100 38.32 AVZ 35.00 AVZ AR 133 2015 1-5
allfieldsSound	10.1016/j.chemosphere.2015.02.044 doi PQ20160617 (DE-627)OLC196306190X (DE-599)GBVOLC196306190X (PRQ)c1911-ad8061efefd887108c0d77872a60ca97a3eca8ce61886ff44b3b8e986f514e2c0 (KEY)0012464820150000133000000001highlychlorinatedunintentionallyproducedpersistent DE-627 ger DE-627 rakwb eng 333.7 DNB AR 10100 AVZ rvk 38.32 bkl 35.00 bkl Zhang, Lifei verfasserin aut Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The formation of unintentionally produced persistent organic pollutants (POPs) may occur during various chlorination processes. In this study, emissions of unintentionally produced POPs during the methanol-based production of chlorinated methanes were investigated. High concentrations of highly chlorinated compounds such as decachlorobiphenyl, octachloronaphthalene, octachlorostyrene, hexachlorobutadiene, hexachlorocyclopentadiene, hexachlorobenzene, and pentachlorobenzene were found in the carbon tetrachloride byproduct of the methanol-based production of chlorinated methanes. The total emission amounts of hexachlorocyclopentadiene, hexachlorobutadiene, polychlorinated benzenes, polychlorinated naphthalenes, octachlorostyrene, and polychlorinated biphenyls released during the production of chlorinated methanes in China in 2010 were estimated to be 10080, 7350, 5210, 427, 212, and 167 kg, respectively. Moreover, polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) were formed unintentionally during chlorinated methanes production, the emission factor for PCDDs/DFs was 364 μg toxic equivalency quotient (TEQ) t(-1) product for residues, which should be added into the UNEP toolkit for updating. It was worth noting that a high overall toxic equivalency quotient from polychlorinated naphthalenes and PCDDs/DFs was generated from the chlorinated methanes production in China in 2010. The values reached 563 and 32.8 g TEQ, respectively. The results of the study indicate that more research and improved management systems are needed to ensure that the methanol-based production of chlorinated methanes can be achieved safely. Nutzungsrecht: Copyright © 2015 Elsevier Ltd. All rights reserved. Methane - chemistry Environmental Pollutants - chemistry Methanol - chemistry Environmental Pollutants - analysis Yang, Wenlong oth Zhang, Linli oth Li, Xiaoxiu oth Enthalten in Chemosphere Kidlington, Oxford : Elsevier Science, 1972 133(2015), Seite 1-5 (DE-627)129288586 (DE-600)120089-6 (DE-576)014470187 0045-6535 nnns volume:133 year:2015 pages:1-5 http://dx.doi.org/10.1016/j.chemosphere.2015.02.044 Volltext http://www.ncbi.nlm.nih.gov/pubmed/25777670 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OLC-DE-84 SSG-OPC-GGO GBV_ILN_21 GBV_ILN_70 GBV_ILN_4012 AR 10100 38.32 AVZ 35.00 AVZ AR 133 2015 1-5
language	English
source	Enthalten in Chemosphere 133(2015), Seite 1-5 volume:133 year:2015 pages:1-5
sourceStr	Enthalten in Chemosphere 133(2015), Seite 1-5 volume:133 year:2015 pages:1-5
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Methane - chemistry Environmental Pollutants - chemistry Methanol - chemistry Environmental Pollutants - analysis
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container_title	Chemosphere
authorswithroles_txt_mv	Zhang, Lifei @@aut@@ Yang, Wenlong @@oth@@ Zhang, Linli @@oth@@ Li, Xiaoxiu @@oth@@
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author	Zhang, Lifei
spellingShingle	Zhang, Lifei ddc 333.7 rvk AR 10100 bkl 38.32 bkl 35.00 misc Methane - chemistry misc Environmental Pollutants - chemistry misc Methanol - chemistry misc Environmental Pollutants - analysis Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China
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topic_title	333.7 DNB AR 10100 AVZ rvk 38.32 bkl 35.00 bkl Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China Methane - chemistry Environmental Pollutants - chemistry Methanol - chemistry Environmental Pollutants - analysis
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title	Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China
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title_full	Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China
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title_sort	highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: a case study in china
title_auth	Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China
abstract	The formation of unintentionally produced persistent organic pollutants (POPs) may occur during various chlorination processes. In this study, emissions of unintentionally produced POPs during the methanol-based production of chlorinated methanes were investigated. High concentrations of highly chlorinated compounds such as decachlorobiphenyl, octachloronaphthalene, octachlorostyrene, hexachlorobutadiene, hexachlorocyclopentadiene, hexachlorobenzene, and pentachlorobenzene were found in the carbon tetrachloride byproduct of the methanol-based production of chlorinated methanes. The total emission amounts of hexachlorocyclopentadiene, hexachlorobutadiene, polychlorinated benzenes, polychlorinated naphthalenes, octachlorostyrene, and polychlorinated biphenyls released during the production of chlorinated methanes in China in 2010 were estimated to be 10080, 7350, 5210, 427, 212, and 167 kg, respectively. Moreover, polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) were formed unintentionally during chlorinated methanes production, the emission factor for PCDDs/DFs was 364 μg toxic equivalency quotient (TEQ) t(-1) product for residues, which should be added into the UNEP toolkit for updating. It was worth noting that a high overall toxic equivalency quotient from polychlorinated naphthalenes and PCDDs/DFs was generated from the chlorinated methanes production in China in 2010. The values reached 563 and 32.8 g TEQ, respectively. The results of the study indicate that more research and improved management systems are needed to ensure that the methanol-based production of chlorinated methanes can be achieved safely.
abstractGer	The formation of unintentionally produced persistent organic pollutants (POPs) may occur during various chlorination processes. In this study, emissions of unintentionally produced POPs during the methanol-based production of chlorinated methanes were investigated. High concentrations of highly chlorinated compounds such as decachlorobiphenyl, octachloronaphthalene, octachlorostyrene, hexachlorobutadiene, hexachlorocyclopentadiene, hexachlorobenzene, and pentachlorobenzene were found in the carbon tetrachloride byproduct of the methanol-based production of chlorinated methanes. The total emission amounts of hexachlorocyclopentadiene, hexachlorobutadiene, polychlorinated benzenes, polychlorinated naphthalenes, octachlorostyrene, and polychlorinated biphenyls released during the production of chlorinated methanes in China in 2010 were estimated to be 10080, 7350, 5210, 427, 212, and 167 kg, respectively. Moreover, polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) were formed unintentionally during chlorinated methanes production, the emission factor for PCDDs/DFs was 364 μg toxic equivalency quotient (TEQ) t(-1) product for residues, which should be added into the UNEP toolkit for updating. It was worth noting that a high overall toxic equivalency quotient from polychlorinated naphthalenes and PCDDs/DFs was generated from the chlorinated methanes production in China in 2010. The values reached 563 and 32.8 g TEQ, respectively. The results of the study indicate that more research and improved management systems are needed to ensure that the methanol-based production of chlorinated methanes can be achieved safely.
abstract_unstemmed	The formation of unintentionally produced persistent organic pollutants (POPs) may occur during various chlorination processes. In this study, emissions of unintentionally produced POPs during the methanol-based production of chlorinated methanes were investigated. High concentrations of highly chlorinated compounds such as decachlorobiphenyl, octachloronaphthalene, octachlorostyrene, hexachlorobutadiene, hexachlorocyclopentadiene, hexachlorobenzene, and pentachlorobenzene were found in the carbon tetrachloride byproduct of the methanol-based production of chlorinated methanes. The total emission amounts of hexachlorocyclopentadiene, hexachlorobutadiene, polychlorinated benzenes, polychlorinated naphthalenes, octachlorostyrene, and polychlorinated biphenyls released during the production of chlorinated methanes in China in 2010 were estimated to be 10080, 7350, 5210, 427, 212, and 167 kg, respectively. Moreover, polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) were formed unintentionally during chlorinated methanes production, the emission factor for PCDDs/DFs was 364 μg toxic equivalency quotient (TEQ) t(-1) product for residues, which should be added into the UNEP toolkit for updating. It was worth noting that a high overall toxic equivalency quotient from polychlorinated naphthalenes and PCDDs/DFs was generated from the chlorinated methanes production in China in 2010. The values reached 563 and 32.8 g TEQ, respectively. The results of the study indicate that more research and improved management systems are needed to ensure that the methanol-based production of chlorinated methanes can be achieved safely.
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title_short	Highly chlorinated unintentionally produced persistent organic pollutants generated during the methanol-based production of chlorinated methanes: A case study in China
url	http://dx.doi.org/10.1016/j.chemosphere.2015.02.044 http://www.ncbi.nlm.nih.gov/pubmed/25777670
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