Pretreatment method for hypochlorite decon water before GC analysis of HD, VX, and GD

Active chlorine decontaminants like hypochlorite are used to destroy chemical warfare agents (CWAs) such as HD, VX and GD due to the former's strong oxidation capacity and high nucleophilicity. In this paper, experiments were performed to identify the main factors affecting agent recovery from...

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Autores principales:	Mengxue Xu, Lianyuan Wang, Haiyan Zhu, Hongpeng Zhang, Jing Liang, Xingang Wang, Zhenxing Cheng, Yuefeng Zhu
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	cwas extraction gc hypochlorite neutralization recovery Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/0642cd8e3c914a159975126037a446e9
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spelling	oai:doaj.org-article:0642cd8e3c914a159975126037a446e92021-11-06T10:51:14ZPretreatment method for hypochlorite decon water before GC analysis of HD, VX, and GD0273-12231996-973210.2166/wst.2021.034https://doaj.org/article/0642cd8e3c914a159975126037a446e92021-03-01T00:00:00Zhttp://wst.iwaponline.com/content/83/5/985https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Active chlorine decontaminants like hypochlorite are used to destroy chemical warfare agents (CWAs) such as HD, VX and GD due to the former's strong oxidation capacity and high nucleophilicity. In this paper, experiments were performed to identify the main factors affecting agent recovery from decon water. Based on the results, a method to recover residual CWAs from hypochlorite decon water before quantitative determination by GC was developed. The results showed that the extraction solvent was a critical determinant of high CWA recovery. Dichloromethane was more suitable than petroleum either, especially for samples containing GD or low residual CWAs. For VX-containing samples, the use of an alkali solution improved VX recovery. Neutralization was also important for a high CWA recovery, especially for samples with low CWA concentrations and/or strong decontaminant reactivity. The use of 15% sodium sulfite as the neutralization solution gave the best results for hypochlorite decon water. When the optimized conditions of simultaneous sodium sulfite neutralization and dichloromethane extraction were used, the recovery of HD, VX and GD in hypochlorite decon water was greater than 85% at a concentration range of 20 mg/L to 10,000 mg/L.Mengxue XuLianyuan WangHaiyan ZhuHongpeng ZhangJing LiangXingang WangZhenxing ChengYuefeng ZhuIWA PublishingarticlecwasextractiongchypochloriteneutralizationrecoveryEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 5, Pp 985-992 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cwas extraction gc hypochlorite neutralization recovery Environmental technology. Sanitary engineering TD1-1066
spellingShingle	cwas extraction gc hypochlorite neutralization recovery Environmental technology. Sanitary engineering TD1-1066 Mengxue Xu Lianyuan Wang Haiyan Zhu Hongpeng Zhang Jing Liang Xingang Wang Zhenxing Cheng Yuefeng Zhu Pretreatment method for hypochlorite decon water before GC analysis of HD, VX, and GD
description	Active chlorine decontaminants like hypochlorite are used to destroy chemical warfare agents (CWAs) such as HD, VX and GD due to the former's strong oxidation capacity and high nucleophilicity. In this paper, experiments were performed to identify the main factors affecting agent recovery from decon water. Based on the results, a method to recover residual CWAs from hypochlorite decon water before quantitative determination by GC was developed. The results showed that the extraction solvent was a critical determinant of high CWA recovery. Dichloromethane was more suitable than petroleum either, especially for samples containing GD or low residual CWAs. For VX-containing samples, the use of an alkali solution improved VX recovery. Neutralization was also important for a high CWA recovery, especially for samples with low CWA concentrations and/or strong decontaminant reactivity. The use of 15% sodium sulfite as the neutralization solution gave the best results for hypochlorite decon water. When the optimized conditions of simultaneous sodium sulfite neutralization and dichloromethane extraction were used, the recovery of HD, VX and GD in hypochlorite decon water was greater than 85% at a concentration range of 20 mg/L to 10,000 mg/L.
format	article
author	Mengxue Xu Lianyuan Wang Haiyan Zhu Hongpeng Zhang Jing Liang Xingang Wang Zhenxing Cheng Yuefeng Zhu
author_facet	Mengxue Xu Lianyuan Wang Haiyan Zhu Hongpeng Zhang Jing Liang Xingang Wang Zhenxing Cheng Yuefeng Zhu
author_sort	Mengxue Xu
title	Pretreatment method for hypochlorite decon water before GC analysis of HD, VX, and GD
title_short	Pretreatment method for hypochlorite decon water before GC analysis of HD, VX, and GD
title_full	Pretreatment method for hypochlorite decon water before GC analysis of HD, VX, and GD
title_fullStr	Pretreatment method for hypochlorite decon water before GC analysis of HD, VX, and GD
title_full_unstemmed	Pretreatment method for hypochlorite decon water before GC analysis of HD, VX, and GD
title_sort	pretreatment method for hypochlorite decon water before gc analysis of hd, vx, and gd
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/0642cd8e3c914a159975126037a446e9
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_version_	1718443712147619840

Pretreatment method for hypochlorite decon water before GC analysis of HD, VX, and GD

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