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231224s2013 xx |||||o 00| ||eng c |
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|a 10.2166/wst.2013.536
|2 doi
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|a pubmed25n0778.xml
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|a DE-627
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|a eng
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|a Xue, Honghai
|e verfasserin
|4 aut
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|a The photoconversion of gamma-hexachlorocyclohexane under UV irradiation in water, snow and ice
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|c 2013
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 18.03.2014
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|a Date Revised 02.12.2018
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|a published: Print
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|a Citation Status MEDLINE
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|a The photochemistry of organic pollutants has received increasing attention in ice and snow. In this work, the photoconversion of gamma-hexachlorocyclohexane (γ-HCH) under UV irradiation was investigated in water, snow and ice. The photoconversion rate, products and mechanisms were inspected, and the effect of inorganic ions (NO2(-), NO3(-), HCO3(-) and Fe(2+)) was discussed. The results showed that γ-HCH could be photoconverted in water, snow and ice, with the photoconversion rate being fastest in snow, and slowest in ice. All photoconversion could be described by the first-order kinetics model. In water, snow and ice, the common photoproducts of γ-HCH were alpha-hexachlorocyclohexane (α-HCH) and pentachlorocyclohexene. α-HCH was generated by a change in the bonding of a chlorine atom in γ-HCH; pentachlorocyclohexene was generated by the removal of a molecule of chlorine hydride from a molecule of γ-HCH. Different concentrations of NO2(-), NO3(-) and HCO3(-) all inhibited the photoconversion of γ-HCH, and the inhibition effect decreased with increasing concentrations of NO2(-) and NO3(-), but increased with the increasing concentrations of HCO3(-). Different concentrations of Fe(2+) promoted the photoconversion of γ-HCH in water and ice, but had little effect in snow
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|a Journal Article
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|a Environmental Pollutants
|2 NLM
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|a Ice
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|a Hexachlorocyclohexane
|2 NLM
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|a 59NEE7PCAB
|2 NLM
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|a Tang, Xiaojian
|e verfasserin
|4 aut
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|a Kang, Chunli
|e verfasserin
|4 aut
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|a Liu, Jia
|e verfasserin
|4 aut
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|a Shi, Lei
|e verfasserin
|4 aut
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|a Wang, Hongliang
|e verfasserin
|4 aut
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|a Yang, Ting
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Water science and technology : a journal of the International Association on Water Pollution Research
|d 1986
|g 68(2013), 11 vom: 11., Seite 2479-84
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|x 0273-1223
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|g volume:68
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|g pages:2479-84
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|u http://dx.doi.org/10.2166/wst.2013.536
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