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	Photo- and thermo-chemical transformation of AgCl and Ag2S in environmental matrices and its implication
	Li, Yanbin; Jiang, Guibin; Liu, Jingfu; Yu, Sujuan; Guo, Xiaoru; Wang, Weidong; Tan, Zhiqiang; Xu, Wei; Yin, Yongguang
刊名	ENVIRONMENTAL POLLUTION
	2017-02-01
卷号	220期号:0页码:955-962
关键词	Silver Nanoparticle Agcl Ag2s Transformation Sunlight Incineration
英文摘要	AgCl and Ag2S prevalently exist in the environment as minerals and/or the chlorination and sulfidation products of ionic silver and elemental silver nanoparticles (AgNPs). In this work, we investigated the chemical transformation of AgCl and Ag2S under simulated sunlight (in water) and incineration (in sludge and simulated municipal solid waste, SMSW). In the presence of natural organic matter, AgCl in river water was observed to be transformed into AgNPs under simulated sunlight, while photo-reduction of Ag2S could not take place under the same experimental conditions. During the course of incineration, pure Ag2S was transformed into elemental silver while AgCl remained stable; however, both Ag2S in sludge and AgCl in SMSW can be transformed to elemental silver under incineration, evident by the results of X-ray absorption spectroscopy and scanning electron microscopy measurements. Incineration temperature played an important role in the transformation of Ag2S and AgCl into elemental silver. These results suggest that chemical transformations of Ag2S and AgCl into elemental silver could be a possible source of naturally occurring or unintentionally produced AgNPs, affecting the fate, transport, bioavailability and toxicity of silver. Therefore, it is necessary to include the contributions of this transformation process when assessing the risk of ionic silver/AgNPs and the utilization and management of incineration residues. (C) 2016 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39384]
专题	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
推荐引用方式 GB/T 7714	Li, Yanbin,Jiang, Guibin,Liu, Jingfu,et al. Photo- and thermo-chemical transformation of AgCl and Ag2S in environmental matrices and its implication[J]. ENVIRONMENTAL POLLUTION,2017,220(0):955-962.
APA	Li, Yanbin.,Jiang, Guibin.,Liu, Jingfu.,Yu, Sujuan.,Guo, Xiaoru.,...&Yin, Yongguang.(2017).Photo- and thermo-chemical transformation of AgCl and Ag2S in environmental matrices and its implication.ENVIRONMENTAL POLLUTION,220(0),955-962.
MLA	Li, Yanbin,et al."Photo- and thermo-chemical transformation of AgCl and Ag2S in environmental matrices and its implication".ENVIRONMENTAL POLLUTION 220.0(2017):955-962.

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