Sunlight-driven reduction of silver ion to silver nanoparticle by organic matter mitigates the acute toxicity of silver to Daphnia magna
文献类型：期刊论文
| 作者 | Zhang, Zhen; Yang, Xiaoya; Shen, Mohai; Yin, Yongguang; Liu, Jingfu |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| 出版日期 | 2015-09-01 |
| 卷号 | 35页码:62-68 |
| 关键词 | Silver nanoparticle Silver ion Reduction Natural organic matter Acute toxicity Daphnia magna |
| 英文摘要 | Due to the unique antibacterial activities, silver nanoparticles (AgNPs) have been extensively used in commercial products. Anthropogenic activities have released considerable AgNPs as well as highly toxic silver ion (Ag+) into the aquatic environment. Our recent study revealed that ubiquitous natural organic matter (NOM) could reduce Ag+ to AgNP under natural sunlight. However, the toxic effect of this process is not well understood. In this work, we prepared mixture solution of Ag+ and AgNPs with varied Ag+% through the sunlight-driven reduction of Ag+ by NOM and investigated the acute toxicity of the solutions on Daphnia magna. Formation of AgNPs was demonstrated and characterized by comprehensive techniques and the fraction of unconverted Ag+ was determined by ultrafiltration-inductively coupled plasma mass spectrometry determination. The formation of AgNPs enhanced significantly with the increasing of solution pH and cumulative photosynthetically active radiation of sunlight. The toxicity of the resulting solution was further investigated by using freshwater crustacean D. magna as a model and an 8 hr-median lethal concentration (LC50) demonstrated that the reduction of Ag+ by NOM to AgNPs significantly mitigated the acute toxicity of silver. These results highlight the importance of sunlight and NOM in the fate, transformation and toxicity of Ag+ and AgNPs, and further indicate that the acute toxicity of AgNPs should be mainly ascribed to the dissolved Ag+ from AgNPs. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| 研究领域[WOS] | Environmental Sciences |
| WOS记录号 | WOS:000362982300008 |
| 公开日期 | 2016-03-15 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32671]  |
| 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 | Zhang, Zhen,Yang, Xiaoya,Shen, Mohai,et al. Sunlight-driven reduction of silver ion to silver nanoparticle by organic matter mitigates the acute toxicity of silver to Daphnia magna[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2015,35:62-68. |
| APA | Zhang, Zhen,Yang, Xiaoya,Shen, Mohai,Yin, Yongguang,&Liu, Jingfu.(2015).Sunlight-driven reduction of silver ion to silver nanoparticle by organic matter mitigates the acute toxicity of silver to Daphnia magna.JOURNAL OF ENVIRONMENTAL SCIENCES,35,62-68. |
| MLA | Zhang, Zhen,et al."Sunlight-driven reduction of silver ion to silver nanoparticle by organic matter mitigates the acute toxicity of silver to Daphnia magna".JOURNAL OF ENVIRONMENTAL SCIENCES 35(2015):62-68. |
入库方式： OAI收割
来源：生态环境研究中心
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