Legacy and emerging per- and polyfluoroalkyl substances (PFAS) in sediments from the East China Sea and the Yellow Sea: Occurrence, source apportionment and environmental risk assessment
文献类型：期刊论文
| 作者 | Zhong, Hiufang; Zheng, Minggang; Liang, Yong; Wang, Yingjun ; Gao, Wei; Wang, Yawei; Jiang, Guibin
|
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2021 |
| 卷号 | 55期号:20页码:14258-14268 |
| 关键词 | mercury reduction microalgae re-oxidation associated bacteria |
| ISSN号 | 0013-936X |
| 英文摘要 | Redox transformation of mercury (Hg) is critical for Hg exchange at the air-sea interface and it can also affect the methylation of Hg in marine environments. However, the contributions of microalgae and aerobic bacteria in oxic seawater to Hg2+ reduction are largely unknown. Here, we studied the reduction of Hg2+ mediated by microalgae and aerobic bacteria in surface marine water and microalgae cultures under dark and sunlight conditions. The comparable reduction rates of Hg2+ with and without light suggest that dark reduction by biological processes is as important as photochemical reduction in the tested surface marine water and microalgae cultures. The contributions of microalgae, associated free-living aerobic bacteria, and extracellular substances to dark reduction were distinguished and quantified in 7 model microalgae cultures, demonstrating that the associated aerobic bacteria are directly involved in dark Hg2+ reduction. The aerobic bacteria in the microalgae cultures were isolated and a rapid dark reduction of Hg2+ followed by a decrease of Hg-0 was observed. The reduction of Hg2+ and re-oxidation of Hg-0 were demonstrated in aerobic bacteria Alteromonas spp. using double isotope tracing (Hg-199(2+) and Hg-201(0)). These findings highlight the importance of algae-associated aerobic bacteria in Hg transformation in oxic marine water. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/46809]  |
| 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 |
| 作者单位 | 1.Jianghan Univ, Inst Environm & Hlth, Hubei Key Lab Environm & Hlth Effects Persistent, Wuhan 430056, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 3.Minist Nat Resources, Inst Oceanog 1, Marine Ecol Res Ctr, Qingdao 266061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhong, Hiufang,Zheng, Minggang,Liang, Yong,et al. Legacy and emerging per- and polyfluoroalkyl substances (PFAS) in sediments from the East China Sea and the Yellow Sea: Occurrence, source apportionment and environmental risk assessment[J]. CHEMOSPHERE,2021,55(20):14258-14268. |
| APA | Zhong, Hiufang.,Zheng, Minggang.,Liang, Yong.,Wang, Yingjun.,Gao, Wei.,...&Jiang, Guibin.(2021).Legacy and emerging per- and polyfluoroalkyl substances (PFAS) in sediments from the East China Sea and the Yellow Sea: Occurrence, source apportionment and environmental risk assessment.CHEMOSPHERE,55(20),14258-14268. |
| MLA | Zhong, Hiufang,et al."Legacy and emerging per- and polyfluoroalkyl substances (PFAS) in sediments from the East China Sea and the Yellow Sea: Occurrence, source apportionment and environmental risk assessment".CHEMOSPHERE 55.20(2021):14258-14268. |
入库方式： OAI收割
来源：生态环境研究中心
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