Particle-Bound Hg(II) is Available for Microbial Uptake as Revealed by a Whole-Cell Biosensor
文献类型：期刊论文
| 作者 | Xiang, Yuping ; Guo, Yingying; Liu, Guangliang; Liu, Yanwei; Song, Maoyong; Shi, Jianbo; Hu, Ligang; Yin, Yongguang; Cai, Yong; Jiang, Guibin
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| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
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| 出版日期 | 2022-05-17 |
| 卷号 | 56期号:10页码:6754-6764 |
| 关键词 | DISSOLVED ORGANIC-MATTER ESCHERICHIA-COLI MERCURY BIOAVAILABILITY AQUATIC ENVIRONMENT DEMETHYLATION RATES OXIDE NANOPARTICLES BACTERIAL ADHESION TRACE-ELEMENTS WATER COLUMN METHYLATION |
| ISSN号 | 0013-936X |
| 英文摘要 | Particle-bound mercury (HgP), ubiquitously present in aquaticenvironments, can be methylated into highly toxic methylmercury, but itremains challenging to assess its bioavailability. In this study, we developed anEscherichia coli-based whole-cell biosensor to probe the microbial uptake ofinorganic Hg(II) and assess the bioavailability of HgPsorbed on natural andmodel particles. This biosensor can quantitatively distinguish thecontribution of dissolved Hg(II) and HgPto intracellular Hg. Resultsshowed that the microbial uptake of HgPwas ubiquitous in the environment,as evidenced by the bioavailability of sorbed-Hg(II) onto particulate matterand model particles (Fe2O3,Fe3O4,Al2O3, and SiO2). In both oxic and anoxicenvironments, HgPwas an important Hg(II) source for microbial uptake,with enhanced bioavailability under anoxic conditions. The composition ofparticles significantly affected the microbial uptake of HgP, with higher bioavailability being observed for Fe2O3and lower for Al2O3particles. The bioavailability of HgPvaried also with the size of particles. In addition, coating with humic substances and modelorganic compound (cysteine) on Fe2O3particles decreased the bioavailability of HgP. Overall, ourfindings highlight the role of HgPin Hg biogeochemical cycling and shed light on the enhanced Hg-methylation in settling particles and sediments in aquatic environments |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47664]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 通讯作者 | Yin, Yongguang |
| 作者单位 | 1.Jianghan Univ, Inst Environm & Hlth, Wuhan 430056, Peoples R China 2.Florida Int Univ, Dept Chem & Biochem, Miami, FL 33199 USA 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Lab Environm Nanotechnol & Hlth Effect, Beijing 100085, Peoples R China 4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiang, Yuping,Guo, Yingying,Liu, Guangliang,et al. Particle-Bound Hg(II) is Available for Microbial Uptake as Revealed by a Whole-Cell Biosensor[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022,56(10):6754-6764. |
| APA | Xiang, Yuping.,Guo, Yingying.,Liu, Guangliang.,Liu, Yanwei.,Song, Maoyong.,...&Jiang, Guibin.(2022).Particle-Bound Hg(II) is Available for Microbial Uptake as Revealed by a Whole-Cell Biosensor.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56(10),6754-6764. |
| MLA | Xiang, Yuping,et al."Particle-Bound Hg(II) is Available for Microbial Uptake as Revealed by a Whole-Cell Biosensor".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56.10(2022):6754-6764. |
入库方式： OAI收割
来源：生态环境研究中心
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