Abiotic formation of organoiodine compounds by manganese dioxide induced iodination of dissolved organic matter
文献类型：期刊论文
| 作者 | Hao, Zhineng ; Wang, Juan; Yin, Yongguang; Cao, Dong; Liu, Jingfu
|
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2018-05-01 |
| 卷号 | 236页码:672-679 |
| 关键词 | Organoiodine compounds (OICs) Manganese oxide (delta-MnO2) Dissolved organic matter (DOM) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) |
| ISSN号 | 0269-7491 |
| 文献子类 | Article |
| 英文摘要 | Iodination of dissolved organic matter (DOM) initiated by manganese oxide may represent an important source of organoiodine compounds (OICs) for iodide-containing waters. Here, Suwannee River natural organic matter was selected as model DOM, the OICs formation in simulated freshwater samples from iodinated DOM induced by manganese oxide (delta-MnO2) was investigated at different pHs and concentrations of iodide and delta-MnO2 by using negative ion electrospray ionization coupled with Fourier transform ion cyclotron resonance mass spectrometry (ESI-FT-ICR MS). While no OIC was observed in DOM control samples without delta-MnO2, hundreds of OICs were detected in the presence of delta-MnO2, suggesting the enhanced role of delta-MnO2 played in DOM iodination. The relative abundance was defined as the value of dividing the peak intensity of OICs by the highest m/z peak intensity constantly occurred in each mass spectrum, and selected as a parameter for partly reflecting the real level of OICs. The relative abundance of most OICs were around or greater than 1%, and several OICs with higher relative abundance were identified as diiodo-5-hydroxy-4-cyclopentene-1,3-dione, diiodomethane and diiodoacetic acid. The numbers of the formed OICs increased with the increase concentrations of iodide/delta-MnO2 and the decrease of pH, and nearly all OICs formed at lower levels of iodide/delta-MnO2 and/or higher pH were overlapped by that at higher levels of iodide/delta-MnO2 and/or lower pH, indicating the reliability of FT-ICR MS analysis techniques and data processing method. The OICs were formed mainly from the iodination of typical lignin-like and tannin-like compounds, as well as the precursor compounds with higher relative abundance through substitution reactions. Our findings demonstrate that the OICs formation by delta-MnO2-initiated DOM iodination should receive more attention and the concentration, exact structure and toxicity of the OICs need to be further investigated. (C) 2018 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/40867]  |
| 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 | Hao, Zhineng,Wang, Juan,Yin, Yongguang,et al. Abiotic formation of organoiodine compounds by manganese dioxide induced iodination of dissolved organic matter[J]. ENVIRONMENTAL POLLUTION,2018,236:672-679. |
| APA | Hao, Zhineng,Wang, Juan,Yin, Yongguang,Cao, Dong,&Liu, Jingfu.(2018).Abiotic formation of organoiodine compounds by manganese dioxide induced iodination of dissolved organic matter.ENVIRONMENTAL POLLUTION,236,672-679. |
| MLA | Hao, Zhineng,et al."Abiotic formation of organoiodine compounds by manganese dioxide induced iodination of dissolved organic matter".ENVIRONMENTAL POLLUTION 236(2018):672-679. |
入库方式： OAI收割
来源：生态环境研究中心
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