The chemodiversity of algal dissolved organic matter from lysed Microcystis aeruginosa cells and its ability to form disinfection by-products during chlorination
The chemodiversity of algal dissolved organic matter from lysed Microcystis aeruginosa cells and its ability to form disinfection by-products during chlorination
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DOI：
10.1016/j.watres.2019.02.030
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发表时间：
2019-05-15
期刊：
影响因子：
12.8
通讯作者：
Schmitt-Kopplin, Philippe
中科院分区：
文献类型：
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作者：
Gonsior, Michael;Powers, Leanne C.;Schmitt-Kopplin, Philippe
以铜绿微囊藻裂解细胞中的藻源溶解有机物(ADOM)为前驱物，经游离氯消毒后形成消毒副产物。非靶向超高分辨率12T负模电喷雾电离傅立叶变换离子回旋共振质谱仪(FT-ICR-MS)显示铜绿微囊藻的固相萃取组分和电离组分具有较高的分子多样性。游离氯能有效降解微囊藻毒素LR，达到了预期的效果。然而，我们发现，在ADOM的水溶和固相可提取部分中添加游离氯，以及在丰富和已知的不饱和脂肪酸中添加双键部分，会产生高度多样化的消毒副产物。已知的铜绿微囊藻代谢产物中没有芳香族DOM前体，也没有发现芳香族消毒副产物(DBPs)的证据，尽管含有N化合物。氯化后观察到大量不同的含氮分子式，这似乎预示着较大多肽的分解和氧化。此外，还观察到一组具有推测的氯胺官能团的N-化合物。这项研究强调了评估ADOM及其形成不同DBP的能力的重要性，并将其与异地或陆源DOM进行比较。(C)2019年提交人(S)。爱思唯尔有限公司出版。
Algal-derived dissolved organic matter (ADOM) originating from lysed Microcystis aeruginosa cells was investigated as precursor material to form disinfection by-products upon disinfection with free chlorine. Non-targeted ultrahigh resolution 12 T negative mode electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) revealed high molecular diversity in solid-phase extracted and ionizable components of Microcystis aeruginosa ADOM. The toxin microcystin LR was effectively degraded by free chlorine, which was expected. However, we found a high diversity of disinfection by-products associated with the addition of free chlorine to the water-soluble and solid-phase extractable fraction of ADOM and of double-bond moieties in abundant and known unsaturated fatty acids. Aromatic DOM precursors were absent from known metabolites of Microcystis aeruginosa and no evidence for aromatic disinfection by-products (DBPs) was found, despite N-containing compounds. A large diversification of N-containing molecular formulas was observed after chlorination, which seems indicative for the breakdown and oxidation of larger peptides. Additionally, a diverse group of N-compounds with presumed chloramine functional groups was observed. This study highlights the importance to evaluate ADOM and its ability to form different DBPs when compared to allochthonous or terrestrially-derived DOM. (C) 2019 The Author(s). Published by Elsevier Ltd.