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芳香溶解有机物如何在竞争力上与有机微污染物吸附不同

Qi Wang^1,2, Oliver J Lechtenfeld^3,4, Luuk C Rietveld²

¹Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 100085, Beijing, China.

Environmental science and ecotechnology

|March 4, 2024

概括

溶解有机物 (DOM) 竞争阻碍了有机微污染物 (OMP) 的活性碳去除. 非极性,中度芳香DOM分数是最具竞争力的,极性抵消高芳香度,挑战基于芳香度的简单预测.

科学领域:

环境化学环境化学
水处理技术水处理技术
分析化学分析化学

背景情况:

活性炭有效地从水中去除有机微污染物 (OMP).
通过溶解有机物 (DOM) 的竞争性吸附显著降低了OMP的去除效率.
了解DOM特征对于预测自然水域中的OMP吸附至关重要.

研究的目的:

调查芳香度和极性对低分子量 (LMW) DOM竞争力的联合影响.
评估基于芳香度的指标的局限性,以预测DOM竞争.
阐明在分数和化合物水平上支配DOM竞争力的分子性质.

主要方法:

直接样本注射液体色谱与超高分辨率的里埃变换离子循环子子共振质谱学 (LC-FTICR-MS) 相结合.
离子交换树脂预处理以分成DOM.
对DOM组件的分子表征和同位素级分析.

主要成果:

离子交换树脂去除了93%的UV254活性DOM,但最小限度地减少了竞争.
发现中等芳香度的非极性DOM分数是最具竞争力的.
增加的极性抵消了高度芳香的LMW DOM的竞争力,限制了水友化合物的π-π相互作用.

结论:

仅仅是芳香性就不足以解释DOM竞争力;极性起着至关重要的平衡作用.
面向效果的DOM分析揭示了分子性质之间的复杂相互作用.
这项研究强调,需要采用微妙的方法来根据DOM特征预测OMP吸附.

关键词:

活性炭是一种活性炭.溶解有机物 (DOM) 是一种有机物.里叶变换离子循环子共振质谱法 (FT-ICR-MS)多元组件吸附方式多元组件吸附方式有机微污染物有机微污染物

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