溶解有机碳
分馏
炭黑
碳纤维
dBc公司
环境化学
分数(化学)
化学
配体(生物化学)
化学工程
无机化学
材料科学
吸附
有机化学
工程类
物理
光学
复合数
复合材料
受体
天然橡胶
相位噪声
生物化学
作者
Yuping Ye,Zhaowei Wang,Lijuan Liu,Kemin Qi,Xiaofeng Xie
出处
期刊:Water Research
[Elsevier]
日期:2023-02-01
卷期号:229: 119410-119410
被引量:6
标识
DOI:10.1016/j.watres.2022.119410
摘要
As the most reactive and mobile fraction of black carbon, dissolved black carbon (DBC) inexorably interacts with minerals in the biosphere. Nevertheless, the research on the mechanisms and compositions of DBC assembly at the mineral-water interface remains limited. In this study, we revealed the “kinetic architecture” of DBC on iron oxyhydroxide at novel insights based on quantitative and qualitative approaches. The results indicated that high molecular weight, highly unsaturated, oxygen-rich (such as carboxyl-rich fraction, phenolics), aliphatics, and long C chains compounds were preferentially adsorbed on the iron oxyhydroxide. 2D-COS analyses directly disclosed the sequential fractionation: aromatic and phenolic groups > aliphatic groups, and few aromatics were continuously adsorbed after the rapid adsorption. Quantitative determinations identified that aromatic and phenolic components were adsorbed rapidly over the first 60 min, while aromatics achieved the dynamic equilibrium until ∼300 min, which was consistent with the 2D-COS observations. Our findings supported the hypothesis that “mineral-OM” and “OM-OM” interactions worked simultaneously, and the adsorption might be co-driven by ligand exchange, hydrophobic interactions, and other mechanisms. This work provided the theoretical basis for organic carbon storage and turnover, and it was valuable for predicting the behaviors and fates of contaminants at the soil-water interface and surface water.
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