How properties of low molecular weight model competitors impact organic micropollutant adsorption onto activated carbon at realistically asymmetric concentrations
文献类型：期刊论文
| 作者 | Wang, Qi ; Mitchell, Raja-Louisa; Hofman, Roberta; Yu, Jianwei; Yang, Min; Rietveld, Luuk C.; Zietzschmann, Frederik
|
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2021-09-01 |
| 卷号 | 202页码:- |
| ISSN号 | 0043-1354 |
| 关键词 | Activated carbon Competitive adsorption Dissolved organic matter (DOM) Model compounds Complementary adsorption Adsorbability |
| 英文摘要 | Low molecular weight (LMW) dissolved organic matter (DOM) is the predominant competitor for adsorption sites against organic micropollutants (OMPs) in activated carbon adsorption. However, top-down approaches using highly complex mixtures of real water DOM do not allow to concisely examine the impacts of specific LMW DOM molecular properties on competitive adsorption. Therefore, we followed a bottom-up approach using fifteen model compounds (mDOM) to elucidate how important DOM characteristics, including hydrophobicity and unsaturated structures (ring, double/triple bond), impact competitiveness. Large concentration asymmetry (similar to 500 mu g DOC/mu g OMP) made mDOM compounds, which were overall less preferentially adsorbed than OMPs, become competitive against OMPs and inhibit OMP adsorption kinetics by pre-occupation of adsorption sites. Our results revealed that both hydrophobicity interactions and pi-interactions increased mDOM competitiveness, while pi-interactions outweighed hydrophobic interactions. However, pi-interactions could not be satisfactorily evaluated with a parameter such as specific ultraviolet absorbance (SUVA) due to interferences of carboxyl groups in aromatic mDOMs. Instead, mDOM adsorbability, described by mDOM adsorption capacity, proved to be a comprehensive indicator for mDOM competitiveness. To our knowledge, this is the first study that systematically clarifies the impacts of intricately interacting molecular properties on DOM adsorption and the related competition against OMP adsorption. DOM adsorbability may inspire a new fractionation, and assist the further isolation, identification and detailed characterization of LMW DOM competitors in real DOM-containing waters. |
| WOS研究方向 | Engineering, Environmental ; Environmental Sciences ; Water Resources |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46222]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 作者单位 | 1.Berliner Wasserbetriebe, Motardstr 35, D-13629 Berlin, Germany 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 4.Delft Univ Technol, Dept Water Management, POB 5048, NL-2600 GA Delft, Netherlands 5.Tech Univ Berlin, Chair Water Qual Control, KF4,Str 17 Juni 135, D-10623 Berlin, Germany 6.KWR Watercycle Res Inst, NL-3433 PE Nieuwegein, Netherlands |
| 推荐引用方式 GB/T 7714 | Wang, Qi,Mitchell, Raja-Louisa,Hofman, Roberta,et al. How properties of low molecular weight model competitors impact organic micropollutant adsorption onto activated carbon at realistically asymmetric concentrations[J]. WATER RESEARCH,2021,202:-. |
| APA | Wang, Qi.,Mitchell, Raja-Louisa.,Hofman, Roberta.,Yu, Jianwei.,Yang, Min.,...&Zietzschmann, Frederik.(2021).How properties of low molecular weight model competitors impact organic micropollutant adsorption onto activated carbon at realistically asymmetric concentrations.WATER RESEARCH,202,-. |
| MLA | Wang, Qi,et al."How properties of low molecular weight model competitors impact organic micropollutant adsorption onto activated carbon at realistically asymmetric concentrations".WATER RESEARCH 202(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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