期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 335, 期 -, 页码 162-169出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2017.04.044
关键词
Adsorption; Hydrogen bonding; MIL-101(OH)(3); Phenylarsonic acid; p-Arsanilic acid
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2015R1A2A1A15055291]
- National Research Foundation of Korea [2015R1A2A1A15055291] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Organic arsenic acids (OAAs) are regarded as water pollutants because of their toxicity and considerable solubility in water. Adsorption of OAAs such as phenylarsonic acid (PAA) and p-arsanilic acid (ASA) from water was investigated over functionalized (with OH groups) metal-organic framework (MOF, MIL-101), as well as over pristine MIL-101 and commercial activated carbon. The highly porous MIL-101 bearing three hydroxyl groups (MIL-101(OH)(3)) exhibited remarkable PAA and ASA adsorption capacities. Based on the effects of pH on PAA and ASA adsorption, hydrogen bonding was suggested as a plausible mechanism of OAA adsorption. Importantly, OAAs and MIL-101(OH)(3) can be viewed as hydrogen-bond acceptors and donors, respectively. Moreover, MIL-101(OH)(3) could be regenerated by acidic ethanol treatment, being a promising adsorbent for the removal of PAA and ASA from water. (C) 2017 Elsevier B.V. All rights reserved.
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