期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 321, 期 -, 页码 111-120出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2016.09.009
关键词
Layered double hydroxides; Terephthalic acid; Pyromellitic acid; Aniline; Interaction mechanism
资金
- National Natural Science Foundation of China [91326202, 21577032, 21225730]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions
- Fundamental Research Funds for the Central Universities [JB2015001]
Aniline is toxic and hard to be degraded, and thereby causes the environmental pollution seriously. Herein, a practical and green hydrothermal method was applied to fabricate terephthalic acid and pyromellitic acid intercalated layered double hydroxides (LDH) (named as TAL and PAL) for aniline efficient removal. The sorption of aniline on LDH-based materials were investigated at different experimental conditions, and the results indicated that aniline sorption on LDH, TAL and PAL were strongly dependent on pH and independent of ionic strength. The maximum sorption capacities of aniline on TAL and PAL at pH 5.0 and 293 K were 90.4 and 130.0 mg/g, respectively, which were significantly higher than that of aniline on LDH (52.6 mg/g). Based on the BET, FFIR and XPS analysis, the higher sorption capacities of TAL and PAL were mainly due to high surface area and basal spacing as well as the abundant functional groups (e.g. -COO-). The interactions of aniline with TAL and PAL were mainly dominated by hydrogen bonds and electrostatic interactions. Such a facile synthesis method, efficient removal performance and superior reusability indicated that the aromatic acid modified LDH materials had potential application for efficient treatment of organic pollutants in environmental pollution cleanup. (C) 2016 Elsevier B.V. All rights reserved.
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