Layered double hydroxide intercalated with aromatic acid anions for the efficient capture of aniline from aqueous solution.
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 293K were 90.4 and 130.0mg/g, respectively, which were significantly higher than that of aniline on LDH (52.6mg/g). Based on the BET, FTIR 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.
School of Chemistry and Environment, North China Electric Power University, Beijing, 102206, PR China; Key Lab of New Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, Anhui, PR China.
Shujun
S
Yu
School of Chemistry and Environment, North China Electric Power University, Beijing, 102206, PR China; Key Lab of New Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, Anhui, PR China.
Xiangxue
X
Wang
School of Chemistry and Environment, North China Electric Power University, Beijing, 102206, PR China.
Zhongshan
Z
Chen
School of Chemistry and Environment, North China Electric Power University, Beijing, 102206, PR China.
Jian
J
Wang
School of Chemistry and Environment, North China Electric Power University, Beijing, 102206, PR China.
Suhua
S
Wang
NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan.
Tasawar
T
Hayat
School of Chemistry and Environment, North China Electric Power University, Beijing, 102206, PR China; NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, PR China. Electronic address: xkwang@ncepu.edu.cn.
Xiangke
X
Wang
Aniline; Interaction mechanism; Layered double hydroxides; Pyromellitic acid; Terephthalic acid