Removal of selected endocrine-disrupting compounds using Al-based metal organic framework: Performance and mechanism of competitive adsorption

Byung Moon Jun, Hong Seop Hwang, Jiyong Heo, Jonghun Han, Min Jang, Jinsik Sohn, Chang Min Park, Yeomin Yoon

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Abstract

Endocrine disrupting compounds (EDCs) present serious environmental problems due to their negative impacts on lifeforms. To solve these issues, a metal–organic frameworks (MOF) was used as an efficient adsorbent for the removal of EDCs. This work was mainly conducted to (i) characterize the adsorbent, (ii) establish the feasibility of MOF for removal of the selected EDCs (bisphenol A (BPA), 17α-ethynylestradiol (EE2), and perfluorooctanoic acid (PFOA)), and (iii) study the competitive adsorption mechanism. Physicochemical properties of MOF were characterized by microscopy, porosimetry, and zeta potential analyses. Feasibility testing of MOF was conducted under various solution conditions to determine the effect of solution temperature, pH, background ions, and humic acid on the adsorption capacity. The adsorption process in this study was spontaneous reaction, considering the negative value of ΔG0 derived from experiments of solution temperature. According to experimental results related to the adsorbent dose, the maximum equilibrium adsorption capacity (qe) for BPA, EE2, and PFOA by MOF was 138.4, 200.4, and 169.2 mg g−1, respectively. The adsorption mechanism of the EDCs was clearly explained by numerous solution factors (i.e., pH, background ions, and the existence of humic acid), and synergetic effects of hydrophobic and electrostatic interactions were important to explain the adsorption mechanism.

Original languageEnglish
Pages (from-to)345-352
Number of pages8
JournalJournal of Industrial and Engineering Chemistry
Volume79
DOIs
StatePublished - 25 Nov 2019

Bibliographical note

Funding Information:
This research was supported by the Korea Ministry of Environment (The SEM projects; 2018002470005, South Korea). This research was also supported by the Korea Environment Industry & Technology Institute (KEITI) through Plant Research Program, funded by Korea Ministry of Environment (MOE) (1485016267, South Korea). The authors would also like to thank KBSI at Daegu for SEM-EDS and TEM measurements.

Funding Information:
This research was supported by the Korea Ministry of Environment (The SEM projects; 2018002470005 , South Korea). This research was also supported by the Korea Environment Industry & Technology Institute (KEITI) through Plant Research Program, funded by Korea Ministry of Environment ( MOE ) ( 1485016267 , South Korea). The authors would also like to thank KBSI at Daegu for SEM-EDS and TEM measurements.

Publisher Copyright:
© 2019 The Korean Society of Industrial and Engineering Chemistry

Keywords

  • Competitive adsorption
  • Endocrine disrupting compounds
  • Mechanism
  • Metal–organic frameworks
  • Water treatment

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