title: Adsorption of benzotriazole and benzimidazole from water over a Co-based metal azolate framework MAF-5(Co).
abstract: Benzotriazole (BTA) and benzimidazole (BZI) are regarded as water pollutants because of their extensive uses in industry and appreciable water solubility. The adsorption of both BTA and BZI from water over a newly synthesized metal-organic framework, MAF-5(Co), was investigated and compared with zeolitic imidazole frameworks (ZIFs), such as ZIF-8(Zn) and ZIF-67(Co), as well as commercial activated carbon. MAF-5(Co) had the highest adsorption capacities for both BTA and BZI. The maximum adsorption capacities of MAF-5(Co) for BTA and BZI were 389 and 175mgg-1, respectively. Hydrophobic and π-π interactions between the aromatic adsorbate BTA and MAF-5(Co) were suggested as a plausible mechanism. Based on the zeta potential of MAF-5(Co) and effects of pH on the BTA adsorption, electrostatic interactions between the MAF-5(Co) and BTA species might also affect the adsorption of BTA over MAF-5(Co). MAF-5(Co) can be recycled for adsorptive removal of BTA by simple ethanol washing. Therefore, MAF-5(Co) is suggested as a promising adsorbent for the removal of BTA and BZI from water.
authors: Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.
authors: Mithun
authors: M
authors: Sarker
authors: Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.
authors: Biswa Nath
authors: BN
authors: Bhadra
authors: Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.
authors: Pill Won
authors: PW
authors: Seo
authors: Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Republic of Korea. Electronic address: sung@knu.ac.kr.
authors: Sung Hwa
authors: SH
authors: Jhung
keywords: Adsorption; Benzimidazole; Benzotriazole; MAF-5(Co); Water purification