Adsorption and decolorization study of reactive black 5 by immobilized metal-organic framework of UiO-66 and Gloeophyllum trabeum fungus

Taufiq Rinda Alkas; Adi Setyo Purnomo; Ratna Ediati; Taslim Ersam

doi:10.1039/d3ra03804a

Adsorption and decolorization study of reactive black 5 by immobilized metal-organic framework of UiO-66 and Gloeophyllum trabeum fungus

RSC Adv. 2023 Oct 20;13(44):30885-30897. doi: 10.1039/d3ra03804a. eCollection 2023 Oct 18.

Authors

Taufiq Rinda Alkas¹, Adi Setyo Purnomo², Ratna Ediati², Taslim Ersam²

Affiliations

¹ Departement of Environment Management, Politeknik Pertanian Negeri Samarinda Samarinda 75131 Indonesia.
² Department of Chemistry, Institut Teknologi Sepuluh Nopember (ITS) Surabaya 60111 Indonesia adi_setyo@chem.its.ac.id.

Abstract

This study aimed to investigate immobilized metal-organic framework (MOF) UiO-66 and brown-rot fungus Gloeophyllum trabeum (GT) in PVA-SA matrices for adsorption and decolorization of reactive black 5 (RB5). Furthermore, UiO-66/GT@PVA-SA composite was successfully fabricated and obtained by immobilizing UiO-66 and GT mycelia into a mixture of PVA-SA. This composite demonstrated a decolorization ability of 80.12% for RB5 after 7 days. The composite's reusability was assessed for three cycles; at last, it only achieved 21%. This study reported that adsorption of RB5 by the composite followed a pseudo-second-order kinetic model with a correlation coefficient (R²) of 0.9997. The Freundlich model was found to be suitable for the isotherm adsorption. The process was also spontaneous and feasible, as indicated by the negative ΔG value. Subsequently, four metabolite products resulting from decolorization of RB5 by UiO-66/GT@PVA-SA composite were proposed, namely: C₂₄H₁₉N₅Na₂O₁₃S₄ (m/z = 762), C₁₀H₁₃N₂O₈S₂^- (m/z = 353), C₁₂H₉N₄O₇S₂^- (m/z = 384), and C₁₀H₁₃O₈S₂^- (m/z = 325).