Metal-phenolic network-coated RGO for malachite green adsorption

Sucitro, Clarissa and Priliana, Veronika (2022) Metal-phenolic network-coated RGO for malachite green adsorption. Working Paper (Laporan Penelitian Laboratorium (FT-Kimia)). Faculty of Engineering, Surabaya. (Submitted)

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Malachite green (MG) is one of dyes commonly found in wastewater of textile industries. Since the presence of MG is harmful for living organisms. Adsorption is considered as the most method widely investigated since the process is simple and brings advantageous in term of its applicability. Composite of MPN (metal-phenolic network)/RGO (reduced graphene oxide) has been selected as adsorbent to adsorb MG. The aims of the study were to study the preparation of MPN/RGO to determine the adsorption capacity of MPN/RGO toward MG dye as the selected adsorbate, and to investigate the kinetic, isotherm, and thermodynamic study for MG adsorption over MPN/RGO. Kaffir lime peels extract was used as the reducing agent of GO. MPN/RGO itself was prepared by two different methods by changing the alter of chemicals added during the preparation. In method I, RGO was prepared first, followed by coating it with MPN. In method II, MPN was firstly coated on GO, then MPN-coated GO was reduced by kaffir lime peels extract. SEM-EDX analysis showed that the % atomic weight of O and Fe in MPN/RGO method I was lower than in MPN/RGO method II. FTIR analysis shows that MPN/RGO method I losses hydroxyl, alkoxy, and epoxy functional groups, indicating the successful of reduction process. Whilst on the surface of MPN/RGO indicates part of these groups are still bound which means the GO reduction process is occurred partially. However, the adsorption study shows both adsorbent performed similar achievement by removing around 95% of dye for the same adsorption conditions. The adsorption kinetic were also studied and pseudo-second order adsorption phenomena was confirmed. The intraparticle diffusion model shows that the adsorption process is controlled by surface adsorption. The adsorption capacity based on the Langmuir isotherm for MPN/RGO method I and II are 349 and 360 mg/g, respectively. Thermodynamics approach for MG adsorption over MPN/RGO suggests that MG adsorption occurs spontaneously and endothermic. The recyclability of MPN/RGO sample is interesting to be further investigated to seek a candidate adsorbent applied in textile-based industries.

Item Type: Monograph (Working Paper (Laporan Penelitian Laboratorium (FT-Kimia)))
Department: S1 - Teknik Kimia
Thesis advisor
Irawaty, Wenny
Thesis advisor
Santoso, Shella Permatasari
Subjects: Engineering
Engineering > Chemical Engineering
Divisions: Faculty of Engineering > Chemical Engineering Study Program
Depositing User: Users 10363 not found.
Date Deposited: 11 Apr 2022 08:14
Last Modified: 11 Apr 2022 08:14

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