PRELIMINARY ASSESSMENT OF GRINDING CHIPS WITH CORE-SHELL STRUCTURE AS FENTON CATALYST FOR WASTEWATER TREATMENT

• Main Author: Rasheeda, Aysha
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/41530
• Institution: Institut Teknologi Bandung

The inefficiency of the coloring in textile process generates large amounts of dye residues, resulting in direct release if dyes into water, thus contaminating the environment. Among the residues that pollute the environment, there are large quantities of azo dyes that are discharged. Advanced Oxidation Processes (AOPs), have receive special attention due its ability to generate strong oxidizing hydroxyl radicals that will degrade the organic dyes into chemicals such as CO2 and H2O. Among the AOPs, Fenton reaction is an interesting alternative because it holds significant advantages such as high degradation efficiency, simplicity of technology, low cost process, and general applicability. However, the narrow working pH range (2.5 – 4) has limit the application of homogeneous Fenton reaction. The process also results in the accumulation of ferric oxide sludge. Various heterogeneous Fenton catalysts have been studied, however, their oxidation efficiencies at pH above 4 are far from satisfactory. Therefore, it is of great importance to develop new Fenton system with high oxidation efficiency and wider working pH range. The present study investigated the use of often-neglected waste of grinding chips, with the hypothesis that it will create a core-shell structure Fenton than can enhanced the Fe(III)/Fe(II) cycles of Fenton system, and the grinding chips ability to catalytically degrade dye, using methylene blue dye waste model, was studied and compared to the synthesized Fe3O4 heterogeneous Fenton. SEM and XRD result revealed that the grinding chips particle result in spherical morphology with Fe/Fe2O3 core-shell structure. The visual observation and UV-Vis result indicate that the optimum Fe/Fe2O3 core-shell concentration in this current study is 0.09% (w/v) and it has better catalytic degradation ability compared to Fe3O4 heterogeneous Fenton.