The Role of Acid Catalysts in Optimizing Iron Adsorption: Mechanistic Insights and Applications

Nadyn Amalia Resi; Muhammad Maulana Ichwan; Fatimah Hapsari

doi:10.14710/jvsar.v6i2.25113

DOI: https://doi.org/10.14710/jvsar.v6i2.25113

The Role of Acid Catalysts in Optimizing Iron Adsorption: Mechanistic Insights and Applications

*Nadyn Amalia Resi - Departement of Industrial Chemical Engineering Technology, Faculty of Vocational School, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275, Indonesia

Muhammad Maulana Ichwan - , Indonesia

Fatimah Hapsari - Departement of Industrial Chemical Engineering Technology, Faculty of Vocational School, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275, Indonesia

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Abstract

This research aims to evaluate the influence of acid catalysts HCl and H₂SO₄, on the adsorption efficiency of Fe (Iron) using silica extracted from rice husk ash. The synthesis process employs the sol-gel method, including the initial treatment of rice husk ash, sodium silicate extraction, and the formation of silica gel with acid catalysts. The research results show that acid catalysts affect the structure and adsorption efficiency, with the highest efficiency obtained using 0.5M HCl catalyst with an adsorption efficiency of 62.3% and 0.5M H₂SO₄ catalyst with an adsorption efficiency of 24.85%. FTIR analysis to identify functional groups revealed siloxane (Si-O-Si) and silanol (Si-OH) contain on silica, which support the metal adsorption capability. The results of the morphological observation using SEM show that the amorphous silica structure has diverse pores based on the type of catalyst.

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Keywords: silica; sol-gel method; HCl and H2SO4; FTIR; SEM

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Language : EN

In Volume 6, Issue 2, Year 2024 (October 2024)

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