Histamine Adsorption from aqueous solution using Silica-Based SiO2@BSA Adsorbent from Natural Sand: Adsorption Parameters, Kinetic Models, Isotherms, and Thermodynamics

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Document Type : Research Article

Authors

1 Chemistry Education Department, Faculty of Education and Teachers Training, University of Nusa Cendana, Kupang, East Nusa Tenggara

2 Chemistry Education Department, Faculty of Education and Teachers Training, University of Nusa Cendana, Kupang, East Nusa Tenggara, 85001, Indonesia

3 Department of Chemistry, Bogor Agricultural University, Bogor, 16144, Indonesia

Abstract

This study aims to examine histamine adsorption using Takari natural sand-based SiO2@BSA as the silica source. Silica was extracted using the hydrothermal and coprecipitation methods and then modified into SiO2@BSA adsorbent using the ultrasonication method. After that, the adsorbent was used to adsorb histamine. The results showed that the mass ratio of SiO2 and BSA to the histamine adsorption was 1:0.02 (qe=11.39 mg/g), with optimum adsorption pH of 5 (qe= 12.33 mg/g) and a contact time of 60 minutes (qe=12.36 mg/g). The percentage of histamine removal was 96%. The kinetic model was pseudo-second order type 1 with an adsorption rate constant of 6.3x10-3 g.mg-1, while the isotherm model was Langmuir with R2=0.997; qe=18 mg/g. Thermodynamic parameters indicated that the adsorption process was exothermic with a high degree of randomness, and the histamine adsorption by silica-based SiO2@BSA adsorbent from natural sand occurred chemically.

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Iranian Journal of Chemistry and Chemical Engineering

Articles in Press, Accepted Manuscript
Available Online from 04 October 2023

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