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Adsorption Kinetics and Isotherms of Cu(II) and Fe(II) Ions from Aqueous Solutions by Fly Ash-Based Geopolymer

Aprilina Purbasari1, Dessy Ariyanti1, Siswo Sumardiono1, Khansa Khairunnisa1, Tyaga Sidharta1
Affiliation: 
1 Department of Chemical Engineering, Faculty of Engineering, Diponegoro University Jl. Prof. Soedarto, Kampus Tembalang, Semarang 50275, Indonesia aprilina.purbasari@che.undip.ac.id
DOI: 
https://doi.org/10.23939/chcht16.02.169
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Abstract: 
This paper describes the adsorption of Cu2+ and Fe2+ ions, common heavy metals found in industrial wastewater, by a fly ash-based geopolymer in batch adsorption experiments. Kinetics studies showed that the adsorption of each ion followed a pseudo-second order reaction. Moreover, adsorption isotherm of Cu2+ and Fe2+ ions followed the Langmuir model. Monolayer adsorption capacities were approximately 53.76 mg/g for Cu2+ ion and 52.63 mg/g for Fe2+ ion, respectively.
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