Removal of Methyl Orange in Aqueous Medium using ZnO/Bentonite as Semiconductor by Photocatalytic Process

Satria Jaya Priatna, Ayu Yuliana, Zulkarnain, Elda Melwita, Fitri Suryani Arsyad, Risfidian Mohadi

Abstract

Pillarization of bentonites (from East Java) with ZnO semiconductors has been synthesized using co-precipitation methods into a ZnO/Bentonite composite and applied as a catalyst in a photocatalytic process to remove Methyl Orange (MO) dyes. The optimum pH condition of MO dyes is at pH 2 with a degradation rate of 22.91% (from 15 mg/L to 11.523 mg/L). The optimum ZnO/Bentonite catalyst weight condition is 200 mg, with a degradation rate of 29.11% (from 15 mg/L to 10.596 mg/L). The optimum time condition for UV lamp irradiation is 60 minutes, with a degradation rate of 64.92% (from 15 mg/L to 5.244 mg/L). The kinetics of MO photocatalytic reaction using ZnO/Bentonite catalyst follows the pseudo-first-order Langmuir Hinshelwood-Santosa kinetic model with photocatalytic reaction rate constant (k1) of 0.014 and photocatalytic equilibrium constant (K) of 0.012.

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Authors

Satria Jaya Priatna
Ayu Yuliana
Zulkarnain
Elda Melwita
Fitri Suryani Arsyad
Risfidian Mohadi
risfidian.mohadi@unsri.ac.id (Primary Contact)
Priatna, S. J. ., Yuliana, A., Zulkarnain, Melwita, E., Arsyad, F. S., & Mohadi, R. (2024). Removal of Methyl Orange in Aqueous Medium using ZnO/Bentonite as Semiconductor by Photocatalytic Process. Science and Technology Indonesia, 9(3), 539–545. https://doi.org/10.26554/sti.2024.9.3.539-545

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