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All Journal Jurnal Periodic Jurusan Kimia UNP Indonesian Journal of Chemistry Pelita Eksakta MASALIQ: Jurnal Pendidikan dan Sains SAINTI: Majalah Ilmiah Teknologi Industri Jurnal Pendidikan MIPA
Nizar, Umar Kalmar
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Religion Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Photocatalytic Degradation of Polyethylene Microplastics Using Microwave-Activated Gadolinium Oxide Catalyst Ismail, Mohammad Luqman; Hanafi, Muhammad Farhan; Zamanhuri, Norezatul Shahirah Ahmad; Sapawe, Norzahir; Nizar, Umar Kalmar; Hamid, Hairul Amani Abdul; Sidik, Siti Munirah; Ibrahim, Siti Fatimah; Danish, Mohammed
Indonesian Journal of Chemistry Vol 26, No 2 (2026)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.108052

Abstract

The persistent presence of polyethylene (PE) microplastics in aquatic environments poses serious environmental and health risks due to their resistance to conventional degradation methods. This study explores the photocatalytic degradation of PE microplastics using microwave-activated gadolinium oxide (Gd2O3) under visible light irradiation. Key operational parameters, including pH solution, catalyst dosage, and initial PE concentration were systematically investigated. Optimal degradation efficiency (68%) was achieved at pH 7, a catalyst dosage of 3 g/L, and a PE concentration of 10 mg/L. Kinetic analysis indicated that the degradation followed a pseudo-first-order model, with a maximum apparent rate constant (Kapp) of 0.0103 min−1 (R2 = 0.9782). The degradation mechanism was further elucidated using the Langmuir–Hinshelwood kinetic model, suggesting a surface-mediated reaction with a high adsorption equilibrium constant (KLH) of 0.4896 L/mg, indicating strong PE adsorption. The reduced degradation efficiency at higher PE concentrations was attributed to the limited generation of reactive oxygen species and increased light scattering. Overall, the findings demonstrate Gd2O3's potential as an efficient, environmentally benign photocatalyst, contributing significantly to the development of rare-earth-based materials for sustainable microplastic remediation in water treatment technologies.
Co-Authors Afrilia, Yoni Agustin, Andre Althof, Hasnah Sausan Anjelia, Mariza Auzakiyah, Sabella Azzahra, Wenalda Hanifah Budhi Oktavia Charles Banon Danish, Mohammed Della Rosalynna Stiadi Deski Beri Desy Kurniawati Edi Nasra Ellizar ellizar Fadhila, Radhiatul Fadila, Radhiatul Fika, Miva Hemalia Fitri Amelia Fitriani Fitriani Gusvita, Nola Hamid, Hairul Amani Abdul Hanafi, Muhammad Farhan Hapzi Ali Hardeli Hardeli Hary Sanjaya Ibrahim, Siti Fatimah Indang Dewata Ismail, Mohammad Luqman Istiqamah, Siti Sarah Izanel, Rezi Ananta Karmila, Aroma Karsa, Dion Randi Khaliq, Feni Kurnia Lubis, Amalia Putri Miftahul Jannah Miftahul Khair Miftahurrahmi, Miftahurrahmi Minda Azhar Muhammad Farhan Mukhaiyar, Riki Novel, Dheo Shalsabilla Novela, Riana Novriansyah, Edo Pernadi, Niza Lian Putra, Ananda Putri, Natasya Alya Putri, Yunisa Anugrah R, Yoanatul Hasanah Rahadian Zainul Rahmi Rahmi Rahmi, Fathaniah Raviqa Rahmi, Maulidia Arsyta Riga, Riga Risma Sari, Risma Rizki, Suci Yulia Sabrina, Joya Sapawe, Norzahir Sari, Trisna Kumala Sherly Kasuma Warda Ningsih Sidik, Siti Munirah Sidiq, Aqil Marsya Simbolon, Ranita Sri Benti Etika Suryelita, Suryelita Syafri, Vanny Sofiana Syafriadi, Riko Utami, Esssylia Afriyanti Veronita, Silvi Wulandari, Yolanda Yanti, Fetria Rahayu Wendi Yuliani, Amelinda Zamanhuri, Norezatul Shahirah Ahmad Zulhendra, Zulhendra Zuyyina, Himla