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Journal : Bulletin of Chemical Reaction Engineering

Eco-Friendly Photocatalyst from Limestone: ZnO-Hydroxyapatite Composite for Efficient Rhodamine B Removal Sukarta, I Nyoman; Suyasa, I Wayan Budiarsa; Mahardika, I Gede; Suprihatin, Iryanti Eka; Sastrawidana, I Dewa Ketut; Wiratma, I Gusti Lanang; Darmayasa, Dewa Komang
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 3 Year 2025 (October 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20426

Abstract

This study aims to synthesize and characterize a limestone-based ZnO-hydroxyapatite (HA/ZnO) composite and evaluate its performance in the photocatalytic degradation of Rhodamine B under UV irradiation. Hydroxyapatite was synthesized by reacting calcined CaO from limestone with orthophosphoric acid and subsequently combined with ZnO via a co-precipitation–hydrothermal method. The materials were characterized using X-ray Diffraction (XRD) and Fourier Transform Infra Red (FTIR) to determine their crystal structure and functional groups. The HA/ZnO composite exhibited the smallest crystallite size (14.86 nm), indicating enhanced surface area and strong interfacial interaction. Photodegradation tests revealed optimal conditions at pH of 9, Rhodamine B concentration of 20 mg/L, and catalyst dosage of 1.5 g, achieving a maximum degradation efficiency of 99.81%. Toxicity assessment using a corn seed germination test showed a significant increase in germination rate from 16% (untreated) to 92% (after photocatalytic treatment). These findings suggest that the limestone-derived HA/ZnO composite is a promising, environmentally friendly, and efficient photocatalyst for textile dye wastewater treatment. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors ., PROF.DRS. NENGAH BAWA ATMAJA, M.A A. W. Puger Ade Kiki Sintya Dewi Adnyana I P. G. G. Ameliya, Riska Anak Agung Ayu Sri Trisnadewi Anak Agung Putu Putra Wibawa Andini, Ni Putu Mega Arnawa I W. Bernika J.S. Bulu, Sosiawan CANDRADIARTA I P. M. Darmayasa, Dewa Komang Dewi, Ade Kiki Sintya Dharmawan N.S Dharmawan, I N.S. Djokowoerjo Sastradipradja Dwipayana I K. B Febryanti F. A. G.A.M. KRISTINA DEWI Gertrudis Vebriyanti Kahar Gusti A Malelak Gusti Ayu Mayani Kristina Dewi HARDIAWAN N. D HARDIAWAN N. D. Hartadi W. D. I Dewa Ketut Sastrawidana I G A Surya Utami Dewi I G. Lanang Oka Cakra I G. N. Kayana, I G. N. I Gede Ketut Sri Budarsa I Gede Putu Kawiana I GUSTI AYU MANIK ERMAYANTI I GUSTI LANANG OKA I Gusti Lanang Oka I Gusti Lanang Wiratma I K. E. A., Putrayasa I K. K. Agustina I K. SUMADI I Kadek Swastika I Kadek Yoga Kertiyasa I KETUT ARYANA I Ketut Catur Marbawa I Ketut Mangku Budiasa I Ketut Sumadi I Komang Budaarsa I M. Mudita I M. SUASTA I M. Y., Artawan I Made Adhika I Made Damriyasa I Made Dira Swantara I Made Dwi Setiawan I Made Nuriyasa I Made Rasta I Made Sara Wijana I Made Sara Wijana I N. Suastaka I Nengah Sujaya I Nengah Wirajana I NYOMAN RAI I Nyoman Rai I P. A. ASTAWA I P. A. Astawa I P. A. Astawa I P. A. Astawa I Putu Andre Japani Satya Saputra I Putu Ari Astawa I Putu Suyadnya, I Putu I W BUDIARSA SUYASA I W. Suarna I W. SUDIASTRA I W. SUKANATA I Wayan Sandi Adnyana I Wayan Suarna I Wayan Sujana I. B. Sudana I. M. Mastika I. W. Suama I.G.A.M. ARYASIH I.W Kasa I.W. Kasa IDA AYU ASTARINI Ida Ayu Putu Sri Mahapatni Ida Ayu Putu Widani Sugianingrat Ida Bagus Gaga Partama Ida Bagus Made Oka Ida Bagus Ngurah Swacita Ida Bagus Sudana Ika Kurniawati Indra Arimahayana Iryanti Eka Suprihatin K. Yogi Purnamawati Kadek Karang Agustina Kadek Rihendra Dantes Kartikasari D Kencana Jaya IP.G.A.S Ketut Gede Suryawan Komang Suciani Paramita L. Doloksaribu Luh Dewi Anggreni Lumbansiantar M. M Ariasih M. Sudiana Mahendra Made Antara Made Novia Indriani Magna Anuraga Putra Duarsa N. K. S. P., Dewi N. N. Suryani N. P. Mariani N.N. Suryani N.S. Dharmawan Nasrullah H. I. Ngurah Kayana, I Gusti Ni Luh Putu Sriyani Ni Made Diani Ni Made Indra Wahyuni Ni Made Wedayani Ni Nyoman Ayu Widyasari Ni Nyoman Suryani NI PUTU MARIANI Ni Putu Mega Andini Ni Putu Putri Wijayanti Ni Putu Sarini Ni Putu Sarini Ni Wayan Suniasih Nyoman Sadra Dharmawan Oka A.A P. E. N., Putri P.A. Astawa Perdana, Sigit Pranata I P. Y. A. Prawira I G. I. K. Putu Lakustini Cahyaningrum PUTU SUYADNYA Putu Vindhy Chempaka Putri S. PUTRA S. Putra S. Putra Saransi A. U. Sastrawan I P. L. Sastrawan P. K. P. N SENTANA PUTRA SENTANA PUTRA Sentana Putra Sigit Perdana Simbolon M. Y. Sinta Dewi R. A. Sio Stefanus, Sio Sosiawan Bulu Sri Dian Meita Sari Suasta I M. Suasta IM. Supriana I M. Surya Kencana Jaya P. G. A. Tjokorda Gede Belawa Yadnya Udayana P. W. K. Wayan Andhika Putrayasa Wedayani, Ni Made Widnyani D A. P. Yusadana P.