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Journal : Chemistry Indonesian Journal of Chemical Research

Kinetic of Hexavalent Chromium (Cr(VI)) Removal by Corn Cob-Based Activated Carbon Modified with Nitric Acid Ratnaningsih, Wahyu; Aningtyas, Vebri; Shabrina, Husna Muizzati; Arifin, Uma Fadzilia; Prayogo, Wisnu; Amin, Muhammad
Indonesian Journal of Chemical Research Vol 12 No 3 (2025): Edition for January 2025
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2025.12-rat

Abstract

The presence of heavy metal Cr(VI) in water indicates environmental pollution. Heavy metal Cr(VI) that exceeds the standard can be harmful to health because it is toxic and carcinogenic. Activated carbon can be used as a heavy metal adsorbent. Modification of activated carbon using nitric acid can increase metal adsorption capacity. Therefore, this study aims to determine the kinetic of hexavalent chromium (Cr(VI)) removal by corn cob-based activated carbon modified with nitric acid. The modified activated carbon was characterized by Boehm titration and FTIR spectrophotometer. The adsorption capacity was identified in various parameters, involving the initial concentration of Cr(VI), pH value, contact time, and concentration of the adsorbent to obtain the optimal Cr(VI) removal efficiency value. The most optimal Cr(VI) adsorption was obtained at an activated carbon dosage of 3 g/L, pH value of 1, contact time of 140 minutes, and 100 mg/l Cr(VI) concentration. Based on adsorption kinetics data, the pseudo-second-order equation was obtained (R2 =0.994). The adsorption phenomenon followed the Langmuir isotherm model (R2 = 0.998) with an optimum adsorption capacity of 28.32 mg/g. Corn cob-activated carbon modified with nitric acid has many acidic groups that act as effective active sites for reducing Cr(VI) from water.
Co-Authors Aditya Prana Iswara Adri Firmansyah Aidil Candri, Dining Akbar, Salman Azaria Al Azhar, Muhammad Reza Alfarishi, Bilal Alvan, Syahreza Ani Purwanti Aningtyas, Vebri Aprilia, Maya Arbintarso, Ellyawan Setyo Arwieny Hanami, Zarah Atika, Liana Aulia Annas Mufti Azizah, Rifka Noor Bambang Winardi Buana, Dwinto Martri Aji Cahya Alam, Firdha Chairunnisa, Nadda Khalila Cionita, Tezara Daudsyah Imami, Ahmad Depri Dewi, Ninne Sevtiana Dhifaf Athiyah Zhabiyan dian febrianti Dion Dion Awfa Ernindah Sormin Ersa, Nanda Savira Fajriharish Nur Awan, Fajriharish Nur Farizal, Teuku Fitria, Laili Fitriyana, Deni Fajar Gultom, Tiara Gustinasari, Kiki Harry Wibowo HASAN, NIA YUNIARTI Hilman, Zaki Husaini, Muhammad Zakki I Wayan Koko Ihsan, Muhammad Faris Ikhwal, M. Faisi Ikhwali, Muhammad Faisi Ilham Nofri Yandra Imami, Ahmad Daudsyah Imelda Masni Juniaty Sianipar Imran, Al Ichlas Istiqomah Shariati Zamani Junaedi, Thomas Kahar Kahar, Kahar Kamal, Mushthofa Kevin Maghrival Khairi, Alfin Khairuni, Zhili Izzadati Kristianto, Sonny Lukman, Mena Fadillia M. Faisi Ikhwali M. Habib Algifari Marbun, Hanna Swesy Masruroh, Heni Maulida, Fatimah Mawaddah, Nurul Meisya Ruth, Gabriella Meisya Ruth Meylis Safriani Moh. Awaludin Adam Muchlis Muchlis Muflihah, Lilih Muhammad Amin Muklis Muklis Mustaqiman, Aulia Nur Nastiti, Almira Davina Novianti, Puteri Denita Novrianty, Irma Nugroho, Agung Nur Novilina Arifianingsih Nur Sakinah Nur, Aulia Mustaqiman Nurul Aulia Larasati Pangestu, Muhammad Puri Dwi Panjaitan, Nahesson Panjaitan, Nahesson Hotmarama Pasaribu, Hugo S. V. Prayatni Soewondo Purnawan Purnawan Putri, Regia Afiyanti Qadafi, Muammar Rachmat Mulyana Ragorudin, Abdul Karim Rahmadani, Sarra Ratnaningsih, Wahyu Ridhosari, Betanti Rifka Noor Rozanna Dewi Sahid Samsudin Anis Sari, Mega Mutiara Septiariva, Iva Yenis Setiyawan, Ahmad Soleh Shabrina, Husna Muizzati Shofi Talbia, Husna Simanullang, Lillis Siregar, Januar Parlaungan Sofiyah, Evi Siti Sri Rahayu Gusmarwani, Sri Rahayu Sri Sunarsih Subroto, Michael Suhardono, Sapta Suhodo, Muhammad Adil Setiyanto Suparni Setyowati Rahayu Suryawan, I Wayan Koko Teguh Budi Prijanto, Teguh Budi Tia Dwi Irawandani Tinov, Naufal Tio Katarina Marpaung Trimailuzi Tuti Mutia Ulhasanah, Nova Ulya Bunga, Venny Uma Fadzilia Arifin, Uma Fadzilia Wesli Wesli Widiatama, Angga Jati Widyarsana, I Made Wahyu Wijayanto, Etanto Heiliano Yasa Palaguna Umar, Yasa Palaguna Zakia Zakia Zhilli Izzadati Khairuni Zubir, Moondra Zurfi, Alfian