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Journal : Jurnal Riset Kimia

Study of Aluminum-Copper Electrodes for Chromium and Chemical Oxygen Demand Removal from Tannery Wastewater by Electrocoagulation Rivaldi, Mochammad Heldry; Rizky, Amelia; Hardian, Arie; Murniati, Anceu
Jurnal Riset Kimia Vol. 16 No. 1 (2025): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v16i1.744

Abstract

This study investigates the efficacy of the electrocoagulation (EC) process using aluminum (Al) anodes and cathodes for the treatment of leather tanning wastewater. Initial characterization revealed a chemical oxygen demand (COD) of 901.96 mg/L and total chromium content of 38.741 mg/L, where it exceeds the discharge limit permitted by the Minister of Environment Regulation No. 5/2014, the permissible limit for COD in industrial wastewater is 110 mg/L, and for total chromium, it is 0.6 mg/L. The EC process, conducted under varying conditions of electrolysis time (10, 20, and 30 minutes), potential (2.0, 3.0, 3.5, and 4.5 V), and current intensity (1.0, 2.0, and 3.0 A), demonstrated substantial reductions in both COD and chromium levels. The lowest COD value achieved was 28.05 mg/L at 3A, 4.5 V, and 30 minutes, representing a reduction of 52.09% to 74.50%. Total chromium content was reduced to as low as 0.013 mg/L, indicating a reduction of 90.45% to 97.83%. pH levels were monitored, revealing an increase due to OH- ion formation, with final pH values ranging from 6.38 to 8.34. XRF analysis of the commercial Al anode indicated a composition of 98.1% Al, 0.615% Fe, 0.522% Si, and 0.163% Zn. The findings underscore the effectiveness of the EC process in reducing COD and chromium content in leather tanning wastewater, meeting and exceeding regulatory standards.
Co-Authors Abdul Mutalib Afiyah, Delinda Nirmala Agma, Muljadji Agustini, Dewi Meliati Aini Aspiati Rohmah Alvi Aristia Ramadhiany Anceu Murniati Anceu Murniati Anggi Suprabawati Anggi Suprabawati Anni Anggraeni Anton Prasetyo Anwari, Nelly Safitri Aprillianto, Yesaya Asep Najmurrokhman Atiek Rostika Noviyanti Buchari Buchari Buchari Buchari Budiman, Senadi Chairussani Abbas Sopamena Dani Gustaman Syarif Dani Gustaman Syarif Dani Gustaman Syarif Dani Gustaman Syarif Dani Gustaman Syarif Datin Fatia Umar Dera Triani Dian Ayu Setyorini Dwi Rahayu Novianti Ekawandi, Fanny Rahman Eki Al Ghifari Fahmi Sulistyohadi Fikri Haikal Gilang Adi Nugraha Gustaman Syarif, Dani Halim, Riyan Hemzah, Sabila Aulia Herawati Herman Herman Himmah, Suci Noerfaiqotul Husein Hernadi Bahti Ika Monika Ika Monika Imas Masriah Inggarwati , Ervina Dwi Izzah, Nuril Lailatul Jasmansyah Jasmansyah Jasmansyah, Jasmansyah Karya, Teguh Kurnia, Irwan Kusumaningtyas, Valentina Adimurti Lilis Siti Aisyah, Lilis Siti Lisda Virdasari Ma’unatin, Anik Mapiliandari, Inda Maryani, Kanty Ma’amor, Azman Muhammad Reza Muhammad Yudhistira Azis Mulyani, Rahmaniar Nadia Annisa Fajriana Nafisah, Aulia Zakiyatun Nisrina, Aniqa Nur Aini Nur Aini Nurdeni, Nurdeni Nurhayati, Mita Phiciato Phiciato Purbaya, Sari Puspa Sari, Puspa Rahayu, Rizky Sri Restu Muchammad Ibrahim Rina Astriana Rina Herdiana Putri Rinto Yusriski Rivaldi, Mochammad Heldry Rizky, Amelia Rosi Rosidah RR. Ella Evrita Hestiandari Rusnadi Rusnadi Saefudin, Deny Bayu Safi'i, Abdi Wadud Safitri, Widiya Nur Safitri, Widya Nur Sagita, Fuja Savira, Amalia Senadi Budiman Senadi Budiman Senadi Budiman Senadi Budiman Setiyanto, Henry Sheley Marela Suharnoko Suharnoko Sujono, Hernandi Suryo Gandasasmita Suryo Gandasasmita Thoriq, Thoriq Tirta, Ardina Purnama Usman Ali Rouf Veinardi Suendo Yenny Febriani Yun, Yenny Febriani Yuliana, Trisna Yuliana, Trisna Yusuf Eka Maulana ZEILY NURACHMAN Zeily Nurachman