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All Journal IPTEK The Journal of Engineering JURNAL NASIONAL TEKNIK ELEKTRO Turbo : Jurnal Program Studi Teknik Mesin SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan JISIP: Jurnal Ilmu Sosial dan Pendidikan Pilar Teknologi : Jurnal Penelitian Ilmu-ilmu Teknik International Journal of Community Service International Journal Artificial Intelligent and Informatics Indonesian Community Journal SinarFe7 Makara Journal of Science Sewagati AutoMech : Jurnal Teknik Mesin Jurnal Inovasi dan Pengembangan Hasil Pengabdian Masyarakat Journal of Engineering and Technological Sciences Educommunity Jurnal Pengabdian Masyarakat Jurnal Abdimas Dosma Qiyas : Jurnal Hukum Islam dan Peradilan
Arifin, Rizal
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Journal : IPTEK The Journal of Engineering

 1 
Application of Electrocoagulation in Stabilizing pH and Removing Pollutants from Domestic and Urban Wastewater Using Aluminum Electrodes Kaloka, Ardista Izdhihar; Faizah, Nurul; Arifin, Rizal; Aulia, Anisa Fatma; Putra, Muhammad Benaldo Anugrah; Wati, Ni’mah; Prayadi, Icha Nur
IPTEK The Journal of Engineering Vol. 11 No. 2 (2025)
Publisher : Pusat Publikasi Ilmiah, Institut Teknologi Sepuluh Nopember.

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Abstract

This study investigates the application of electrocoagulation using aluminum electrodes to stabilize pH and remove pollutants from various real wastewater sources in Surabaya, Indonesia, including laundromats, fast food restaurants, campus canteens, mechanical workshops, and tofu industries. A batch-mode electrocoagulation process was conducted using 10 A of current over 60 minutes, and the performance was evaluated based on pH changes, turbidity, and Total Suspended Solids (TSS) removal. The highest TSS removal efficiency of 98% was observed in machine shop wastewater, while laundromat samples also achieved high performance with 97% reduction. Electrocoagulation demonstrated strong pH stability in effluents with buffering compounds such as those from campus canteens and workshops, whereas fluctuating pH and turbidity levels were found in tofu and fast-food effluents, indicating the need for process optimization. Turbidity decreased significantly across all samples, confirming effective floc formation during electrolysis. The findings confirm that electrocoagulation is a promising method for treating both domestic and urban wastewater. However, integrating additional processes such as adsorption or filtration is recommended to enhance performance for complex wastewater compositions and ensure compliance with discharge standards.
Effect of Inhibitor Addition, pH, and Current Density on the Corrosion Rate of Fe Metals Aulia, Anisa Fatma; Faizah, Nurul; Arifin, Rizal; Kaloka, Ardista Izdhihar; Thufailah, Gladys Sukma
IPTEK The Journal of Engineering Vol. 11 No. 2 (2025)
Publisher : Pusat Publikasi Ilmiah, Institut Teknologi Sepuluh Nopember.

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Corrosion significantly impacts public safety and the economy, causing substantial financial losses, infrastructure damage, and hazardous incidents across various industries. Researchers investigated the effects of pH, current density, and corrosion inhibitors (potassium chromate and potassium nitrate) on iron corrosion by measuring weight loss of iron samples immersed in sulfuric acid over time. The addition of inhibitors showed that KNO3 was more effective in reducing the corrosion rate, with values of 4.992068, 3.744051, 2.736034, 1.728017, and 0.608008 mils per year, compared to K2CrO4, which resulted in 9.728132, 7.296099, 5.472066, 3.648033, and 1.216017 mils per year. Corrosion rate increased as pH decreased, with Fe showing corrosion at pH 6.21, 5.18, 4.26, 3.85, and 3.22. The relationship between current density and corrosion rate was found to be proportional, with voltage values of 1.31, 2.24, 3.16, 5.11, and 7.1 amperes per square meter (A/m^2). This study confirms that inhibitor type, acidity (pH), and current density significantly influence corrosion behavior, where increasing pH and current density can accelerate corrosion, and potassium nitrate (KNO3) demonstrates superior corrosion inhibition compared to potassium chromate (K2CrO4).
Co-Authors abdurrouf Abdurrouf Achmad, Nanang Suffiandi Adi Mustiko, Vijay Adi Soeprijanto Afan Hamzah, Afan Agung Purniawan, Agung Agus Prianto Aidha Putri, Evi Zulfa Akhmad, Nanang Suffiadi Al Hakim, Faris Helmi Ali Altway Ali Selamat Aliyadi, Aliyadi Alkamalia, Andini Nabila Anggi N U, Elfina Arviana, Ekyk Aulia, Anisa Fatma Awalludin, Fachrul Ayub Dwi Anggoro, Ayub Dwi Azizah, Hanifha Nur Cahyono, Agung Dwi Cobantoro, Adi Fajaryanto Darminto . Desriyanti, Desriyanti Diah Pratami, Riska Dyah Mustikasari Edy Kurniawan, Edy Eli Purwati, Eli Fadelan Fadelan, Fadelan Ghulam Asrofi Buntoro Giovani, Nurya Hadi, Hadi Santoso Happy Susanto Ida Widaningrum, Ida Ifana, Ayu Meilia Intan Vidyastri, Rhesma Irvan Nur Ridho Jamil, Salma Fauziyah Johari, Norhasnidawani Kaloka, Ardista Izdhihar KUNTANG WINANGUN Kusnawan, Wawan Lailatul Qomariyah, Lailatul Lee, Vannajan Sanghiran Lestari, Riza Ayu Lily Pudjiastuti, Lily Munaji, Munaji Muzakki, Fikrun Najib Niniek Fajar Puspita, Niniek Fajar Nugroh, Oki Cahyo Nurcahyo, Rifky Irfan Nurdin, Zurifah Nurlaili Humaidah, Nurlaili NURUL FAIZAH Oki Cahyo Nugroho, Oki Cahyo Prasetyo, Arif Adi Prasetyo, Arya Aji Prayadi, Icha Nur Putra, Muhammad Benaldo Anugrah putra, wawan Rahmawati, Alvina Eka Rizki Dwi Ardika Roziqin, Bahar Sitorus, Iwan Ramadhan Sudarno Sudarno Sudarno, Sudarno Sugianti, Sugianti Suprapto Suprapto Syah, Moch. Aziz Zulian Thufailah, Gladys Sukma Trisanti, Warlinda Eka Trisnadi Putra, Wawan Wati, Ni’mah Wawan Trisnadi Putra, Wawan Trisnadi Winardi, Yoyok Wirapandhu, Dwi Yusuf, Farid Zacky, Uruqul Nadhif Zuchrillah, Daril Ridho Zulkarnain, Zulkarnain