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All Journal KOVALEN: Jurnal Riset Kimia JURNAL SIMETRIK
Rawati, Widya Yeni
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering

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TEKNOLOGI ENERGI SURYA SEBAGAI SUMBER ENERGI ALTERNATIF DALAM PROSES ELEKTROPLATING Warsono, Warsono; Maulana, Irfan; Rawati, Widya Yeni; Sunardi, Sunardi; Solehudin, Agus
JURNAL SIMETRIK Vol 15 No 2 (2025): Desember
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/js.v15i2.3494

Abstract

The rapid development of technology today demands the utilization of renewable energy sources, one of which is solar energy. As a sustainable energy source, sunlight has great potential due to its abundant and unlimited availability. Therefore, solar energy can be utilized in Solar Power Generation Systems (PLTS) to meet the electrical needs of various applications. This study discusses the design of a PLTS system as a potential energy source for an electroplating device. The system employs a 100 Wp solar panel and a 12 V 20 Ah battery as an energy storage medium. Based on the test results, the minimum power output was 51 W at an irradiation level of 650 W/m², while the maximum power output reached 107 W at an irradiation level of 804 W/m². Additionally, the heating element in the electroplating system produced a maximum temperature of 63.7 °C. These results indicate that the designed PLTS system is capable of effectively supplying the required energy for the electroplating process. Keywords: Renewable energy, electroplating, solar power
Effect of Column Diameter on the Performance of an Ion Exchange System in Reducing Water Hardness Rawati, Widya Yeni; Sunardi; Widarti, Sri; Sumarja; Nur Alim, Muhammad
KOVALEN: Jurnal Riset Kimia Vol. 11 No. 2 (2025): December Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2025.v11.i2.17907

Abstract

Ion exchange is an effective method for removing hardness ions such as Ca2+ and Mg2+ from water, and its performance is strongly influenced by column design parameters. This study aims to evaluate the effect of column diameter on the efficiency of a sequentially operated cation–anion ion exchange system at a constant flow rate of 10 L/h. Six column diameters (20, 25, 30, 35, 40, and 50 mm) were tested using synthetic solutions. The results showed that the 30 mm column achieved the highest ion-exchange performance, with a removal efficiency of 92.47%. This column also produced the most well-defined breakthrough curve, yielding an exchange capacity of 8.76 mg/g, equivalent to 0.437 meq/g for Ca2+ and 0.720 meq/g for Mg2+. These findings indicate that the 30 mm diameter provides an optimal balance between contact time and flow distribution, resulting in superior ion exchange efficiency.
Co-Authors Agus Solehudin Irfan Maulana, Irfan Nur Alim, Muhammad Sri Widarti, Sri Sumarja Sunardi Sunardi Sunardi Warsono Warsono