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Journal : Indonesian Journal of Chemistry and Environment

Treatment of Industrial Wastewater and Household Waste Using Electrocoagulation Method with Aluminum Electrode S. Suyanta; S. Sunarto; Susila Kristianingrum; Regina Tutik Padmaningrum; Derifasay Salsabilla; K. Karlinda
Indonesian Journal of Chemistry and Environment Vol 5, No 2 (2022): DECEMBER 2022
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijoce.v5i2.58394

Abstract

The treatment of industrial wastewater and household waste using the electrocoagulation method with aluminum electrodes aims to determine the optimal time and voltage to reduce iron content, manganese content, and TDS from industrial wastewater and household waste. The method used in this study was the electrocoagulation method with aluminum electrodes. The object of this research was the reduction of iron content, manganese content and TDS of industrial wastewater and household waste. The optimization test of electric voltage and electrocoagulation time was carried out at variations of electric voltage of 5, 10, and 15 volts and time variations of 1, 3, 6, 9, and 12 hours. Then the samples were analyzed using Atomic Absorption Spectroscopy (AAS), pH meter and TDS meter. The results showed that the optimal time and voltage to reduce iron content, manganese content, and TDS of industrial wastewater and household waste was 12 hours and 15 volts. After the electrocoagulation process, the iron content was reduced by 95.37%, the manganese content was reduced by 100%, the TDS value was reduced by 43.66%, and the pH value increased by 26.73%.
Curcumin Electropolymerization to Graphite Modification for Pb2+ Electrochemical Sensing Marwati, Siti; Prodjosantoso, Anti Kolonial; Padmaningrum, Regina Tutik; Wiraputri, Luthfia
Indonesian Journal of Chemistry and Environment Vol. 7 No. 2 (2024): DECEMBER 2024
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijoce.v7i2.81727

Abstract

Curcumin is an organic ligand that can be electrocatalytic. Curcumin can be coated on graphite electrodes to produce electrodes modified with curcumin (GPC). Curcumin acts as a ligand and forms complex compounds with metals. The modification process was carried out by electropolymerization. The electrochemical method characterized the electroactive area, electron transfer, and interaction between the electrode and Pb2+ metal ions. Functional groups and surface morphology were characterized using FTIR and SEM. Validation of analytical methods including linear range, sensitivity, limit of detection, limit of quantitation, precision, and accuracy. The interaction of the GPC electrode with Pb2+ follows the electrochemical adsorption process. The GPC electrode can identify the presence of Pb2+ metal ions with a range of 3.01-70.03 µM and 181-919.2 µM. The results of the analytical method validation include linear ranges of 3.125-67.400 µM and 179.334-919.5 µM; sensitivity of 3.3605 µA/µM; limit of detection of 6.07 µM; limit of quantitation of 18.39 µM; precision of 0.93%; and accuracy of 99%.