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Article

Effect of Radio-Frequency Treatment on the Changes of Dissolved Organic Matter in Rainwater

1
Department of Electrical Engineering, Andalas University, Padang 25166, Indonesia
2
Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
3
Department of Chemical Engineering, Universitas Bung Hatta, Padang 25173, Indonesia
4
River Basin Research Center, Gifu University, Gifu 501-1193, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: Vincenzo Naddeo and Chi-Wang Li
Water 2022, 14(1), 111; https://doi.org/10.3390/w14010111
Received: 1 December 2021 / Revised: 12 December 2021 / Accepted: 31 December 2021 / Published: 5 January 2022
Rainwater is a potential source of drinking water, but has various components of dissolved organic matter (DOM). DOM is a reservoir of potential hazards in drinking water. Therefore, a new method is required to purify rainwater as a drinking water source in terms of DOM aspects. A radio-frequency (RF) treatment system is introduced here to purify source water with a small possibility of contamination. RF is generated by applying a frequency of 1.5 MHz through a glass reactor with a diameter of 2 mm which is wrapped by a 2 mm copper wire. The results demonstrate that UV260 value and dissolved organic carbon (DOC) are reduced during RF treatment. DOC was reduced by a lower amount compared to UV260, suggesting the partial transformation of bio-refractory DOM. A fluorescence excitation-emission matrix showed that humic-like substances in rainwater were reduced faster than protein-like ones, indicating that humic-like substances are susceptible to reduction by RF treatment. The results offer information on the use of RF treatment in a rainwater purification process for the production of drinking water. View Full-Text
Keywords: dissolved organic matter; radio-frequency treatment; rainwater; humic-like substances dissolved organic matter; radio-frequency treatment; rainwater; humic-like substances
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MDPI and ACS Style

Hazmi, A.; Rosadi, M.Y.; Desmiarti, R.; Li, F. Effect of Radio-Frequency Treatment on the Changes of Dissolved Organic Matter in Rainwater. Water 2022, 14, 111. https://doi.org/10.3390/w14010111

AMA Style

Hazmi A, Rosadi MY, Desmiarti R, Li F. Effect of Radio-Frequency Treatment on the Changes of Dissolved Organic Matter in Rainwater. Water. 2022; 14(1):111. https://doi.org/10.3390/w14010111

Chicago/Turabian Style

Hazmi, Ariadi, Maulana Y. Rosadi, Reni Desmiarti, and Fusheng Li. 2022. "Effect of Radio-Frequency Treatment on the Changes of Dissolved Organic Matter in Rainwater" Water 14, no. 1: 111. https://doi.org/10.3390/w14010111

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