Abstract

As an effort to observe the impact of pollution on the aquatic environment, water quality monitoring calls for the development of early detection technologies that are fast, efficient, and inexpensive. Currently, electrochemical sensors are an alternative technology to sensitively analyze pollutants in the aquatic environment. Engineering working electrodes to sense polluting compounds is the target of technology development. This work studies material compositions consisting of graphite carbon with TiO2 nanoparticles as a photoelectrode to analyze chemical oxygen demand (COD) in methylene blue (MB) organic dye wastewater. The materials were prepared by physically mixing the two components and one-pot chemical synthesis, characterizing their microstructure and crystallinity. Then, their analytical performance was assessed by measuring MB dye as a sample against the mass variation of 1:1 (w/w) and 1:2 (w/w) photoelectrodes. The results showed similar 1:1 (w/w) performance with the relevant and theoretical COD. The straightforward synthesis and eco-friendly materials are key factors in the fabrication of COD sensor.

Practical Applications

This study proposes a technical process for the fabrication and application of photoelectrodes in detecting the chemical oxygen demand (COD) of methylene blue dye. It solves the problems of COD detection in identifying water quality in wastewater, and the problems of long and the problems of dangerous materials used against COD determination. It provides a new understanding of rapid COD detection to measure water quality in wastewater. In practical applications, the fabricated photoelectrode was placed into dye solution and connected to a potentiostat instrument, which was irradiated by ultraviolet (UV) light to initiate the photoelectrocatalytic reaction. The accumulation of organic dye in water will generate the electrical properties (photocurrent) of the photoelectrode, which can the be measured by a multipulse amperometry system. It performs two performance functions at once, namely photoelectrodegradation and COD sensing. In COD sensor performance, the photocurrent response is plotted against the time duration where the photocurrent generated is proportional to the oxidation performance against the organic dye concentration and calculated by the Faraday equation. This research offers several advantages, such as fast response time and real-time detection for COD determination. It also provides more sensitive and accurate measurement of organic pollutants in water. The COD photoelectrocatalysis method can be a practical application for rapid detection of methylene blue organic dye.

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Data Availability Statement

All data are available, such as characterization (morphology and crystallinity) and COD photoelectrocatalysis test (linearity and photocurrent response), from the corresponding author upon reasonable request.

Acknowledgments

The authors gratefully for financial support from RisetMu Grant Batch VI with Project No.: 5581 and to the laboratory of photocatalysis in the Department of Environmental Engineering, Universitas Muhammadiyah Kendari and Titania Research Group, Universitas Halu Oleo that was partially supported in this research.
Author contributions: Dwiprayogo Wibowo: conceptualization, awardee of research grant, methodology, and writing. La Pande Jurumai: data curation, software, visualization, and editing. Sintha Liawaty, Muhammad Ardi, and Novita Rizki Rahmawati Saida: investigation, data curation, and data collected. Rosdiana Rosdiana, Faizal Mustapa, and M. Kunta Biddinika: Writing, reviewing, and correcting of the manuscript. Ilham I. and Muhammad Nurdin: laboratory facilities at Universitas Muhammadiyah Kendari and Universitas Halu Oleo.

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Go to Journal of Environmental Engineering
Journal of Environmental Engineering
Volume 149Issue 11November 2023

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Received: Feb 25, 2023
Accepted: May 9, 2023
Published online: Aug 22, 2023
Published in print: Nov 1, 2023
Discussion open until: Jan 22, 2024

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Associate Professor, Dept. of Environmental Engineering, Faculty of Engineering, Universitas Muhammadiyah Kendari, Jl. Kh. Akhmad Dahlan No. 10, Kendari, Southeast Sulawesi 93115, Indonesia (corresponding author). ORCID: https://orcid.org/0000-0003-1546-3385. Email: [email protected]
La Pande Jurumai [email protected]
Associate Professor, Dept. of Architecture, Faculty of Engineering, Universitas Muhammadiyah Kendari, Jl. Kh. Akhmad Dahlan No. 10, Kendari, Southeast Sulawesi 93115, Indonesia. Email: [email protected]
Sintha Liawaty [email protected]
Assistant Engineer, Dept. of Environmental Engineering, Faculty of Engineering, Universitas Muhammadiyah Kendari, Jl. Kh. Akhmad Dahlan No. 10, Kendari, Southeast Sulawesi 93115, Indonesia. Email: [email protected]
Muhammad Ardi [email protected]
Assistant Engineer, Dept. of Environmental Engineering, Faculty of Engineering, Universitas Muhammadiyah Kendari, Jl. Kh. Akhmad Dahlan No. 10, Kendari, Southeast Sulawesi 93115, Indonesia. Email: [email protected]
Novita Rizki Rahmawati Saida [email protected]
Assistant Engineer, Dept. of Environmental Engineering, Faculty of Engineering, Universitas Muhammadiyah Kendari, Jl. Kh. Akhmad Dahlan No. 10, Kendari, Southeast Sulawesi 93115, Indonesia. Email: [email protected]
Rosdiana Rosdiana [email protected]
Associate Professor, Dept. of Environmental Engineering, Faculty of Engineering, Universitas Muhammadiyah Kendari, Jl. Kh. Akhmad Dahlan No. 10, Kendari, Southeast Sulawesi 93115, Indonesia. Email: [email protected]
Ilham Ilham [email protected]
Associate Professor, Faculty of Engineering, Universitas Halu Oleo, Jl. HEA Mokodompit Kampus Baru, Kendari, Southeast Sulawesi 93232, Indonesia. Email: [email protected]
Faizal Mustapa [email protected]
Associate Professor, Dept. of Marine Sciences, Institute of Technology and Business Muhammadiyah Kolaka, Jl. Tamalaki No. 13, Kolaka, Southeast Sulawesi 93511, Indonesia. Email: [email protected]
Muhammad Nurdin [email protected]
Professor, Dept. of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo, Jl. HEA Mokodompit Kampus Baru, Kendari, Southeast Sulawesi 93232, Indonesia. Email: [email protected]
Muhammad Kunta Biddinika [email protected]
Associate Professor, Faculty of Industrial Technology, Universitas Ahmad Dahlan, Jl. Prof Soepomo, Janturan, Warungboto, Umbulharjo, Yogyakarta 55164, Indonesia. Email: [email protected]

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