Harnessing iron materials for enhanced decolorization of azo dye wastewater: A comprehensive review.

Takashi Yamaguchi, Thu Huong Nguyen, Duc Viet Nguyen, Masashi Hatamoto, Yuya Takimoto, Takahiro Watari, Khac-Uan Do

Journal: Environmental research 2024;258():119418

PMID: 38897434

Full Text on Elsevier Science View on PubMed

Abstract

Highly colored azo dye-contaminated wastewater poses significant environmental threats and requires effective treatment before discharge. The anaerobic azo dye treatment method is a cost-effective and environmentally friendly solution, while its time-consuming and inefficient processes present substantial challenges for industrial scaling. Thus, the use of iron materials presents a promising alternative. Laboratory studies have demonstrated that systems coupled with iron materials enhance the decolorization efficiency and reduce the processing time. To fully realize the potential of iron materials for anaerobic azo dye treatment, a comprehensive synthesis and evaluation based on individual-related research studies, which have not been conducted to date, are necessary. This review provides, for the first time, an extensive and detailed overview of the utilization of iron materials for azo dye treatment, with a focus on decolorization. It assesses the treatment potential, analyzes the influencing factors and their impacts, and proposes metabolic pathways to enhance anaerobic dye treatment using iron materials. The physicochemical characteristics of iron materials are also discussed to elucidate the mechanisms behind the enhanced bioreduction of azo dyes. This study further addresses the current obstacles and outlines future prospects for industrial-scale application of iron-coupled treatment systems.

Address: Department of Science of Technology Innovation, Nagaoka University of Technology, Niigata, Japan.; Centre for Environmental and Energy Research, Ghent University Global Campus, Incheon, Republic of Korea; Department of Green Chemistry and Technology, Ghent University, Centre for Advanced Process Technology for Urban Resource Recovery (CAPTURE), Ghent, Belgium.; Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata, Japan.; Department of Mechanical Engineering, Nagaoka University of Technology, Niigata, Japan.; Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata, Japan; School of Chemistry and Life Sciences, Hanoi University of Science and Technology, Hanoi, Viet Nam. Electronic address: [email protected].; School of Environmental Science and Technology, Hanoi University of Science and Technology, Hanoi, Viet Nam.; Department of Science of Technology Innovation, Nagaoka University of Technology, Niigata, Japan; Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata, Japan.

DOI: 10.1016/j.envres.2024.119418

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MeSH Terms: Azo Compounds, Coloring Agents, Wastewater, Water Pollutants, Chemical, Iron, Waste Disposal, Fluid, Water Decolorization