Work

Deep insight into methyl blue decolorization using non-thermal pulsed plasma: experimental and modeling approaches

Year: 2025

Type: article

Abstract: This study investigates the rapid decolorization of methyl blue (MB) dye in water using a novel atmospheric non-thermal pulsed plasma system with a multi-pin-to-plate electrode configuration. The system integrates optical emission spectroscopy, UV–visible absorption spectroscopy, and response surface methodology for experimental design. A global kinetic model simulating over 150 species and 3500 reactions was employed to elucidate degradation mechanisms. Under optimized conditions, 97% of MB (initial concentration: 5 ppm) was decolorized within 120 s of plasma treatment. Significant increases in reactive species concentrations (·OH, O 3 ) were observed, alongside changes in water chemistry (pH, ORP, EC). These findings demonstrate the efficiency and scalability of the proposed plasma system for water treatment, providing new mechanistic insights and a framework for optimizing plasma-based degradation of organic pollutants.

Source: Scientific Reports

DOI: 10.1038/s41598-025-16554-9

Authors: Saeed Karimian, Mahdi Shariat, Hamidreza Mashayekhi

Institutions: Vali Asr University of Rafsanjan, Shahid Bahonar University of Kerman

Language: English

Topic: Plasma Applications and Diagnostics

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: gold

Estimated APC paid: $2,690