Mineralization of Rhodamine B dye in water using dielectric barrier plasma jet with process optimization
To address the persistent challenge of textile wastewater treatment, a non-thermal dielectric barrier discharge (DBD) plasma jet process was developed and optimized for the effective removal and mineralization of Rhodamine B dye from synthetic wastewater. Using the Box–Behnken design and response su...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025008679 |
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| Summary: | To address the persistent challenge of textile wastewater treatment, a non-thermal dielectric barrier discharge (DBD) plasma jet process was developed and optimized for the effective removal and mineralization of Rhodamine B dye from synthetic wastewater. Using the Box–Behnken design and response surface methodology, the influence of three key process parameters- applied power (30–60 W), power frequency (10–20 kHz), and argon gas flow rate (0.5–1.5 L/min)- and their interactions on the decomposition of RhB were systematically evaluated and optimized for an initial RhB concentration of 100 mg/L. Under optimal conditions of 60 W applied power, 20 kHz frequency, and 1.5 L/min gas flow rate, the DBD plasma jet achieved a high RhB removal efficiency of 96% within 20 min, with an energy efficiency of 0.193 g/kWh and a G50 energy yield of 0.266 g/kWh. The process followed pseudo-first-order kinetics, with mineralization of the dye evidenced by a 94% reduction in chemical oxygen demand, 92% reduction in total organic carbon, and the formation of nitrate and ammonium ions. The degradation pathway of RhB, involving de-ethylation, chromophore cleavage, and subsequent mineralization, was proposed based on optical emission spectroscopy and liquid chromatography-mass spectrometry analyses. This study demonstrates the potential of the DBD plasma jet as an efficient and sustainable method for the treatment of dye-laden wastewater. |
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| ISSN: | 2590-1230 |