Removal of Rhodamine B Dye by Plasma Jet Oxidation Process

Quynh Xuan Thi Le, Hong Quan Tran, Thu Ha Trinh, Thuan Dao Nguyen
Author affiliations

Authors

  • Quynh Xuan Thi Le Laboratory of Plasma Technology, Institute of Materials Sciences (IMS), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam and Graduate University of Science and Technology (GUST), VAST
  • Hong Quan Tran Laboratory of Plasma Technology, Institute of Materials Sciences (IMS), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam and Graduate University of Science and Technology (GUST), VAST
  • Thu Ha Trinh Laboratory of Environmental and Bioorganic Chemistry, Institute of Chemistry, Vietnam Academy of Science and Technology
  • Thuan Dao Nguyen Laboratory of Plasma Technology, Institute of Materials Sciences (IMS), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam https://orcid.org/0000-0003-2658-1790

DOI:

https://doi.org/10.15625/0868-3166/15558

Keywords:

cold plasma, plasma jet, oxidation, organic dye removal, Rhodamine B

Abstract

Recently, nonthermal atmospheric pressure plasma has been developed as a novel tool in removal of water pollutants. Rhodamine B dye, widely used in textiles and biology, is toxic to both humans and animals, hence removing residual Rhodamine B in solution is necessary. In this work, we have setup a cold plasma jet system and used it to effectively remove Rhodamine B in the solution. We have shown that the main oxidation substance responsible to remove Rhodamine B is the hydroxyl radical (•OH). By studying the effect of the hydrogen peroxide (H2O2) concentration in the initial and later was produced in the solution, the plasma power, and the Ar gas flow speed on the dye remove rate, we have identified 2 main reaction pathways to generate hydroxyl radical (•OH). Both of these reaction pathways involve high-energy electrons interacting with water and O2 in the solution and in the ambient air. Our work provides important information to understand the mechanism of dye removal by cold plasma treatment.

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Published

06-01-2021

How to Cite

[1]
Q. X. T. Le, H. Q. Tran, T. H. Trinh and T. Dao Nguyen, Removal of Rhodamine B Dye by Plasma Jet Oxidation Process, Comm. Phys. 31 (2021) 95. DOI: https://doi.org/10.15625/0868-3166/15558.

Issue

Vol. 31 No. 1 (2021)

Section

Papers

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Received 02-10-2020
Accepted 20-10-2020
Published 06-01-2021