Degradation of methylene blue by radio frequency plasmas in water under ultraviolet irradiation

The degradation of methylene blue by radio frequency (RF) plasmas in water under ultraviolet (UV) irradiation was studied experimentally. When the methylene blue solution was exposed to RF plasma, UV irradiation from a mercury vapor lamp enhanced degradation significantly. A lamp without power suppl...

Full description

Saved in:
Bibliographic Details
Published in:Journal of hazardous materials 2010-02, Vol.174 (1), p.473-476
Main Authors: Maehara, Tsunehiro, Nishiyama, Kyohei, Onishi, Shingo, Mukasa, Shinobu, Toyota, Hiromichi, Kuramoto, Makoto, Nomura, Shinfuku, Kawashima, Ayato
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Degradation
Exact sciences and technology
Hydrogen peroxide
Hydrogen Peroxide - chemistry
Methylene blue
Methylene Blue - chemistry
Methylene Blue - radiation effects
Photolysis
Pollution
Radio Waves
Reactors
RF plasma
Ultraviolet
Ultraviolet Rays
Water
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The degradation of methylene blue by radio frequency (RF) plasmas in water under ultraviolet (UV) irradiation was studied experimentally. When the methylene blue solution was exposed to RF plasma, UV irradiation from a mercury vapor lamp enhanced degradation significantly. A lamp without power supply also enhanced degradation since weak UV light was emitted weakly from the lamp due to the excitation of mercury vapor by stray RF power. Such an enhancement is explained by the fact that after hydrogen peroxide is produced via the recombination process of OH radicals around the plasma, OH radicals reproduced from hydrogen peroxide via the photolysis process degrade methylene blue.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2009.09.076