Removal of acetaldehyde gas using wet scrubber coupled with photo-Fenton reaction

• Main Authors: Masahiro Tokumura, Atsushi Mizukoshi, Miyuki Noguchi, Yuko Wada, Yuri Usami, Takako Yamaki, Yukio Yanagisawa
• Format: Article
• Language: English
• Published: AIMS Press 2016-03-01
• Series: AIMS Environmental Science
• Subjects: Acetaldehyde; air-cleaning method; chemical scrubbing; photo-Fenton reaction; wet scrubber
• Online Access: http://www.aimspress.com/environmental/article/710/fulltext.html

The feasibility of the combined air-cleaning method, which consisted of a wet scrubber and the photo-Fenton reaction, in the removal of gaseous acetaldehyde was evaluated. An acetaldehyde-gas removal efficiency of 99% was achieved in the one-pass test (residence time of 17 s) using an inlet acetaldehyde-gas concentration of 1000 ppb at an initial total-iron-ion concentration of 50 mg L⁻¹ and initial hydrogen peroxide concentration of 630 mg L⁻¹. Even at the low initial total-iron-ion concentration of 4 mg L⁻¹, a removal efficiency of 92% was achieved. The acetaldehyde removal efficiency was relatively independent of the initial hydrogen peroxide concentration. UV irradiation further augmented the rate of the photo-Fenton reaction leading to enhanced acetaldehyde-gas removal.