Applicability of light sources and the inner filter effect in UV/acetylacetone and UV/H2O2 processes

被引：21

作者：

Wu, Bingdang ^{[1
]}

Yang, Minghui ^{[1
]}

Yin, Ran ^{[2
]}

Zhang, Shujuan ^{[1
]}

机构：

[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Jiangsu, Peoples R China

[2] Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Clear Water Bay, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2017年 / 335卷

基金：

中国国家自然科学基金;

关键词：

Efficiency spectrum; Inner filter effect; Photonic efficiency; Acetylacetone; Hydrogen peroxide; MEDIATED PHOTOCHEMICAL PROCESSES; ACTION SPECTRUM; QUANTUM YIELD; PHOTODEGRADATION; DEGRADATION; ACTINOMETRY; TIO2; H2O2;

D O I：

10.1016/j.jhazmat.2017.04.011

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Light source is a crucial factor in the application of a photochemical process, which determines the energy efficiency. The performances of acetylacetone (AA) in conversion of aqueous contaminants under irradiation with a low-pressure mercury lamp, a medium-pressure mercury lamp, a xenon lamp, and natural sunlight were investigated and compared with those of H2O2 as reference. In all cases, AA was superior to H2O2 in the degradation of Acid Orange 7. Using combinations of the different light sources with various cut-off and band-pass filters, the spectra responses of the absorbed photons in the UV/AA and UV/H2O2 processes were determined for two colored and two colorless compounds. The photonic efficiency (phi) of the two photochemical processes was found to be target-dependent. A calculation approach for the inner filter effect was developed by taking the obtained co into account, which provides a more accurate indication of the reaction mechanisms. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：100 / 107

页数：8

共 26 条

[1] Rethinking the Concepts of Fluence (UV Dose) and Fluence Rate: The Importance of Photon-based Units - A Systemic Review [J].