| Title: | [Mechanisms of UV photodegradation on performance of a subsequent biofilter treating gaseous chlorobenzene] |
| Author(s): | Wang C; Xi JY; Hu HY; Yao Y; |
| Address: | "School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China. wangcan04@mails.tsinghua.edu.cn" |
| ISSN/ISBN: | 0250-3301 (Print) 0250-3301 (Linking) |
| Abstract: | "To provide insight into effects of UV pretreatment on a subsequent biofilters, the mechanisms of UV pretreatment on biofilter performance were further studied. Results showed that gaseous chlorobenzene UV photodegradation products resulted in a pH decrease from 6-8 to 4-7 in filter bed. Ozone produced by UV photodegradation changed the physical properties of biofilm by reducing biofilm thickness and oxidizing surface part of the extra-cellular polymer substance, which promoted the oxygen, nutrient and pollutant transfer to biofilm. The reduction of biofilm thickness further resulted in the improvement of filter bed's physical properties by providing a higher specific surface area of 880 m x m(-3) compared with the value of 784 m2 x m(-3) without UV pretreatment" |
| Keywords: | "Air Pollutants/chemistry/*isolation & purification Biodegradation, Environmental Bioreactors/microbiology Chlorobenzenes/chemistry/*isolation & purification Filtration/*methods Gases Ozone/chemistry Photochemistry/*methods *Ultraviolet Rays Volatile Organ;" |
| Notes: | "MedlineWang, Can Xi, Jin-Ying Hu, Hong-Ying Yao, Yuan chi English Abstract Research Support, Non-U.S. Gov't China 2012/03/29 Huan Jing Ke Xue. 2012 Jan; 33(1):32-6" |
