%0 Journal Article
%T Mechanisms of UV Photodegradation on Performance of a Subsequent Biofilter Treating Gaseous Chlorobenzene<br>紫外光降解对生物过滤塔去除氯苯性能的影响机制研究
%A WANG Can
%A XI Jin-ying
%A HU Hong-ying
%A YAO Yuan
%A <br>王灿
%A 席劲瑛
%A 胡洪营
%A 姚远
%J 环境科学
%D 2012
%I 
%X 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 m2·m-3 compared with the value of 784 m2·m-3 without UV pretreatment.
%K volatile organic compounds (VOCs)
%K chlorobenzene
%K UV photodegradation
%K biofilter
%K mechanism<br>挥发性有机物
%K 氯苯
%K 紫外光降解
%K 生物过滤塔
%K 机制
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=4189763B19B8AD4514FDFAE3F16F8015&yid=99E9153A83D4CB11&vid=27746BCEEE58E9DC&iid=CA4FD0336C81A37A&sid=9971A5E270697F23&eid=933658645952ED9F&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=10