摘要
采用微波改性、硝酸改性、磷酸改性及氨水改性等方法改性活性碳纤维(ACF-0),依次标记为ACF-1、ACF-2、ACF-3和ACF-4.以改性前后的活性碳纤维为阴极,电芬顿催化处理苯酚模拟废水,考察不同的改性方法对H2O2生成量、COD去除率、苯酚去除率及其中间产物的影响.结果表明,微波改性活性碳纤维的吸附性能及电催化活性最优,相比未改性活性碳纤维,经微波或酸碱改性后的活性碳纤维反应体系中,H2O2生成量均有所增加.苯酚在各电芬顿催化体系中的去除率大小依次是:ACF-1>ACF-3>ACF-4>ACF-2>ACF-0;COD去除率大小依次是:ACF-1>ACF-4>ACF-3>ACF-2>ACF-0,说明微波及酸碱改性有利于提高活性碳纤维的催化性能.此外,苯酚降解中间产物的生成也会受到改性方法的影响.
Microwave-modified activated carbon fiber（ ACF-1）,nitric acid-modified activated carbon fiber（ ACF-2）,phosphoric acid-modified activated carbon fiber（ ACF-3） and ammonia-modified activated carbon fiber（ ACF-4） were successfully fabricated.The electro-Fenton catalytic activities of modified activated carbon fiber were evaluated using phenol as a model pollutant. H2O2formation,COD removal efficiency and phenol removal efficiency were investigated compared with the unmodified activated carbon fiber（ ACF-0）. Results indicated that ACF-1 showed the best adsorption and electrocatalytic activity. Modification was in favor of the formation of H2O2. The performance of different systems on phenol degradation and COD removal were ACF-1〉 ACF-3〉 ACF-4〉 ACF-2 〉ACF-0 and ACF-1〉 ACF-4 〉ACF-3 〉ACF-2 〉ACF-0,respectively,which confirmed that electrocatalytic activities of modified activated carbon fiber were better than the unmodified. In addition,phenol intermediates were not the same while using different modified activated carbon fibers.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2014年第7期2627-2632,共6页
Environmental Science
关键词
活性碳纤维改性
电芬顿
微波
硝酸
磷酸
氨水
activated carbon fiber modification
electro-Fenton
microwave
nitric acid
phosphoric acid
ammonia
