催化作用
膜
纳米纤维
化学工程
陶瓷膜
纳米颗粒
过滤(数学)
陶瓷
化学
废水
降级(电信)
材料科学
环境工程
有机化学
电信
生物化学
统计
数学
计算机科学
工程类
作者
Yulong Yang,Wanyi Fu,Xixi Chen,Li Chen,Congyu Hou,Tianhao Tang,Xihui Zhang
标识
DOI:10.1016/j.jhazmat.2022.129168
摘要
Catalytic ceramic nanofiber membranes ([email protected]) were prepared by anchoring Mn2O3 nanoparticles on the pits of attapulgite (APT) nanofibers via an impregnation and in-situ precipitation method. An integrated catalytic ozonation/membrane filtration process applying [email protected] was employed to degrade sulfamethoxazole (SMX) and the removal achieved up to 81.3% during a 7-h continuous filtration. The reactive oxygen species (ROS) quenching and radical detection experiments were conducted to determine the contribution of 1O2, ·OH and O2·- towards the catalytic degradation of SMX. Moreover, [email protected] exhibited wide applicability for real water matrix and the total removal of various kinds of emerging contaminants in real hospital wastewater reached up to 98.5%. The excellent performances of [email protected] were attributed to the nano-confinement effect in the membrane layer. First, anchoring Mn2O3 nanoparticles on the pits of the APT surface suppressed the growth and aggregation of nanosized Mn2O3, providing abundant reactive sites for catalytic ozonation. Second, the interlaced APT nanofibers formed nano-sized network structures, where ROS and SMX were confined in close vicinity and ROS have more chances to attack SMX. This work provides a promising strategy for the preparation of catalytic ceramic membrane with high catalytic efficiency for degradation of emerging contaminants in water.
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