化学
超纯水
结垢
膜污染
超滤(肾)
流出物
膜
过滤(数学)
饮用水净化
核化学
色谱法
化学工程
环境工程
有机化学
生物化学
统计
工程类
数学
作者
Yufei Wang,Na Wei,Jia Zeng,Yaochen Wu,Tong Zhou,Guohan Liu,Qiushan Liu,Jinsong Guo
标识
DOI:10.1016/j.seppur.2023.123522
摘要
The nitrogen-doping carbon nanotube modified polyethersulfone membrane ([email protected]) was prepared by vacuum-assisted filtration. The catalytic activity and anti-fouling capacity of [email protected]/peroxymonosulfate (PMS) system were both systematically investigated. Selecting ethylenediamine tetra(methylene phosphonic acid) (EDTMP) as a target phosphonate, the [email protected]/PMS system degraded almost 100% of EDTMP, and about 60% of the total phosphorus (TP) in EDTMP could be transformed into orthophosphate (PO43−) within 1 min. Scavenger experiments and electron paramagnetic resonance (EPR) technique verified that the surface-bound radicals were mainly contributed the degradation and transformation of EDTMP in the [email protected]/PMS system. The presence of HCO3−, SO42− and NOM weakened the catalytic reactions, nevertheless, the [email protected]/PMS system still showed considerable effectiveness on the transformation of EDTMP in real sewage effluent. Moreover, the anti-fouling experiment proved that [email protected]/PMS system were superior on the removal of fluorescent components in the real sewage effluent, and their removal rates for the dissolved organic matter (DOC) and UV absorbance at 254 nm (UV254) were also improved. During the filtration cycles, the [email protected]/PMS system mitigated the membrane fouling significantly, which had been verified by the slower decline of normalized flux, less ultrapure water flux loss rates and higher ultrapure water flux recovery rates. This study provided a novel but simple way for effective EDTMP decontamination, at the same time, confirmed the potential of [email protected] membrane coupled with PMS activation on anti-fouling and water purification ability.
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