化学
膜
膜污染
降级(电信)
催化作用
光催化
结垢
矿化(土壤科学)
核化学
化学工程
色谱法
制浆造纸工业
过滤(数学)
水处理
环境工程
有机化学
电信
统计
生物化学
工程类
计算机科学
氮气
数学
作者
Shaobin Sun,Hong Yao,Wanyi Fu,Shan Xue,Zhang Wen
标识
DOI:10.1016/j.jhazmat.2019.121955
摘要
Micropollution such as pharmaceutical residuals potentially compromises water quality and jeopardizes human health. This study evaluated the photo-Fenton ceramic membrane filtration toward the removal of sulfadiazine (SDZ) as a common antibiotic chemical. The batch experiments verified that the photo-Fenton reactions with as Goethite (α-FeOOH) as the photo-Fenton catalyst achieved the degradation rates of 100% within 60 min with an initial SDZ concentration of 12 mg·L−1. Meanwhile, a mineralization rate of over 80% was obtained. In continuous filtration, a negligible removal rate (e.g., 4%) of SDZ was obtained when only filtering the feed solution with uncoated or catalyst-coated membranes. However, under Ultraviolet (UV) irradiation, both the removal rates of SDZ were significantly increased to 70% (no H2O2) and 99% (with H2O2), respectively, confirming the active degradation by the photo-Fenton reactions. The highest apparent quantum yield (AQY) reached up to approximately 25% when the UV254 intensity was 100 μW·cm-2 and H2O2 was 10 mmol·L−1. Moreover, the photo-Fenton reaction was shown to effectively mitigate fouling and prevent flux decline. This study demonstrated synchronization of photo-Fenton reactions and membrane filtration to enhance micropollutant degradation. The findings are also important for rationale design and operation of photo-Fenton or photocatalytic membrane filtration systems.
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