期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 7, 期 5, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2019.103287
关键词
Sulfonamides; Bubble column reactor; Immobilization; Photocatalysis; Ozonation; Fenton treatment
资金
- EU Regional Development Fund [2014-2020.4.01.16-0032]
- Estonian Ministry of Education and Research [IUT 19-4]
- European Regional Development Fund [TK 141]
- Centre of Excellence, Advanced materials and high-technology devices for energy recuperation system
In this work, four advanced oxidation processes, namely heterogeneous photocatalysis, ozonation, homogeneous and heterogeneous Fenton-like treatment, were studied separately and in combinations and compared for the degradation of a widely used sulfonamide group antibiotic, sulfamethizole. The trials were carried out in a column bubble reactor operated in semi-batch and continuous mode. The applicability of the selected processes for sulfamethizole degradation was investigated at elevated concentrations (ppm level), with subsequent successful scale-down to ppb concentration level. Among studied methods, the application of ozone-based processes demonstrated the highest sulfamethizole decomposition efficiency, with 25 mu g L-1 of antibiotic being completely degraded in three minutes, even though low ozone amounts (99 mu g O-3 min(-1)) were used, comparable to those produced by germicidal lamps. The highest target compound decomposition efficiency was shown by uncoated expanded clay-assisted ozonation, where complete sulfamethizole removal was obtained within one minute. The results show that operating at elevated concentrations to determine the performance of a micropollutant degradation method is not only acceptable but also completely justified, as the scale-down study results reflect those obtained at higher concentrations quite accurately.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据