Removal of 26 corticosteroids, potential COVID-19 remedies, at environmentally relevant concentrations in water using UV/free chlorine, UV/monochloramine, and UV/hydrogen peroxide
| Autor: | Ai Zhang, Yongqiang Ding, Ai Jia, Minkyu Park, Kevin D. Daniels, Xuhao Nie, Shimin Wu, Shane A. Snyder |
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| Přispěvatelé: | Nanyang Environment and Water Research Institute |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Environmental Science: Water Research & Technology. 8:1078-1091 |
| ISSN: | 2053-1419 2053-1400 |
| DOI: | 10.1039/d1ew00919b |
| Popis: | As a class of endocrine disrupting compounds (EDCs), corticosteroids (CSs) have attracted increasing attention due to their large excretion masses and toxic effects. However, compared to the very well-studied estrogens and androgens, few studies have been made dealing with the removal of CSs at environmentally relevant concentrations using advanced water and wastewater treatment processes. In this study, degradation performances of 26 natural and synthetic CSs in secondary effluent at environmentally relevant concentrations were comparatively investigated during UV/free chlorine (UV/Cl2), UV/monochloramine (UV/NH2Cl) and UV/hydrogen peroxide (UV/H2O2) treatments. The 26 CSs could be divided into two groups: UV sensitive CSs, which have two double bonds in ring A (Δ1,4), and UV insensitive CSs, which have only one double bond in ring A (Δ4). The UV sensitive CSs could be effectively removed (removal efficiency >60%) by a UV dose of 100 mJ cm−2 while the UV insensitive CSs could be removed (removal efficiency >40%) by a UV dose of 800 mJ cm−2. The removal efficiencies of UV insensitive CSs increased with the increase of UV dose. Most of the CSs were poorly removed by sole Cl2, NH2Cl, or H2O2 treatment (removal efficiency |
| Databáze: | OpenAIRE |
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