方解石
化学
降级(电信)
激进的
磺胺嘧啶
食腐动物
反应性(心理学)
单线态氧
环境化学
核化学
无机化学
氧气
矿物学
有机化学
抗生素
医学
替代医学
病理
电信
生物化学
计算机科学
作者
Fuwei Sun,Tianhu Chen,Ziyang Chu,Peixun Zhai,Lei Zhu,Qiang Wang,Xuehua Zou,Dong Chen
出处
期刊:Water Research
[Elsevier]
日期:2022-05-04
卷期号:219: 118529-118529
被引量:60
标识
DOI:10.1016/j.watres.2022.118529
摘要
A system of Cu2+/calcite/PDS was constructed to degrade sulfadiazine (SDZ). Different from the traditional Cu-mediated activation, a low concentration of Cu2+ that met drinking water standards (≤ 1 mg/L) transformed into Cu(Ⅱ) solid in the presence of calcite, and then enhanced the degradation of SDZ via PDS activation over a pH range from 3 to 9. According to scavenger and chemical probe experiments, Cu(Ⅲ), rather than radicals (hydroxyl radicals and sulfate radicals) and singlet oxygen, was the predominant reactive species, which was responsible for the degradation of SDZ. Based on the results of XRD, ATR-FTIR, and CV curves et al., CuCO3 was the main complex with high reactivity for PDS activation to form Cu(Ⅲ). Moreover, detailed degradation pathways of sulfadiazine were proposed according to the UPLC-ESI-MS/MS and their toxicity was predicted by ECOSAR. Besides, the real water matrix would not seriously affect the degradation of SDZ in the Cu2+/calcite/PDS system. In summary, this study reveals a new insight into the synergistic effect of Cu2+ and calcite on the SDZ degradation, and promotes an understanding of the environmental benefits of natural calcite.
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