化学
激进的
催化作用
碳纳米管
废水
活性炭
浸出(土壤学)
钴
降级(电信)
无机化学
核化学
化学工程
有机化学
吸附
废物管理
电信
环境科学
计算机科学
土壤科学
工程类
土壤水分
作者
Chuanyi Xu,Qingyou Liu,Meng Wei,Shihui Guo,Yueping Fang,Zhuobiao Ni,Xixian Yang,Shengsen Zhang,Rongliang Qiu
标识
DOI:10.1016/j.seppur.2022.121347
摘要
Catalytic activation of peroxymonosulfate (PMS) for purifying organic wastewater has been widely studied. However, the activation mechanism either by free radicals or non-radicals alone is not satisfactory efficiency. In this work, a novel advanced oxidation system based on surface oxidized metallic cobalt nanoparticles ([email protected]) encapsulated with N-doped carbon nanotubes (NCT), i.e., CCN, activated peroxymonosulfate (PMS) was designed. The CCN-PMS system showed excellent performance in the degradation for a wide range of organic pollutants, including antibiotics, dyes, and phenols. The degradation rate of 100 mL 80 mg·L-1 tetracycline hydrochloride (TC) in the system (10 mg CCN + 0.5 mM PMS) reached 92% within 30 min. The mechanism analysis of the CCN activation of PMS reveals that the NCT mainly provided the active sites for non-radical formation, while the [email protected] mainly provided the active sites for radical formation. In addition, the NCT could not only effectively reduce the leaching of Cox+, but also play a synergistic role with [email protected] in the degradation of organic pollutants. This work provides new insight into the mechanism of PMS activation by carbon-based catalysts for the efficient purification of organic wastewater.
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