生物炭
吸附
化学
催化作用
浸出(土壤学)
化学工程
光化学
降级(电信)
无机化学
有机化学
环境科学
热解
土壤水分
土壤科学
工程类
电信
计算机科学
作者
Jingwen Pan,Baoyu Gao,Pijun Duan,Kangying Guo
标识
DOI:10.1016/j.jhazmat.2021.125413
摘要
Herein, we attempted to apply an exhausted magnetic biochar with adsorbed Cu2+ ([email protected]) directly as a PMS activator and explored the feasibility of this attempt. Density functional theory (DFT) and electrochemical analysis illuminated the adsorbed Cu2+ in [email protected] improved PMS activation and NOR degradation efficiency by elevating the adsorption capacity of PMS and performance of electron transfer. About 91.47% of norfloxacin (NOR) was rapidly degraded in [email protected]/PMS system with low Fe and Cu leaching. An in-depth mechanistic study was conducted with radical scavenging, radical capturing and solvent exchange, which demonstrated that the adsorbed Cu2+ could facilitate the formation of both different radicals and non-radical. Importantly, [email protected] can maintain a long-term stable operation and excellent catalytic performance in surface water treatment. The potential toxicity of by-product generated in the NOR degradation process was also predicated, and results suggested that most identified by-products were less toxic than NOR itself. Notably, the preparation cost of exhausted adsorbent-based catalysts could be negligible, so the expenditure of the corresponding oxidation process is reduced accordingly. Based on above, this work provides not only a low-cost exhausted biochar-based catalyst for water purification but also the insight into the PMS activation by adsorbed transition metal ions.
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