Ball milling-assisted preparation of sludge biochar as a novel periodate activator for nonradical degradation of sulfamethoxazole: Insight into the mechanism of enhanced electron transfer. (1st January 2023)

• Record Type: Journal Article
• Authors: He, Liuyang; Yang, Shangding; Yang, Lie; Shen, Shitai; Li, Yulong; Kong, Dejin; Chen, Zhuqi; Yang, Shengmao; Wang, Jia; Wu, Li; Zhang, Zulin
• Is Part Of: Environmental pollution. Volume 316(2023)part 2
• Publication Date: 2023-01-01
• Subjects: Periodate -- Magnetic sludge biochar -- Ball milling -- Electron transfer -- Nonradical degradation; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2022.120620
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: The non-radical pathway of periodate (PI) activation for the removal of persistent organic contaminants has received increasing attention due to its higher stability and oxidative advantages. In this study, the degradation of sulfamethoxazole (SMX) by ball mill treated magnetic sludge biochar (BM-MSBC) through activation of PI by electron transfer mechanism was reported. Experimental and characterization results showed that the ball milling treatment resulted in a better pore and defect structure, which also significantly enhanced the electron transfer capacity of the sludge biochar. The BM-MSBC/PI system exhibited notable dependence of activator concentration and initial pH, while the effect of PI concentration was not significant. The coexisting substances (common anions and natural organic matters) hardly affect the degradation of SMX in the BM-MSBC/PI system. The phytotoxicity experiments suggested that the treatment of BM-MSBC/PI system could significantly reduce the biological toxicity of SMX solution. This study provides a novel, economical, and facile modification method for the application of sludge biochar in advanced oxidation processes. Graphical abstract: Image 1 Highlights: Ball milling enhanced the electron transfer capacity of sludge biochar. Removal of sulfamethoxazole through an electron transfer mechanism. Sulfamethoxazole was degraded with a significant reduction in biotoxicity. Ball milling provides a convenient and solvent-free modification method.