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• W4309477231 endingPage "140475" @default.
• W4309477231 startingPage "140475" @default.
• W4309477231 abstract "• Persulfate (PS) activation by mesoporous carbon hollow spheres (MCHS) was investigated. • MCHS showed tetracycline (TC) degradation at low catalyst dosage (10 mg L −1 ). • TC degradation in PS/MCHS system occurred via non-radical pathway. • MCHSs have good transportation capacity in ISO sand column. • Toxicity tests showed that MCHS had no adverse effects on D. magna morbidity. Remediation of organic contaminants through advanced oxidation process hold great promise for both ground and surface water environments. Despite the fact, the treatment efficiency depends on multiple factors, i.e., catalyst dosage, persulfate/peroxymonosulfate activation capability, and catalyst toxicity to aquatic creatures. Herein, we aimed to demonstrate the potential of the mesoporous carbon hollow sphere (MCHS) catalyst in persulfate activation for advanced oxidation in pure and groundwater matrix by choosing tetracycline as a model compound. Surface properties of MCHS were examined using multiple characterization techniques and the data revealed that MCHS is benefited by high specific surface area, numerous mesopores, and an excellent degree of particle dispersion. The results of this study indicate that pH, catalyst dosage, and persulfate and tetracycline concentrations influence tetracycline’s degradation rate. Features like colloidal nature, high specific surface area (>1200 m 2 g -1 ), and porosity of MCHS allow for very low catalyst dosage (10 mg L -1 ). Electron spin resonance (ESR) and scavenger studies showed that the TC degradation in persulfate/MCHS system is dominated by 1 O 2 rather than • OH, and SO 4 •– radical species. Electrochemical study confirmed that electrons are transferred from tetracycline to the persulfate/MCHS complex during oxidation reaction. Additionally, the tetracycline degradation performance in natural groundwater matrices outperforms the persulfate/MCHS pure water system. Ecotoxicity study revealed the survival rate of Daphnia magna neonates is ˃95% if MCHS is <12 mg L -1 ." @default.
• W4309477231 created "2022-11-28" @default.
• W4309477231 creator A5008938526 @default.
• W4309477231 creator A5056091208 @default.
• W4309477231 date "2023-02-01" @default.
• W4309477231 modified "2023-10-01" @default.
• W4309477231 title "Engineered mesoporous hollow carbon spheres for pollutant degradation: Disclosing catalytic activity, matrix effect, transport, and aquatic ecotoxicity" @default.
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• W4309477231 doi "https://doi.org/10.1016/j.cej.2022.140475" @default.
• W4309477231 hasPublicationYear "2023" @default.
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