油菜籽衍生的生物炭负载CoFe₂O₄活化过氧单硫酸盐降解双酚A

Degradation of Bisphenol A by Rapeseed-Derived Biochar Loaded with CoFe₂O₄-Activated Peroxymonosulfate

本文采用油菜籽作为炭源,铁酸钴作为负载物合成了CoFe2O4@NC复合催化剂。该催化剂作为过氧单硫酸盐(PMS)的活化剂降解双酚A (BPA)。利用了SEM、XRD、XPS和FT-IR研究了所制催化剂的理化性质。通过不同催化剂体系、不同催化剂投加量,不同PMS投加量和溶液pH等因素验证了催化剂活化PMS降解BPA的能力。结果表明:当催化剂和PMS投加量均为0.2 g/L时90 min降解了95.87%的20 mg/L BPA,在弱碱性情况下反应加速,90 min降解100% 20 mg/L BPA。活性物质猝灭实验证实了,自由基途径和非自由基途径对降解BPA均发挥作用,且对于降解BPA的贡献1O2 > > > ·OH。

In this paper, CoFe2O4@NC composite catalyst was synthesized using rapeseed as a carbon source and cobalt ferrate as a loader. The catalyst was used as an activator for the degradation of bisphenol A (BPA) by peroxomonosulfate (PMS). SEM, XRD, XPS, and FT-IR were utilized to investigate the physicochemical properties of the fabricated catalysts. The ability of the catalysts to activate PMS to degrade BPA was verified by different catalyst systems, different catalyst dosages, different PMS dosages and solution pH. The results showed that 95.87% of 20 mg/L BPA was degraded in 90 min when both the catalyst and PMS dosage were 0.2 g/L, and the reaction was accelerated in weak alkaline condition, and 100% of 20 mg/L BPA was degraded in 90 min. The active substance burst experiment confirms that both the free radical pathway and the non-radical pathway played a role in the degradation of BPA, and that the contribution of the free radical pathway to BPA degradation was as follows 1O2 > > > ·OH.