双酚A
降级(电信)
过硫酸盐
催化作用
废水
化学
材料科学
光催化
无机化学
化学工程
光化学
尖晶石
钴
核化学
环境工程
有机化学
环境科学
计算机科学
冶金
环氧树脂
工程类
电信
作者
Mona Moradi,Babak Kakavandi,Ashkan Bahadoran,Stefanos Giannakis,Emad Dehghanifard
标识
DOI:10.1016/j.seppur.2021.120313
摘要
This study was designed to enhance wastewater treatment by the UVC/persulfate process via its coupling with spinel cobalt ferrite (SCF) nanoparticles anchoring graphitic carbon nitride (g-C3N4, GCN). The performance of [email protected] was assessed against bisphenol A (BPA) degradation as a model recalcitrant contaminant. Characterization tests confirmed the successful preparation of [email protected] with high photocatalytic activity and excellent capability in PS activation compared to plain SCF or pristine GCN. The results strongly pointed out that [email protected] combined with UVC and PS is capable to rapidly degrade BPA with a remarkable synergistic effect. Under optimum conditions (pH: 9.0, [email protected]: 0.3 g/L and PS: 4.0 mM), complete elimination of BPA (40 mg/L) was achieved in 15 min with excellent degradation kinetics (0.32 min−1). Scavenging experiments ascertained the generation of h+, 1O2 , O2•− , SO4•−, HO• species in [email protected]/PS/UVC system, indicating that both radical and non-radical mechanisms were involved during the degradation process. Furthermore, the developed process displayed a satisfactory performance for effective treating BPA-contaminated wastewater samples. Over 95% BPA was removed by the system after five catalyst reuse cycles, suggesting a cost-effectiveness potential in the reusability of [email protected] A comprehensive mechanistic pathway for BPA degradation was proposed based on the reactive species and intermediates identified: A S-scheme heterojunction mechanism of photo-generated electron/hole pairs transfer in the [email protected] catalyst was found. Overall, our results present a promising technique with synergistic character for intensification of wastewater treatment.
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