title: Ultrasonic Fenton-like catalytic degradation of bisphenol A by ferroferric oxide (Fe₃O₄) nanoparticles prepared from steel pickling waste liquor.
abstract: In this study, Fe3O4 NPs (named as Fe3O4 NPs-PO) were prepared by steel pickling waste liquor to reduce the cost of preparation, and were compared with those obtained by the common co-precipitation method (named as Fe3O4 NPs-CP) which prepared from chemical reagent using BET, XRD, XPS, TEM and SEM techniques. The results indicated that Fe3O4 NPs-PO nanoparticles mainly existed in the form of Fe3O4 and appeared to be roughly spherical in shape with a size range of 20-50 nm. The heterogeneous Fenton-like catalytic capacity of Fe3O4 NPs-PO in US+Fe3O4+H2O2 system was comprehensively investigated. BPA could be degraded within a wide pH range of 7-10. The removal efficiencies of BPA were close to 100% and about 45% total organic carbon (TOC) in solution was eliminated at the optimized conditions. It was found that ·OH radicals which mainly caused the degradation of BPA were promptly generated due to the catalysis of the Fe3O4 NPs-PO. Furthermore, the comparative study of catalytic activity, stability and reusability between Fe3O4 NPs-PO and Fe3O4 NPs-CP showed that the two catalysts both remained good activity after several reaction cycles and no significant change in composition and structure was observed, the loss of catalyst was negligible, which demonstrated that Fe3O4 NPs-PO were promising in ultrasonic Fenton-like process to treat refractory organics.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 51006, China; Department of Environmental Monitoring, Guangdong Vocational College of Environmental Protection Engineering, Foshan 528216, China.
authors.forename: Ruixiong
authors.initials: R
authors.lastname: Huang
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 51006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou 51006, China. Electronic address: zhqfang@scnu.edu.cn.
authors.forename: Zhanqiang
authors.initials: Z
authors.lastname: Fang
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 51006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou 51006, China.
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Fang
authors.affiliation: Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou 51006, China; Department of Science and Environmental Studies, Hong Kong Institute of Education, 00852, Hong Kong China.
authors.forename: Eric Pokeung
authors.initials: EP
authors.lastname: Tsang
keywords: Bisphenol A; Degradation; Nanoparticles; Steel pickling waste liquor; Ultrasonic Fenton-like