title: Comparisons of the reactivity, reusability and stability of four different zero-valent iron-based nanoparticles.
abstract: Our previous reports showed that nano zero-valent iron (nZVI), steel pickle liquor for the synthesis of nZVI (S-nZVI), nZVI immobilised in mesoporous silica microspheres (SiO2@FeOOH@Fe) and nano Ni/Fe bimetallic particles (Ni/Fe) have been proved to show good property for elimination of polybrominated diphenyl ethers (PBDEs). However, it is necessary to compare their reactivity, reusability and stability when applied to in situ remediation. In this study, the performances of different iron-based nanoparticles were compared through reusability, sedimentation and iron dissolution experiments. The SiO2@FeOOH@Fe and Ni/Fe nanoparticles were shown to have higher reusability and stability, as they could be reused more than seven times, and that the SiO2@FeOOH@Fe can effectively avoid leaching iron ions into the solution and causing secondary pollution in the reaction. This study may serve as a reference for PBDE remediation in the future.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou 510006, China.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Xie
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou 510006, 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 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou 510006, China.
authors.forename: Xinhong
authors.initials: X
authors.lastname: Qiu
authors.affiliation: Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou 510006, China; Department of Science and Environmental Studies, Hong Kong Institute of Education, Hong Kong 00852, Hong Kong, China. Electronic address: etsang@ied.edu.hk.
authors.forename: Eric Pokeung
authors.initials: EP
authors.lastname: Tsang
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou 510006, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Liang
mesh_terms: D004785:Environmental Pollutants / Q000302:isolation & purification*; D052918:Environmental Restoration and Remediation; D055768:Halogenated Diphenyl Ethers / Q000302:isolation & purification*; D007501:Iron / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D012995:Solubility
chemical_list: D004785:Environmental Pollutants; D055768:Halogenated Diphenyl Ethers; D012822:Silicon Dioxide; D009532:Nickel; D007501:Iron; C010902:decabromobiphenyl ether
keywords: Modify; Nano zero-valent iron; Reusability; Stability