title: Remediation and phytotoxicity of decabromodiphenyl ether contaminated soil by zero valent iron nanoparticles immobilized in mesoporous silica microspheres.
abstract: Polybrominated diphenyl ethers (PBDEs) are a new class of environmental pollutants which easily accumulated in the soil, especially at e-waste sites. However, knowledge about their phytotoxicity after degradation is not well understood. Nano zero valent iron (nZVI) immobilized in mesoporous silica microspheres covered with FeOOH (SiO2@FeOOH@Fe) synthesized in this study was utilized to remove decabromodiphenyl ether (BDE209) from soil. Results revealed that the removal efficiency of BDE209 can be achieved 78% within 120 h using a dosage of 0.165 g g(-1) and a pH of 5.42. Furthermore, the removal efficiency enhanced with increasing soil moisture content and the decreasing of initial BDE209 concentration. Phytotoxicity assays (biomass and germination rate, shoots and roots elongation of Chinese cabbage) were carried out to provide a preliminary risk assessment of treated soil for the application of SiO2@FeOOH@Fe.
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: pengyh@scnu.edu.cn.
authors.forename: Wen
authors.initials: W
authors.lastname: Cheng
authors.affiliation: Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou, 510006, China; Department of Science and Environmental Studies, The Hong Kong Institute of Education, Hong Kong, 00852, China.
authors.forename: Pokeung Eric
authors.initials: PE
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. Electronic address: zhqfang@scnu.edu.cn.
authors.forename: Zhanqiang
authors.initials: Z
authors.lastname: Fang
mesh_terms: D001937:Brassica / Q000187:drug effects / Q000254:growth & development; D052918:Environmental Restoration and Remediation / Q000379:methods*; D055768:Halogenated Diphenyl Ethers / Q000633:toxicity; D007501:Iron / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry; D008863:Microspheres; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development; D012822:Silicon Dioxide / Q000737:chemistry; D012989:Soil Pollutants / Q000633:toxicity; D018675:Toxicity Tests / Q000379:methods*
chemical_list: D055768:Halogenated Diphenyl Ethers; D012989:Soil Pollutants; D012822:Silicon Dioxide; D007501:Iron; C010902:decabromobiphenyl ether
keywords: Chinese cabbage; Nanoparticles; Phytotoxicity; Polybrominated diphenyl ethers; Remediation; Soil