Chromium removal using resin supported nanoscale zero-valent iron.
Resin supported nanoscale zero-valent iron (R-nZVI) was synthesized by the borohydride reduction method. Batch experiments were conducted to evaluate the factors affecting Cr(VI) removal. It was found that nZVI loads, resin dose, pH value and initial concentration of Cr(VI) were all important factor...
| Publicado en: | Journal of Environmental Management Vol. 128; pp. 822 - 828 |
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| Autores principales: | , , , , , |
| Formato: | Artículo |
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Academic Press Inc.
Oct2013
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=90067518&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 90067518 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 03014797 EMJ jtl: Journal of Environmental Management issn: 03014797 maglogo: N pubinfo: dt: Oct2013 vid: 128 pid: 735 pub: Academic Press Inc. artinfo: ui: 90067518 10.1016/j.jenvman.2013.06.044 ppf: 822 ppct: 6 formats: tig: atl: Chromium removal using resin supported nanoscale zero-valent iron. aug: au: Fu, Fenglian Ma, Jun Xie, Liping Tang, Bing Han, Weijiang Lin, Suya affil: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China su: Chromium removal (Sewage purification) Zero-valent iron Borohydride Scanning electron microscopy Hydrogen-ion concentration Diffraction patterns X-ray diffraction Ion exchange (Chemistry) sug: subj: Chromium removal (Sewage purification) Zero-valent iron Borohydride Scanning electron microscopy Hydrogen-ion concentration Diffraction patterns X-ray diffraction Ion exchange (Chemistry) keyword: Chromium removal Cr(VI) wastewater Nanoscale zero-valent iron (nZVI) Resin Support Chromium removal Cr(VI) wastewater Nanoscale zero-valent iron (nZVI) Resin Support ab: Resin supported nanoscale zero-valent iron (R-nZVI) was synthesized by the borohydride reduction method. Batch experiments were conducted to evaluate the factors affecting Cr(VI) removal. It was found that nZVI loads, resin dose, pH value and initial concentration of Cr(VI) were all important factors. Scanning electron microscopy showed that the nZVI particles in R-nZVI became sphere after reacting with Cr(VI). This phenomenon was attributed to the co-precipitation of Cr(III) and Fe(III) on the surface of resin. X-ray diffraction pattern confirmed that Fe diminished after the reaction. At optimum conditions, the Cr(VI) removal efficiency was 84.4% when the initial concentration of Cr(VI) was 20.0 mg/L. Regeneration of R-nZVI and resin was possible. R-nZVI can also remove Cr(III) efficiently. However, the removal mechanisms of Cr(VI) (anion) and Cr(III) (cation) are different. The former is chemical reduction, while the latter is ion exchange at pH below 6.3 and precipitation at pH above 6.3. This study demonstrates that R-nZVI has the potential to become an effective agent for treating wastewater containing Cr(VI) and Cr(III). pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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