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Enhanced metal removal from aqueous solution by Fenton activated macrophyte biomass

Miretzky , Patricia ; Muñoz , Carolina

Desalination, 2011, Vol.271(1), pp.20-28 [Tạp chí có phản biện]

ISSN: 0011-9164

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  • Nhan đề:
    Enhanced metal removal from aqueous solution by Fenton activated macrophyte biomass
  • Tác giả: Miretzky , Patricia ; Muñoz , Carolina
  • Chủ đề: Models ; Biomass ; Desalination ; Economics ; Correlation ; Adsorption ; Eichhornia Crassipes ; Water Pollution ; Ph ; Temperature
  • Là 1 phần của: Desalination, 2011, Vol.271(1), pp.20-28
  • Mô tả: Eichhornia crassipes biomass was modified by Fenton treatment and its effectiveness for Zn²⁺ removal from contaminated water was investigated. The Fenton activation process was optimized by varying pH, contact time, temperature, macrophyte biomass/volume Fenton reagent ratio, and Fe/H₂O₂ ratio. The efficiency of the Zn²⁺ sorption process under different experimental conditions was also determined. Experimental data showed good fitting to Langmuir Freundlich and Dubinin–Radushkevich isotherm models. Maximum sorption capacity was 0.114 and 0.203mmolg⁻¹ for raw and Fenton activated biomass (dose 5.0gL⁻¹, pH 6.0), increasing 78% after Fenton activation. Adsorption of Zn²⁺ to activated biomass increased as the temperature increased. The thermodynamic parameters suggested that the process was spontaneous, governed by chemical adsorption and endothermic in nature. The kinetics of the Zn²⁺ adsorption was tested by five models (pseudo-first-order, pseudo-second order, Elovich, intraparticle diffusion and Bangham diffusion models). The correlation coefficients for the pseudo-second order kinetic model were the highest suggesting a chemical reaction mechanism although intraparticle diffusion could not be discarded. The practical implication of this study is the development of an effective and economic technology for Zn²⁺ removal from contaminated waters, which is especially useful when macrophyte material is locally available. ; p. 20-28.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0011-9164

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