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QIN Lijia, WANG Dongbo, LIN Rongke, LI Shi, FENG Qingge. Preparation of sludge carbon with Fenton activation and adsorption characteristics of hexavalent chromium[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5007-5012. doi: 10.12030/j.cjee.201609228
Citation: QIN Lijia, WANG Dongbo, LIN Rongke, LI Shi, FENG Qingge. Preparation of sludge carbon with Fenton activation and adsorption characteristics of hexavalent chromium[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5007-5012. doi: 10.12030/j.cjee.201609228
shu

Preparation of sludge carbon with Fenton activation and adsorption characteristics of hexavalent chromium

  • 1.

    School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China

  • 2.

    Guangxi Higher School Key Laboratory of Environmental Protection, Nanning 530004, China

  • 3.

    Scientific Research Academy of Guangxi Environmental Protection, Nanning 530022, China

  • Received Date: 19/12/2016
    Accepted Date: 28/09/2016
    Available Online: 26/08/2017
    Fund Project:
  • Using Fenton activation method to prepare activated carbon through dewatered sludge. The effects of Fenton's reagent dosage, activation time, carbonization temperature, residence time and heating rate on the preparation of sludge carbon were studied. The optimum preparation conditions are as the following:Fenton's reagent dosage is 150 mL, activation time is 2.5 h, carbonization temperature is 350℃, residence time is 1 h, heating rate is 20℃·min-1. The iodine adsorption value of sludge carbon under this optimum preparation condition is 331.90 mg·g-1, and BET specific surface area is 24.265 m2·g-1, the total pore volume is 0.146 cm3·g-1, microporosity is 17%. The effects of contact time, pH value and temperature on the adsorption of Cr(Ⅵ) in sludge carbon had been analyzed. In the condition of 90 min contact time, pH value of 3 and temperature of 50℃, the adsorption capacity of Cr(Ⅵ) is 9.93 mg·g-1 in sludge carbon. The adsorption kinetics fit the pseudo-second order kinetics model, and the adsorption process is described well with the Langmuir and Tempkin isotherm model.
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Preparation of sludge carbon with Fenton activation and adsorption characteristics of hexavalent chromium

  • Received Date: 19/12/2016
  • Accepted Date: 28/09/2016
  • Available Online: 26/08/2017
Fund Project:

Abstract: Using Fenton activation method to prepare activated carbon through dewatered sludge. The effects of Fenton's reagent dosage, activation time, carbonization temperature, residence time and heating rate on the preparation of sludge carbon were studied. The optimum preparation conditions are as the following:Fenton's reagent dosage is 150 mL, activation time is 2.5 h, carbonization temperature is 350℃, residence time is 1 h, heating rate is 20℃·min-1. The iodine adsorption value of sludge carbon under this optimum preparation condition is 331.90 mg·g-1, and BET specific surface area is 24.265 m2·g-1, the total pore volume is 0.146 cm3·g-1, microporosity is 17%. The effects of contact time, pH value and temperature on the adsorption of Cr(Ⅵ) in sludge carbon had been analyzed. In the condition of 90 min contact time, pH value of 3 and temperature of 50℃, the adsorption capacity of Cr(Ⅵ) is 9.93 mg·g-1 in sludge carbon. The adsorption kinetics fit the pseudo-second order kinetics model, and the adsorption process is described well with the Langmuir and Tempkin isotherm model.

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