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ZENG Fan, LI Yong, CHEN Shunqiang, ZHAO Xian, HU Hui, LIAO Li. Preparation of activated clay-stalk based activated carbon and its adsorption of COD in landfill leachate[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5188-5194. doi: 10.12030/j.cjee.201609125
Citation: ZENG Fan, LI Yong, CHEN Shunqiang, ZHAO Xian, HU Hui, LIAO Li. Preparation of activated clay-stalk based activated carbon and its adsorption of COD in landfill leachate[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5188-5194. doi: 10.12030/j.cjee.201609125
shu

Preparation of activated clay-stalk based activated carbon and its adsorption of COD in landfill leachate

  • 1.

    College of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

  • 2.

    Department of Urban Construction Engineering, Wenhua College, Wuhan 430074, China

  • Received Date: 21/11/2016
    Accepted Date: 13/09/2016
    Available Online: 26/08/2017
    Fund Project:
  • Activated clay and corn stalk were used to prepare clay-stalk based activated carbon by high-temperature pyrolysis, and the activator was KOH. The physical and chemical properties and absorption characteristics of COD in landfill leachate were studied. The effects of activated carbon dosage, adsorption time and solution pH on COD removal were discussed and the adsorption isotherms were fitted. The results showed that an appropriate amount of activator could improve the iodine value and BET surface area of activated carbon, which could be 342.9 mg·g-1 and 420.34 m2·g-1 as the solid to alkali ratio was 0.4.The surface of the best carbon was irregular and porous, and porous structure was mainly mesoporous. The COD removal rate was 84%. The adsorption experimental data were fitted by both Langmuir and Freundlich isotherm models
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Preparation of activated clay-stalk based activated carbon and its adsorption of COD in landfill leachate

  • Received Date: 21/11/2016
  • Accepted Date: 13/09/2016
  • Available Online: 26/08/2017
Fund Project:

Abstract: Activated clay and corn stalk were used to prepare clay-stalk based activated carbon by high-temperature pyrolysis, and the activator was KOH. The physical and chemical properties and absorption characteristics of COD in landfill leachate were studied. The effects of activated carbon dosage, adsorption time and solution pH on COD removal were discussed and the adsorption isotherms were fitted. The results showed that an appropriate amount of activator could improve the iodine value and BET surface area of activated carbon, which could be 342.9 mg·g-1 and 420.34 m2·g-1 as the solid to alkali ratio was 0.4.The surface of the best carbon was irregular and porous, and porous structure was mainly mesoporous. The COD removal rate was 84%. The adsorption experimental data were fitted by both Langmuir and Freundlich isotherm models

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