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Li Yumei, Chen Lirong, Du Mingzhan. Preparation of coagulant from fly ash and its application in Yellow River water treatment[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1346-1350.
Citation: Li Yumei, Chen Lirong, Du Mingzhan. Preparation of coagulant from fly ash and its application in Yellow River water treatment[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1346-1350.
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Preparation of coagulant from fly ash and its application in Yellow River water treatment

  • 1.

    School of Energy and Environment, Inner Mongolia University Science and Technology, Baotou 014010, China

  • Received Date: 05/06/2012
    Accepted Date: 21/02/2012
    Available Online: 09/04/2013
    Fund Project:
  • Coagulant was prepared with fly ash and iron mud, adding a certain amount of NaCl as cosolvent at room temperature. Effect of ratio of HCl to fly ash and HCl concentration on Fe3+ and Al3+ dissolution rate and coagulation performance on Yellow River water were investigated. The result showed that the optimal dissolution conditions of Fe3+ and Al3+ were HCl to fly ash ratio of 3 mL/g and HCl concentration of 4 mol/L. At the same time, Fe3+ concentration was 11.81 g/L with dissolution rate of 28.1%. Al3+ concentration was 1.86 g/L with dissolution rate of 5.2%. Furthermore, the optimal coagulation effect to Yellow River water was attained at dosage of 2.38 mL/L, sedimentation time of 30 min, pH 6.2~7.5, and the removal efficiency of turbidity, SS and CODMn could reach about 89.7%, 83.6% and 62.3%, respectively, so the water treatment effect of coagulant here is better than that of PAC and FC from market. AS co-exist of Fe3+ and Al3+ can better play their respective advantages, the coagulation effect can be enhanced.
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Preparation of coagulant from fly ash and its application in Yellow River water treatment

  • Received Date: 05/06/2012
  • Accepted Date: 21/02/2012
  • Available Online: 09/04/2013
Fund Project:

Abstract: Coagulant was prepared with fly ash and iron mud, adding a certain amount of NaCl as cosolvent at room temperature. Effect of ratio of HCl to fly ash and HCl concentration on Fe3+ and Al3+ dissolution rate and coagulation performance on Yellow River water were investigated. The result showed that the optimal dissolution conditions of Fe3+ and Al3+ were HCl to fly ash ratio of 3 mL/g and HCl concentration of 4 mol/L. At the same time, Fe3+ concentration was 11.81 g/L with dissolution rate of 28.1%. Al3+ concentration was 1.86 g/L with dissolution rate of 5.2%. Furthermore, the optimal coagulation effect to Yellow River water was attained at dosage of 2.38 mL/L, sedimentation time of 30 min, pH 6.2~7.5, and the removal efficiency of turbidity, SS and CODMn could reach about 89.7%, 83.6% and 62.3%, respectively, so the water treatment effect of coagulant here is better than that of PAC and FC from market. AS co-exist of Fe3+ and Al3+ can better play their respective advantages, the coagulation effect can be enhanced.

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