2017 Volume 11 Issue 9
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JIANG Yaodong, HUANG Juan, ZHANG Lei, ZHANG Xue. New dust-depressor using urease induced calcite precipitation[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5097-5103. doi: 10.12030/j.cjee.201701105
Citation: JIANG Yaodong, HUANG Juan, ZHANG Lei, ZHANG Xue. New dust-depressor using urease induced calcite precipitation[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5097-5103. doi: 10.12030/j.cjee.201701105
shu

New dust-depressor using urease induced calcite precipitation

  • 1.

    School of Civil Engineering, Southeast University, Nanjing 210096, China

  • Received Date: 19/04/2017
    Accepted Date: 16/01/2017
    Available Online: 26/08/2017
    Fund Project:
  • To develop a new type of dust-depressor which has the characteristics of longer residual action, secondary dust reduction, high temperature resistance and environmental protection. Best proportions (30 g·L-1 of urease, 0.8 mol·L-1 of urea, 0.8 mol·L-1 of calcium chloride and 1 g·L-1 super absorbent polymer) of urease dust-depressor have been determined by utilizing a method of urease inducing calcite precipitation. In addition, pure water, CaCl2 and super absorbent polymer are chosen to compare with urease dust-depressor on the performance. The results showed that the urease dust-depressor possesses 0.04 g·(m2·s)-1 of evaporation rate, 23.7% of driage, 27.8 of wind resistance index, 70.7% of dust suppression efficiency, which are superior to the other 3 dust-depressors on the performance of evaporation and wind resistance, water retentivity, and dust suppression efficiency.
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New dust-depressor using urease induced calcite precipitation

  • Received Date: 19/04/2017
  • Accepted Date: 16/01/2017
  • Available Online: 26/08/2017
Fund Project:

Abstract: To develop a new type of dust-depressor which has the characteristics of longer residual action, secondary dust reduction, high temperature resistance and environmental protection. Best proportions (30 g·L-1 of urease, 0.8 mol·L-1 of urea, 0.8 mol·L-1 of calcium chloride and 1 g·L-1 super absorbent polymer) of urease dust-depressor have been determined by utilizing a method of urease inducing calcite precipitation. In addition, pure water, CaCl2 and super absorbent polymer are chosen to compare with urease dust-depressor on the performance. The results showed that the urease dust-depressor possesses 0.04 g·(m2·s)-1 of evaporation rate, 23.7% of driage, 27.8 of wind resistance index, 70.7% of dust suppression efficiency, which are superior to the other 3 dust-depressors on the performance of evaporation and wind resistance, water retentivity, and dust suppression efficiency.

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