生物负载微孔渗水型混凝土对土壤中残留毒死蜱的去除试验
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X53

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国家水体污染控制与治理科技重大专项(2017ZX07204003);国家自然科学基金(51421006)


Removal experiment of residual chlorpyrifos in soil by bio-loaded microporous permeable concrete
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    摘要:

    为了解决农村农药面源污染问题,利用小流量渗透法将毒死蜱降解菌负载在微孔渗水型混凝土上,研究不同降雨强度下不同孔隙率混凝土对毒死蜱的降解截留效果。结果表明:对于3种不同透水系数的微孔混凝土,微孔渗水型混凝土负载生物量和生物活性随孔隙率增大呈先升高后降低趋势;对于两种不同的降雨强度,毒死蜱降解率最优的都是孔隙率为48.1%的试样;降雨强度较大时,土壤中毒死蜱析出质量浓度较高,且降雨强度越大析出速度越快,试样对析出的毒死蜱降解效果越差。微孔渗水型混凝土对土壤中残留毒死蜱具有较好的去除效果,材料本身具有高强度、高寿命、低成本等特点,在土壤护坡、河流护岸等方面具有较好的应用前景。

    Abstract:

    In order to solve the problem of pesticide non-point source pollution in rural areas, the microporous concrete was loaded with chlorpyrifos degrading bacteria by small flow infiltration method to study the degradation and retention effect of chlorpyrifos by concrete with different porosity under different rainfall intensity. The results show that, for 3 kinds of microporous concrete with different permeability coefficient, the loading biomass and biological activity first increased and then decreased with the increase of the microporous concrete porosity. For two different rainfall intensities, the porosity of the sample with the best degradation rate of chlorpyrifos is 48. 1%. When the rainfall intensity is larger, the concentration of Chlorpyrifos in soil is higher, the precipitation speed is faster with the rainfall intensity, and the degradation effect of chlorpyrifos is worse. The microporous concrete has a good removal effect on the residual chlorpyrifos in the soil. The material itself has the characteristics of high strength, long service life and low cost, which has good application prospects in soil slope protection and river bank protection.

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潘翔,饶磊,王沛芳,等.生物负载微孔渗水型混凝土对土壤中残留毒死蜱的去除试验[J].水资源保护,2021,37(3):115-120.(PAN Xiang, RAO Lei, WANG Peifang, et al. Removal experiment of residual chlorpyrifos in soil by bio-loaded microporous permeable concrete[J]. Water Resources Protection,2021,37(3):115-120.(in Chinese))

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  • 收稿日期:2020-10-13
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  • 在线发布日期: 2021-05-14
  • 出版日期: 2021-05-20