In order to study the effect of pH value on migration and conversion to organophosphor in permeable clay, permeation and pressure equipment were adopted to simulate the migration and conversion process of organophosphor permeating the aquitard in the polluted aquifer. It indicates that the migratory capacity of organophosphor in aquitard is weak, while the mineralization rate of organophosphor is between 93.5％ and 99. 95％ with different pH conditions. During pH value as 5.5 to 8. 5, the activity of acid phosphatase going up with pH value increases, while the ability of degradation and conversion becomes stronger, and the retardation for organophosphor in clay enhances along with pH value. When pH value is 5.5, the migration rate is 6. 5％. As the pH value reaches to 8. 5, the mineralization rate increases obviously with the migration rate less than 0. 05％, which hard for organophosphor permeate into the deep phreatic water and bring pollution.%为研究渗透水PH值对有机磷通过弱透水黏土层迁移转化的影响规律,采用黏性土层充压渗透装置模拟污染潜水中有机磷渗透通过弱透水层的迁移转化过程.研究发现,有机磷组分通过弱透水层的迁移能力总体较弱,不同PH值条件下有机磷的矿化率为93.5%～99.95%;在进水PH值为5.5～8.5时,进水PH值越高,土层中磷酸酶的活性也越高,降解转化有机磷的能力也越强;黏土对有机磷的阻滞能力也增强.进水PH值为5.5时,迁移率为6.5%;当PH达到8.5时,矿化率明显增加,迁移率＜0.05%,使其不易渗入深层地下水引起污染.
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