Migration and transformation of Cr~(6+) in soil environment

摘要

Through the adsorption and permeation experiments, the authors explored the adsorption characteristics and permeability characteristics of the Cr~(6+) in different soils (sandy loam, clay loam and clay). Introduced an adoption to the soil flaps to concuss a machine, the shot solid type permeates instrument and the high velocity centrifuge to separate the pure liquid for the experiment material and method of measuring the density. The experimental results show that the adsorptions of Cr~(6+) are in line with Langmuir equation. The three kinds of soils saturated absorptions are 181, 203 and 242 mg/kg. We also found that would change the soil texture and increase soil permeability coefficient when it was infiltrated in soil. The results provide the basis for the governance of the chromium contaminated sites repairing and preventing the spread of contamination.