Abstract:

In order to reduce the pollution caused by chlorine deicing salt on the ecological environment, and save the costs of soil remediation and repair, prevention and control of soil was carried out with a kind of adsorbed layer of deicing salt adsorption, which was made up of adsorption materials, such as sepiolite cashmere, zeolite and humus, aiming at the Tian’anmen Square in Pinus tabulaeformis planting soil secondary salinity problems of deicing salt. The laying of adsorption layer and soil were sampled and analyzed. The results showed that, the adsorption layer would absorb Na+, Cl- from the deicing salt effectively, which also had an obviously buffer action on pH, EC value of soil. However, a maximum adsorption capacity might exist when Cl- was absorbed. The follow-up soil monitoring showed that, pedestrians and traffic on Tiananmen Square and other factors had certain effect on soil EC value. The adsorption layer would absorb the inorganic salt ion composition in the chlorine deicing salt, and it would effectively prevent the secondary salt damage caused by the chlorine deicing salt on Pinus tabulaeformis planting soil, to change the pollution situation within a certain range.