摘要
The adsorption capability of loam soil for nano-TiO2 affected by the amount and intensity of leached water has been investigated by simulating the natural rainfall process under the leaching condition.The results show that the amount and the intensity of leached water are two important factors affecting the adsorption capability of loam soil for nano-TiO2.The results indicate that the depth of the loam soil containing a maximal amount of nano-TiO2 is proportional to the amount of leached water,while it is inversely proportional to the intensity of leached water,at a constant amount of the leached water.It was also found that the adsorption capability of soils for nano-TiO2 can be improved by adding other materials,such as dissolved organic matter（DOM）,bentonite and straw.It was found that DOM is the best sorbent for improving the adsorption capability of loam soil for nano-TiO2,followed by bentonite,while straw is not suitable for the modification of loam soil.The improvement of adsorption capability of loam soil depends on the amount of these additives.Nano-TiO2 can be effectively adsorbed on the surface layer of loam soil containing an appropriate amount of additive.
The adsorption capability of loam soil for nano-TiO2 affected by the amount and intensity of leached water has been investigated by simulating the natural rainfall process under the leaching condition.The results show that the amount and the intensity of leached water are two important factors affecting the adsorption capability of loam soil for nano-TiO2.The results indicate that the depth of the loam soil containing a maximal amount of nano-TiO2 is proportional to the amount of leached water,while it is inversely proportional to the intensity of leached water,at a constant amount of the leached water.It was also found that the adsorption capability of soils for nano-TiO2 can be improved by adding other materials,such as dissolved organic matter（DOM）,bentonite and straw.It was found that DOM is the best sorbent for improving the adsorption capability of loam soil for nano-TiO2,followed by bentonite,while straw is not suitable for the modification of loam soil.The improvement of adsorption capability of loam soil depends on the amount of these additives.Nano-TiO2 can be effectively adsorbed on the surface layer of loam soil containing an appropriate amount of additive.
基金
Supported by the National Natural Science Foundation of China(No.50678095)
