Coal Fly Ash as a Soil Amendment for Phosphorus Adsorption in Red Clay Soils of the Loess Plateau
[Purposes]This work has been done to deal with soil phosphorus pollution in the Loess Plateau area and similar environmentally sensitive regions and develop a technique for reusing coal fly ash.[Methods]Batch studies with coal fly ash as a soil amendment were conducted to sys-tematically investigate the impact of dosage,pH,initial phosphorus concentration,time,and tempera-ture on phosphorus adsorption in red clay soils with amendment of coal fly ash.[Findings]Isother-mal,kinetic,and thermodynamic analyses indicated that the addition of coal fly ash significantly en-hanced the maximum adsorption capacity of red clay soils for phosphorus,accelerated the adsorption reaction rate,altered the phosphorus adsorption kinetics,and enhanced the spontaneity of the adsorp-tion process.This study provides new insights into addressing phosphorus pollution in red clay soils in the Loess Plateau area and the sustainable disposal of coal fly ash.
adsorption modelsadsorption performanceclay mineralsloess soilsWeber and Morris model
万方数据
维普
