A review of solid waste soil treatment and improvement regulation methods through the combined action of red mud,phosphogypsum,and desulfurization gypsum
The large amount of solid waste stored,such as red mud,phosphogypsum and desulphurized gypsum,which would occupies land area,wastes resources and pollutes the environment,even harms human health.Through transposing consideration,three of them still have the functions of fixing heavy metals,increasing the soil aggregate structure,and strong adsorption of organic matter and so on,respectively.The above problems can be effectively solved by mixing and nurturing multiple types of solid waste,carrying out soil improvement and treatment.It also can turn"waste"into"treasure"by utilizing them.According to the different purposes,this summary concluded four regulatory methods:the regulating of alkaline,physical structure,nutrient balance and pollutant by having consulted,organized literature,and combined with my own experimental data.In alkaline regulation,the alkalinity of solid waste soil can be reduced by adding gypsum to red mud,biological dealkalization,and other methods.In the regulation of physical structure,the stability of soil aggregates can be enhanced through methods such as covering the surface of solid waste with soil,adding amendments,and biological regulation.Fertilizer can provide the nutrients needed for crops above the soil in a short period of time.The interaction between salt alkali tolerant plants,microorganisms,and amendments such as red mud and gypsum in red mud based solid waste soil can effectively improve soil infertility and nutrient deficiency in the long term.For pollutant control,super accumulating plants can effectively remove heavy metals from soil,and microorganisms can utilize their specific metabolic processes to accelerate the decomposition and removal of pollutants.The above regulatory methods can provide theoretical support for targeted soil remediation and improvement of solid waste.
万方数据
维普
