磷石膏的改性及生态修复应用实验研究

Experimental Study on the Modification and Ecological Restoration Application of Phosphogypsum

随着农业和磷化工产业的快速发展,磷石膏产量逐年增加。当前国内对于磷石膏并没有良好的处理方法,对高原环境及水资源造成了污染,从而研究磷石膏的改性及其在生态环境修复中的应用分析。氟元素为未处理磷石膏中危害最大且含量最高的元素,而磷元素则是有利于植物生长的元素,本实验选取不同方法改性磷石膏,对比其改性前后磷元素和氟元素含量,探寻最适宜大量处理磷石膏的改性方法和磷石膏在生态修复中对高羊茅生长情况的影响。通过结合水洗法和生石灰中和法,简单有效的除氟留磷,经此改性的磷石膏可以用于种植高羊茅等适应力较强的草本植物,从而改善高原的生态环境。

With the rapid development of agriculture and phosphorus chemical industry,the production of phosphogypsum has been increasing year by year.Currently,there is a lack of effective methods for treating phosphogypsum in China,resulting in pollution to both highaltitude environments and water resources.Therefore,this study investigates the modification of phosphogypsum and its potential application in ecological restoration.Fluorine is the most harmful and abundant element in untreated phosphogypsum,while phosphorus is an element that is beneficial for plant growth.In this experiment,various modification methods are employed to alter phosphogypsum,and the changes in phosphorus and fluorine content before and after modification are compared to identify the most suitable approach for large-scale phosphogypsum treatment.Additionally,the study assesses the impact of modified phosphogypsum on the growth of tall fescue in the context of ecological restoration,and an efficient approach is developed to remove fluoride while retaining phosphorus in modified phosphogypsum.This modified phosphogypsum can be utilized for planting robust herbaceous species such as tall fescue,ultimately enhancing the ecological environment of high-altitude regions.