Single-Step Efficient Purification of Phosphogypsum via Wet Grinding and Microenvironmental Treatment

The presence of impurities in phosphogypsum has long impeded its effective utilization, highlighting the need for energy-efficient and sustainable purification methods. This study proposes a novel purification strategy that synergistically combines pH regulation and micelle-assisted treatment to create an optimized microenvironment for impurity removal. Under mechanical grinding conditions, this approach enhances the rheological properties of the phosphogypsum slurries and facilitates the dissolution and removal of impurity ions. Experimental results demonstrate that the synergistic method achieves a remarkable 64.01% increase in whiteness while significantly reducing soluble phosphorus and fluoride content in a single-step process. This technique not only achieves high purification efficiency but also offers a practical pathway for the high-value utilization of phosphogypsum. These findings suggest that this method has substantial potential for enhancing sustainable resource management and enabling broader industrial applications of purified phosphogypsum.