Study on the Recycling of P in Phosphogypsum Leachate

After washing and curing, P is transported from the phosphogypsum to leachate during detoxification process, providing two ideas for phosphorus recovery leachate: 1) preparation of calcium hydrogen phosphate feed; 2) phosphate. A ready-to-use oxide slurry was used recover at a concentration 20% quantitative link between ratio fixation rate fitted by mixed use batch experiments, reaction kinetics thermodynamics, theoretical calculations were demonstrate that cannot be completely reused in The findings demonstrated that: a) residual range 1300 - 1500 mg/L type I feed grade leachate; b) removal effect could reach 99.99% using equation: = 87.91 10.96(Ca/P) + 3.22(Ca/P)2 (R2 0.9954); c) procedure follows suggested secondary kinetics, according Freundlich isothermal model, process under control chemical reaction, with index 0.7605. This study can as guide leachate, products bring about economic by-products, purification wastewater reuse.