Increasing Soluble Phosphate Species by Treatment of Phosphate Rocks with Acidic Waste.

摘要: The development of efficient fertilizers with a diminished environmental footprint will help meet the increasing demand for food and nutrients by growing global population. Our objective was to evaluate whether an acidic mine waste (AMW) could be used beneficially reacting it sparingly soluble phosphate rocks (PRs) produce more P fertilizer materials. Three PRs from Brazil Peru were reacted different concentrations AMW. Changes in mineralogy species determined using combination X-ray diffraction phosphorus K-edge XANES spectroscopy, addition extractable concentrations. Increasing AMW concentration typically increased P. data showed transformation apatite other when at ≥50% (v/v) water, gypsum or anhydrite forming as low 12.5%. Linear fitting analysis absorption near edge structure spectra also indicated progressive noncrystalline Fe(III)-phosphate Ca-phosphates concentration. Because this is costly dispose of, PR higher-grade material decrease impacts diminish consumption pure acids conventional production.