The cost-effective recovery of phosphate is of great significance to the mitigation of phosphorus resource depletion crisis. The electrochemical-decomposition of dolomite was developed to recover phosphate and ammonium from aqueous solution. The dolomite ore is mainly composed of CaMg(CO₃)₂ (53.73%), CaCO₃ (28.93%) and SiO₂ (16.59%). The continuous release of Mg²⁺ and Ca²⁺ were achieved by electrochemically decomposing dolomite ore, accompanied by the generation of base solution (9.0 ∼ 10.5). The main factors affecting the recovery performance of phosphate (PO₄-P) and ammonium (NH₄-N) are current, initial concentration of PO₄-P and NH₄-N, initial pH of feed solution and feed rate. For a 30-d operation, the recovery rate of PO₄-P was maintained at 90 ∼ 97% and that of NH₄-N at 50 ∼ 60% under optimized operating conditions. The recovered product had low water solubility but high citric-acid-soluble, and was proposed as a slow-release fertilizer for crops. The proposed process as a simple, effective and green route may serve as a new strategy for recovering PO₄-P and NH₄-N from wastewaters.

具有成本效益的磷酸盐回收对缓解磷资源枯竭危机具有重要意义。开发了白云石的电化学分解以从水溶液中回收磷酸盐和铵。白云石矿石主要由CaMg（CO ₃）₂（53.73％），CaCO ₃（28.93％）和SiO ₂（16.59％）组成。Mg ²⁺和Ca ²⁺的连续释放是通过电化学分解白云石矿石实现的，并伴有碱溶液的生成（9.0〜10.5）。影响磷酸盐（PO ₄ -P）和铵（NH ₄ -N）回收性能的主要因素是电流，PO的初始浓度₄ -P和NH ₄ -N，进料溶液的初始pH和进料速率。对于30天的操作，在最佳操作条件下，PO ₄ -P的回收率保持在90〜97％，而NH ₄ -N的回收率保持在50〜60％。回收的产品水溶性低，但柠檬酸溶解度高，被提议作为农作物的缓释肥料。所提出的作为简单，有效和绿色途径的方法可以用作从废水中回收PO ₄ -P和NH ₄ -N的新策略。