Research progress of iron phosphate industrial wastewater treatment process
In recent years,lithium iron phosphate,a cathode material for lithium-ion batteries,has attracted wide attention,driving its precursor iron phosphate related research and production to show explosive growth.Howe ver,the mainstream pro-cess of iron phosphate production produce a lot of wastewater,restricting the green and healthy development of iron phos-phate industry.At present,the reported treatment methods of industrial wastewater of iron phosphate include precipitation method,magnesium ammonium sulfate crystallization,microbial decomposition,membrane separation,etc.But the sludge produced by precipitation method is difficult to treat and recover,magnesium ammonium phosphate method requires the ad-dition of additional agents to meet the precipitation conditions,the stability and flexibility of microbial method are poor,and the membrane separation method should be combined with other treatment techniques to pretreat the membrane inlet water and to treat the membrane concentrated water for reuse.Therefore,in industrial application,a variety of technologies are of-ten combined to form a comprehensive treatment method,which can achieve a better treatment effect on iron phosphate wastewater.Finally,the future wastewater treatment technology of iron phosphate industry was prospected from the aspects of efficient wastewater pretreatment and valuable elements recovery and reuse.
iron phosphatecathode material precursorindustrial wastewaterrecovery of valuable metalsphosphate fertil-izer
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