Method for immobilizing heavy metals by using phosphoric acid-based geopolymer

The invention relates to the field of hazardous waste treatment, in particular to a method for immobilizing heavy metal by using a phosphoric acid-based geopolymer. The invention provides a method for immobilizing heavy metals by using a phosphoric acid-based geopolymer, which comprises the following steps of: generating the phosphoric acid-based geopolymer by using a phosphoric acid solution and a silicon-aluminum material as reactants, and immobilizing heavy metal elements in the solution by using the phosphoric acid-based geopolymer. According to the technical scheme, while the heavy metal is effectively fixed, the prepared geopolymer has certain mechanical properties, can be used as a low-cost green building material or used for solid waste landfill and the like, and has additional economic benefits. 本发明涉及危废处理领域，具体涉及一种利用磷酸基地质聚合物固定重金属的方法。本发明提供一种利用磷酸基地质聚合物固定重金属的方法，即以磷酸溶液与硅铝质材料为反应物，生成磷酸基地质聚合物，采用所述磷酸基地质聚合物固定溶液中的重金属元素。本发明的技术方案实现有效固定重金属的同时，制备的地质聚合物具备一定的力学性能，能够作为低成本的绿色建筑材料或用于固体废弃物填埋等，具有额外的经济效益。