铈盐法脱除氧化锌烟尘净化液中的F-

摘要

Removal of fluorinion from zinc sulfate solution of zinc oxide dust using Ce (SO4 )2 · 4H2 O and Ce2 (CO3 )3 respectively was investigated .The technique of XRD was used .The experimental results indicate that Ce(SO4 )2 · 4H2 O has no role on removal of F -from zinc sulfate solution .F-in the solution can form CeCO3 F by adding Ce2 (CO3 )3 and Na2 S2 O3 .T he content of fluoride in the solution is reduced from 0 .638 g/L to 0 .115 g/L .However ,the process has high cost and much more usage of Ce2 (CO3 )3 .%针对氧化锌烟尘净化液中氟含量高的问题，分别以Ce（SO4）2·4H2 O和Ce2（CO3）3为除氟剂，以 H2 O2和Na2 S2 O3为辅助剂，借助X射线衍射（XRD）法，探讨了铈盐沉淀法从氧化锌净化液中除氟的机制。结果表明：Ce（SO4）2·4H2 O难以与净化液中的F-生成沉淀物；在添加Na2 S2 O3后，Ce2（CO3）3与浸出液中的F-生成CeCO3 F沉淀物，可以实现除氟目的，溶液中氟质量浓度可以从0．638 g/L降至0．115 g/L ，但Ce2（CO3）3用量大，成本较高。