Dynamic and static adsorption of phosphate in water on the zirconium oxychloride modified zeolite

摘要

In this paper, the dynamic and static adsorption performance of phosphate in the water on the zirconium modified zeolite (Cl2OZr/zeolite) was investigated. Batch adsorption experiments were performed to evaluate the adsorption conditions and selectivity. The experimental results agree well with the pseudo second-order kinetic model. The effects of the dynamic adsorption of phosphate on Cl2OZr/zeolite were studied. The results indicate that the breakthrough time is 480 min and the phosphate removal rate reaches 95% under the optimal conditions. The curves of dynamic adsorption could be fitted by the Thomas model. Cl2OZr/zeolite can be reused and applied to the actual waste water treatment. Comparing previous studies on phosphate removal with different adsorbents, we can see that the Cl2OZr/zeolite has the advantages of wide pH range, relatively short adsorption equilibrium time and reusability.