The Adsorption Capacity and Influencing Factors of Cr3+ by the Modified Zeolite from Fly Ash

In this study, the modified zeolite from fly ash was prepared and used as an adsorbent for removal of Cr³⁺ ion from aqueous solution. The characteristic of the modified zeolite was analysed. The adsorption capacity and influencing factors, such as contact time, pH in solution, the modified zeolite dosage, initial concentration of Cr³⁺ and temperature, were discussed in detail by the adsorption experiments. The experimental results showed that the modified zeolite from fly ash, own high adsorption capacity for Cr³⁺ ion in aqueous solution. The influencing factors had an important influence on the adsorption capacity. The removal efficiency of Cr³⁺ ion increased with the increase of the modified zeolite dosage. However, the removal efficiency of Cr³⁺ ion decreased with the increase of the initial concentration of Cr³⁺ ion in aqueous solution. The experimental results showed that the modified zeolite from fly ash has a strong potential ability for removal of Cr³⁺ ion in aqueous solution.