科研之友
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摘要
To explore the possibility of treating polluted water containing both organics and heavy metals, the synthesis of polystyrene-divinylbenzene AJS-02 modified by L-tyrosine acid and a comparison of adsorption-desorption performance toward phenol on NDA-150 and AJS-02 had been investigated. Tt was shown that the equilibrium adsorption data fitted to Langmuir isotherms, and the adsorption capacity decreased with increase of temperature suggesting the exothermic process. The equllibrium adsorption capacity of AJS-02 and NDA-150 toward phenol was 76.98 mg/g and 91.97 mg/g, respectively when the initial concentration was 100 mg/L and the adsorption temperature was 288 K. These results might be attributed to both the specific surface areas and the polar groups on the network of resins. Thermodynamic studies suggested that the adsorption of phenol on AJS-02 was a procedure of coexistence of physisorption and chemisorption. The kinetic data fitted to both the intraparticle diffusion equation and the film diffusion equation for NDA-150 and AJS-02. It was shown that the adsorption rate was mainly governed by film diffusion. It was showed in dynamic adsorption and desorption experiments for phenol on AJS-02 the breakthrough adsorption capacity and the total adsorption capacity were 5.26 x 10(-2) mmol and 6.60 x 10(-2) mmol per milliliter resin, respectively. 91.5% regeneration efficiency for AJS-02 was achieved by 95% ethanol in our study
- 出版日期2009-12-20
- 单位安徽工业大学
