CAJ | 학술논문

利用碱改性粉煤灰吸附脱除水中诺氟沙星,采用平衡法测定了改性粉煤灰的平衡吸附量并用Freundlich模型进行了关联,计算了模型参数以及△G、△H和△S等热力学参数.结果表明,改性粉煤灰的比表面积为改性前的3.24倍;实验数据能较好地服从Freundlich模型;改性粉煤灰对水中诺氟沙星的吸附为自发、放热的熵减过程.
이용감개성분매회흡부탈제수중낙불사성,채용평형법측정료개성분매회적평형흡부량병용Freundlich모형진행료관련,계산료모형삼수이급△G、△H화△S등열역학삼수.결과표명,개성분매회적비표면적위개성전적3.24배;실험수거능교호지복종Freundlich모형;개성분매회대수중낙불사성적흡부위자발、방열적적감과정.
Batch adsorption experiments were carried out for the removal of norfloxacin from aqueous solution using coal fly ash modified by NaOH as adsorbent.The amount adsorbed was determined experimentally by the equilibrium method at 303,313 and 323 K,respectively.The experimental results showed that the BET surface area of modified coal fly ash was 3.24 times that of raw coal,ny ash.The Freundlich model was used to correlate the amount adsorbed and the residual concentration of norfloxacin at equilibrium,and the model parameters and the thermodynamic parameters such as △G,△H and △S were obtained.Equilibrium experimental data at 303,313 and 323 K can be fitted well by Freundlich model.It was indicted that adsorption of norfloxacin from aqueous solution onto modified coal fly ash was the spontaneous,exothermic and entropy decreasing process.