载铁活性炭对饮用水中卤乙酸的吸附研究

Research on the Absorption of Haloacetic Acids(HAAs) in Drinking Water by Ferric Supported Active Carbon

[目的]研究载铁活性炭去除卤乙酸的特性。[方法]通过浸渍-焙烧法制备载铁活性炭,研究载铁活性炭(Fe-AC)对三氯乙酸溶液的吸附速率及吸附等温线。[结果]载铁活性炭对三氯乙酸(TCAA)的初期吸附速率较活性炭可提高10%;在单底质条件下,载铁活性炭及活性炭对卤乙酸的吸附等温线均符合Freundlich方程,且K载铁>K活性炭,表明载铁活性炭与活性炭相比提高了三氯乙酸的吸附性能。[结论]修正后的Freundlich方程可以更好地拟合三氯乙酸的吸附过程。

[Objective] The research aimed to study the characteristics of the removing of haloacetic acid （HAAs） by iron-containing activated carbon.[Method] The Ferric supported active carbon was prepared by the dipping-roasting method.The adsorption rate and adsorption isotherms of trichloroacetic acid （TCCA） was carried out.[Result] The initial adsorption rate of ferric supported active carbon could be enhanced by 10％ comparing with the unmodified activated carbon.In single substrate conditions,the adsorption progress of ferric supported active carbon and activated carbon on the TCCA were also accorded with the Freundlich isotherm equation,and Kiron ＞ Kunmodified,which indicated that the ferric supported active carbon improved the adsorption performance of TCCA.[Conclusion] The modified Freundlich equation could better fit the adsorption progress of TCCA.