活性炭表面物理化学性质对溴酸盐吸附的影响

The effect of the physical and chemical character of activated carbon surface on the bromate adsorption

摘要:

为了探求活性炭去除水中溴酸盐离子的吸附机理,研究活性炭表面物理化学性质对饮用水中溴酸盐去除的影响.选取唐山炭、新华炭和默克炭3种活性炭作为实验用炭,重点考察3种活性炭表面孔径大小、官能团分布的异同对溴酸盐吸附的影响,测定了3种活性炭吸附溴酸盐的吸附等温线.结果表明:含有中孔数量最多的默克炭对溴酸盐的吸附能力最强.此外,由于默克炭表面含有的内酯基官能团最多,也对溴酸盐的吸附能力起到了积极作用.默克炭的对溴酸盐的吸附能力最强,而新华炭的吸附能力最弱,唐山炭介于二者之间.

Abstract:

In order to exploit the adsorption principle of bromate adsorbed onto the activated carbon,the effect of physical and chemical characters of the activated carbon surface on the bromate adsorption was studied.Tangshan activated carbon,Merck activated carbon and Xinhua activated carbon were compared in the experiment.Effects of the pore size and volume as well as the functional group distribution on the bromate adsorption were researched.The results show that Merck activated carbon which has the largest amount of mesopores has the best adsorption capability.Moreover,the surface of Merck activated carbon has the largest amount of lactones,which plays a positive role in the bromate removal.At last,the adsorption isotherms of the three activa-ted carbons were measured.It is found that the adsorption of Merck activated carbon is the highest,that of Xinhua activated carbon is the lowest and that of Tangshan activated carbon is in the middle.