活性炭纤维对水中铁的吸附研究

以活性炭纤维(ACF)为溶液中铁离子的吸附剂,考察了吸附时间、吸附温度、ACF比表面积及表面酸碱性对Fe3 吸附行为的影响.通过平衡吸附实验获得的吸附等温线,并不符合Langmuir与Freundlich经验吸附方程.吸附温度升高与ACF比表面积增加,都有利于铁离子的吸附,说明吸附过程同时具备物理和化学吸附行为的双重特征.ACF表面碱性基团是影响铁离子吸附的主要因素.

Adsorption of Iron (Ⅲ) from Water by Activated Carbon Fibers

Activated carbon fiber(ACF) was used as adsorbent for removing the iron(III) ion from water in this study.The effect of adsorption time,adsorption temperature,specific surface area and the acidic and basic surface functional groups of ACF on the adsorption of iron(III) ion behavior was investigated.The obtained adsorption isotherm wasn't according with the Langmuir and Freundlich equations.The increase in adsorption temperature and specific surface area could improve the adsorption of Fe~(3+) by ACF.This suggested that the adsorption process was involved chemical and physical adsorption.Furthermore,it was found that the basic surface of ACF was the major factor affecting the adsorption for Fe~(3+).