活性炭纤维对水中镉离子的吸附研究

以活性炭纤维作为去除水中镉离子的吸附剂。考察了振荡时间、活性炭纤维用量、水样pH对吸附效果的影响。并通过等温吸附平衡实验作出了吸附等温线 ,采用有关的等温吸附模式对吸附平衡实验数据作了线性模拟 ,对吸附规律进行了探讨。结果表明 ,振荡时间、活性炭纤维用量、pH是影响镉离子在活性炭纤维上吸附效果的主要因素 ,吸附效率随着振荡时间的延长、活性炭纤维用量的增加、pH的增大而增大。吸附容量随活性炭纤维用量的增加而减小。镉离子在活性炭纤维上的吸附规律可用Langmuir模式和Freundlich模式很好地描述。吸附形式呈单分子层且容易进行。结果表明 ,活性炭纤维对水中镉离子的吸附特性良好 ,可作为去除水中离子态镉的优良吸附剂。

Study on Absorption of Cadmium Cation in Water by Activated Carbon Fabric

Activated Carbon Fabric (ACF) was used as absorbent of cadmium in water in this paper. The effect of shaking time, ACF amount, and pH on the absorption efficiency was investigated. The absorption isotherm was represented too. The results show that shaking time, ACF amount and pH are the main factors to affect absorption efficiency. The absorption efficiency increases with increase of shaking time, ACF amount and pH. The absorptive capacity decreases with increase of ACF amount. The absorption of cadmium onto ACF can be well described by Langmuir and Freundlich models. The absorption is in monomolecular type and it is easy to be performed. The results aslo indicate that the performance of the absorption of cadmium cation onto ACF is good. ACF can be used as fine adsorbent to remove cadmium from water.