粉煤灰的改性及对刚果红的吸附

分别采用沸水浸泡、酸浸、碱浸和加热的方法对粉煤灰进行改性处理，利用FTIR仪和XRD仪对改性粉煤灰的成分和官能团进行了分析，并利用改性粉煤灰对模拟刚果红废水进行脱色。实验结果表明：碱改性粉煤灰中含有大量官能团，以及NaPl型沸石类物质，能够明显提高粉煤灰对刚果红的吸附性能；与活性炭相比，碱改性粉煤灰具有更高的性价比；在初始刚果红质量浓度为20mg/L、碱改性粉煤灰加入量为50g/L的条件下，废水的脱色率可达87.52%；碱改性粉煤灰对刚果红的吸附过程遵循二级反应动力学，较好地符合Langmuir等温式和Freundlich等温式。

Modification of Fly Ash and Adsorption to Congo Red

Fly ash was modified separately by boiling water soaking,acid leaching,alkali leaching and heating,and characterized by FTIR and XRD. The simulated Congo red wastewater was decolorized using the modified fly ash. The experimental results show that：The alkali-modified fly ash contains a large number of functional groups and NaP1-type zeolite,which can significantly increase the adsorption capability of fly ash to Congo red；Comparing with activated carbon,the performance-price ratio of the alkali-modified fly ash is higher；When the initial Congo red mass concentration is 20 mg/L and the alkali-modified fly ash dosage is 50 g/L,the decoloration rate of the wastewater can reach 87.52%；The adsorption process of Congo red on the alkali-modified fly ash follows the second order reaction kinetics and accords with Langmuir and Freundlich isotherm equations.