高钙固硫粉煤灰制备分子筛及对Cu^(2+)的吸附  

Preparation of Zeolite From High Calcium and Solid Sulfate Fly Ash and Its Adsorption of Cu^(2+)

作　　者：陈龙 曹旺均 宋明光 王群英 

机构地区：[1]福建华电可门发电有限公司,福建福州350512 [2]中国华电集团福建分公司,福建福州350003 [3]华电电力科学研究院,浙江杭州310030

出　　处：《发电与空调》2016年第5期15-19,共5页

摘　　要：以高钙固硫粉煤灰为原料,采用碱熔-水热晶化法制备了一种未命名分子筛产品,考察了不同碱灰比对合成产物的影响,并采用了XRD、SEM、SEM-EDX等手段对产物进行了表征分析,实验结果表明1.5为较为合适的碱灰比。在室温条件下、Cu^(2+)离子浓度为200mg·L^(-1)、分子筛样品用量比为0.005g·ml^(-1)时,制备得到的分子筛产品CAZ-1.5对溶液中Cu^(2+)离子的吸附过程符合Lagergren二级速率方程,相应的二级吸附速率常数为62.50g/(mg·min)。在室温条件下、分子筛样品用量比为0.005g·ml^(-1)时,制备得到的分子筛产品对不同浓度Cu^(2+)的等温吸附曲线均符合Langmuir方程,理论饱和吸附容量(Q_m)可达107.5 mg·g^(-1)。An unnamed zeolite product was successfully prepared by an alkali-fusion hydrothermal-crystallization method from high calcium and solid sulfate fly ash. The effect of NaOH/fly ash mass ratio on the product was studied,and the products were analyzed by means of XRD, SEM and SEM-EDX. The results show that NaOH/fly ash mass ratio of 1.5 is more appropriate. Adsorption process of Cu2＋ from aqueous solution by the prepared product CAZ-1.5 attributes to Lagergren second-order kinetics model under the condition of room temperature, initial Cu2＋ mass concentration 200 mg·L-1 and the ratio of zeolite to solution 0.005g·ml-1. The corresponding adsorption constant is 62.50g/ （mg·min）. The equilibrium isotherm for Cu2＋ uptake corresponds closely to the Langmuir model under the condition of room temperature and the ratio of zeolite to solution 0.005g·ml-1. The maximum adsorption capacity of CAZ-1.5 is up to 107.5mg·g-1.

关 键 词：高钙固硫粉煤灰 碱熔-水热晶化法 未命名分子筛 Cu2+溶液 吸附 

分 类 号：TQ424.25[化学工程] X773[环境科学与工程—环境工程]