废FCC催化剂吸附苯酚废水

将炼油厂排放的废FCC(fluid catalytic cracking,流化催化裂化)催化剂粉末(含稀土元素2%)进行酸浸处理,其中的稀土及有价金属进入浸出液后得以回收,粉末残渣经过水洗、干燥后,分析其结构,并进行吸附苯酚废水的实验,考察吸附时间、苯酚的初始浓度、吸附温度及吸附方式等对苯酚吸附量的影响,分析废FCC催化剂残渣对苯酚的等温吸附特性。结果表明,吸附达到平衡需要60 min;pH在7.0~8.0时,苯酚的吸附量较大;苯酚的初始浓度越高,吸附量越大;温度对苯酚吸附量的影响较显著;Freundlich方程和Langmuir方程都可用于描述废FCC催化剂残渣对苯酚的等温吸附特征,Langmuir方程更为准确,通过计算,理论饱和吸附量为36.751 mg/g,实验测得饱和吸附容量为35.540 mg/g。

Adsorption of phenol by spent FCC catalyst residue from wastewater

The spent FCC catalyst powder(containing 2% rare earth) discharged from oil refinery was disposaled by acid leaching and separation process firstly,and the rare earth and valuable metals from the catalyst dissolution in the leaching solution were recovered separately.Then the spent FCC catalyst powder residue was washed with water and dried for the analyse of the structure and the study of adsorption of phenol.The influences of adsorption time,initial Phenol concentration,temperature and adsorption types on the sorption were investigated and the isothermal adsorption characteristics on adsorption of Phenol in wastewater by spent FCC catalyst residue were studied.The results show that the equilibrium time of this experiment is about 60 min;the Phenol adsorptive capacity is larger when 7.0