摘要
采用水热合成法以煅烧高岭土为原料合成了纳米级 X型沸石分子筛 ,并采用透射电镜 (TEM)和 X射线衍射 (XRD)进行了表征。研究了影响纳米 X型沸石分子筛对 Cu(II)吸附的因素 ,包括纳米 X型沸石分子筛用量、p H值、接触时间和温度。结果表明 :投加 0 .4g纳米 X沸石分子筛 ,在 p H为 5.0、温度为 2 5℃、吸附时间为 1 0 min情况下 ,去除率达到 99.65% ,最大吸附量可达 1 0 1 .4mg/ g。采用0 .5 mol/ L的 Na2 EDTA能较完全洗脱纳米级 X型沸石分子筛所吸附的 Cu(II) ,表明纳米级 X型沸石分子筛能循环使用 ,可应用于含铜废水的处理。
The present paper intends to study Nano-meter X-zeolite prepared by calcined kaolin and powders characterized by TEM and XRD. It has also studied the absorption of nano-meter X-zeolite to copper ion(II) , the dosage of nano-meter X-zeolite, pH value, time of contaction and the temperature of wastewater on the absorption of Cu(II) with nano-meter X-zeolite. The results of our study show that the ration of removal should be 99.65% when the pH value is kept at five, it is necessary to stir the dosage with the nano-meter X-zeolite of 0.4 g for ten minutes at 25 ℃. The maximum absorption proves to be 101.4 mg Cu(II)/g while Cu(II) —abso1utely eluted by 1 mol/LNa_2EDTAl solution. Then, the absorption percentage of the recovered nano-meter X-zeolite will remain high. A series of trial application shows that the method can be used to treat Cu(II)pollution in water efficiently.
出处
《安全与环境学报》
CAS
CSCD
2004年第1期80-83,共4页
Journal of Safety and Environment
关键词
环境工程
水热合成法
X型沸石
制备
铜离子
吸附
environmental engineering
calcined kaolin
X-zeolite
preparation
copper ion
absorption
