摘要
煤矸石采用碱熔-水热法合成沸石,在沸石投加量为2.5 g/L,含磷废水初始浓度5 mg/L条件下,探究合成条件对磷去除率的影响。结果表明,煤矸石合成沸石基吸附剂的最佳条件为:焙烧温度700℃,硅铝比3∶1,钠硅比1.9∶1。合成的沸石是纯度较高、晶型完整、颗粒大小均匀,孔径均一、呈棱角分明的八面体结构的X型沸石,其比表面积约为354.8 m^2/g,最可几孔径为3.8 nm,对模拟含磷废水的磷去除率69%,比原煤矸石的去除效果提升4倍以上。
Zeolite was synthesized from coal gangue by alkali melting and hydrothermal method.The influence of synthesis condition on phosphorus removal rate were investigated under simulated phosphorous wastewater with zeolite dosage of 2.5 g/L and initial concentration of 5 mg/L.The synthetic conditions were investigated and the adsorption experiments were carried out.The results show that the optimum conditions for the synthesis of zeolite based adsorbents from coal gangue are as follows:calcination temperature 700℃,ratio of silicon to aluminum 3∶1,ratio of sodium to silicon 1.9∶1,the synthesized zeolite is characterized by high purity,complete crystal form,uniform particle size and uniform pore size.Zeolite X with a sharp octahedral structure.Its specific surface area is about 354.8 m^2/g,and the most probable pore size is 3.8 nm,the removal rate of simulated phosphorous wastewater by the zeolite X is about 69%,which is 4 times than that of coal gangue.
作者
王思阳
王晓丽
臧晔
WANG Si-yang;WANG Xiao-li;ZANG Ye(College of Chemistry and Environmental Sciences,Inner Mongolia Normal University,Hohhot 010022,China;Inner Mongolia Key Laboratory of Environmental Chemistry,Hohhot 010022,China)
出处
《应用化工》
CAS
CSCD
北大核心
2019年第5期1071-1075,共5页
Applied Chemical Industry
基金
国家自然科学基金资助项目(21567020)
内蒙古自治区水环境安全协同创新培育中心(XTCX003)
关键词
煤矸石
X型沸石
磷去除率
表征
coal gangue
zeolite X
phosphorus removal rate
character
