油页岩渣制备沸石及其吸附Cr^6＋性能  

Preparation of Zeolite from Oil Shale Residue and Its Adsorption Property to Cr^(6+)

作　　者：刘艳辉[1,2] 薛向欣[1] 宋海[2] 

机构地区：[1]东北大学材料与冶金学院硼资源生态化综合利用技术与硼材料重点实验室,辽宁沈阳110004 [2]沈阳理工大学材料科学与工程学院,辽宁沈阳110168

出　　处：《过程工程学报》2008年第6期1108-1111,共4页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50674024)

摘　　要：系统研究了油页岩渣合成沸石过程中NaOH浓度、熔融温度、晶化时间、晶化温度对沸石生成及其Cr6+吸附性能的影响.结果表明,NaOH浓度和晶化时间主要影响沸石的种类;沸石对Cr6+的吸附率随其制备的熔融温度、晶化时间、晶化温度的增加有增大的趋势,但随NaOH浓度降低而增加;沸石对1mg/L含铬模拟废水中Cr6+的最大吸附量为1.120mg/g,吸附率达到89.6%.考虑到成本,最佳合成条件为:NaOH浓度4.6mol/L,熔融温度400℃,晶化时间72h,晶化温度140℃.The formation and Cr^6＋ adsorption capability of zeolite synthesized after alkaline activation of a Chinese oil shale residue, and the effects of NaOH concentration, fusion temperature, aging time and aging temperature in closed systems on its adsorption to Cr^6＋ were investigated. NaOH concentration and aging time affected mainly the crystallinity of zeolite formed. Cr^6＋ adsorption capability of synthesized products increased with increasing fusion temperature, aging time and aging temperature. Cr^6＋ adsorption capability of synthesized zeolite decreased with the increase of NaOH concentration, reached its maximum adsorption capacity and adsorption rate for simulated 1 mg/L Cr^6＋ polluted water were 1.120 mg/g and 89.6% respectively. From the economic point of view, the optimal conditions are determined as follows： NaOH concentration of 4.6 mol/L, fusion temperature of 400 ℃, aging time of 72 h, and aging temperature of 140 ℃.

关 键 词：沸石 水热合成 油页岩渣 Cr^6+吸附性能 

分 类 号：TQ174[化学工程—陶瓷工业]