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 ℃.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
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)
关键词
沸石
水热合成
油页岩渣
Cr^6+吸附性能
zeolite
hydrothermal synthesis
oil shale residue
Cr^6＋ adsorption capability
