层状氢氧化镁铝焙烧产物对SCN^-的吸附性能  

Adsorption of Calcined Mg/Al Layered Double Hydroxides for Thiocyanate Ion

作　　者：宋卫得[1] 王海增[1] 郭鲁钢[1] 李冬梅[1] 邢坤[1] 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100

出　　处：《化学研究》2007年第3期75-79,共5页Chemical Research

基　　金：国家自然科学基金资助项目(20477041)

摘　　要：研究了层状氢氧化镁铝焙烧产物对SCN-的吸附行为,考察了焙烧温度、吸附温度、时间、pH值等因素对吸附的影响.在SCN-初始浓度为25 mg/L,温度为40℃,焙烧物投加量为2 g/L,pH值为6的条件下,4 h达到吸附平衡,SCN-脱除率可达96.91%.吸附过程符合Langmu ir等温方程式,主要是单分子层的吸热吸附.The adsorption performance of calcined Mg/Al layered double hydroxides for thiocyanate ion was studied. The effects of calcined temperature of Mg/Al layered double hydroxides and adsorption temperature, adsorption time, pH value were investigated. The removal rate of SCN- is 96.91%, when original concentration of thiocyanate ion is 25 mg/L, adsorption temperature is40 ℃, sorbent dosage is 2 g/L, pH value is 6 and adsorption time is 4 h. Equilibrium data were fitted very well to the Langmuir mode in the entire saturation concentration range, indicating that the adsorption was endothermic process and of monomolecular layer.

关 键 词：SCN- 层状氢氧化镁铝 焙烧 吸附 脱除 

分 类 号：O647.3[理学—物理化学]