焙烧层状氢氧化镁铝对水中氟离子的吸附性能  

STUDY ON THE EFFECT OF ADSORBING FLUORINE ANION BY LAYERED DOUBLE HYDROXIDES

作　　者：李冬梅[1] 王海增[1] 王立秋[1] 赵正鹏[1] 

机构地区：[1]中国海洋大学化学化工学院,青岛266003

出　　处：《离子交换与吸附》2007年第2期103-111,共9页Ion Exchange and Adsorption

基　　金：国家自然科学基金项目(20477041)

摘　　要：研究了焙烧层状氢氧化镁铝（CLDH）对水中氟离子的吸附性能，考察了焙烧温度、吸附时间、吸附剂用量、溶液pH值等条件对吸附的影响。发现在较宽的pH（5.5～9.5）值范围内，CLDH对水中氟离子具有良好的吸附能力，室温下0.2g CLDH可将50mL浓度为15mg／L氟离子溶液处理为符合舍氟标准的饮用水。吸附平衡符合Langmuir方程，在60min内达到饱和吸附，室温下饱和吸附量为22.64mg／g。吸附饱和后的CLDH焙烧再生，循环使用5次后饱和吸附量为10.37mg／g。The adsorption of fluorine in water by Calcined Layered Double Hydroxides was studied. The effects of calcined temperature, adsorption time, sorbent dosage, pH value on adsorption were investigated. The experimental results showed that the calcined product had an excellent performance in adsorbing fluorine, at a wide pH （5.5-9.5） value range, it decreased the concentration of F from 15mg/L to under 1mg/L with 4g/L of Calcined Layered Double Hydroxides. The adsorption happened in 60min and was in conformity with the Langrnuir isotherm type equation, the adsorption capacity was 22.64mg/g. The adsorption capacity reduced to 10.37mg/g when they were regenerated by thermal decomposition method.

关 键 词：层状氢氧化镁铝 吸附 氟离子 焙烧 

分 类 号：O647.3[理学—物理化学]