摘要
试验采用实验空合成的胶联蒙脱土作为吸附剂，对水中六种低浓度有机优先污染物（苯、甲苯、乙苯、二氯甲烷、氯仿和四氯化碳）进行了静态吸附实验．结果表明：胶联蒙脱土对六种有机物吸附平衡时间均小于２ｈ，吸附容量远远大于蒙脱土原土．对胶联蒙脱土进行的Ｘ衍射分析、吸水试验以及加热再生试验表明，聚铝阳离子进入蒙脱土层间，使蒙脱土（００１）层间距扩大到２１１ｎｍ，胶联蒙脱上对水的亲合力较原土大幅度降低；在１５０℃下的吸附剂再生结果令人满意．最后本试验认为．粘土物质经过适当的表面处理，可能成为吸附剂应用于水中有机优先污染物的去除．
Batch adsorption experiments of benzene, toluene, ethylbenzene,dichloromethane, trichloromethane and carbon- tetrachloride in aqueous solution are carried out using laboratory - synthetic cross - linking montmorillonite in this paper. The results show that adsorption equilibration take to the six organics is less than 2 hours and maximum adsorption capacity reaches 4.5 mg·g-1 for carbon - tetrachloride (equilibrium concentration is 1 - 2 mg·L-1 at 25℃). X - ray diffractial, specific surface and water absorptive capacity results demonstyated that Al-cationic polymers enter the interlamellar space of montmorillonite and enlarge (001) spacing from 1.501nm to 2.11nm, and affinity between water and clay's surface decreases on a large scale. Regeneration experiments are made at 150℃, and results are satisfactory. Finally, we think modified clays can be used as adsorbents to clean up wastewater after proper treatment.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
1995年第4期408-412,共5页
Journal of Tongji University:Natural Science
基金
同济大学和法国立安水务公司资助
关键词
胶联蒙脱土
水处理
有机污染物
静态吸附
Cross-linking montmorillonite
Organic priority pollutants
Adsorption
Water treatment
