摘要
针对水面浮油的去除问题,通过对新型吸附材料-膨胀石墨的扫描电镜观察,从其结构特征的角度揭示了膨胀石墨的吸油机理,首次系统地研究了温度、时间、pH等操作条件对吸附油性能的影响。扫描电镜的结果显示膨胀石墨的鳞片厚度都在100 nm以上,而且以大孔、超大孔为主,这种结构赋予了膨胀石墨独特的吸附特性。操作条件对膨胀石墨的吸附性能有重要的影响,在本实验条件下即在酸(中)性条件下,吸附时间1 min^2 min左右,转速为660 r/min膨胀石墨可达到饱和吸附量。
The exfoliated graphite＇s （EG） surface structure was observed by using scanning election microscopy （SEM） and a mechanism was proposed. The effects of operational conditions to the removal efficiency were investigated. The thickness of the layer of exfoliated graphite is more than 100 nm and constituted of macropore. Such a structure makes exfoliated graphite behave higher specific sorption than other adsorbent for oil. The operational conditions have significant effects on the oil removal efficiency, while in the acid environment, the operational time is about 1 min - 2 rain, the velocity is 660 r/min, exfoliated graphite can reach its saturated sorption capacity.
出处
《环境科学与管理》
CAS
2009年第4期84-86,93,共4页
Environmental Science and Management
基金
国家"863"攻关专项资助项目(2002AA601140)
关键词
膨胀石墨
微观结构
吸附
柴油
expanded graphite
microstructure
adsorption
diesel oil
