摘要
船舶油污水中油滴表面带电性质对于油滴的聚结分离具有重要的影响。搭建了感应式油水界面带电特性检测系统,测量了油水界面zeta电势(油水界面带电特性)随NaCl和阳离子活性剂CTAB含量的变化规律。实验结果表明,随着水中NaCl含量的增加,油水界面的zeta电势随之降低,即油滴表面电荷密度随之减少,这会有利于油滴的聚合。当水中含盐量达到一定值时,油水界面zeta电势趋于稳定。此外,随着阳离子活性剂CTAB含量的增加,油水界面zeta电势会逐渐变正,并且当CTAB的浓度为3.66m M时,油水界面zeta电势接近零。
The surface charge of oil droplets in bilge water has an important impact on the coalescence of oil droplets and oily water separation.An inductive detection system was developed to measure the electrical potential of oil-water interface.With the measurement system,the dependence of the zeta potential on concentration of NaCl and CTAB was achieved.The experimental results showed that the zeta potential of the oil-water interface decreased with the increasing of NaCl concentration in the bilge water,ie the surface charge density of the oil droplets decreased,which was favorable to the coalescence of oil droplets.When the concentration of NaCl increased to a certain high value,the zeta potential of oil-water interface remained constant.In addition,the zeta potential of the oil-water surface gradually increased to a positive value with the increase in the CTAB concentration.Importantly,when the concentration was 3.66 mM,the charge amount of the oil-water interface was zero.
作者
戴武
孟雄飞
冯盎然
宋永欣
DAI Wu;MENG Xiong-fei;FENG Ang-ran;SONG Yong-xin(Department of Power Engineering,Bohai Shipbuilding Vocational College,Liaoning Huludao 125105,China;Department of Naval and Marine Engineering,Shandong Jiaotong University,Shandong Weihai 264209,China;Department of Marine Engineering,Dalian Maritime University,Liaoning Dalian 116026,China)
出处
《当代化工》
CAS
2020年第1期19-22,36,共5页
Contemporary Chemical Industry
基金
国家自然基金“油水界面电荷电动调控及强化船舶油污水分离机理研究”,项目编号:51679023.
关键词
油水界面
ZETA电位
电荷调控
油滴聚合
Oil-water interface
Zeta potential
Surface charge regulation
Oil coalesce
