• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Electrochemical coagulation for oily water demulsification
【24h】

Electrochemical coagulation for oily water demulsification

机译：电化学混凝用于油性水的破乳

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Motor oil and industrial surfactants were used to prepare synthetic oily water.When stabilized with surfactant,the turbidity shows a positive correlation with the oil content in the emulsion with a correlation coefficient of 1.78 FAU/(mg/L).The oil-water emulsion was tested with gravity separation,centrifugation,flotation,and electrochemical coagulation for the effectiveness of each process on demulsification.Electrochemical coagulation was then selected for further study.A dc voltage was applied to the electrodes,dissolving ferrous ions(Fe(II))at the anode and forming hydrogen(H2)gas and hydroxyl(OH-)ions at the surface of the cathode.A few 100 mg/L of sodium chloride(NaCl)were added to the solution to provide ionic conductivity and to prevent passivation of the iron electrode.The ferrous ions were oxidized into ferric ions(Fe(III)),destabilizing the emulsion.The coalesced oil droplets were adsorbed into the highly dispersed and reactive ferric hydroxide(Fe(OH)3)coagulant.The oil-rich sludge that was generated in the operation was then floated to the surface forming a blanket that was removed by skimming.This complicated mechanism was completed in 4 min.When the reactor was operated for this amount of time,a measure of 165.8 mg/L of ferric ions was generated.The treatment reduced the turbidity of the emulsion from 1800 to 60FAU.Beyond the 4-min treatment period,the addition of more iron to the system resulted in turbidity change at a much slower rate.When the operation occurred continuously with a current of 2 A and a throughput of 320 mL/min,the turbidity of the electrically treated effluent was less than 14 FAU,the detection limit of the Hach DR/4000 Spectrophotometer.
机译：用机油和工业表面活性剂制备合成油性水。用表面活性剂稳定后，浊度与乳液中的油含量呈正相关，相关系数为1.78 FAU /（mg / L）。通过重力分离，离心，浮选和电化学混凝测试了每个过程对破乳的有效性。然后选择电化学混凝进行进一步研究。将直流电压施加到电极上，在室温下溶解亚铁离子（Fe（II））在溶液中加入100 mg / L的氯化钠（NaCl）以提供离子电导率并防止其钝化。铁电极。亚铁离子被氧化成三价铁离子（Fe（III）），使乳液不稳定。聚结的油滴被吸附到高度分散的反应性氢氧化铁（Fe（OH）3）凝结剂中。然后将操作中产生的污泥浮到表面上，形成覆盖物，然后通过撇除将其除去。这种复杂的机制在4分钟内完成。当反应器运行此时间量时，测量值为165.8 mg / L处理将乳状液的浊度从1800降低到60FAU。在4分钟的处理时间后，向系统中添加更多的铁导致浊度变化的速度要慢得多。在2 A的电流和320 mL / min的处理量下，经过电处理的流出物的浊度小于14 FAU，这是Hach DR / 4000分光光度计的检测极限。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号