• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Colloids and Surfaces, A. Physicochemical and Engineering Aspects >Investigation of FeCl_3 induced coagulation processes using electrophoretic measurement, nanoparticle tracking analysis and dynamic light scattering: Importance of pH and colloid surface charge
【24h】

Investigation of FeCl_3 induced coagulation processes using electrophoretic measurement, nanoparticle tracking analysis and dynamic light scattering: Importance of pH and colloid surface charge

机译：利用电泳测量，纳米颗粒跟踪分析和动态光散射研究FeCl_3诱导的凝聚过程：pH和胶体表面电荷的重要性

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

In water treatment processes, the optimal dosage of coagulant is highly dependent on suspended particle surface charge, size and concentration, pH and composition of water. One way to control the coagulation process can be based on the measurement of the electrophoretic mobility and determination of zeta potential. In this study we investigated the interaction between negatively charged polystyrene latex particles and iron(III) chloride as coagulant. We combined three methods, i.e. dynamic light scattering, nanoparticle tracking analysis, and modeling to thoroughly characterize our system. We have shown that stabilization of zeta potential occurred after 60-80 min after addition of coagulant. We demonstrated different behaviors of latex particles with FeCl_3 depending on the dosage of iron ions. The optimal dosage of FeCl_3 is equal to 1-2 mg/L for the rapid aggregation of 10 mg/L latex suspension. We found a good agreement between the aggregation rate and surface charge of the latex particles and that charge neutralization mechanism is responsible for particle aggregation. High dosage of coagulant was also found to result in formation of iron(III) hydroxide particles which diameter was about 200 nm. The initial pH is also important for latex particle coagulation. The lower initial pH of suspension is, the more rapidly the isoelectric point is achieved.
机译：在水处理过程中，凝结剂的最佳剂量高度依赖于悬浮颗粒表面电荷，大小和浓度，pH值和水的成分。控制凝固过程的一种方法可以基于电泳迁移率的测量和ζ电势的确定。在这项研究中，我们研究了带负电荷的聚苯乙烯胶乳颗粒与氯化铁（III）作为凝结剂之间的相互作用。我们结合了三种方法，即动态光散射，纳米粒子跟踪分析和建模，以全面表征我们的系统。我们已经显示，在添加凝结剂后60-80分钟后，zeta电位稳定下来。我们证明了FeCl_3乳胶颗粒的不同行为取决于铁离子的剂量。对于10 mg / L乳胶悬浮液的快速聚集，FeCl_3的最佳剂量等于1-2 mg / L。我们发现胶乳颗粒的聚集速率和表面电荷之间存在良好的一致性，并且电荷中和机理是颗粒聚集的原因。还发现高剂量的凝结剂导致形成直径约200nm的氢氧化铁（III）颗粒。初始pH对乳胶颗粒凝结也很重要。悬浮液的初始pH值越低，等电点的获得越快。

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