Abstract:

Filtrating process is used widely in water treatment.Deep bed filtrating effect is influenced by surface potential of filter media greatly.Quartz sand has a much negative surface potential which impact on its effect.The contrasts of surface potentials and filtrating effect of quartz sand,iron oxide coated sand and compound coated sand show that the compound coated sand has a steady and favorable filtrating effect attribute to its near neutral surface potential.

Key words: filtration, coated sand, surface potential

摘要：

滤床过滤工艺广泛应用于水处理领域，滤料表面电位对水中悬浮颗粒的过滤去除有很大的影响。石英砂滤料表面带较高的负电位，一些情况下不利于悬浮颗粒的去除。对石英砂、氧化铁改性滤料、复合改性滤料的表面电位和过滤效果的对比表明，复合改性滤料表面电位接近于中性，对水中的悬浮颗粒有稳定良好的去除效果。

关键词: 过滤, 改性滤料, 表面电位

CLC Number: 

• TQ028.5+3