天然有机物对纳滤水处理工艺的影响

Effect of Natural Organic Matter on Nanofiltration Membrane Process in Water Treatment

天然有机物(NOM)广泛存在于天然水体中,对纳滤处理过程产生较大影响。该文在介绍NOM的组成和物化性质的基础上,讨论了NOM对截留率和膜通量的影响,阐述了纳滤过程中NOM的亲、疏水性,浓差极化效应,静电排斥作用,氢键作用,二价离子络合等对纳滤过程的影响机理,对提高纳滤膜过滤性能有重要意义。

Natural organic matter （NOM）is ubiquitous in natural surface waters and has major effect on the water treatment during the nanofiltration （NF）process. The compositions and properties of NOM were introduced and its influences on the rejection and flux of NF were discussed. These influences of hydrophilicity/hydrophobicity of NOM,concentration polarization effect,electrostatic repulsion effect,the hydrogen bonding interaction and divalent ion chelating on nanofiltration were expunded. The effect mechanisms have important significance to improve the nanofiltration membrane performance.