Study of removing organic matter in drinking water by NF membrane
The properties of organic and inorganic matter removals by ESNA 1-2012 nanofiltration(NE) membrane were studied.The results showed that there is close relation between the organic matter removal and the molecular weight,but the rejections don’t always increase with molecular weights increased.When the molecular weight of organic matter is less than the molecular weight cutoff(MWC)of NF membrane.the differences of organlc rejections are great and the mechanism controlling organic rejections is charge repulsion between membrane and organic matter.Here it iS the physicochemical characteristic parameters that mainly affect the organic matter removal.When the molecular weight of organic substance is greater than the MWC of NF membrane,the organic rejections are all great and their differences are small.At the time the mechanism controlling organic rejections are size exclusion and charge repulsion.It is the molecular weight and physicochemical characteristic parameters of organics that affect the organics removal.The organic matter rejections by most NF membranes were similar while the inorganic matter rejections were widely different.When purifying drinking water,it should be sensible to select NF membrane according to the salt contents of the water sources.
nanofiltration membrane drinking water organic matter physicochemical characteristic parameters inorganic matter
YANG Jing CHEN Jie-Rong YU Rong
School of Energy & Power Engineering,Xian Jiaotong University,Xian 710049.China;School of Environm School of Energy & Power Engineering,Xian Jiaotong University,Xian 710049.China School of Environment & Chemistry Engineering,Xian Polytechnic University,Xian 710048,China
国际会议
西安
英文
191-197
2008-05-15（万方平台首次上网日期，不代表论文的发表时间）