The application of reverse osmosis and nanofiltration to the removal of nitrates from groundwater

被引：96

作者：

Bohdziewicz, J ^{[1
]}

Bodzek, M ^{[1
]}

Wasik, E ^{[1
]}

机构：

[1] Silesian Tech Univ, Inst Water & Wastewater Engn, Fac Environm Energy Engn, PL-44100 Gliwice, Poland

来源：

DESALINATION | 1999年 / 121卷 / 02期

关键词：

nanofiltration; reverse osmosis; nitrates; drinking water;

D O I：

10.1016/S0011-9164(99)00015-6

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The intensive development of agriculture and application of chemicals led to the contamination of many natural water reservoirs and groundwaters with nitrates. This paper reviews an attempt at removal of nitrate ions from tap water by means of the combined processes of reverse osmosis and nanofiltration. In the first stage, the water was filtered on nanofiltration membranes which resulted in the absence of bivalent ions in the obtained permeate. Then the filtrate was concentrated using reverse osmosis. Because the substances forming membrane scale (CaSO4, CaCO3) were removed from the filtrate, the efficiency of this process was limited mainly by the osmotic pressure of the retentate.

引用

页码：139 / 147

页数：9

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