Pollution of nitrate in Moroccan ground water: removal by electrodialysis

Nitrate content in surface water and especially in ground water have increa sed in Morocco and other areas of the world, Several processes including de gradation processes and separation processes can remove nitrate from water. As separating processes, an electrodialysis operation was performed to rem ove nitrate from a ground water. Preliminary a brief reviews of the nitrate ground water pollution in Morocco was presented. A preselection of several commercial membranes was carried out to determine the best anionic exchang e membrane for nitrate removal. The selected membrane transports anions in the following order: NO3- > Cl- > HCO3- > SO42-. The results show that a de sired product water quality can easily be obtained by electrodialysis. The electrodialysis is a simple process to remove nitrate from ground water.