Verfahren zur Entfernung von Nitrat aus Wasser und Verwendung von gelbem Bismuthydroxid als Anionenaustauschermaterial

The invention relates to a process for the removal of anions from water for the treatment of waste water or the purification of water by means of ion exchangers. The invention proposes the yellow bismuth hydroxide for the ion exchanger, produced by precipitating bismuth salt solutions with excessive lye. The invention further relates the application of the process for separating nitrate and/or sulphate and/or chloride and/or phosphate