Removing nitrate from water, esp. drinking water

Catalytic degradation of nitrate in water involves reducing the nitrate to nitrogen, using a metal catalyst and an agent (I). The novelty is that (I) consists of formic acid and/or its salt. Pref. the catalyst is a bimetallic catalyst, and is used in finely divided form enclosed in hydrogel (esp. PV...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PRUESE, ULF., 38100 BRAUNSCHWEIG, DE, VORLOP, KLAUS-DIETER, DR., 38102 BRAUNSCHWEIG, DE
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CHEMISTRY METALLURGY TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Catalytic degradation of nitrate in water involves reducing the nitrate to nitrogen, using a metal catalyst and an agent (I). The novelty is that (I) consists of formic acid and/or its salt. Pref. the catalyst is a bimetallic catalyst, and is used in finely divided form enclosed in hydrogel (esp. PVA) particles. The process is carried out at 15 deg C or below and pH 3-10. The nitrate content is measured and (I) or its salt is dosed corresp. (pref. continuously). The pH os kept in a predetermined range during continuous or batchwise addn. of (I) or its salt.