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Title: Consideration regarding treatment possibilities of drinking water supplies containing nitrogen compounds
Authors: Cosma, Cristiana
Nicolau, Margareta
Ballo, Aureliea
Stefanescu, Mihai
Bumbac, Costel
Keywords: Groundwater
Nitrogen compounds
Associated pollutants
Water treatment
Issue Date: 2011
Publisher: National Research and Development Institute for Industrial Ecology, INCD-ECOIND
Abstract: The paper presents some relevant aspects related to the influence of pollution matrix specific to the groundwater supplies, upon the treatment technologies applied in order to remove the inorganic nitrogen - based compounds (ammonium, nitrite, nitrate ions). The main association of ammonium (NH4+) with inorganic/organic pollutants in groundwater are, as follows:  NH4+ and metallic ions (Mn  Fe);  NH4+ and sulphur derivatives (S2-, S2O32-, SO32-);  NH4+ and nitrite/nitrate ions (NO2-/ NO3-);  NH4+ and natural organic matter (NOM - THMs precursors) in the presence of bromide ion (Br-). Also, the concentration levels of nitrogen - based compounds and associated pollutants are very important in the selection of suitable treatment procedures, including the succession of treatment steps. The treatment technologies developed for NH4+ and NO3- ions removal from groundwater supplies have as specific steps: breakpoint chlorination (NH4+) or biological nitrification (NH4+) and denitrification (NO2-/ NO3-) processes. Among the main problems specific for the most applied technology at industrial level for NH4+  oxidizable pollutants removal (one step chlorination), are mentioned:  low treatment efficiency (NH4+, S2-);  generation of trihalometanes (THMs), especially brominated ones, with unpleasant consequence upon the treated water quality, which is not proper for human consumption.
Description: Volume I
International Symposium "The Environment and the Industry" SIMI
ISSN: (on-line)2457-8371
L 1843-5831
Appears in Collections:SIMI 2011

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