Thermo Fisher Scientific Eutech DO 700 - Manual (Page 25)

21
Some pollutants such as acid mine drainage produce direct chemical
demands on oxygen in the water. DO is consumed in the oxidation-
reduction reactions of introduced chemical compounds such as nitrate
(NO
3
1- ) and ammonia (NH
4
1+ ), sulfate (SO
4
2- ), and sulfite (SO
3
2- ) and
ferrous (Fe
2
+
) and ferric (Fe
3
+
) ions.
These are important consideration for water and wastewater treatment
industry.