Thermo Fisher Scientific EcoScan DO 6 - Manual (Page 75)

Instruction Manual DO 6
67
In boiler water application, presence of oxygen in the water will increase
corrosion and helps build up boiler scale that inhibits heat transfer. In such
instance it is critical to keep DO concentration to a minimum.
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.