Standard Test Method for Aluminum in Water

Importancia y uso:

5.1 Although there is little information available concerning the toxicological significance of aluminum in man, the American Water Works Association has established a water quality guideline or goal of a maximum of 0.05 mg/L. Under the National Pollution Discharge Elimination System (NPDES), some permits may set aluminum discharge limits. Some evidence does exist to indicate that low levels (5 mg/L) will interfere with activated sludge processes. For the above reasons monitoring of aluminum may be desirable.

5.2 Aluminum is monitored in boiler make-up water, where alum has been used, to determine whether aluminum is present after pretreatment. Residual aluminum may consume ion exchange capacity or consume boiler water treatment chemicals added to stoichiometrically chelate hardness ions (that is, calcium and magnesium) in boiler feed water.

5.3 Aluminum is monitored in cooling water make-up, since its presence may result in deactivation of anionic substances in scale or corrosion inhibitor treatment chemicals, or both. Deactivation may result in decreased performance of inhibitors.

5.4 ICP-MS may also be appropriate but at a higher instrument cost. See Test Method D5673.

Subcomité:

D19.05

Referida por:

D1971-16R21E01, D4195-23, D5091-23, D4309-18, E3439-25

Volúmen:

11.01

Número ICS:

13.060.50 (Examination of water for chemical substances)

Palabras clave:

aluminum; analysis; atomic absorption flame; water;