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  • noun

Antonyms for alkalinity

pH values above 7

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After acclimatization was completed (22 days duration), the proposed treatments of alkalinities of 40, 80, 120 and 160 mg x [L.sup.-1] CaC[O.sub.3] were achieved and maintained over the next 27 days of the experiment (F igure 1).
In general, the native species tested -- mainly eucalypts and acacias -- had lower nutrient contents and ash alkalinities than the exotic species and would therefore be expected to have less impact on acidification.
THEORETICAL ALKALINITIES FOR KEY ALKALIS Alkali Alkalinity Increase (CaC[O.sub.3]/ppm alkali added) Quicklime (CaO) 1.78 ppm Hydrated lime (Ca[[OH].sub.2]) 1.35 Caustic soda (NaOH) 1.28 Soda ash ([Na.sub.2]C[O.sub.3]) 0.94 Sodium bicarbonate (NaHC[O.sub.3]) 0.60 Example: If 10 ppm of caustic soda were added to a raw water source with 30 ppm of alkalinity as calcium carbonate (CaC[O.sub.3]), the alkalinity would theoretically increase to 42.8 ppm as CaC[O.sub.3].
A 4x4 experimental matrix was evaluated, including alkalinities of 10, 50, 100, and 250 mg/L at levels of pH including 7, 7.5, 8, and 8.5.