Fig. 3: Relationship between optimum dosage of the best alkaline agent (Ca(OH)2 + Na2CO3) and seawater salinity (n = 3, means ± standard deviations).

Salinity was adjusted (0–3.5%) by diluting artificial seawater with distilled water.

Salinity was adjusted (0–3.5%) by diluting artificial seawater with distilled water.