Belgian Anthias
Valuable Member
In seawater the presence of calcium and magnesium is high. pH is above 7.9. What prevents Struvite to be formed using available phosphate?
When dolomite is used in a calcium reactor and CO2 is added
Dolomite will contribute equivalent quantities of cations and anions so increases in total hardness and total alkalinity following liming will be equal.
CaMg(CO 3 ) 2 + H 2 O + CO 2 ↔ Ca 2+ + Mg 2+ + 2HCO 3 - + CO 3 2-
If the water contains phosphate it may be used to form Struvite NH4MgPO4·6H2O if enough ammonium is available, this way removing phosphate and ammonium.
When dolomite is used in a calcium reactor and CO2 is added
Dolomite will contribute equivalent quantities of cations and anions so increases in total hardness and total alkalinity following liming will be equal.
CaMg(CO 3 ) 2 + H 2 O + CO 2 ↔ Ca 2+ + Mg 2+ + 2HCO 3 - + CO 3 2-
If the water contains phosphate it may be used to form Struvite NH4MgPO4·6H2O if enough ammonium is available, this way removing phosphate and ammonium.
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