For tests conducted in the presence KH2PO4, we noted that the abatement rate (HCO3
-, Ca2+, Mg2+)
also increases with the addition of KH2PO4 see fig 5.
We noticed that the abatement rate is the most important for Ca2+ (52.83%).
The residual concentration is about 80 mg / L is reached for an addition of 1 mg / L of KH2PO4 to the
waters of Fourchi at 30 ° C.
The Ca2+ concentration attained was 100 mg / L. For tests at 20 ° C, we found 3 mg / L addition of
KH2PO4 was obtained 200 mg / L of residual Ca2+, with a very low abatement rate of 5.66%.