The pH value issue of saltwater in the resin tower
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This post was last edited by sunjl1981 on 2013-1-6 at 22:17. Please discuss the impact of the pH value of the brine fed into the resin tower on the parameters of the effluent water. # hcbbs
This post was last edited by yzhms on 2009-12-2 at 17:14; keeping the pH level of the brine in the resin tower between 9 and 10 ensures the best adsorption capacity of the resin
This issue has been discussed many times on the forum, mainly focusing on the working principle of the resin – whether it adopts a hydrogen form under acidic conditions or a sodium form under alkaline conditions – as well as whether the hydroxides formed in cases of excessive alkalinity can clog the resin.
When it comes to the adsorption of metals such as calcium and magnesium by saline solutions, not only the temperature of the saline solution but also its pH value needs to be taken into account; a pH range of 8.5 to 9.5 provides the best adsorption capacity for heavy metals like calcium and magnesium
The requirements for pH control mentioned on the 2nd and 4th floors are different. I remember it should be between 9 and 11; I just don’t know which one is correct now
The requirements for pH control mentioned on the 2nd and 4th floors are different. I remember it should be between 9 and 11; I just don’t know which one is correct now
A pH value of 10±0.5 for the brine entering the resin tower is preferable.
What are the consequences if the brine entering the resin tower is too alkaline or too acidic?
It relates to the working principle of the resin: the discussion focuses on whether it takes on a hydrogen form under acidic conditions or a sodium form under alkaline conditions. At excessively high alkalinity levels (above 11), the hydroxides formed can clog the resin; therefore, the resin column exhibits its strongest adsorption capacity at a pH of 9–10.