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Chemistry Forums for Students => Physical Chemistry Forum => Topic started by: BHAVESH on January 17, 2020, 05:41:07 AM

Title: RO Concentrate Water parameters
Post by: BHAVESH on January 17, 2020, 05:41:07 AM

Hi Everyone,
As it is known fact that when concentration of mineral increases in RO Reject water, pH increases - How we can calculate this?
Secondly, in reject; some bicarbonate gets converted to carbonate, how to calculate this?

Title: Re: RO Concentrate Water parameters
Post by: Borek on January 17, 2020, 07:30:36 AM

Quote from: BHAVESH on January 17, 2020, 05:41:07 AM

As it is known fact that when concentration of mineral increases in RO Reject water, pH increases

Nope. It depends on what is being dissolved. Some things will increase the pH, some will lower it.

Title: Re: RO Concentrate Water parameters
Post by: BHAVESH on January 19, 2020, 03:01:05 AM

Ok, Borek.
In other way, is there any formula to calculate pH based on ionic strength of water?

Secondly, how to calculate conversion carbonate from bicarbonate???

Title: Re: RO Concentrate Water parameters
Post by: Borek on January 19, 2020, 03:25:29 PM

Quote from: BHAVESH on January 19, 2020, 03:01:05 AM

In other way, is there any formula to calculate pH based on ionic strength of water?

Same way you would do with any activity calculations, see for example http://www.chembuddy.com/?left=pH-calculation&right=ionic-strength-activity-coefficients

Quote

Secondly, how to calculate conversion carbonate from bicarbonate???

It doesn't convert on its own, I have no idea what you are asking.