Hi All
I'm working on improve water quality for some wells in my city and i noticed when I use sand filter the pH values decrease but TDS values may increase and may be not affected , any one deal with this kind of problems?
Well,
No direct relation between pH and TDS, but the carbonate, bicarbonate and CO2 concentration as a part of TDS can affect on the values of pH. Here, the TDS increases may due to the dissolution and the type of sand minerals like calcite and or Gypsum granules, etc. pH decrease or increased due to variations in H concentration which depends on Redox potential reaction and ion exchange.
Regards
Well,
No direct relation between pH and TDS, but the carbonate, bicarbonate and CO2 concentration as a part of TDS can affect on the values of pH. Here, the TDS increases may due to the dissolution and the type of sand minerals like calcite and or Gypsum granules, etc. pH decrease or increased due to variations in H concentration which depends on Redox potential reaction and ion exchange.
Regards
To begin with, there are no proven linear relationship between pH and TDS. You might find the solution for your problem if a comprehensive water quality analysis is conducted.
Dear Musa Al-Shammari
I think, there is no direct relation between pH and total dissolved solids but TDS is related with conductivity and this in turn affects the pH value.
Regards
Dear Khalid Turki
I know there is no direct relation between pH and TDS but I notice there is effect but its I can not recognize
many different expermintes was done and thus I seek for help
Thanks for your replay @Khalid Turki Rashid
It depends on which kind of cations/anions your sand filters are removing more. If it is removing acidic cations more the pH of filtrate may increase, or vice versa. There is no direct relationship between pH and TDS, how ever the nature of cation effect pH.
Dear Musa,
If there is ammonium in the water, it can be nitrified during sand filtration, which will lower the pH. I guess this will also increase the TDS, as the nitrate is higher mass than the ammonium due to the incorporated oxygen. A similar effect would occur with any reduced sulfur present. I do not know if this is helpful to you, but I wish you luck!
- Peter
Dear Peter and Nadeem
Thanks for your response... I appreciate your opinion
Thanks again
Musa
Dear Musa
The TDS increases due to type of sand minerals, and my suggestion is that take different types of filters from different locations and check TDS .
Thanks
Thanks for your response dear Ahmed Sagban. I will try your suggestion
Thanks again
I agree@ Bayan Hussien for your comment " No direct relation between pH and TDS, but the carbonate, bicarbonate and CO2 concentration as a part of TDS can affect on the values of pH. Here, the TDS increases may due to the dissolution and the type of sand minerals like calcite and or Gypsum granules, etc. pH decrease or increased due to variations in H concentration which depends on Redox potential reaction and ion exchange".
Dear Omar
Thanks for your response I will wait sand chemical composition and update the results
Thanks again @Omar_Al-Khashman
Good work for public health engineering . You can plot the different water quality
parameters w.r to the different city area . A comprehensive bar Chart ,area wise
will give a good trend of pH vs TDS , TDS vs Hardness etc. Obviously you can measure Total and Permanent Hardness .
Mineral water must contain a quantity of dissolved solids ranging from 50 to 800 mg / L. The term "low-content mineral water" is referred to as water containing dissolved substances less than 1500 mg / And "high-content mineral water" on water containing dissolved solvents of more than 1500 mg ter.
There is no direct relationship with pH & TDS in water system. Moreover in a isolated water system the TDS can never increase it will always decrease due to oxidation/precipitation of metals in higher state.
The increase in TDS of water can only be observed if the water is in contact with other minerals, soil, mud etc in the surroundings.
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