Improving color in water

[matthomas51]

I am trying to find a method for improving color in water. The color in the water is not particulate matter or suspended matter. It has a slightly brown color that needs to be improved. We don't have a ton of details on the color only that it is brown colored water.

Can this be improved using any means of filtration or active carbon?

Are any other methods used for improving color?

Thanks,
Matthomas51

 

[Assumptions]

Presume that it is then disolved matter?

Do you wish to make it a light or a dark brown?

Would sugest that you have an analysis done on a sample first.

 

[aliansari]

Can you pass that water through 0.2 (or nearest) micron filter and note down the filteration time per litre alongwith the color of the filter paper after filteration ?

This brownish color could be due to presence of colliodal particle in water, otherwise not detectable by ordinary alanytical methods for Suspended Solids or Turbidity.

I may suggest you some remdial actions, once the nature of the impurity, generating color in water, is determined. Do you have any pre treatment system installed at your facility?

Regards.


Ansari

 

[nbucska]

What is the water used for? What is its origin ?



<nbucska@pcperipherals.com>

 

[RGCook]

A possible solution is to bleach the color out. Run some trials with sodium hypochlorite. If possible, use at pH 5-7 (slightly acidic). You don't seem to understand the nature of your water, hence the general reply.

Good luck.

 

[nbucska]

The origin may give a clue to the nature of contamination
the usage may tell us which means are acceptable for treatment.

<nbucska@pcperipherals.com>

 

[JoeDenny]

In case this is still an issue at this late date, your color may be due to tannins which can be removed simply and inexpensively via anion exchange.

 

[countryham]

I have been dealing with &quot;color&quot; issues for over thirty years and I can assure you that trying to &quot;scrub&quot; natural occuring colloidal color bodies in the form of tannins is very,very difficult, if not impossible.. The pulp and paper industry has worked to remove color bodies originating from &quot;black liquor&quot; formed from the digestion of wood pulp since forever...without significant results, of which I'm aware...Activated carbon followed by an oxidizing agent, like molecularly free chlorine has some effect under pH regulated conditions but change (re-adjust to alkaline ) the pH --and back comes the color......If you have any luck,--I would like to know about it,,,--pronto... countryham