Ground water quality

Hi all

When treating the well water with chlorine (as potassium hypochlorate) the water color changes to green color.

What is the reason of this color, and how it can be treated?

Your help much appreciated.

Taxonomy

• Quality Maintenance
• Water Wells
• Water Quality Management
• Groundwater Assessment
• Groundwater Pollution
• Groundwater Quality & Quantity

7 Answers

1. Would be helpful if you could provide a detailed water analysis.

   The green colouration could be due to the oxidation of a metal.

   Likely suspects would be copper and/or chromium present in the water, but without a complete water analysis I would only be guessing.

2. sure sir, i will be more than happy if i could solve your problem because adding chlorine for purifying is not a good solution. M.Nageeb Rashed 

3. Dear Mr.Kumar

   Thank you for your response. i will contact you by email

   Regards

   RASHED

4. hi Sir,

    

   i am from kacen water pvt ltd. so please share your contact details or contact me,will share a perfect solution for purifying well,tap,lake,river and pond water .

   ashok kumar

   91-9312741407

   ashok.kumar@kacenwater.com

5. https://www.mrwa.com/WaterWorksMnl/Chapter%209%20Disinfection.pdf

   1 Comment

   1. Thanks Dr Rosholt for this chapter

6. Check the iron concentration in the well water. Probable oxidation of iron ions to ferric chloride by the hypochlorite. Also check the pH of the water. The pH would be more than 7 in that case. 

   3 Comments

   1. I agree with Muiruri and Daniel . Thanks

   2. I concur with Daniel Couton's opinion. Likely oxidation of a metal. Water analysis in this case is necessary. https://doi.org/10.1016/j.ica.2006.03.035

      1 Comment reply

      1. pH 7.3,( Fe 0.3 , Zn 0.48 mg /L). So, I believe that Fe and pH are not the case 

   3. Thanks Dr.Muiruri.  

      The Fe ion in the well water was low and I believe that it not oxidized as the pH about 6.8  

7. I would like to get these few information from you before I can advise you. 

   (1) Did you do the water analysis of the well to know the possible contaminants?

   (2) Before shock chlorinating the well, whats the quantity of bleach used?

   (3) Did you recycle the water in the well for about  15 to 20 minutes?

   (4) Did you allow it for 24 hrs before flushing?

    

   1 Comment

   1. There is a chance that the chlorination process ends up in total chlorine decay and a condition which conducive for an algae bloom..more chemical analysis of the water including breakpoint chlorination analysis is necessary.If the green is due to a condition that permits algae to bloom then use MPC buoys. The real answer lies in a thorough analysis of the raw water and its behaviour upon carefully staged disinfection. Basically the characteristics of the well water chemistry.