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Current IssueDecember 20, 2014
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Ask The Expert: Pool water silverization
02/01/2004 
 
Question:

Q: I'm the director of a water treatment company based in India. Ours is a manufacturing company involved in water solutions. We are the First one in India to develop a water vending machine for Thermax Culligan. We are OEM suppliers to Coke and Pepsi for commercial UV purifiers for their dispencing machines. We are coming up with a point-of-use UV purifer in which we wish to incorporate silverization as an added feature. I would like to know whether introducing silver by electrolysis in water will help in disinfection? If yes, will it be effective like chlorine and ozone? Also, can I measure the effect? For instance, if I put in some ppm of silver, how long will the water remain disinfected? Are there any kits available to measure silver content in water? I'm sure your suggestions will be of great value you.

Nisha Ashutosh
Accord Watertech Pvt. Ltd.
Shivaji Nagar, India

 

Answer: 

A: Regarding the efficacy of ionic silver and water, although not as effective as ozone, we feel that it's as good as chlorine. By using electrolysis, you'll be putting ionic silver into the water, which will remain effective as long as it is present. There are test kits for silver and it's also possible to measure the microbial content of the water. Silver is commonly used in pool water treatment and impregnated into carbon for use in drinking water filtration because of its bacteriostatic properties. For a few more specifics to your question, see:

www.millennium-ark.net/News_Files/Water/Water_FAQs3.html

www.hopkins-heic.org/infectious_diseases/water_table.htm

www.iwaponline.com/wst/03105/wst031050123.htm

www.pubmedcentral.nih.gov/articlerender.fcgi?artid=201659

www.who.int/water_sanitation_health/dwq/en/admicrob4.pdf

https://mcanet.mcga.gov.uk/public/c4/mld/section05/M.1401.pdf

We hope that helps.

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