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Friday, March 20, 2009

Arsenic and Flouride removal from potable water

Saleem,

Thank you for responding. I am seeking out low cost fluoride removal as well but have yet to come up with something satisfactory. In my case I am looking for P.O.S.(point of entry) or an in-line filtration system of which R.O. is not desirable for cost and other reasons mentioned below. I am looking to filter my bathing water hence the reason for temperature related questions.

I have heard and read that red clay is being used to remove fluoride which may be a low-cost alternative to alumina, charcoal and reverse osmosis. You may already be aware of these trial technologies...
http://209.85.173.132/search?q=cache:FPOVywA1ccAJ:www.thinkcycle.org/tc-filesystem/download/development_by_design_2002/publication:_terafil_water_filter_for_sustainable_drinking_water_programme/Terafil%2520Water%2520Filter-final%2520paper.doc+red+clay+removes+fluoride&cd=7&hl=en&ct=clnk&gl=us

http://wedc.lboro.ac.uk/conferences/pdfs/20/Padmasir.pdf (sorry, i don't know why the pictures and illustrations are not shown)

Reverse osmosis does indeed remove fluoride and arsenic but I have come to learn that it is not an idyllic solution. R.O. removes all minerals good or bad indiscriminately and reverses the molecular spin of the molecule creating what is called "aggressive" water. While it will not poison you with a contaminant, true, when consumed for longer than 6 months this water will create mineral deficiency leading to sickness and decreased/suppressed cognitive ability and immune system function. When water is forced through the R.O. membrane the smaller lighter molecules tend to get caught behind the membrane and only the larger heavier molecules get forced through. But from a biological stand point it is the smaller lighter molecules that are of the most health benefit to the body. Additionally the plastic membranes used in R.O. systems are made from a type of plastic that leaches toxins into the water. This is why a post filter of carbon or carbon/kdf is always used.

I deeply sympathize with India and many other country's plight to remove fluoride and other contaminants from the water. How ironic that here in the U.S. fluoride and arsenic are being ADDED to our water at a cost to tax payers and a profit for nuclear, coal and phosphate fertilizer industries.

Best of luck to you,
Mary
USA
On Tue, Mar 17, 2009 at 11:55 PM, saleem asraf syed imdaadullah <saleemasraf@gmail.com> wrote:
Dear Madam,
Fluoride removal by activated alumina is beig done on a wide scale across India, But no follow up study is done to find out the result by any agencies in India. So, adsorption in temperatures much higher than 80 degrees F is to be eshtablished yet. Fluoride and Arsenic removal are two very typical problems I have faced personally. Both can be fully removed by Reverse Osmosis , but because of prohibitive installation cost no body is going for it. And using chemicals and resins are not foolproof. If you have some other suggestions, we can apply them.

 Auro aqua safe sachet

............
INREM foundation
please watch these.


and read this please

http://www.inrem.in/fluorosis/solutions.html
basic cost of aa is Rs 200 to 300 per filters. plus activated charcoal Rs 25 to removal traces of aa which is harmful, rest buckets say around rs 200, and other material together , basic making cost wld be around rs 600 to rs 800...sunder