Decreasing Fluoride in Water Wells with Resins

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In the  region of São Paulo I have several clients with the problem of high fluoride ( 3 to 5 ppm) while the Brazilian legislation allows the maximum of 1.5 ppm.

The water comes from deep wells between 150 and 300 meters.

In one of them, I am testing a solution implanted with anionic resin ( 1100 l) activated with NaCl. However, the removal cycle is very low - 3 hours for approximately 30 cubic meters of water.

Does anyone know the reason for such a low cycle? Is there any way to improve it? I know other anions have a preference and I believe this is one of the problems.

For 70 m³ a day, what would be the most appropriate recommendation for 70 m³ a day? Is there a way to transform this "resin vessel" into another product of better efficiency?

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7 Answers

  1. U can try cationic resins.

    Apart from ion exchange,there r adsorption techniques.Use of activated Alumina,carbon,bonechar,coir pith,fly ash etc reported.

    Moringa oleifera seeds effectively used.

    Precipitation techniques like Nalgonda is well known,combo of lime and alum etc.

    CSIR-CMERI,Durgapur,West Bengal,India has patented an adsorption process.Also designs for household deflouridation available,economically effective.

    Others include electrochemical and RO techniques.

  2. Please get in touch with Purolite near you, the world renowned resin people. They can give you the best solution. Just yesterday i attended a technical prsentation done by their counry head of India and heard that fluoride can be handled by their resins.

    Regards

    Prosper

     

  4. Boa Tarde Reinaldo tudo bem?

     

    Resido em Natal-RN (Brasil), e tenho desenvolvido e pesquisado nessa área de adsorção ou remoção de íons de efluentes e águas desde 1997, ou seja a mais de 2 décadas, Segue o link do meu canal no youtube: https://www.​youtube.com/​user/carloscatunda.

    Caso queira conversar sobre futuras consultorias  e parcerias, estou a sua disposição.

    Atenciosamente.

     

    Prof. Dr. Carlos Catunda

    Professor da UERN; www.uern.br

    Link do meu curriculum vitae Lattes/CNPq: http://lattes.cnpq.br/3656300896047696

     

  6. Ways to Remove Fluoride from Water

    • Reverse Osmosis Filtration - This is used to purify several types of bottled water (not all), so some bottled waters are unfluoridated. Reverse osmosis systems are generally unaffordable for personal use.
       
    • Activated Alumina Defluoridation Filter - These filters are used in locales where fluorosis is prevalent. They are relatively expensive (lowest price I saw was $30/filter) and require frequent replacement, but do offer an option for home water filtration.
       
    • Distillation Filtration - There are commercially available distillation filters that can be purchased to remove fluoride from water.

    https://thewaternetwork.com/question-0-y/how-to-remove-fluoride-from-groundwater-sS2iW-WU5v0Nr8dQkl_PXg

     

     

  7. Go for Activated Alumina

    1 Comment

    1. Activated Alumina for fluorine removal purpose is very extended, but the new technology HINDROP (www.hindrop.com)  has a higher efficiency, works on any kind of water and doesn't lixiviate aluminiun and sulfates, which are more dangerous than fluorine removed.  HINDROP will desplace activated alumina solutions in the immediate future due to their better properties