Microfilter for Nanoparticles Filtering

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Is there any microfilter capable of filtering Aluminium, Strontium and Barium from drinking water?

Can any microfilters be used to purify aquifers water as well? How to purify extremely high values of above three from water? 

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27 Answers

  1. You will need a process to oxidize and flocculate these particles. 

    Separation can then be through a membrane system. A scale will form on the membrane which will need to be managed through chemical cleaning.

    Another alternative, although not tested for strontium and barium, could be using hydrodynamic cavitation combined with Activated Filter Media. The hydrodynamic cavitation through a static mixer will raise the oxidation potential of the water and help with flocculation. The activated filter media uses electrostatic attraction instead of the conventional physical attachment in the case of sand and zeolitic materials. Removal efficiencies are typically between 1 to 5 micron with 99% efficiency. 

    My company is experienced with this process and have successfully removed iron, manganese, aluminium, arsenic, chromium from water. If you are able to send a water sample, we can both work collaboratively to provide a solution.

    Please email me at andrew@waterandoilsolutions.com.au

  3. Yes they are nano particulates.

    IE They are from aerosol dispersment .IE aerial spraying.

    Regards Tony

    1 Comment

    1. So OK it could be achieved by MF/UF and we could do something for you on this with our microfiltration system. Feel free to contact me if you want to pursues. I'll make a contact request on this platform.

  4. tony searles are they actual nanoparticles or are this metal present in the aquifer your tapping in if they are in ion form Al3+ , Ba2+ and Sr2+ then you cant re move them directly by microfiltration. It either will require nanofiltration or a chemical treatment as prescribed by other posts. we treated in the past Ca++ Sr++ and Ba++ by lime softening followed by MF and polishing stage electrocoagulation and a second MF stage the starting concentration were extremely high. Depending on volume and concentration you could also look at ion exchange. if you want a further chat don't hesitate to contact me.

  5. Hi Tony

    Those metals are in form of nanoparticles they could be filtered by MF. (if they cant be treated chemically either by pH Correction or coagulation or oxidation. If you are talking about nanoparticles or small particles, I would assume that they are oxides or carbonates or may be sulphite or sulphate... Anyhow for MF/UF  the first point is to know the particle size distribution to ensure what pore size range to choose from. (The worst case scenario would be to have a membrane pore size distribution matching the particle size distribution. for nanoparticles depending on concentration/volume to treated I would look into hollow fibres or ceramics, But more information are required in terms of pH free chlorine concentration and desired concentration ratio to achieve volume/flow rate othe contaminants...

    Last year we worked on a MF project looking at removing Ba Sr Al Ca oxide/hydroxide by MF when we got the data it worked very well. We could look in doing some trials if you need to investigate this further. Please feel free to contact me direct.

    Gerald

  7. I would suggest ozonisation it will oxidise it to higher state and thus makes it easily filterable..Ozonation with our nanobubble technology which helps in more than 90 percent dissolution in water thus making it extremely cost effective and very low capacity requirement of ozone equipment...making it very cost effective and very low or negligible OPEX costs...no addition of chemicals chemicals and if at all RO used it is equally beneficial for RO memberanes too...

    1 Comment

  8. First always consider chmical setteling before using membranes by increasing pH, if it is for drinking water use RO afterwards.

  9. Membrane process like micro and ultra filtration and pressure driven processes are becoming popular.

    Nanomaterial adsorbents are effective in removing nanometal from water

    Combination of CNTs,zeolites and dendrimers are reported .

    CNT composites with iron oxides are cheaper.

    Polymer grafted iron oxides nanocomposites are very effective for removing multivalent metal ions  nanoparticles.

    Dendritic polymers as ligands for inorganic anions

  12. The removal of multi-valent ions by membranes (nonofiltration) removes Ca++ too and therefore reduces the quality of the potable water. After nanofiltration or RO, some remineralization is recemmended to restore the fresh water quality. What about substances which are not dissociated in ions like boron ?

  13. reverse osmosis is the best but before reverse osmosis process treat your water in MBR or ultrafiltration or any Nano filteration and then feed it to reverse osmosis whats is the TDS in water

  15. There is a Nano filtration membrane available that allows the single valent ions to pass through. In this case, you can remove the multivalent ions from the water and allow single valent ions such as Na, Cl etc. existed. This membrane has been used to separate or purify the salts.  

  17. I uses Magnesium Oxide (MgO) prill beads to purify drinking water PERMANENTLY! The prill beads come from a deep mine in Nevada. They are processed at 700 degrees which turns them into ceramic beads that do not dissolve in water. The beads place a positive charge in the water that shatters the magnetic bond that holds together any contaminants or pollutants (chlorine, fluoride, heavy metals: zinc, copper, lead, chromium-VI, strontium, aluminum, barium, pesticides, radiation, pharmaceuticals, mold, Ecoli, bacterias, etc) and gasses them out of the water. It raises the water pH to 8.7, high alkalinity, high oxygen, and thins the water so that can penetrate the cell membranes and flush out your toxins. As to hydration: 3 glasses of prill water is equal to drinking 1 gallon of reverse osmosis water. Great for acid conditions: acid-reflux, heartburn and acne. Great for ice cubes. Google "prill water uses". Please tell others about us cuz that is how we grow. Regards,  Richard Fishman Owner www.PrillyPureWater.net 808-879-0007

  18. A standard cation resin in the sodium form will also take these out ( a water softener) as will electrocoagulation and electrodeionization. 

  20. Mansoor had a good point. If they are in compound these toxins can not be filtered out. Microbial intervention is required. To reduce all known and unknown toxic substances use the Archaea which will chelate all loose electrons from their elemental form.  When these items are in their non toxic nutritional form there is no need for any filtering system. You now have mineral water that has been super oxygenated.  Drink, crop irrigation, put in river to ocean. I am sure Ocean (dead zones) would appreciate free oxygen and eliminate all dead zones everywhere.

    1 Comment

  21. Use caution with RO and Nano as these targets may precipitate and foul.  Modeling will provide indications of precipitation and other recovery/rejection issues.  Pretreatment will be critical.

  22. Joseph is right. What are the levels of these elements in your raw water and what else do you have to eliminate?

  23. Reverse Osmosis Membranes(RO) Modified with Ag2O Nanoparticles to Improve Performance for Nan particles filteration n orm of compound.

     The process used m -phenylenediamine and trimesoyl chloride in hexane, incorporating silver oxide Ag2O nanoparticles of varied concentrations from 0.001 to 0.1 wt%. Ag2O nanoparticles were prepared at different sizes varying between 20 and 50 nm. The modified membranes characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), transmission electron microscopy (TEM), and contact angle measurement.