{"product_id":"cddaemfad","title":"Anion-Exchange Membrane (Fumasep, FAD Series) for Diffusion Dialysis, CDDAEMFAD","description":"\u003cp\u003eThe Fumasep FAD series (produced by Fumatech BWT) is a specialized range of anion exchange membranes (AEMs) designed specifically for Diffusion Dialysis (DD). Unlike the FAA or FAAM series, which are optimized for carrying electrical current (electrolysis\/fuel cells), the FAD series is engineered to facilitate the passive diffusion of mineral acids while blocking metal cations. This makes them the industry standard for acid recovery from waste streams.\u003c\/p\u003e\n\u003cp\u003eThe FAD membranes are used to recover \"free\" acid from spent pickling or etching liquors in the metal finishing, semiconductor, and mining industries. In a diffusion dialysis stack, the waste acid solution flows on one side of the membrane and water flows on the other. Because of the concentration gradient, the acid (H+ and the anion) diffuses through the membrane into the water. he membrane’s fixed positive charges (quaternary ammonium) allow anions to pass easily. Protons (H+) can tunnel through as well. However, multi-charged metal cations (like Fe3+ or Ni2+) are strongly repelled by the membrane and stay in the waste stream. FAD membranes typically recover 80–90% of the free acid while rejecting 90–95% of the metal contaminants.\u003c\/p\u003e\n\u003ctable style=\"width: 100.036%; height: 192.637px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 40.2375px;\"\u003e\n\u003ctd style=\"width: 34.6997%; height: 40.2375px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%; height: 40.2375px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCDDAEMFAD55\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003e\u003cspan\u003eCDDAEMFADPET75\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.6997%;\"\u003e\u003cem\u003eMembrane Name\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%;\"\u003e\n\u003cp\u003e\u003cspan\u003eFAD-55\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003e\u003cspan\u003eFAD-PET-75\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 34.6997%; height: 35.6px;\"\u003e\u003cem\u003eThickness (um)\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e~55 μm (50–60 range)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003e\u003cspan\u003e~75 μm (70–80 range)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 34.6997%; height: 35.6px;\"\u003e\u003cem\u003eReinforcement\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eNone (Self-Supporting)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003e\u003cspan\u003eYes (PET Mesh)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.6997%;\"\u003e\u003cem\u003e Area Resistance (Cl-, Ω·cm²)\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%;\"\u003e\n\u003cp\u003e\u003cspan\u003e0.20–0.25\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003e\u003cspan\u003e0.20–0.25\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.6997%;\"\u003e\u003cem\u003eSpecific Conductivity (mS\/cm)\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%;\"\u003e\n\u003cp\u003e\u003cspan\u003e25-30\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003e\u003cspan\u003e15-25\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.6997%;\"\u003e\u003cem\u003eSelectivity\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u0026gt;85%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003e\u003cspan\u003e91-95%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.6997%;\"\u003e\u003cem\u003eTensile Strength (MPa)\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%;\"\u003e\n\u003cp\u003e24-26\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003e\u003cspan\u003e40-70\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.6997%;\"\u003e\u003cem\u003eProton Transfer Rate\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%;\"\u003e\n\u003cp\u003e8000 - 10000 µmol•min-1•cm-2\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003e\u003cspan\u003e2000 - 5000 µmol•min-1•cm-2\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 10px;\"\u003e\n\u003ctd style=\"width: 34.6997%; height: 10px;\"\u003e\u003cem\u003eIon Exchange Capacity (IEC)\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%; height: 10px;\"\u003e\n\u003cp\u003e~2.0-2.5 meq\/g (in Cl- form)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003e~2.0-2.3 meq\/g (in Cl- form)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.6997%;\"\u003e\u003cem\u003eApplication Cases\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%;\"\u003e\n\u003cp\u003eDiffusion dialysis for acid concentration and recovery\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003eElectrolysis stack for industrial-scale recovery unit with excellent mechanical stability\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.6997%;\"\u003e\u003cem\u003ePackage Grade\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 35.7785%;\"\u003e\n\u003cp\u003e\u003cspan\u003e10cm * 10cm\/pcs\/pack\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 28.9464%;\"\u003e\n\u003cp\u003e\u003cspan\u003e10cm * 10cm\/pcs\/pack\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUse Note\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cp\u003eTo ensure the longest possible life for these membranes, specific preparation is required:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHydration\u003c\/strong\u003e: These membranes are supplied dry. They must be soaked in water or a 1–3% HCl solution for at least 12–24 hours before assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvoid Drying Out\u003c\/strong\u003e: Once the membrane is hydrated, it must remain wet. If an FAD membrane dries out, it may develop micro-cracks that allow metal ions to \"leak\" into the recovered acid stream, ruining the purity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChemical Limits\u003c\/strong\u003e: While highly stable in acids, avoid exposing them to strong oxidizing agents (like chromic acid or concentrated nitric acid at high temperatures) unless specifically rated for those conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReferences\u003c\/strong\u003e:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/ceat.201700595\"\u003eZ. Palatý, et al., Permeability of a Fumasep-FAD Membrane for Selected Inorganic Acids, Chem. Engineering Tech., 2018, 41, 385-391\u003c\/a\u003e. \u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.mdpi.com\/2077-0375\/14\/1\/6\"\u003eHelena Bendová, et al., Comparison of Anion-Exchange Membranes for Diffusion Dialysis of Mixtures of Acids and Their Iron Salts, Membranes 2024, 14, 6\u003c\/a\u003e.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"Transport%20limitations%20in%20ion%20exchange%20membranes%20at%20low%20salt%20concentrations\"\u003eP. Długołęcki, et al., Transport limitations in ion exchange membranes at low salt concentrations, 2010, 346, 163-171\u003c\/a\u003e. \u003c\/li\u003e\n\u003c\/ol\u003e","brand":"FuelCellStore","offers":[{"title":"FAB-PK-75","offer_id":47377136419046,"sku":"CDDAEMFAD55","price":59.0,"currency_code":"USD","in_stock":true},{"title":"FAB-PK-130","offer_id":47377136451814,"sku":"CDDAEMFADPET75","price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CDDAEMFAD_main.png?v=1771815325","url":"https:\/\/echemsupplies.com\/products\/cddaemfad","provider":"EChem Supplies","version":"1.0","type":"link"}