Municipal water treatment
Removal of Per- and Polyfluoroalkyl Substances (PFAS)
The current focus is on the worldwide contamination of water with a large number of per- and polyfluoroalkyl sub stances (PFAS), such as from firefighting foams, textile and paper impregnations, or lubricants. These harmful com pounds accumulate in the bodies of living beings. Their longevity makes it necessary to remove even traces from wastewater and to remediate contaminated groundwater. Compliance with these limit values is particularly success ful with our anion exchange resin Lewatit® TP 108 DW. The selective resin reliably binds even traces of PFAS down to the ppt range. For this reason, and due to its greater op erating capacity – even in the presence of chlorides and sulfates – the process is clearly superior to conventional filtration using activated carbon. The service life is up to five-times longer than that of activated carbon filters.
Drinking water supply, wastewater treatment, and waste dis posal are among the most critical municipal services. Strict demands are imposed on the purity of drinking water as our most important nutrient. Only responsible treatment prac tices make it possible to maintain a continuous cycle for turn ing wastewater back into water suitable for people, animals, agriculture, and industry. Waste products and other potential pollutants must be stored and disposed of in such a way that they cannot get into the water cycle. However, the latter is not always guaranteed unfortunately, making complex treatment operations necessary.
In the treatment of drinking water and wastewater, ion ex change resins benefit from their unique ability to selectively bind ions. Thus special grades of Lewatit® ion exchange resins can be used to remove harmful constituents such as iron or manganese from drinking water, as well as traces of pollutants such as arsenic and lead. Even groundwater can be treated efficiently in this way, in which detrimental con stituents such as chromate, nitrate, per- and polyfluoroalkyl substances (PFAS), surfactants, and perchlorate are bound to ion exchangers. Ionic and nonionic contaminants, which could otherwise disrupt operations in biological water treat ment plants or endanger the environment, can be removed from wastewater just as efficiently.
In addition to ion exchangers, we offer inorganic adsorbers that can be used in municipal drinking water and wastewater treatment. The Bayoxide® inorganic adsorbers range com prises technical iron oxide adsorbers in granular form. The product variants are based on defined crystalline α-ferric oxide hydroxide structures and are particularly suitable for removing arsenic and phosphate from drinking water or wastewater, but can also remove other metal ions and oxy anions. Bayoxide® products are used in a continuous fixed bed process in which the contaminated water is selectively purified. As a result, this technology can be integrated in existing facilities simply and economically.
Chelating Resins
| Product | Product Matrix | Ionic Form | Bead Size (mm): Monodisperse: (MD, mean value) Heterodisperse: (HD, share > 90%) | Total Capacity (eq/l) min. | Volume Change (%) max. | Water Retention (%) | Applications |
|---|---|---|---|---|---|---|---|
| Lewatit® MDS TP 220 | Styrene/DVB macroporous | H2SO4 salt | MD: 0.38 (+/– 0.04) | 36 g/l Cu capacity | –30 (del.→ free base) | 50–58 | Chromium(III) bath purification |
| Lewatit® MonoPlus TP 207 | Styrene/DVB macroporous | Na+ | MD: 0.61 (+/– 0.05) | 2.0 | –25 (Na+→H+) | 55–60 | Heavy metal removal from ef fluents |
| Lewatit® MonoPlus TP 214 | Styrene/DVB macroporous | H+ | MD: 0.55 (+/– 0.05) | 110 g/l Ag capacity | – | 54–60 | Mercury removal, precious metal recovery |
| Lewatit® MonoPlus TP 220 | Styrene/DVB macroporous | H2SO4 salt | MD: 0.62 (+/– 0.05) | 29 g/l Cu capacity | –23 (del.→ free base) | 50–55 | Chromium(III) bath purification |
Strong Acidic Cation Exchange Resins
| Product | Product Matrix | Ionic Form | Bead Size (mm): Monodisperse: (MD, mean value) Heterodisperse: (HD, share > 90%) | Total Capacity (eq/l) min. | Volume Change (%) max. | Water Retention (%) | Applications |
|---|---|---|---|---|---|---|---|
| Lewatit® K 2629 | Styrene/DVB macroporous | H+ | HD: 0.4–1.25 | 1.6 | – | 50–55 | Heavy metal removal from chromium(VI) baths, phosphoric/ sulfuric acid purification |
| Lewatit® MonoPlus SP 112 H | Styrene/DVB macroporous | H+ | MD: 0.67 (+/– 0.05) | 1.6 | –8 (H+→Na+) | 56–60 | Heavy metal removal from chromium(VI) baths, phosphoric/ sulfuric acid purification |
Strong Base Anion Exchange Resins
| Product | Product Matrix | Ionic Form | Bead Size (mm): Monodisperse: (MD, mean value) Heterodisperse: (HD, share > 90%) | Total Capacity (eq/l) min. | Volume Change (%) max. | Water Retention (%) | Applications |
|---|---|---|---|---|---|---|---|
| Lewatit® A 8071 | Acrylic, gel | Cl | HD: 0.4–1.6 | 1.35 | 25 (Cl→OH) | 48–55 | Acid retardation |
| Lewatit® DW 630 | Styrene/DVB macroporous | SO 2 4 | MD: 0.62 (+/– 0.05) | 1.1 | 16 (during exhaustion) | 58–63 | Uranium removal |
| Lewatit® K 6362 | Styrene/DVB gel | Cl | MD: 0.62 (+/– 0.05) | 1.3 | 22 (Cl→OH-) | 48–55 | Removal of heavy metals from hydrochloric acid, acid retardation, PFT removal |
| Lewatit® MDS TP 108 | Styrene/DVB gel | Cl | MD: 0.37 (+/– 0.05) | 0.8 | – | – | PFAS removal |
| Lewatit® S 5128 | Polyacrylate gel | Cl | HD: 0.50–0.75 (effective size) | 1.35 | 25 (Cl→OH) | 48–55 | Natural organic matter removal |
| Lewatit® S 6368 A | Styrene/DVB macroporous | Cl | MD: 0.62 (+/– 0.05) | 1.0 | 22 (Cl→OH) | 60–65 | Chromate and color removal from effluents, vanadium and molybdenum removal |
| Lewatit® TP 106 | Styrene/DVB gel | Cl | HD: 0.40–0.55 (effective) | 0.7 | – | 33–43 | Perchlorate and nitrate removal |
| Lewatit® TP 107 | Polyacrylate macroporous | Cl | HD: 0.45–0.65 (effective) | 2.4 | – | 30–42 | Chromate and sulfate removal |
| Lewatit® TP 108 | Styrene/DVB gel | Cl | HD: 0.38–0.48 (effective) | 0.7 | – | 33–43 | PFAS removal |
| Lewatit® TP 108 DW | Styrene/DVB gel | Cl | HD: 0.46–0.61 (effective) | 0.7 | – | 33–43 | PFAS removal |
| Lewatit®MonoPlus TP 109 | Styrene/DVB macroporous | Cl | MD: 0.62 (+/– 0.05) | 0.6 | – | 59–64 | PFAS removal, regeneration |
Weak Base Anion Exchange Resins
| Product | Product Matrix | Ionic Form | Bead Size (mm): Monodisperse: (MD, mean value) Heterodisperse: (HD, share > 90%) | Total Capacity (eq/l) min. | Volume Change (%) max. | Water Retention (%) | Applications |
|---|---|---|---|---|---|---|---|
| Lewatit® A 365 | Polyacrylate macroporous | FB | HD: 0.4–1.6 | 3.4 | 25 (FB→Cl) | 43–54 | Sulfate removal |
| Lewatit® MP 62 WS | Styrene/DVB macroporous | FB | HD: 0.4–1.25 | 1.7 | 45 (FB→Cl) | 50–55 | PFAS removal, vanadium and molybdenum removal, precious metal recovery from hydrochloric acid |
| Lewatit® MP 62 WS Eco | Styrene/DVB macroporous | FB | HD: 0.4–1.25 | 1.7 | 45 (FB→Cl) | 50–55 | PFAS removal, vanadium and molybdenum removal, precious metal recovery from hydrochloric acid |
| Lewatit® MonoPlus MP 68 | Styrene/DVB macroporous | FB/Cl | MD: 0.55 (+/– 0.05) | 1.3 | 24 (del. form →Cl) | 54–60 | Chromate removal from effluents |
Adsorbers & Solvent-impregnated Resins
| Product | Product Matrix | Ionic Form | Bead Size (mm): Monodisperse: (MD, mean value) Heterodisperse: (HD, share > 90%) | Total Capacity (eq/l) min. | Volume Change (%) max. | Water Retention (%) | Applications |
|---|---|---|---|---|---|---|---|
| Lewatit® AF 5 | Carbon microporous | – | HD: 0.4–0.8 | – | – | – | Organics removal from effluents |
| Lewatit® VP OC 1026 | Styrene/DVB macroporous | H+ | HD: 0.3–1.6 | 13 g/l Zn capacity | – | 28–33 | Chromium(III) bath purification |
| Lewatit® VP OC 1064 MD PH | Styrene/DVB macroporous | – | MD: 0.49 (+/– 0.05) | – | – | 54–63 | Organics removal from effluents |
| Bayoxide® E IN 20 | FeO(OH) | – | 0.315–2.0 | – | 0 (during exhaustion) | 20 | Arsenic/phosphate removal |
| Bayoxide® E IN 30 | FeO(OH) | – | 0.315–2.0 | – | 0 (during exhaustion) | 20 | Arsenic/phosphate removal |
| Bayoxide® E 33* | α – FeOOH | – | 0.315–2.0 | – | 0 (during exhaustion) | 20 | Arsenic/phosphate removal |
| Bayoxide® E 33 HC* | α – FeOOH | – | 0.315–2.0 | – | 0 (during exhaustion) | 20 | Arsenic/phosphate removal |
| Bayoxide® E 216* | α – FeOOH | – | < 0.5 | – | 0 (during exhaustion) | – | Arsenic/phosphate removal |
* In case resin is used for potable water treatment a special start-up procedure has to be applied, which is available upon request. Country-specific potable water approval certificates can be received as a manufacturer’s declaration.
Check out full information in Brochure Lewatit Product Guide 2025
