The present disclosure relates to the use of a strongly basic anion exchange resin, in the form of dimethylethanolamine (DMAE) resin, for the removal of the per- and polyfluoroalkyl substances (PFASs) from fluids such as water.
01 - Produits chimiques destinés à l'industrie, aux sciences ainsi qu'à l'agriculture
Produits et services
Ion exchange resins, activated carbons and chemical
adsorbents for water treatment, water purification, water
filtration, process recovery, product purification, waste
treatment and catalysis.
Filters, filter cartridges and systems comprised of filters,
filter cartridges, filtration media, housings, pumps,
membranes, vessels and dispensing controls for water
treatment, water purification, water filtration, process
recovery, product purification, waste treatment, water
dispensing, laboratory water purification, dialysis water
purification, and catalysis.
Filters, filter cartridges and systems comprised of filters, filter cartridges, filtration media, housings, pumps, membranes, vessels and dispensing controls for water treatment, water purification, water filtration, process recovery, product purification, waste treatment, water dispensing, laboratory water purification, dialysis water purification, and catalysis
01 - Produits chimiques destinés à l'industrie, aux sciences ainsi qu'à l'agriculture
Produits et services
Ion exchange resins, activated carbons and chemical adsorbents for water treatment, water purification, water filtration, process recovery, product purification, waste treatment and catalysis
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Analysis of water quality; analysis of ion exchange capacity in water purification systems; providing ion exchange capacity projections for water purification systems
A method of removing chromium from water using a weak base anion exchange resin at a pH above about 5 includes the step of periodically reducing a flow of the water through the ion exchange resin for a rest period, such that a secondary mechanism of chromium removal predominates, wherein chromium ions are removed from the weak base anion exchange groups and precipitated inside the ion exchange resin. In an alternative embodiment, rather than resting, the ion exchange resin is periodically conditioned with an acid so as to enhance the secondary mechanism.
C02F 1/66 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par neutralisationAjustage du pH
C02F 1/00 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout
C02F 101/22 - Chrome ou composés du chrome, p. ex. chromates
C02F 103/16 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de procédés métallurgiques, c.-à-d. de la production, de la purification ou du traitement de métaux, p. ex. déchets de procédés électrolytiques
10.
METHOD FOR REMOVING CHROMIUM FROM WATER USING WEAK BASE ANION EXCHANGE RESIN AT NEAR-NEUTRAL PH
A method of removing chromium from water using a weak base anion exchange resin at a pH above about 5 includes the step of periodically reducing a flow of the water through the ion exchange resin for a rest period, such that a secondary mechanism of chromium removal predominates, wherein chromium ions are removed from the weak base anion exchange groups and precipitated inside the ion exchange resin. In an alternative embodiment, rather than resting, the ion exchange resin is periodically conditioned with an acid so as to enhance the secondary mechanism.
