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 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & 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 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & 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 - Scientific, technological and industrial services, research and design
Goods & 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 - Treatment of water, waste water, or sewage by neutralisationTreatment of water, waste water, or sewage pH adjustment
C02F 1/00 - Treatment of water, waste water, or sewage
C02F 101/22 - Chromium or chromium compounds, e.g. chromates
C02F 103/16 - Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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.
