Organics Removal from Water

Natural Organics and Total Organic Carbon (TOC)  from Potable Water

Organics in surface water usually refers to humic and fulvic acids that are the natural decay products of plants and such. In this case the best approach is DOWEX™ MARATHON™ 11  resin. It is an uniform particle size, porous gel, strong base anion exchange resin specifically designed for demineralization of high organic water and as an organic scavenger. The new uniform particle size DOWEX MARATHON 11 resin consistently offers 90-95% removal of naturally occurring organic material when new, and 80-85% removal after extended service.

Dow has also developed a new, very wide pore resin designed to remove very large molecules like tannins, designated DOWEX TAN-1.

For anyone who has attempted to remove organic materials from water using carbon, the use of DOWEX OPTIPORE™ polymeric adsorbents will bring a welcome surprise. Dow's synthetic, polymeric adsorbents are engineered for regeneration under milder conditions making on-site regeneration possible and allowing the organic solvent to be returned to the process eliminating waste and cost. This is a welcome solution to the traditional, hard to regenerate, means of removing organics.

Non-Strippable Organics Such as Phenol

Phenol is a common contaminant of waste water due to its high solubility in water. DOWEX OPTIPORE adsorbents can be used to remove phenol from water (36KB PDF) then regenerated on site. DOWEX OPTIPORE adsorbents can be regenerated with steam or caustic.

Organic acids can be removed from water with DOWEX M-43 resin, an easily regenerable, general purpose acid absorber.

Many solvents, hydrocarbons and chlorinated solvents can be removed from water by air stripping.  For more information see the VOC Control page.

Applications

DOWEX Resins

Product Description Type Matrix Total
Exchange
Capacity*
eq/l (kgr/ft3)		 Available
Forms
DOWEX MARATHON 11 A uniform particle size, porous gel, strong base anion exchange resin specifically designed for demineralization of high organic water and as an organic scavenger. Type I Strong Base Anion Styrene-DVB, Gel 1.3 (28.4) Cl-
DOWEX TAN-1 An open pore macroporous strong base anion exchange resin for organics removal from potable water and food applications. Type I Strong Base Anion Styrene-DVB, Macroporous 0.7 (15.3) Cl-
DOWEX M-43 Corrosion control with DOWEX M-43 ion exchange resin. Weak Base Anion Styrene-DVB, Macroporous 1.55 FB (Free Base) form
DOWEX OPTIPORE L493 A general purpose polymeric adsorbent for the concentration of a wide variety of chlorinated and organic solvents from water. Adsorbent Styrene-DVB, Macroporous
DOWEX OPTIPORE SD-2 Polymeric adsorbent used to decolorize HFCS, corn syrup, sucrose and fruit juices. Meets CFR 173.25. Adsorbent Styrene-DVB, Macroporous Hydrophic


 


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