Skip Navigation
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Your Environment. Your Health.

June 2019 Superfund Research Program Science Digest

Superfund Research Program Science Digest
Balancing Scientific Excellence with Research Relevance

Technology Profile

CycloPure technology

CycloPure’s technology involves cup-shaped structures of cyclodextrin that allow binding and removal of a variety of pollutants.
(Photo courtesy of CycloPure, Inc.)

SRP-funded small business CycloPure, Inc., has developed a new product, DEXSORB+, which works to rapidly remove per- and polyfluoroalkyl substances (PFAS) from contaminated water supplies. CycloPure recently announced that in addition to SRP funding, they have raised an additional $3.5 million to accelerate the commercialization of their DEXSORB products. This will help them to make the technology available to consumers and municipal drinking water plants impacted by PFAS and other contaminants.

Technology The company's line of DEXSORB adsorbents are based on innovative technology that converts renewable cyclodextrins, derived from corn starch, into highly-adsorbent materials capable of eliminating a variety of pollutants from drinking water.
Innovation In their new DEXSORB+ product, they created a process that enhances the binding ability and found that it resulted in a seven-fold improvement in the removal of 20 short and long chain PFAS. For example, according to the company, DEXORB+ can remove more than 95 percent of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) even at low concentrations in only 30 minutes.
Contaminant and Media PFAS in drinking water
Principal Investigator Gokhan Barin, Ph.D.
Institution CycloPure, Inc. 
Grant Number R43ES029401