Order early for pre-holiday delivery. Flinn will be closed December 24th, 2025,
through January 4th, 2026, reopening Monday, January 5th, 2026.
Orders received after 10:30 AM Central Time on Tuesday, December 23rd, 2025,
will ship after we return.
Since 1980, scientists and engineers have developed innovative methods to remove contaminants from soil, surface water and groundwater, including permeable reactive barriers (PRBs). With the Cleaning Up with Iron: Redox Reactions and Groundwater Remediation—ChemTopic™ Lab Activity, demonstrate how these permeable walls allow water to flow through, but their reactive materials, such as metallic iron, trap or detoxify pollutants like chlorinated organic solvents and heavy metals. Available as part of the Chemistry in the Environment—ChemTopic™ Labs digital collection. Click the Price link for digital collection pricing.