“Awareness is key. In the absence of information, none of us know what is happening and what could be jeopardizing our health, our water supply, and our planet.” – Erin Brockovich

Overview

Hexavalent chromium (Cr⁶⁺) is a highly soluble and mobile form of chromium commonly found in groundwater and drinking water systems. It can occur naturally from mineral dissolution, but is more often associated with industrial sources such as chrome plating, stainless steel production, and improper waste disposal.

Pureflow Treatment Technologies

Reduction – Coagulation Filtration

Pureflow’s reduction/filtration process removes hexavalent chromium (Cr⁶⁺) by first chemically reducing it to trivalent chromium (Cr³⁺) using a reducing agent (typically ferrous iron). The reduced chromium then forms a co-precipitate with iron, creating a filterable floc. This floc is captured in a multi-media filtration system, which is periodically backwashed to remove the accumulated solids.

Ion Exchange

Hexavalent chromium removal by ion exchange uses a strong-base anion resin to selectively capture dissolved chromate ions (Cr⁶⁺) from water. As the water passes through the resin bed, Cr⁶⁺ is exchanged for chloride or other ions, effectively removing it from solution. The resin is periodically regenerated using a brine solution or replaced, depending on system design and operating strategy