Contamination of water sources, from perfluorooctane sulfonic acid (PFOS), remains a growing concern from a biological and ecological perspective. Currently, they are considered an emerging pollutant that is linked to a myriad of adverse health effects such as cancers and gastrointestinal diseases in mammals. Its presence in water is ubiquitous worldwide and is assumed to be present within the blood serum of over 99% of the U.S. general population. With its continued disposal and exposure in drinking waters, PFOS risk to mammalian health will likely increase. Current treatment methods to the remediation of PFOS have shown some success in its removal from water. However, the methods of destruction for this particular recalcitrant organic have proven to be either difficult or highly energy intensive. This study investigates a low energy/cost alternative treatment technology, known as the Arvia process, in its ability to successfully remove and destroy PFOS from water.
The Arvia process, provided by the company Arvia Technology Ltd, is a unique process that combines the properties of two existing water treatment mechanisms (adsorption and electrochemical oxidation) to remediate recalcitrant materials. The use of their patented granular intercalated compound, Nyex®, allows for physical adsorption of contaminants whilst also behaving as an electrode to destroy the species on its surface. The use of an Arvia sequential batch reactor and a continuous flow reactor were applied to the remediation of PFOS in water.
Sanjay Lad is an MRes student in the Faculty of Science and Engineering, supervised by David Ward.