How It Works

SediMite™ is a low-impact system for delivering treatment materials to sediment for in-situ remediation. It is an agglomerate comprised of a treatment agent (typically activated carbon), a weighting agent (to enable it to sink and resist resuspension), and an inert binder. Activated carbon delivered through SediMite™ can be used to bind up pollutants and reduce uptake in the aquatic food chain.  Activated carbons have been demonstrated to have strong affinities for bioaccumulative pollutants commonly found in contaminated sediment sites such as PCBs, mercury, methylmercury, dioxins, furans, and PAHs.

The use of SediMite™ limits the impacts and difficulties with conventional in-situ treatment methods and can provide an alternative to dredging and capping. Use of SediMite™ also limits ecological impacts and natural resource damages that could occur when aggressive removal or capping methods are employed. Because SediMite™ is designed to cause minimal environmental impact it can be used in areas where a primary goal is to limit destruction of the existing habitat.

Shown to the right is a fluorescence image of SediMite™ (containing fluorescent tracers) delivered to an experimental marine mesocosm. The picture illustrates the process of SediMite™ breakdown and incorporation into the surficial sediments through

Sedimite PelletsSediMite™ pellets shown on the left can be manufactured with different shapes and material properties to target specific field applications. In the commonly used form, the product is designed to withstand dispersal through the water column with minimal release of active ingredients followed by slow disintegration and mixing into the bioactive zone of sediments through natural sediment mixing processes such as bioturbation.