Limited Effectiveness of Carbonaceous Sorbents in Sequestering Aged Organic Contaminants in Sediments.

ABSTRACT: Carbonaceous materials are often proposed for use in restoring soils or sediments contaminated with hydrophobic organic contaminants (HOCs). However, the contamination of most sites is a result of historical events, where HOCs have resided in the solid compartment for many years or decades. The prolonged contact time, or aging, leads to reduced contaminant availability and likely diminished effectiveness of using sorbents. In this study, three different carbonaceous sorbents, i.e., biochars, powdered activated carbon, and granular activated carbon, were amended to a Superfund site marine sediment contaminated with DDT residues from decades ago. The amended sediments were incubated in seawater for up to 1 year, and the freely dissolved concentration (C_free) and the biota-s

SUBMITTER: Taylor AR 

PROVIDER: S-EPMC10308819 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature