Long-Term Stability and Efficacy of Historic Activated Carbon (AC) Deployments at Diverse Freshwater and Marine Remediation Sites
Abstract
A number of sites around the United States have used activated carbon (AC) amendments to remedy contaminated sediments. Variation in site-specific characteristics likely influences the long-term fate and efficacy of AC treatment. The long-term effectiveness of an AC amendment to sediment is largely unknown, as the field performance has not been monitored for more than three years. As a consequence, the focus of this re-search effort was to evaluate ACs long-term (610 yr) performance. These assessments were performed at two pilot-scale demonstration sites, Grasse River, Massena, New York and Canal Creek, Aberdeen Proving Ground (APG), Aberdeen, Maryland, representing two distinct physical environments. Sediment core samples were collected after 6 and 10 years of remedy implementation at APG and Grasse River, respectively. Core samples were collected and sectioned to determine the current vertical distribution and persistence of AC in the field. The concentration pro-file of polychlorinated biphenyls (PCBs) in sediment pore water with depth was measured using passive sampling. Sediment samples from the untreated and AC-treated zones were also assessed for bioaccumulation in benthic organisms. The data collected enabled comparison of AC distribution, PCB concentrations, and bioaccumulation measured over the short- and long-term (months to years).
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 2020
- Accession Number
- AD1134983
Entities
People
- Alan R Kennedy
- Charles A. Menzie
- David Moore
- Huan Xia
- Kibeum Kim
- Konrad Kulacki
- Sandra Newell
- Todd Bridges
- Trevor Needham
- Upal Ghosh
Organizations
- Engineer Research and Development Center
- Exponent
- University of Maryland, Baltimore County