TY - JOUR
T1 - Development and placement of a sorbent-amended thin layer sediment cap in the Anacostia River
AU - McDonough, Kathleen M.
AU - Murphy, Paul
AU - Olsta, Jim
AU - Zhu, Yuewei
AU - Reible, Danny
AU - Lowry, Gregory V.
N1 - Funding Information:
This work was funded by the Hazardous Substance Research Center-SSW (R139634), the Cooperative Institute for Coastal and Estuarine Environmental Technology (CICEET), and by Alcoa, Inc. (Pittsburgh, PA). The authors also thank the reviewers for their insightful comments that significantly improved the quality of this manuscript.
PY - 2007/5
Y1 - 2007/5
N2 - Incorporating materials into sediment caps that can sequester contaminants will greatly improve their ability to isolate contaminants in the underlying sediments from the rest of the aquatic environment. For highly sorptive media a thin layer (cm) may be sufficient, but accurately placing a thin layer (cm) of material over submerged contaminated sediment is difficult. A reactive core mat (RCM) was designed to accurately place a 1.25 cm thick sorbent (coke) layer in an engineered sediment cap. In April 2004, twelve 3.1 m × 31 m sections of RCM were placed in the Anacostia River, Washington, D.C., and overlain with a 15 cm layer of sand to secure it and provide a habitat for benthic organisms to colonize without compromising the integrity of the cap. Placement of the RCM did not cause significant sediment re-suspension or impact site hydrology. The RCM is an inexpensive and effective method to accurately deliver thin layers of difficult to place, high value, sorptive media into sediment caps. The approach can also be used to place granular reactive media that can degrade or mineralize contaminants.
AB - Incorporating materials into sediment caps that can sequester contaminants will greatly improve their ability to isolate contaminants in the underlying sediments from the rest of the aquatic environment. For highly sorptive media a thin layer (cm) may be sufficient, but accurately placing a thin layer (cm) of material over submerged contaminated sediment is difficult. A reactive core mat (RCM) was designed to accurately place a 1.25 cm thick sorbent (coke) layer in an engineered sediment cap. In April 2004, twelve 3.1 m × 31 m sections of RCM were placed in the Anacostia River, Washington, D.C., and overlain with a 15 cm layer of sand to secure it and provide a habitat for benthic organisms to colonize without compromising the integrity of the cap. Placement of the RCM did not cause significant sediment re-suspension or impact site hydrology. The RCM is an inexpensive and effective method to accurately deliver thin layers of difficult to place, high value, sorptive media into sediment caps. The approach can also be used to place granular reactive media that can degrade or mineralize contaminants.
KW - Aquatic habitat restoration
KW - In-situ sediment management
KW - Innovative remediation technologies
KW - Remediation technologies
KW - Sediment capping
KW - Sediment remediation
UR - http://www.scopus.com/inward/record.url?scp=34147192074&partnerID=8YFLogxK
U2 - 10.1080/15320380701285725
DO - 10.1080/15320380701285725
M3 - Article
AN - SCOPUS:34147192074
VL - 16
SP - 313
EP - 322
JO - Soil and Sediment Contamination
JF - Soil and Sediment Contamination
SN - 1532-0383
IS - 3
ER -