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In Situ Treatment for Control of Hydrophobic Organic Contaminants Using Sorbent Amendment: Theoretical Assessments

Lookup NU author(s): Professor David Werner, Professor Richard Luthy

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Abstract

Sediments accumulate hydrophobic organic compounds (HOCs) such as polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), and dichlorodiphenyltrichloroethane (DDT). Sediments thus act as reservoirs, exposing HOCs to benthic biota, releasing HOCs into porewater, and contributing HOCs to the aquatic food web. It has been observed that certain sediment particle types, known as black carbon (BC), have stronger sorption capacity than inorganic particles with coatings or inclusions of natural organic matter (Ghosh et al., 2003). Char, charcoal, soot, and their derivatives are such types with strong sorption capacity. Once the HOCs are sorbed into the BCs, they become much less available than HOCs sorbed on other mineral-based particles (Ghosh et al., 2000, 2003). These findings motivated studies of a novel in situ sediment treatment strategy using carbonaceous strong sorbents such as activated carbon (AC) to sequester HOCs. Activated carbon has been selected for most studies due to its high affinity for HOCs. By incorporating AC into HOC-contaminated sediment, HOCs would be redistributed, sorbed onto AC particles, and become less available to porewater and biota.


Publication metadata

Author(s): Cho YM, Werner D, Janssen EML, Luthy RG

Editor(s): Reible, DD

Publication type: Book Chapter

Publication status: Published

Book Title: Processes, Assessment and Remediation of Contaminated Sediments

Year: 2014

Volume: 6

Pages: 305-323

Online publication date: 25/04/2013

Publisher: Springer

Place Published: New York, USA

URL: http://dx.doi.org/10.1007/978-1-4614-6726-7_11

DOI: 10.1007/978-1-4614-6726-7_11

Library holdings: Search Newcastle University Library for this item

ISBN: 9781461467250


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