Lookup NU author(s): Professor David Werner
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Activated carbon (AC) amendment is a recently developed sediment remediation method. The strong hydrophobic organic contaminant sorption efficiency of AC has been shown in several studies, but effects on benthic organisms require more investigation. The AC induced effects on egestion rate, growth and reproduction of Lumbriculus variegatus were studied by applying bituminous coal based AC in three different particle size fractions, namely <63 mu m (90%, AC(p)), 63-200 mu m (AC(p)) and 1000 mu m (AC(g)), to natural uncontaminated (HS) and artificial sediment (AS). Egestion rate, growth and reproduction decreased with increasing AC concentration and finer AC particle fractions, effects being stronger on HS than on AS sediment. Lipid content in AS was reduced already at the lowest AC doses applied (AC(p) and AC(m) 0.05%, AC(g) 0.25%). In addition, hormesis-like response was observed in growth (AS) and reproduction (AS, HS) indicating that AC may disturb organisms even at very low doses. Potential ecological effects need to be further evaluated in an amendment- and site-specific manner.
Author(s): Nybom I, Werner D, Leppanen MT, Siavalas G, Christanis K, Karapanagioti HK, Kukkonen JVK, Akkanen J
Publication type: Article
Publication status: Published
Journal: Environmental Science & Technology
Print publication date: 07/11/2012
ISSN (print): 0013-936X
ISSN (electronic): 1520-5851
Publisher: American Chemical Society
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