Amendments for the in situ remediation of contaminated sediments: evaluation of potential environmental impacts

The Science of the Total Environment
M H Paller, A S Knox

Abstract

Active sediment caps represent a comparatively new technology for remediating contaminated sediments. They are made by applying chemically active amendments that reduce contaminant mobility and bioavailability to the sediment surface. The objective of this study was to determine if active cap amendments including organoclay, apatite, and biopolymers have the potential to harm benthic organisms. Methods included laboratory bioassays of amendment toxicity and field evaluations of amendment impacts on organisms held in cages placed within pilot-scale active caps located in Steel Creek, a South Carolina (USA) stream. Test organisms included Hyalella azteca, Leptocheirus plumulosus, Lumbriculus variegatus, and Corbicula fluminea to represent a range of feeding modes, burrowing behaviors, and both fresh and saltwater organisms. In addition to the laboratory and field assays, chemical extractions were performed to determine if the amendments contained harmful impurities that could leach into the ambient environment. Laboratory bioassays indicated that 100% apatite had minimal effects on Hyalella in freshwater and up to 25% organoclay was nontoxic to Leptocheirus in brackish water. Field evaluations indicated that pilot-scale caps comp...Continue Reading

References

Oct 13, 2001·Environmental Toxicology and Chemistry·W Fan, W X Wang
Feb 26, 2004·Environmental Toxicology and Chemistry·Lieven BervoetsRonny Blust
Sep 10, 2005·The Science of the Total Environment·A S KnoxM H Paller
Jan 24, 2008·The Journal of Analytical Psychology·Jean Knox

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Citations

Sep 1, 2014·Environment International·Chang ZhangLiang Hu
Jan 15, 2016·Environmental Science and Pollution Research International·Chang ZhangLiu-Qing Shen
Aug 16, 2011·Ecotoxicology and Environmental Safety·Gunther RosenYolanda Meriah Arias-Thode
Jul 26, 2011·Ecotoxicology and Environmental Safety·Jinjun KanY Meriah Arias-Thode
Aug 16, 2016·Journal of Environmental Sciences (China)·Nannan YuanYuansheng Pei
Jun 5, 2015·Environmental Geochemistry and Health·Sabry M Shaheen, Jörg Rinklebe
May 3, 2016·The Science of the Total Environment·Anna Sophia KnoxJohn Seaman
Dec 26, 2016·Environmental Science and Pollution Research International·G LofranoM Notarnicola
Dec 18, 2013·Integrated Environmental Assessment and Management·Marc S GreenbergThomas F Parkerton
Jan 20, 2020·The Science of the Total Environment·Anna Sophia Knox, Michael H Paller
Apr 22, 2020·Ecotoxicology and Environmental Safety·Shengjian LiShixiong Wang

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