Total and organic mercury in the starfish Ctenodiscus crispatus and the polychaete Maldanes sarsi from the Barents Sea

Ali, I. B.; Joiris, Claude R.; Holsbeek, Ludo

doi:10.1016/s0048-9697(97)84056-9

Cited by 9 publications

(1 citation statement)

References 18 publications

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“…However, analysis of mercury in worm tissues resulted in a range of 175 to 271 g/kg (dry), with the LIS sediments having the greatest concentrations followed by the 10% fly ash addition (Table 5). Although published mercury bioaccumulation data for polychaetes is limited, these values are similar to those reported in the polychaete Maldanes sarsi collected from relatively pristine waters of the Barents Sea: 130 to 450 g/kg (dry) [38]. Overall, despite the elevated levels of mercury in the class F 65.5% fly ash, the data suggested mercury was not readily released during the 28-d bioaccumulation study.…”

Section: Effects Of Fly Ash On Polychaete Mass Lipids and Bioaccumusupporting

confidence: 74%

Evaluation of the effects of coal fly ash amendments on the toxicity of a contaminated marine sediment

Burgess

Perron

Friedman

et al. 2009

Enviro Toxic and Chemistry

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Approaches for cleaning-up contaminated sediments range from dredging to in situ treatment. In the present report, we discuss the effects of amending reference and contaminated sediments with coal fly ash to reduce the bioavailability and toxicity of a field sediment contaminated with polycyclic aromatic hydrocarbons (PAHs). Six fly ashes and a coconut charcoal were evaluated in 7 d whole sediment toxicity tests with a marine amphipod (Ampelisca abdita) and mysid (Americamysis bahia). Fly ashes with high carbon content and the coconut charcoal showed proficiency at reducing toxicity. Some of the fly ashes demonstrated toxicity in the reference treatments. It is suspected that some of this toxicity is related to the presence of ammonia associated with fly ashes as a result of post-oxidation treatment to reduce nitrous oxides emissions. Relatively simple methods exist to remove ammonia from fly ash prior to use and fly ashes with low ammonia content are available. Fly ashes were also shown to effectively reduce overlying water concentrations of several PAHs. There was no evidence of the release of the metals cadmium, copper, nickel or lead from the fly ashes. A preliminary 28 d polychaete bioaccumulation study with one of the high carbon fly ashes and a reference sediment was also performed. Although preliminary, there was no evidence of adverse effects to worm growth or lipid content, or the accumulation of PAHs or mercury from exposure to the fly ash. These data show fly ashes with high carbon contents may represent viable remedial materials for reducing the bioavailability of organic contaminants in sediments.

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Section: Effects Of Fly Ash On Polychaete Mass Lipids and Bioaccumusupporting

confidence: 74%