Document Detail


Assessment of non-toxic, secondary effects of sorbent amendment to sediments on the deposit-feeding organism Neanthes arenaceodentata.
MedLine Citation:
PMID:  22372688     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Activated carbon (AC) amendments to sediments were tested for non-toxic, secondary effects on survival, weight change and energetic biomarkers of the deposit feeder Neanthes arenaceodentata. The tests employed silica sand, reference sediments and contaminated sediments. Survival was not affected by the sediment type, the AC dose (20% versus 5%) or the AC particle size. Without additional food supply, exposure to untreated and AC-amended sediments resulted in similar reduction of weight and lipid content, with no difference between ingestible and non-ingestible AC. Overall, whether with or without AC, the organisms showed signs of starvation, as the organisms would most likely rely on organic surface deposits for their diet in the environments from which the sediments were collected. When additional food was supplied, the organisms grew significantly and maintained higher lipid and glycogen contents. However, when feeding on fish food, organisms grew less in AC amendments with slightly lower lipid and glycogen contents relative to organisms exposed to untreated sediment. Batch tests show that AC did not sorb sediment-associated nitrogen but it sorbed nitrogen from fish food. Despite some effects of AC on these deposit feeders, absolute effects of AC amendments on growth and energy reserves were not significant.
Authors:
Elisabeth M-L Janssen; Yongju Choi; Richard G Luthy
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-28
Journal Detail:
Title:  Environmental science & technology     Volume:  -     ISSN:  1520-5851     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-2-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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