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Title Risk evaluation for sludge-borne elements to wildlife food chains
Creator/Author Woodyard, D.K.
Publication Date1986 Jan 01
OSTI IdentifierOSTI ID: 5349617
Resource TypeThesis/Dissertation
Resource RelationThesis (Ph. D.)
Research OrgMichigan State Univ., East Lansing (USA)
Subject510200 -- Environment, Terrestrial-- Chemicals Monitoring & Transport-- (-1989) ;560300 -- Chemicals Metabolism & Toxicology; CADMIUM-- BIOLOGICAL ACCUMULATION;CADMIUM-- ECOLOGICAL CONCENTRATION;CHROMIUM-- BIOLOGICAL ACCUMULATION;CHROMIUM-- ECOLOGICAL CONCENTRATION;COPPER-- BIOLOGICAL ACCUMULATION;COPPER-- ECOLOGICAL CONCENTRATION;FOOD CHAINS-- CONTAMINATION;NICKEL-- BIOLOGICAL ACCUMULATION;NICKEL-- ECOLOGICAL CONCENTRATION;SEWAGE SLUDGE-- GROUND DISPOSAL;SEWAGE SLUDGE-- RECYCLING;SOILS-- CONTAMINATION;ZINC-- BIOLOGICAL ACCUMULATION;ZINC-- ECOLOGICAL CONCENTRATION; FORESTS;INSECTS;INVERTEBRATES;MAMMALS;RISK ASSESSMENT;TISSUE DISTRIBUTION;TOXICITY
Related SubjectANIMALS;ARTHROPODS;DISTRIBUTION;ELEMENTS;INVERTEBRATES;MANAGEMENT;METALS;SEWAGE;SLUDGES;TRANSITION ELEMENTS;VERTEBRATES;WASTE DISPOSAL;WASTE MANAGEMENT;WASTES
Description/Abstract Studies were conducted to evaluate the human and wildlife food chain risks from exposure to potentially toxic metals associated with recycling sludges to forest lands.^The fate of 5 selected metals, Cd, Cr, Cu, Ni, and Zn, were determined in both field and laboratory food chains exposed to sludge-borne metals.^Knowledge gained on the fate of the selected metals and existing knowledge of their toxicological properties were used to complete a risk assessment.^Some metals, primarily Cd and Cr, did accumulate in wildlife forages during the first year after application but returned to background concentrations by the second growing season.^Maximum metal concentrations were magnitudes less than doses suspected to elicit chronic toxicities in wildlife.^Tissues collected from herbivorous and omnivorous small mammals showed no evidence of metal accumulation.^Laboratory experiments support this observation.^The soil macroinvertebrate-vertebrate insectivore food chain did appear as a potential pathway for metals to accumulate, as woodcock (Philohela minor) fed sludge-contaminated earthworms concentrated Cd in kidney and liver tissues.^However, muscle tissues collected from the woodcock did not contain significant concentrations of the selected metals.
PublisherMichigan State Univ.,East Lansing, MI
Country of PublicationUnited States
LanguageEnglish
FormatPages: 191
AvailabilityUniversity Microfilms Order No. 87-07,209.
System Entry Date2001 May 13

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