Fluorosis Risks to Resident Hispid Cotton Rats on Land-Treatment Facilities for Petrochemical Wastes

Rafferty, Dan P.; Lochmiller, Robert L.; Kim, Soochong; Qualls, Charles W.; Schroder, Jackie L.; Basta, Nicholas T.; McBee, Karen

doi:10.7589/0090-3558-36.4.636

Cited by 14 publications

(7 citation statements)

References 17 publications

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“…Lead concentrations in bone were higher in winter (mean of 21.5 mg/kg) than summer (mean of 10 mg/ kg, p = 0.0003). The cotton rats trapped in the winter were older than those trapped in the summer [27]. In part, the higher bone Pb in the winter versus summer may be due to longer exposure periods.…”

Section: Resultsmentioning

confidence: 99%

Soil contamination and bioaccumulation of inorganics on petrochemical sites

Schroder

Basta

Lochmiller

et al. 2000

Enviro Toxic and Chemistry

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Petrochemical waste contains inorganic contaminants that can pollute soil and pose ecological risks to wildlife. Few studies have evaluated bioaccumulation of inorganic contaminants by small mammals from soil contaminated with petrochemical waste. In this study, we determined the extent of soil contamination with inorganics, the bioaccumulation of metals and F in bone of cotton rats (Sigmodon hispidus), and the relationship between contaminants in soil and in bone of cotton rats on petrochemical waste sites. Cotton rats and soils from 12 petrochemical‐contaminated and matched reference sites were analyzed over a three‐year period. The number of petrochemical‐contaminated sites with soil contamination (in parentheses) were Zn (12), Pb (9), Cr (9), Cu (8), F (7), Ni (7), Sr (6), Ti (5), V (5), Co (3), Ba (3), and Cd (2). Lead and F were the most frequently bioaccumulated contaminants in cotton rat bones. Bone Pb of 3.8 to 63.4 mg/kg was 2‐ to 42‐fold and bone F of 830 to 3,680 mg/kg was 5‐ to 23‐fold greater than mean bone Pb and F from reference sites. Bone Pb and F showed a seasonal trend with winter greater than summer levels. Bone F was an accurate predictor of dental fluorosis when bone F was low (< 1,000 mg/kg, no fluorosis) or high (>3,000 mg/kg, fluorosis) but was inaccurate for intermediate bone F (1,000–3,000 mg/kg). The prevalence of dental fluorosis on F‐contaminated sites was 50% higher in winter than summer. Strong relationships were found between bone F and HCl‐extractable F (r = 0.70) and bone F and total content of F (r = 0.85) in F‐contaminated soils. Land disposal of petrochemical wastes should limit the amount of inorganic contaminants applied to soil.

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Section: Resultsmentioning

confidence: 99%

Soil contamination and bioaccumulation of inorganics on petrochemical sites

Schroder

Basta

Lochmiller

et al. 2000

Enviro Toxic and Chemistry

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“…Lead concentrations in bone were higher in winter (mean of 21.5 mg/kg) than summer (mean of 10 mg/ kg, p ϭ 0.0003). The cotton rats trapped in the winter were older than those trapped in the summer [27]. In part, the higher bone Pb in the winter versus summer may be due to longer exposure periods.…”

Section: Bone Metal and F Contentmentioning

confidence: 90%

Soil Contamination and Bioaccumulation of Inorganics on Petrochemical Sites

Schroder¹,

Basta²,

Lochmiller³

et al. 2000

Environ Toxicol Chem

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Abstract-Petrochemical waste contains inorganic contaminants that can pollute soil and pose ecological risks to wildlife. Few studies have evaluated bioaccumulation of inorganic contaminants by small mammals from soil contaminated with petrochemical waste. In this study, we determined the extent of soil contamination with inorganics, the bioaccumulation of metals and F in bone of cotton rats (Sigmodon hispidus), and the relationship between contaminants in soil and in bone of cotton rats on petrochemical waste sites. Cotton rats and soils from 12 petrochemical-contaminated and matched reference sites were analyzed over a three-year period. The number of petrochemical-contaminated sites with soil contamination (in parentheses) were

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“…Fluorosis is well studied in rats as they are used as models in toxicology studies. Guinea pigs and rabbits are also susceptible and fluorosis has occurred in free-ranging cotton rats in sites contaminated by petrochemical waste (Rafferty et al, 2000). Pathognomonic lesions occur in teeth and bones.…”

Section: Toxicmentioning

confidence: 99%