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- Title
Heavy metals in recent sediments and bottom-fish under the influence of tanneries in South Brazil.
- Authors
Rodrigues, Maria Lucia Kolowski; Formoso, Milton Luiz Laquintinie
- Abstract
Selected metals were evaluated in surface sediments from Cadeia and Feitoria Rivers (Brazil), potentially affected by tanneries. Statistical factor analysis of sediment data allowed the identification of critical} metals and priority areas for biological monitoring, i. e., chromium and mercury at the lower course of Feitoria River. Non-piscivorous bottom-fish from the species Rineloricaria cadeae ( violinha) were collected at reference and contaminated sites. Chromium was undetected} in fish tissues, and mercury accumulated in individuals living in contact with contaminated deposits. Mercury contents in fish were below World Health Organization quality standard for human consumption (0.5 μg/g). The ratio of total mercury content in fish (wet weight) to sediment (dry weight, <63 μm) was 0.5 and 0.7 at reference and contaminated sites, respectively. A risk assessment based on hazard index showed that maximum consumption of fish from contaminated site by human population should be 32 g/day, while at reference site the allowable amount could reach 140 g/day.
- Subjects
BRAZIL; HEAVY metals; SOIL composition; SEDIMENTS; SEDIMENTATION &; deposition; GROUNDFISHES; MERCURY; CHROMIUM; TANNERIES; RISK assessment
- Publication
Water, Air & Soil Pollution, 2006, Vol 176, Issue 1-4, p307
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-006-9170-6