Environmental risk increase due to heavy metal contamination caused by a copper mining activity in Southern Brazil

Bidone, Edison Dausacker; Laybauer, Luciano; Castilhos, Zuleica Carmen; Maddock, John Edmund Lewis

doi:10.1590/s0001-37652001000200011

Cited by 14 publications

(8 citation statements)

References 5 publications

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“…), as well as in Brazil (Bidone et al. , Pereira et al. ), where the recent burst of a mining waste dam released ~35 million liters of metal‐contaminated mud (Santos et al.…”

mentioning

confidence: 99%

“…Although naturally occurring and essential for marine organisms, high concentrations of copper may be stressful for photosynthetic organisms. Mining activities, the use of fungicides and bactericides and the inadequate disposal of domestic and industrial waste are some of the anthropogenic sources of this metal, which may now be found in increased concentrations around the world (Wang et al 2013, Zrelli et al 2015, T oth et al 2016, as well as in Brazil (Bidone et al 2001, Pereira et al 2007, where the recent burst of a mining waste dam released~35 million liters of metalcontaminated mud (Santos et al 2015).…”

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confidence: 99%

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Ocean warming and copper pollution: implications for metabolic compounds of the agarophyte Gelidium floridanum (Gelidiales, Rhodophyta)

Kreusch

Poltronieri

Bouvie

et al. 2018

Journal of Phycology

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Ocean warming is increasing and scientific predictions suggest a rise of up to 4°C in sea water temperatures. The combination of a polluted and warmer environment may be detrimental for aquatic species, especially for primary producers such as seaweeds. This study investigated the potential for interactive effects of an increased seawater temperature in a copper‐rich environment on the photosynthetic pigments and metabolic compounds of the red seaweed Gelidium floridanum. Seaweed samples were cultivated in a factorial design with temperature (24°C and 30°C), copper (0 and 3 μM), and time (7 and 14 d). The exposure of G. floridanum to copper and 30°C for 7 d resulted in a lower concentration of chlorophyll a, smaller phycobiliprotein rods and lower concentration of soluble sugars. After 14 d of cultivation, a higher concentration of chlorophyll a and soluble sugars could be observed on seaweeds cultivated under 30°C. The accumulation of carotenoids and the release of phenolic compounds indicated specific protective mechanisms against temperature and copper, respectively. Overall, seaweeds grew less when exposed to copper 3 μM at 30°C.

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“…), as well as in Brazil (Bidone et al. , Pereira et al. ), where the recent burst of a mining waste dam released ~35 million liters of metal‐contaminated mud (Santos et al.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Ocean warming and copper pollution: implications for metabolic compounds of the agarophyte Gelidium floridanum (Gelidiales, Rhodophyta)

Kreusch

Poltronieri

Bouvie

et al. 2018

Journal of Phycology

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“…The assumption made when adding hazard quotients is that no synergistic or antagonistic effect occurs by the multiple exposures. When HI > 1, there may be concern for potential health effects (US EPA 1989;Bidone et al 2001). When a high HI is observed, the toxicity of pollutants should be individually evaluated, considering the different health effect endpoints in the human body (US EPA 2001).…”

Section: Toxicological Risk Assessmentmentioning

confidence: 99%

“…It is advisable to start the risk assessment with 'the worst case study', considering extreme exposure patterns, as well as temporal peaks of pollution (Bidone et al 2001). In order to better protect human health, we used a conservative approach, screening the most critical potential conditions of contamination by the selected heavy metals.…”

Section: Toxicological Risk Assessmentmentioning

confidence: 99%

“…In the second scenario (B), the same metals were present in water samples, but all the chromium would be converted to its most toxic hexavalent form. According to Bidone et al (2001), copper is classified as noncarcinogenic, but sufficient data is not available to derive its reference dose, so that it would not be possible to estimate the hazard quotient for human health. Although there is presently no copper RfD in the IRIS database (US EPA 2004), in the screening level risk assessment, we assumed a RfD ¼ 1.0 mg kg )1 of body weight day, as reported by Hatje (1996), Ortiz (1999), Spanemberg (1999), and Guerra (2000).…”

Section: Toxicological Risk Assessmentmentioning

confidence: 99%

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Exposure to Selected Heavy Metals Through Water Ingestion in an Area Under the Influence of Tanneries

Rodrigues

Formoso

2005

Environ Geochem Health

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This study evaluated the potential toxicological risk posed to human health due to the exposure to heavy metals by water ingestion in an area affected by tanneries - the Cadeia-Feitoria hydrographic basin (Brazil). River water was collected at 10 sites, every 3 months, from July 1999 to April 2000. After acid digestion, total metal concentration was determined by inductively coupled plasma optical emission spectrometry (Cd, Cu, Cr, Ni, Zn), flame atomic absorption (Al, Fe, Pb, Mn), or cold vapor atomic absorption spectrometry (Hg). Cr(VI) was complexed with diphenyl-carbazide and detected by UV-vis spectrometry. In order to quantify the risk of exposure, the risk assessment methodology employed by the Environmental Protection Agency of the United States was applied at a screening level. The assumed scenarios included extreme exposure patterns (ingestion of untreated water, conversion of Cr(III) to Cr(VI), temporal peaks of pollution). Fe, Al, Cd, Hg, and Pb were not included in the risk analysis, since they showed a low toxicity potential or were undetected in the samples. The selected metals presented Hazard Quotients < 1, in the following order of increasing risk: Cu < Cr(III) < Zn < Ni < Mn < Cr(VI). Hazard indexes, representing the additive effect of contaminants, were also low in the basin (< 1), but comparatively increased in the lower reach of Feitoria and Cadeia Rivers. Although noncarcinogenic risk levels did not suggest possible adverse toxicological effects to the human population, a considerable deviation from background conditions was observed downstream the area where tanneries are mainly located.

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The Effects of Acute Copper and Ammonia Challenges on Ammonia and Urea Excretion by the Blue Crab Callinectes sapidus

Zimmer

Jorge

Wood

et al. 2017

Arch Environ Contam Toxicol

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Copper (Cu) is a persistent environmental contaminant that elicits several physiological disturbances in aquatic organisms, including a disruption in ammonia regulation. We hypothesized that exposure to Cu in a model crustacean (blue crab, Callinectes sapidus) acclimated to brackish water (2 ppt) would lead to hyperammonemia by stimulating an increase in ammonia production and/or by inhibiting ammonia excretion. We further hypothesized that urea production would represent an ammonia detoxification strategy in response to Cu. In a pilot experiment, exposure to 0, 100, and 200 µg/L Cu for 6 h caused significant concentration-dependent increases in ammonia excretion (J ). Based on these results, an acute 24-h 100 µg/L Cu exposure was conducted and this similarly caused an overall stimulation of J during the 24-h period, indicative of an increase in ammonia production. Terminal haemolymph total ammonia content (T ) was unchanged, suggesting that while ammonia production was increased, there was no inhibition of the excretion mechanism. In support of our second hypothesis, urea excretion (J) increased in response to Cu exposure; haemolymph [urea] was unaffected. This suggested that urea production also was increased. To further test the hypothesis that J increased to prevent hyperammonemia during Cu exposure, crabs were exposed to high environmental ammonia (HEA; 2.5 mmol/L NHHCO) for 12 h in a separate experiment. This led to a fourfold increase in haemolymph T , whereas J increased only transiently and haemolymph [urea] was unchanged, indicating that urea production likely does not contribute to the attenuation of hyperammonemia in blue crabs. Overall, Cu exposure in blue crabs led to increased ammonia and urea production, which were both eliminated by excretion. These results may have important implications in aquaculture systems where crabs may be exposed to elevated Cu and/or ammonia.

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Environmental risk increase due to heavy metal contamination caused by a copper mining activity in Southern Brazil

Cited by 14 publications

References 5 publications

Ocean warming and copper pollution: implications for metabolic compounds of the agarophyte Gelidium floridanum (Gelidiales, Rhodophyta)

Ocean warming and copper pollution: implications for metabolic compounds of the agarophyte Gelidium floridanum (Gelidiales, Rhodophyta)

Exposure to Selected Heavy Metals Through Water Ingestion in an Area Under the Influence of Tanneries

The Effects of Acute Copper and Ammonia Challenges on Ammonia and Urea Excretion by the Blue Crab Callinectes sapidus

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