Human and environmental contamination in the Iron Quadrangle, Brazil

Matschullat, Jörg; Borba, Ricardo Perobelli; Deschamps, Eleonora; Figueiredo, Bernadino Ribeiro; Gabrio, T.; Schwenk, Michael

doi:10.1016/s0883-2927(99)00039-6

Cited by 152 publications

(101 citation statements)

References 12 publications

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“…Therefore, they were classified as the first angiosperm As hyperaccumulators. Because As uptake and accumulation from soils by plants are influenced by factors such as plant species (Matschullat et al 2000), soil arsenic concentration (Jiang and Singh 1994), and other chemical and physical soil properties, among which the concentrations of other ions, particularly phosphate (Khattak et al 1991;Jiang and Singh 1994;Matschullat et al 2000), or the age of the plants, comparing the Zarshuran and Dashkasan data sets would be very useful, possibly providing confirmatory evidence, or new insights.…”

Section: Introductionmentioning

confidence: 99%

Arsenic in soil and vegetation of a contaminated area

Karimi

Ghaderian

2013

Int. J. Environ. Sci. Technol.

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Plant and soil samples were collected from one uncontaminated and four contaminated sites (in the Dashkasan mining area western Iran). Total and water-soluble arsenic in the soil ranged from 7 to 795 and from 0.007 to 2.32 mg/kg, respectively. The highest arsenic concentration in soil was found at the ore dressing area (up to 1,180 mg/kg) and lowest at an uncontaminated area (up to 11 mg/kg). A total of 49 plant species belonging to 15 families were collected from four sampling sites. A significant positive correlation was detected between the concentrations of arsenic in plant dry matter and those in soils. The highest arsenic concentrations were found in Hyoscyamus kurdicus Bornm. (up to 205 mg/kg) and Helichrysum oligocephalum DC. (up to 162 mg/kg). These two accumulator species could have potential for soil clean-up by phytoextraction. The data have been compared with those for the Zarshuran mining area (north-western Iran) obtained in a former study.

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Section: Introductionmentioning

confidence: 99%

Arsenic in soil and vegetation of a contaminated area

Karimi

Ghaderian

2013

Int. J. Environ. Sci. Technol.

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“…Arsenic releasing occurs through natural and anthropogenic processes, for example, volcanic activity and wastes from mining of gold, silver, cobalt, nickel, lead, copper and antimony (Matschullat et al, 2000;Meharg & Hartley-Whitaker, 2002), for which the separation technologies and environmental fate are incipient.…”

Section: Introductionmentioning

confidence: 99%

Potential of macrophyte for removing arsenic from aqueous solution

et al. 2012

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-The potential of three aquatic macrophytes, Azoll caroliniana, Salvinia minima and Lemna gibba, was evaluated in this work aimed at selection of plants to be used in remediation of environments contaminated by arsenic (As). The experiments were carried out in a greenhouse during six days in pots containing Hoagland solution (¼ ionic strength) at As concentrations of 0.5; 2.5 and 5.0 mg L -1 . The three species showed greater As accumulation as the concentration of the metalloid in solution increased. However, a reduction was detected in fresh and dry mass gain when the plants were exposed to high As concentrations. The macrophytes showed differences in efficiency of removal of As in solution. A. caroliniana, S. minima and L. gibba accumulated, on average, 0.130; 0.200; and 1.397 mg mDM -1 , respectively, when exposed to 5.0 mg L -1 of As. The macrophytes absorbed a greater quantity of As in solution with low phosphate content. The greater As concentration in L. gibba tissues lowered the chlorophyll and carotenoid contents as shown by the high chlorosis incidence. Lemna gibba also exhibited a decrease in leaf size, with the total chlorophyll and carotenoid synthesis not being affected by As in A. caroliniana. This species exhibited purplish leaves with high concentration of anthocyanin, whose presence suggested association to phosphate deficiency. Marginal necrosis occurred on S. minima floating leaves, with the released daughter-plants not showing any visual symptoms during the treatment. The percentage of As removed from the solution decreased when the plants were exposed to high concentrations of the pollutant. Among the three species studied, only L. gibba could be considered an As hyper-accumulator. The use of this plant species for remediation of aquatic environments was shown to be limited and requires further investigation.Keywords: bio-remediation, phyto-remediation, aquatic plants, pollutant. RESUMO -O potencial de três macrófitas aquáticas -Azolla caroliniana, Salvinia mínima e Lemna gibba -foi avaliado neste estudo, com vistas à seleção de plantas para remediação de ambientes contaminados com arsênio (As). Os experimentos foram conduzidos em casa de vegetação durante seis dias, em vasos contendo solução Hoagland (¼ força iônica) e As nas concentrações de

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“…It is worth emphasizing that even though the gold mining areas in Brazil are numerous, and despite the proven high As concentrations in their surroundings (Matschullat et al, 2000;Deschamps et al, 2002;Borba et al, 2003;Andrade et al, 2008), studies on As bioavailability are still unprecedented in Brazil. Thus, the data from this study could not be compared with others carried out in the country.…”

Section: Resultsmentioning

confidence: 99%

Replication of an ivg protocol to estimate bioaccessible arsenic in materials from a gold mining area in Brazil

Ono

Guilherme

Mendes

et al. 2012

Rev. Bras. Ciênc. Solo

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SUMMARYTests for bioaccessibility are useful in human health risk assessment. No research data with the objective of determining bioaccessible arsenic (As) in areas affected by gold mining and smelting activities have been published so far in Brazil. Samples were collected from four areas: a private natural land reserve of Cerrado; mine tailings; overburden; and refuse from gold smelting of a mining company in Paracatu, Minas Gerais. The total, bioaccessible and Mehlich-1-extractable As levels were determined. Based on the reproducibility and the accuracy/precision of the in vitro gastrointestinal (IVG) determination method of bioaccessible As in the reference material NIST 2710, it was concluded that this procedure is adequate to determine bioaccessible As in soil and tailing samples from gold mining areas in Brazil. All samples from the studied mining area contained low percentages of bioaccessible As.Index terms: trace elements, in vitro tests, environmental pollution.(1) Part of the dissertation of the first author, student of the Soil Science Graduation Program, Soil Science Department, Federal University of Lavras, CP 3037, Campus UFLA. CEP 37200-000 Lavras (MG

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Human and environmental contamination in the Iron Quadrangle, Brazil

Cited by 152 publications

References 12 publications

Arsenic in soil and vegetation of a contaminated area

Arsenic in soil and vegetation of a contaminated area

Potential of macrophyte for removing arsenic from aqueous solution

Replication of an ivg protocol to estimate bioaccessible arsenic in materials from a gold mining area in Brazil

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