Avaliação integrada da contaminação por metais potencialmente tóxicos em área de disposição de resíduo de mineração de chumbo - Adrianópolis (PR)

Kasemodel, Mariana Consiglio

doi:10.11606/t.18.2018.tde-05122017-094900

Cited by 3 publications

(7 citation statements)

References 70 publications

(109 reference statements)

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“…Concentrations up to 378 mg kg −1 of Cd in the soil and 51 µg L −1 of Cd in the groundwater of an area near a landfill in Egypt were also reported [3]. In Adrianópolis (southeastern Brazil), concentrations up to 28,585 mg kg −1 of Pb, 99,568 mg kg −1 of Zn, and 30 mg kg −1 of Cd were found in a mining waste disposal area [4]. This improper disposal caused contamination, and concentrations of up to 33.4 of Pb [5] and 15.8 of As [6] were found in sediments of the Cananéia-Iguape estuarine complex.…”

Section: Introductionmentioning

confidence: 88%

“…Soil, water, and sediment contamination by potentially toxic metals is a global problem that can be caused by the inadequate disposal of waste from several anthropic activities. High concentrations of metals and metalloids such as arsenic (As), cadmium (Cd), copper (Cu), chromium (Cr), lead (Pb), and zinc (Zn) are reported in several regions [1][2][3][4][5][6][7]. For instance, As concentrations of 350 mg L −1 and 860 mg kg −1 were found in water and sediments, respectively, in the Iron Quadrangle (Minas Gerais, Brazil), which is related to the release from mining tailings into the water bodies [1].…”

Section: Introductionmentioning

confidence: 99%

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Soils of the Ribeira Valley (Brazil) as Environmental Protection Barriers: Characterization and Adsorption of Lead and Cadmium

et al. 2022

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In waste disposal areas, soils can be used as environmental protection barriers to retain potentially toxic metals. Although most studies focus on lateritic soils, it is still of interest to evaluate other soil types, aiming to select the best materials among those available near the contamination area, reducing costs and construction efforts. This paper characterizes and evaluates the behavior of 13 soil materials collected in a region (Ribeira Valley, Brazil) with a history of improper mining waste disposal for the retention of lead (Pb) and cadmium (Cd) and their possible use as environmental protection barriers. All soils were acidic, kaolinitic, with negatively charged particles. Soils were grouped into three classes according to soil properties, such as particle size distribution, cation exchange capacity (CEC), and specific surface area (SSA), using cluster and principal component analysis. The Pb and Cd adsorption capacities ranged from 288 to 479 µg g−1 and 207 to 326 µg g−1, respectively, obtained from batch equilibrium tests. In general, all soils presented suitable characteristics for the retention of Pb and Cd, but four of them (1 to 4) showed the highest adsorption capacities, probably due to their larger SSA, CEC and percentage of fines (clay + silt).

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Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Soils of the Ribeira Valley (Brazil) as Environmental Protection Barriers: Characterization and Adsorption of Lead and Cadmium

et al. 2022

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“…This range was chosen based on Pb concentrations in leachate of mining tailings and slag from Adrianópolis (Ribeira Valley). These concentrations reached 77.10 mg/L (Raimondi 2014;Kasemodel 2017). For this test, we followed the methodology proposed by Roy et al (1992) and Zuquette et al (2008).…”

Section: Batch Equilibrium Testsmentioning

confidence: 99%

“…Even so, the soil studied in this research proved to be efficient to adsorb Pb in solutions with concentrations close to those found in leachate from mining waste. Kasemodel (2017) studied soil and slag samples from a waste disposal area in Adrianópolis. The Pb concentrations found in the leach test extracts ranged from 5.16 to 77.1 mg/L.…”

Section: Comentioning

confidence: 99%

Adsorption of lead (Pb) in strongly weathered tropical soil (Ribeira Valley region - Brazil)

et al. 2019

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Lateritic soils have been widely used in the construction of landfill base liners for municipal and industrial waste. On the other hand, there is little practice in the use of strongly weathered residual soils for this finality. The use of local soil for the construction of liners in order to waterproof and retain contaminants represents an alternative to control this type of contamination. Thus, the objective of this study was to determine the physical and chemical properties of a strongly weathered tropical soil (residual soil) collected in the city of Eldorado Paulista (Ribeira Valley), and to evaluate the abilityof this soil to adsorb lead (Pb). The contamination of soil and water by Pb due to inadequate mining waste disposal is common in this region. The Pb was adsorbed by the residual soil, mainly at the lowest initial concentrations. When the initial concentration of 20 mg L-1 was used, the adsorption percentage of Pb was 92.5% and when the initial concentration was 100 mg L-1, the adsorption rate was 81.7%. In addition to the retention of Pb, this soil presented the following characteristics which are favorable for using soils in the construction of liners: fine granulometry, liquid limit (LL) of 57%, plasticity index (PI) of 33%, oxidizing medium and the predominance of negative charges on the surface of the colloidal particles. Thus, it is concluded that the weathered tropical residual soil exhibits characteristics that allow it to be used as a liner in the disposal of residues containing Pb.

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“…Na visita de 2007de , Rúbio et al (2008 observaram que foi colocada uma camada de solo e vegetação rasteira como cobertura do aterro, mas essa cobertura estava sendo retirada pela chuva e havia vários pontos já desprotegidos. Essa situação também foi descrita por Raimondi (2014), Kasemodel et al (2016), Kasemodel (2017) e Rodrigues (2018).…”

Section: Mineração No Vale Do Ribeiraunclassified

Estudo de misturas de solo residual de Eldorado Paulista (SP) com turfa visando retenção de metais potencialmente tóxicos

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Na região do Vale do Ribeira, os resíduos provenientes do beneficiamento e fundição do minério de chumbo (Pb) foram lançados por décadas no rio Ribeira de Iguape ou depositados diretamente na superfície do solo, sem qualquer proteção, constituindo fontes de contaminação do solo e das águas por metais potencialmente tóxicos. O uso do solo local na construção de barreira selante para impermeabilização e retenção dos contaminantes representa uma alternativa para o controle desse tipo de contaminação. Por isso é importante estudar os solos da região, sua capacidade de retenção de metais potencialmente tóxicos, e alternativas de baixo custo para melhorar suas propriedades físicas e químicas. A adição de matéria orgânica é um caminho para aumentar a retenção de cátions. Assim, a presente pesquisa visou verificar se um solo residual proveniente de Eldorado Paulista, no Vale do Ribeira, apresenta características favoráveis para o emprego como barreira selante na disposição de resíduos de mineração desta região; bem como analisar a melhoria da sua capacidade de adsorção de Pb e cádmio (Cd), quando misturado com turfa, um material orgânico com elevada capacidade de retenção de metais e de baixo custo, em proporções de 10 e 20% (m/m). Foram realizados ensaios de caracterização para determinação das propriedades físicas, químicas e mineralógicas do solo. Para avaliação da capacidade de adsorção de Pb e Cd pelo solo e pelas misturas solo-turfa, foram realizados ensaios de equilíbrio em lote. O solo estudado é um solo residual argiloso, cuja fração argilosa é predominantemente composta por caulinita. Ele apresenta alguns pontos favoráveis para que seja utilizado como barreira selante na retenção de cátions metálicos, como granulometria predominantemente fina (54,5% de argila), índice de plasticidade adequado (25,1%), meio oxidante (Eh = +333 mV), predomínio de cargas negativas na superfície dos coloides (ΔpH=-0,9 e PESN = 3,6) e baixa condutividade hidráulica quando compactado (na ordem de 10-9 m/s). Por outro lado, algumas características são menos interessantes para a retenção de metais, como baixa capacidade de troca catiônica (41,4 mmolc/dm 3), baixo teor de matéria orgânica (9 g/kg) e pH ácido (4,6). A adição de turfa em proporções de 10 e 20% (m/m) ao solo aumentou o teor de matéria orgânica em 4,3 vezes e 6,4 vezes, respectivamente. A CTC também aumentou, variando de 41,4 mmolc/dm 3 para o solo a 101,7 mmolc/dm 3 para a mistura com 10% de turfa, e ainda a 143,1 mmolc/dm 3 para a mistura com 20% de turfa. Não foram observadas mudanças de pH. Observou-se também a melhoria da capacidade de adsorção de Pb e Cd. O solo residual natural apresentou eficiência de remoção de Pb de 54% a 100% para concentrações iniciais de 22 a 232 mg/L deste metal. A mistura com maior teor de turfa (20%) removeu 95,3% a 100% do Pb para concentrações iniciais de 31 a 267 mg/L. O coeficiente de distribuição Kd aumentou de 4,57 cm 3 /g (para o solo natural) até 58,57 cm 3 /g (para a mistura com 20% de turfa). O Kf aumentou de 75,75 a 508,86 cm 3 /g...

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Avaliação integrada da contaminação por metais potencialmente tóxicos em área de disposição de resíduo de mineração de chumbo - Adrianópolis (PR)

Cited by 3 publications

References 70 publications

Soils of the Ribeira Valley (Brazil) as Environmental Protection Barriers: Characterization and Adsorption of Lead and Cadmium

Soils of the Ribeira Valley (Brazil) as Environmental Protection Barriers: Characterization and Adsorption of Lead and Cadmium

Adsorption of lead (Pb) in strongly weathered tropical soil (Ribeira Valley region - Brazil)

Estudo de misturas de solo residual de Eldorado Paulista (SP) com turfa visando retenção de metais potencialmente tóxicos

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