Use of legal reserve areas as geochemical background in hydrosedimentology studies¹

Juchen, Carlos Roberto; Boas, Márcio Antônio Vilas; Poleto, Cristiano; Macedo, M. C. M.

doi:10.1590/s0100-06832014000600029

Cited by 4 publications

(6 citation statements)

References 20 publications

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“…Finally, the enrichment of these trace elements in sediments was measured by comparing the average values in sediments to the background values established by Juchen (2014) for this area of study. So, it can be stated that Cr (background: 52.4 mg kg -1 ) presents enrichment on street 4, in the center of the city, and Ni (background: 26 mg kg -1 ) enriches streets 3, 4 and 5.…”

Section: Resultsmentioning

confidence: 99%

Mineralogical and Chemical Characterization of Sediments From Impervious Urban Streets

Juchen¹,

Poleto²,

Boas³

et al. 2017

J. Urb. and Environ. Engng

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Abstract:This study aimed to determine the granulometric and mineralogical composition and the Cr, Ni and Pb trace element content in sediments collected from impermeable streets located in the urban perimeter of Toledo, PR, Brazil. The mineralogical analyses were performed by a diffractometer, the granulometric analyses by integrated sieving methods and laser diffraction, and the analyses of the trace elements in quartered fractions of the sediments were carried out by optical emission spectrometry with inductively coupled plasma (ICP-OES). It was concluded that the sediments had an average granulometry greater than 0.09 mm, with finer fractions represented by clay. The mineralogy identified ferruginous substances characteristic of Distroferric Red Latosol DRL, with a high presence of quartz and diopside. Statistically, it was shown that the sediment samples were significantly enriched with the trace elements Chromium and Nickel in the central area streets and with Lead in lower concentrations in the streets in the peripheral areas. The sediments have an average particle diameter greater than 0.09 mm, represented by sand, with fine sediments representing 2 to 6% of the samples. The software indicated that the sediments are from different anthropogenic sources. The diffractograms show peaks for quartz and diopside. Enrichment by trace elements was significant for chromium and nickel in the downtown area streets.

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Section: Resultsmentioning

confidence: 99%

Mineralogical and Chemical Characterization of Sediments From Impervious Urban Streets

Juchen¹,

Poleto²,

Boas³

et al. 2017

J. Urb. and Environ. Engng

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“…Os parques estaduais e as reservas municipais, exemplos de áreas especialmente protegidas pelo Sistema Nacional de Unidades de Conservação (SNUC), lei n° 9.985 do ano de 2000 que tem por finalidade a proteção dos ecossistemas, tratam-se de ambientes naturais normalmente altamente preservados (JUCHEN et al, 2014;MOREIRA et al, 2017; SANTOS; JESUS, 2017). Estas áreas possuem importância na realização de estudos de avaliação da qualidade ambiental de uma bacia hidrográfica, pois, nestas áreas, as concentrações de oligoelementos apresentam a segurança necessária para a construção de backgrounds que possibilitão a diferenciação de concentrações naturais e da contribuição antropogênica na avaliação de riscos sobre as matrizes ambientais de regiões próximas (ALMEIDA JR. et al, 2016;JUCHEN et al, 2014;NALINI JR, 2009).…”

Section: O Uso De Solos De Unidades De Conservação Ambiental Na Constunclassified

“…, variabilidades espaciais e temporais na área investigada, e particularidades do ambiente de estudo (ALMEIDA JR. et al, 2016;JUCHEN et al, 2014;MATSCHULLAT;OTTENSTEIN;REIMANN, 2000;NALINI JR., 2009). Assim, amostras de solos oriundas de áreas altamente preservadas das bacias hidrográficas consideradas no estudo constituem referenciais fidedignas de valores de ocorrência natural dos elementos nas áreas de estudo (BÁBEK et al, 2015; MATSCHULLAT; OTTENSTEIN; REIMANN, 2000; RODRIGUES; NALINI, 2009).…”

Section: O Uso De Solos De Unidades De Conservação Ambiental Na Constunclassified

“…A falta de referência no Brasil para oligoelementos para a avaliação da qualidade ambiental dos sedimentos, somada a variações e a anomalias espaciais nas concentrações geoquímicas, influenciam processos de tomada de decisão sobre contaminação antropogênica e dificulta a avaliação do risco ambiental de sedimentos nos sistemas hídricos (ALMEIDA JR. et al, 2016;BÁBEK et al, 2015;FADIGAS et al, 2006;JUCHEN et al; MATSCHULLAT; OTTENSTEIN; REIMANN, 2000; RODRIGUES; NALINI, 2009).…”

Section: Estratégias De Construção De Backgrounds Para Avaliação De Qunclassified

“…Acredita-se que o conhecimento do local de estudo (uso, ocupação, tipo de solo e atividade antrópica) seja uma prática relevante na gestão de decisão para o estabelecimento de um limite background (CCME, 1995;FADIGAS et al, 2006;JUCHEN et al; MATSCHULLAT; OTTENSTEIN; REIMANN, 2000;OMEE, 1993).…”

Section: Estratégias De Construção De Backgrounds Para Avaliação De Qunclassified

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Potenciais riscos associados à qualidade de sedimentos em zonas de prospecção mineral: Rio da Várzea, Rio Grande do Sul - Brasil

Silva¹

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Mineral prospection zones are known for their ability to alter environmental quality. The most recent cases of degradation of water resources in the cities of Brumadinho (MG), Mariana (MG) Santo Antônio do Grama (MG) and Barcarena (PA) show that this is a difficult theme to approach. The presence of potentially deleterious chemical species in mining tailings may negatively impact aquatic environments, making it impossible to use the contaminated water for consumption and leading to the extinction of local life. In this sense, environmental assessments in the mining, water and sediment tailings of water systems close to the mining areas present themselves as a tool to identify changes in the river basins that support them. Although studies point to the influence of mining activities on the quality of sediments of water systems, there are few contributions on the risks associated with the environmental quality of sediments in zones of mineral extraction of semiprecious rocks. Thus, this study characterized the influence of mineral extraction activities (amethyst, quartz, agate, calcite and gypsum) on the potential risk associated with the sediment quality of Rio de Várzea, southern Brazil, the world's largest region of ametetic rock extraction. Physical and chemical parameters (OD, pH, EH, CE, NTU, STD and T) of the water column were quantified in situ. Daily and monthly precipitations were also evaluated in the year of collection and the historical series (1976-2017) at the station 2753015, the fluviometry of the monthly and daily flows, and the historical flow series (2008-2017) at station 74270000, data from the National System Information on Water Resources. Sediment grading classes were investigated for coarse fractions (from 2000 to 75 μm) and for fine fractions (< 75 μm), their moisture content (gravimetric methods) was determined. Chemical species concentrations were quantified by Wavelength Scattering Spectrometry (WDXRF), Dispersive Energy X-ray Emission Spectrometry (EDXRF); Optical Emission Spectrometry by Coupled Inductive Plasma (ICP OES). It was demonstrated, through Background strategies and Environmental Quality Indexes, the moderate contamination of the sediments of Rio de Várzea-RS. It was established, by distinct geochemical strategies, the construction of the baseline (Background) of the Várzea River Watershed-RS, through the use of local soils of environmental preservation areas and, finally, the negative implication of the non use of local references in the evaluation of sediment quality.

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Geochemical Background in an Oxisol

et al. 2017

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Geochemical background establishment is indispensable to determine the actual state of contamination of soils and sediments. However, no scientific consensus exists regarding the methodology for determining these values. In this context, this study aimed to establish the geochemical background in an Oxisol (Rhodic Hapludox) by means of an integrated method that uses direct and indirect soil analyses to identify the most appropriate calculation methodology. Soil samples were collected in a permanent preservation area of the Cascavel River watershed, PR, Brazil. The elements Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, and Zn present in soil samples were quantified by flame atomic absorption spectrometry. The use of a permanent preservation area is the most effective method to establish the geochemical background in the Cascavel River watershed. However, soil chemical element concentrations have spatial variability and dependence, requiring the application of non-parametric statistical methods based on third quartile and median for establishing the geochemical background.

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Use of legal reserve areas as geochemical background in hydrosedimentology studies¹

Cited by 4 publications

References 20 publications

Mineralogical and Chemical Characterization of Sediments From Impervious Urban Streets

Mineralogical and Chemical Characterization of Sediments From Impervious Urban Streets

Potenciais riscos associados à qualidade de sedimentos em zonas de prospecção mineral: Rio da Várzea, Rio Grande do Sul - Brasil

Geochemical Background in an Oxisol

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