Geochemical mapping in stream sediments of the Carajás Mineral Province: Background values for the Itacaiúnas River watershed, Brazil

Salomão, Gabriel Negreiros; Dall’Agnol, Roberto; Sahoo, Prafulla Kumar; Angélica, Rômulo Simões; Filho, Carlos A. de Medeiros; Júnior, Jair da Silva Ferreira; Silva, Marcio Sousa da; Filho, Pedro Walfir Martins e Souza; Nascimento, Wilson R.; Costa, Marlene Furtado da; Guilherme, Luiz Roberto Guimarães; Siqueira, José Oswaldo

doi:10.1016/j.apgeochem.2020.104608

Cited by 30 publications

(23 citation statements)

References 54 publications

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“…Therefore, the M2MAD method based on the median value (Md) and median absolute deviation ( MAD ) was used to determine GBV. Reimann et al 21 and Salomão et al 22 recommended applying LTM2MAD method based on the median value (Md) and median absolute deviation (MAD) with log-transformed dataset. In addition, the Tukey Boxplot method (Tukey inner fence, TIF) was used, which is based on the following values: 75th percentile (Q 3 ) and inter quartile range (IQR).…”

Section: Methodsmentioning

confidence: 99%

“…In addition, the box plot method is used for calculations, which enables one to eliminate outliers from the data set. Among the statistical methods, mMAD (median ± 2 Median Absolute Deviation) and TIF (Tukey inner fence) with log-transformed data are most recommended 21 , 22 . Moreover, graphical methods are commonly used to calculate GBV.…”

Section: Introductionmentioning

confidence: 99%

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Causes of variations of trace and rare earth elements concentration in lakes bottom sediments in the Bory Tucholskie National Park, Poland

Sojka

Choiński

Ptak

et al. 2021

Sci Rep

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The objective of this study was to analyse spatial variability of the trace elements (TEs) and rare earth elements (REEs) concentration in lake bottom sediments in Bory Tucholskie National Park (BTNP); Poland. The following research questions were posed: which factors have a fundamental impact on the concentration and spatial variability of elements in bottom sediments, which of the elements can be considered as indicators of natural processes and which are related to anthropogenic sources. The research material was sediments samples collected from 19 lakes. The concentrations of 24 TEs and 14 REEs were determined. The analyses were carried out using the inductively coupled plasma mass spectrometry (ICP-QQQ). Cluster analysis and principal component analysis were used to determine the spatial variability of the TEs and REEs concentrations, indicate the elements that are the indicators of natural processes and identify potential anthropogenic sources of pollution. The geochemical background value (GBV) calculations were made using 13 different statistical methods. However, the contamination of bottom sediments was evaluated by means of the index of geo-accumulation, the enrichment factor, the pollution load index, and the metal pollution index. The BTNP area is unique because of its isolation from the inflow of pollutants from anthropogenic sources and a very stable land use structure over the last 200 years. This study shows high variability of TE and REE concentrations in lake sediments. The values of geochemical indices suggest low pollution of lakes bottom sediments. It was found that TEs originated mainly from geogenic sources. However, the concentrations of Li, Ni, Sc, Se, Be, Se, Ag, Re, Tl, Cd, Sb and U may be related to the impact of point sources found mainly in the Ostrowite Lake. Almost all REEs concentrations were strongly correlated and their presence was linked to with geochemical processes. The elements allowing to identify natural processes and anthropogenic pollution sources were Cr, Co, Cu, Ag, Cd, Zn, Bi, Re, Ba, Al and Rb in TEs group and Nd, Gd, Yb, Lu, Eu, Dy and Ce in REEs group. The analysis shows high spatial variability of TE and REE concentrations in lake sediments. The values of geochemical indices point to low pollution of lakes sediments. The anthropogenic sources only for two lakes had an impact on concentrations of selected TEs and REEs. The analyses allowed to identify elements among TEs and REEs documenting geochemical processes and those indicating anthropogenic sources of pollution.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Causes of variations of trace and rare earth elements concentration in lakes bottom sediments in the Bory Tucholskie National Park, Poland

Sojka

Choiński

Ptak

et al. 2021

Sci Rep

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“…Most of the unsampled sites are located in remote areas with severe access limitations. The detailed sampling procedure and description of different sampling media used in the ItacGMBP can be found elsewhere [24,[43][44][45][46].…”

Section: Sampling Proceduresmentioning

confidence: 99%

“…The ItacGMBP's analytical program was extensive, but only the relevant analyses for the present study are described. For more information, refer to previous studies [24,[43][44][45][46]. Both soil and stream sediment samples were submitted to the same preparation and analytical protocols.…”

Section: Sample Preparation and Chemical Analysesmentioning

confidence: 99%

Integrated Geochemical Assessment of Soils and Stream Sediments to Evaluate Source-Sink Relationships and Background Variations in the Parauapebas River Basin, Eastern Amazon

et al. 2021

Self Cite

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This study aims to handle an integrated evaluation of soil and stream sediment geochemical data to evaluate source apportionment and to establish geochemical threshold variations for Fe, Al, and 20 selected Potentially Toxic Elements (PTE) in the Parauapebas River Basin (PB), Eastern Amazon. The data set used in this study is from the Itacaiúnas Geochemical Mapping and Background Project (ItacGMBP), which collected 364 surface soil (0–10 cm) samples and 189 stream sediments samples in the entire PB. The <0.177 mm fraction of these samples were analyzed for 51 elements by ICP-MS and ICP-AES, following an aqua regia digestion. The geochemical maps of many elements revealed substantial differences between the north (NPB) and the south (SPB) of PB, mainly due to the geological setting. The new statistically derived threshold values of the NPB and SPB regions were compared to the threshold of the whole PB, reported in previous studies, and to quality guidelines proposed by Brazilian environmental agencies. The natural variation of geochemical background in soils and stream sediments of PB should be considered prior to defining new guideline values. At the regional scale, the local anomalies are mostly influenced by the predominant lithology rather than any anthropogenic impact.

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“…Moreover, the AMD would pollute the groundwater in the other aquifers through the cracks generated from the coal mining (Lv et al,2005;Zhou et al, 2006). With the discharge of AMD, these elements would pollute the surface water, the stream sediment, and the soil at the downstream of outfall (Khalil et al,2013;Bhattacharya et al, 2012;Salomão et al, 2020), which can gravely affect the quality of life and productivity of the residents in the mining area. Thus, studying the water and stream sediments from coal mine drainage can support water resource management, water quality evaluation as well as water and stream sediment restoration.…”

Section: Introductionmentioning

confidence: 99%

Chemical and Statistical Studies on Water and Stream Sediments Around the Coal Mine Area in Dazhu, China

Deng¹,

Wu²,

Ren³

et al. 2021

Preprint

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Coal mine pollution has become one of the most serious environmental problems in China and elsewhere. Water, in the form of groundwater and streams, as well as stream sediment samples, were collected from the coal mine area in Dazhu, Southwestern China. Different analyses, including the hydro-geochemical, multivariate analyses and X-ray analyses, were conducted to examine the coal mine pollution effect. The study results show that the groundwater and stream samples are slightly acidic to alkaline with pH values of 6.36 to 7.17 and 6.51 to 7.39, respectively. With the dissolution of carbonate and sulfate, a large amount of Ca2+, Mg2+, and SO42- is found in the groundwater and stream samples, which is higher than the environmental background value. Typically, the water samples are dominated by Ca2++Mg2+-HCO3- and Ca2++Mg2+-Cl-. According to Chinese standard and the World Health Organization’s guidelines, the water in the coal mine area is of good quality in terms of its physical and chemical properties, except for the concentrations of Fe and Mn (1925.14 and 12872.882 μg/L, respectively). Principal component analysis reveal two groups that explained the variance in the data consisting of SO42−, Ca2+, Mg2+, and low pH as well as HCO3−, Na+, and Cl−, which can reflect the acid mine drainage effects as well as different human activities or the evaporation found in low mountains and hills, respectively. Hence, the concentrations of metals and metalloids in the stream sediments are affected by the coal mine drainage, which are generally enriched in Cr, Mn, Zn, Sr, Co, Ni, Cu, Al, Ca, Fe, and Mg. Mn and Fe average concentrations are higher in the downstream Kongjiagou drain stream sediment samples were 2035.03 ppm and 6%, respectively, relative to the Mn and Fe average concentrations in Xiaojiagou of 453.04 ppm and 2.96%, respectively. Both Mn and Fe concentrations are higher than the background values. Ultimately, mine closures can help with the process of ecological and environmental recovery.

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Geochemical mapping in stream sediments of the Carajás Mineral Province: Background values for the Itacaiúnas River watershed, Brazil

Cited by 30 publications

References 54 publications

Causes of variations of trace and rare earth elements concentration in lakes bottom sediments in the Bory Tucholskie National Park, Poland

Causes of variations of trace and rare earth elements concentration in lakes bottom sediments in the Bory Tucholskie National Park, Poland

Integrated Geochemical Assessment of Soils and Stream Sediments to Evaluate Source-Sink Relationships and Background Variations in the Parauapebas River Basin, Eastern Amazon

Chemical and Statistical Studies on Water and Stream Sediments Around the Coal Mine Area in Dazhu, China

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