Mobility of trace elements between the river water, the sediments, and the pore water of Las Catonas Stream, Buenos Aires Province, Argentina

Cantera, Cecilia Gisela; Scasso, Roberto A.; Tufo, Ana Elisabeth; Villalba, Laura Belén; Afonso, Marı́a dos Santos

doi:10.1007/s12665-018-7699-5

Cited by 6 publications

(18 citation statements)

References 19 publications

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“…The identification of point sources of pollutants in these waters is difficult due to the intermittent and irregular discharges [62], but the detection of heavy metal entry is feasible through the analysis of the anaerobic sediments, where the metals are rapidly incorporated and accumulated. In accordance with our previous reports [3,4,6,32,37,63], as shown in Table 1, the level of contamination of the superficial waters at the SF site was much higher than in the DR site. The very low values of DO and ORP, and high values of nitrates and phosphates measured in SF depict the anaerobic state of the waters due to oxygen depletion by microbial activity on reduced compounds.…”

Section: Discussionsupporting

confidence: 92%

“…In the case of natural clays, the SSA values measured in the DR clay fractions were consistent with the particle size and corresponded to values typically found in clays with a mineral composition characterized by the presence of illite and smectite [7,32] and with a low content of OM [16,66,67]. Concerning the clays extracted from SF, we found that the upper section of the SF core (SF1: 0-5 cm) had particles of a smaller size than the respective sediment particles.…”

Section: Discussionsupporting

confidence: 84%

“…N 2 adsorption-desorption isotherms at 77 K for DR and SF sediments are shown in Figure S5. In all cases, a type IV shape, and a type H3 hysteresis loop according to the International Union of Pure and Applied Chemistry (IUPAC) classification were found [46,48], in agreement with the adsorption-desorption curve previously reported for sediments from nearby sites on the same riverbed [6,7,32]. These features are typical of mesoporous materials and indicate that the particles are, in general, agglomerated and with pores between parallel plates (slit-shaped) [46,48,53].…”

Section: Surface Area and Textural Characteristics Bulk Sediments Andsupporting

confidence: 88%

“…The presence of these mineral compounds was not confirmed here, but gave the SF sediments a black color and the appearance of a very thick plastic sludge that differed significantly from that of DR, which had a brownish color and a granular appearance, as seen in Figure S12. The main crystalline components here identified in both DR and SF sediments were quartz, feldspar, albite, and clay minerals, common in the outcrops of the riverbanks and found to also be present at other sites of the same river [6,7,32]. This evidenced a substantial similarity in the mineral composition of the pristine and contaminated sediments regardless of depth or contamination, with no major differences found between their clay fractions either.…”

Section: Discussionsupporting

confidence: 50%

“…The influence of the OM on the structure of sediments must be analyzed considering the indigenous microbial assemblages and the level of pollution as these can influence the mineral composition of sediments and their clays. Reciprocally, the type of clays and their physicochemical characteristics can favor the retention of heavy metals (zinc, copper, chromium, and lead, among others) and the agglomeration of particulate organic material in a highly contaminated environment [9,31,32], thus conducive to the development of characteristic microbial assemblages.…”

Section: Introductionmentioning

confidence: 99%

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Contamination Alters the Physicochemical and Textural Characteristics of Clays in the Sediments of the Peri Urban Reconquista River, Affecting the Associated Indigenous Microorganisms

et al. 2021

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The physicochemical and textural characteristics of river sediments and, essentially, their clays, are at the center of a network of biological and geochemical factors that are mutually modifying. Therefore, the contamination, the characteristics of the clays, and the associated microorganisms strongly influence each other. In this work, sediments from two sites of the urban Reconquista River, near Buenos Aires City, Argentina, exposed to different environmental contexts were characterized. The huge differences in the organic matter content in the vertical profile between both sediments strongly evidenced the polluted status of San Francisco (SF) site as opposed to the Dique Roggero (DR) site. Thorough physicochemical and textural characterization of the sediments and their clay fraction performed by pH, Oxidation-reduction potential (ORP), spectrophotometry, XRD, laser diffraction, N2 adsorption–desorption isotherms, EDS, and SEM measurements revealed that organic matter (DR: 41 ± 5 g kg−1; SF: 150 ± 30 g kg−1) intervened in the retention of heavy metals (DR: 5.6 mg kg−1 Zn, 7 mg kg−1 Cu, 3.1 kg−1 Cr; SF: 240 mg kg−1 Zn, 60 mg kg−1 Cu, 270 mg kg−1 Cr) and affected the level of association and the formation of mineral–organic aggregates (DR: 15 ± 3 μm; SF: 23 ± 4 μm). This can be decisive in the surface interaction required for the establishment of bacterial assemblages, which determine the biogeochemical processes occurring in sediments and have a key role in the fate of contaminants in situ and in the remediation processes that need to be applied to restore the anoxic contaminated sediments.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 84%

Section: Surface Area and Textural Characteristics Bulk Sediments Andsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 50%

Section: Introductionmentioning

confidence: 99%

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Contamination Alters the Physicochemical and Textural Characteristics of Clays in the Sediments of the Peri Urban Reconquista River, Affecting the Associated Indigenous Microorganisms

et al. 2021

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Assessment of anthropogenic pollution using multiple hydrogeochemical tools and statistical analysis in rural plain basins of the Argentinian Pampean Plain

Borzi

Idaszkin

Tanjal

et al. 2021

River Research & Apps

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Chemistry of surface water and groundwater can be conditioned by geology, anthropic influence, and exchange of flow between them. The Pampean Plain located in Argentina has gaining streams and mainly rural activities. An increase in the concentration of chemical values of surface waters with respect to groundwater can be attributed to the anthropogenic contribution. The aim of this work was to identify the natural and/or anthropic processes that determine the chemistry of surface water and groundwater in a sector of the Pampean Plain of Argentina through the analysis of major and trace elements, 18 O and 2 H isotopes, and statistical tools. A surface water and groundwater sampling network was designed, where physicochemical parameters were measured, and samples were taken to determine major and trace elements and stable isotopes of water. The results indicate that dissolution, cation exchange, and evaporation are the main processes that determine the chemistry of the major elements associated with natural processes without showing evidence of anthropic involvement. Some trace elements that are statistically associated with major ions evidence water-sediment interaction within the aquifer. On the other hand, trace elements, as heavy metals, present a higher concentration in surface water compared to groundwater. This fact, evidences an anthropogenic contribution attributable to anthropic activities. The multivariate statistical analysis allowed discriminating between those trace elements associated with natural processes from those influenced by anthropic activity, even when these elements' concentration was very low. K E Y W O R D Sgaining streams, geochemical processes, multivariate statistical analysis, Samboromb on River basin, trace pollutants | INTRODUCTIONThe chemistry of surface water and groundwater can be controlled by many factors, including atmospheric chemistry, geology, vegetation (or organic matter decay), and also anthropic factors (Jiang, Wu,

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Spatial and Seasonal Variations in the Bacterial Community of an Anthropogenic Impacted Urban Stream

et al. 2022

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Mobility of trace elements between the river water, the sediments, and the pore water of Las Catonas Stream, Buenos Aires Province, Argentina

Cited by 6 publications

References 19 publications

Contamination Alters the Physicochemical and Textural Characteristics of Clays in the Sediments of the Peri Urban Reconquista River, Affecting the Associated Indigenous Microorganisms

Contamination Alters the Physicochemical and Textural Characteristics of Clays in the Sediments of the Peri Urban Reconquista River, Affecting the Associated Indigenous Microorganisms

Assessment of anthropogenic pollution using multiple hydrogeochemical tools and statistical analysis in rural plain basins of the Argentinian Pampean Plain

Spatial and Seasonal Variations in the Bacterial Community of an Anthropogenic Impacted Urban Stream

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