Appraisal of geochemical composition and hydrodynamic sorting of the river suspended material: Application of time-integrated suspended sediment sampler in a medium-sized river (the Sava River catchment)

Lučić, Mavro; Bačić, Niko; Vdović, Neda

doi:10.1016/j.jhydrol.2020.125768

Cited by 15 publications

(7 citation statements)

References 61 publications

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“…Singh et al [11] have also found that the presence of the nearby mining areas could be accounted for the higher concentration of the certain element in the coarse fraction. Similar explanation could be applied here for the samples pertaining to the river Sava (S2, S4, S6), Mura (Mu), and Ilova (Il) which could be considered as moderately polluted [39,41,44,45]. The abundance of Cr and Ni in the coarse fraction of the Sava River sediments and their low bioavailability [41] support the assumption that high concentrations of these metals are mainly of natural origin.…”

Section: Fine Fraction Vs Bulk Sediment For Metal Contaminantssupporting

confidence: 70%

“…Presented assessment of the quality of Croatian freshwater sediments showed some differences, depending on which fraction (fine or bulk) was used for evaluation. Results of our previous study [44] have shown that geochemical compositions of the SPM and fine sediment fraction of the Sava River were similar. By taking all that into account, we would propose the use of the fine fraction of settled sediments for assessment, which should primarily serve to screen out the non-hazardous sediments, and point at potentially hazardous ones, and not to be used as mandatory "pass/fail" environmental standards [43].…”

Section: Metal Contaminantsmentioning

confidence: 71%

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Partitioning of Metal Contaminants between Bulk and Fine-Grained Fraction in Freshwater Sediments: A Critical Appraisal

2021

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The distribution of six common metal contaminants (Cd, Cr, Cu, Ni, Pb, Zn) in the bulk (<2 mm) and fine fractions (<63 µm) of freshwater sediments was compared to conclude on the long-existing dilemma which fraction should be used in the investigation of the metal contamination. The environments included in the study (24 rivers, 8 lakes) were very different with respect to sediments origin and composition and they provided a good review of the possible scenarios. For the river sediments, particularly those having >40% of sand fraction, metal concentrations were up to seven times higher in the fine fraction, implying the necessity for considering sand dilution effect in compositional data analysis. The same samples were also characterized with higher organic matter content (OM) in the fine fraction. Lake environments were characterized by fine-grained sedimentation and the difference between metal concentrations in the bulk and fine fraction was not so expressed. The preparation of samples for the geochemical and compositional data mining should be carried out in accordance with the sedimentological characteristics of the investigated environment. It implies that the insight into geological setting and determination of sedimentological characteristics should be an obligatory part of monitoring/investigating metal contamination in freshwater sediments. For river sediments, the analysis of the fine sediment fraction or correction for sediment lithology are advisable.

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Section: Fine Fraction Vs Bulk Sediment For Metal Contaminantssupporting

confidence: 70%

Section: Metal Contaminantsmentioning

confidence: 71%

Partitioning of Metal Contaminants between Bulk and Fine-Grained Fraction in Freshwater Sediments: A Critical Appraisal

2021

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“…Based on the catchment land use information, we argue that TIMS can collect representative samples for generating sediment-associated biomarker signatures in the study catchment during the high discharge events responsible for soil erosion and sediment delivery, especially in the case of FFA and BFA. However, one potential issue with the TIMS (and indeed the ISCO) is that differences in the geochemical compositions of sediment collected in shallow and deep water using the sampler have recently been reported and attributed to hydrodynamic sorting (Lučić et al 2021 ). Further research is therefore warranted to explore how the position of TIMS in the water column and channel cross-section, especially in larger river systems, impacts on the biomarker composition and compound-specific stable isotope values assembled for sediment samples.…”

Section: Resultsmentioning

confidence: 99%

Comparison of sediment biomarker signatures generated using time-integrated and discrete suspended sediment samples

Upadhayay,

Granger,

Collins

2024

Environ Sci Pollut Res

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Sediment source fingerprinting using biomarker properties has led to new insights in our understanding of land use contributions to time-integrated suspended sediment samples at catchment scale. A time-integrated mass-flux sampler (TIMS; also known as the ‘Phillips’ sampler), a cost-effective approach for suspended sediment collection in situ. Such samplers are widely being used to collect sediment samples for source fingerprinting purposes, including studies using biomarkers as opposed to more conventional tracer properties. Here, we assessed the performance of TIMS for collecting representative sediment samples for biomarkers during high discharge events in a small lowland grassland-dominated catchment. Concentrations of long odd-chain n-alkanes (> C23) and both saturated free and bound fatty acids (C14-C32), as well as compound-specific 13C were compared between sediment collected by both TIMS and autosamplers (ISCO). The results showed that concentrations of alkanes, free fatty acids, and bound fatty acids are consistently comparable between TIMS and ISCO suspended sediment samples. Similarly, compound-specific 13C signals were not found to be significantly different in the suspended sediment samples collected using the different samplers. However, different magnitudes of resemblance in biomarker concentrations and compositions between the samples collected using the two sediment collection methods were confirmed by overlapping index and symmetric coordinates-based correlation analysis. Here, the difference is attributed to the contrasting temporal basis of TIMS (time-integrated) vs. ISCO (discrete) samples, as well as potential differences in the particle sizes collected by these different sediment sampling methods. Nevertheless, our findings suggest that TIMS can be used to generate representative biomarker data for suspended sediment samples collected during high discharge events.

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“…Quartz represents 8 -35 %wt and feldspars 4 -41 %wt. With increasing discharge, coarse grain-size classes increase their share in the SPM size distribution, often resulting in higher fractions of quartz (up to ~50 %wt (Slomberg et al, 2016)), feldspar or carbonates (Buffle et al, 1998;Henning et al, 2001;Hillier, 2001;Kravchishina et al, 2010;Lučić et al, 2021;Pont et al, 2002;Slomberg et al, 2016;Subramanian, 1979;Wall and Wilding, 1976). This grain size dependence is reflected in particle-number based SPM composition data (Table 1 (C)), where phyllosilicates amount to 66 -89 %n and quartz only up to 9 %n.…”

Section: Phyllosilicates Dominate the Mineral Fractionmentioning

confidence: 97%

Freshwater Suspended Particulate Matter – Key Components and Processes in Floc Formation and Dynamics.

Walch¹,

Kammer²,

Hofmann³

2022

Preprint

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Freshwater suspended particulate matter (SPM) plays an important role in many biogeochemical cycles and serves multiple ecosystem functions. Most SPM is present as complex floc-like aggregate structures composed of various minerals and organic matter from the molecular to the organism level. Flocs provide habitat for microbes and feed for larger organisms. They constitute microbial bioreactors, with prominent roles in carbon and inorganic nutrient cycles, and transport nutrients as well as pollutants, affecting sediments, inundation zones, and the ocean. Composition, structure, size and concentration of SPM flocs are subject to high spatiotemporal variability. Floc formation processes and compositional or morphological dynamics can be established around three crucial components: phyllosilicates, iron oxides/(oxy)hydroxides (FeOx) and microbial extracellular polymeric substances (EPS). These components and their interactions increase heterogeneity in surface properties, enhancing flocculation. Phyllosilicates exhibit intrinsic heterogeneities in surface charge and hydrophobicity. They are preferential substrates for precipitation or attachment of reactive FeOx. FeOx form patchy coatings on minerals, especially phyllosilicates, which increase surface charge heterogeneities. Both, phyllosilicates and FeOx strongly adsorb natural organic matter (NOM), preferentially certain EPS. EPS comprise various substances with heterogeneous properties that make them a sticky mixture enhancing flocculation. Microbial metabolism, and thus EPS release, is supported by the high adsorption capacity and favorable nutrient composition of phyllosilicates and FeOx supply essential Fe.

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Appraisal of geochemical composition and hydrodynamic sorting of the river suspended material: Application of time-integrated suspended sediment sampler in a medium-sized river (the Sava River catchment)

Cited by 15 publications

References 61 publications

Partitioning of Metal Contaminants between Bulk and Fine-Grained Fraction in Freshwater Sediments: A Critical Appraisal

Partitioning of Metal Contaminants between Bulk and Fine-Grained Fraction in Freshwater Sediments: A Critical Appraisal

Comparison of sediment biomarker signatures generated using time-integrated and discrete suspended sediment samples

Freshwater Suspended Particulate Matter – Key Components and Processes in Floc Formation and Dynamics.

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