Abstract
The Salado River is a lowland river that drains a vast and productive region of central Argentina into the Río de la Plata estuary. To evaluate water quality and the geochemistry of major and trace metals (Fe, Mn, Zn, Cu, Pb, Cr and Ni), water and sediments samples were collected along 500 km of the Salado River basin (n = 21). Waters were highly alkaline (pH: 8.8 ± 0.4), saline (5.2 ± 1.8 mS/cm), turbid (467 ± 237 NTU) and eutrophic (chlorophyll a: 187 ± 119 µg/l) with a decreasing gradient towards the river mouth reflecting the contribution of alkaline ground waters and eutrophication at the river head. Suspended particles (70–595 mg/l) were enriched in total organic carbon, nitrogen (5–7 times) and metals (1–4 times) relative to bed sediments, but metal concentrations were 2–10 times below the world river’s average. Consistently, metal concentrations in bed sediments were lower than sediment quality guidelines with an increasing downriver trend following the enrichment of clays. The enrichment factors (EF) and geoaccumulation index (Igeo), calculated with local background metal levels from the deepest layers of a dated sediment core, indicate a general prevalence of natural metal sources (EF < 1.5) with unpolluted sediments (Igeo ≤ 0), excepted for the Chivilcoy stream, which showed a significant enrichment of Zn, Cu and Pb (EF = 2–12; 0 ≤ Igeo ≤ 1) constituting a clear pollution hot spot in the basin.
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References
Bazurri ME, Gabellone NA, Solari LC (2018) The effects of hydraulic works and wetlands function in the Salado-River basin (Buenos Aires, Argentina). Environ Monit Assess 190:99. https://doi.org/10.1007/s10661-017-6448-7
Bull ID, Lockheart MJ, Elhmmali MM, Roberts DJ, Evershed RP (2002) The origin of faeces by means of biomarker detection. Environment Int 27:647–654. https://doi.org/10.1016/s0160-4120(01)00124-6
Carol ES, Braga F, Kruse EE, Tosi L (2014) A retrospective assessment of the hydrological conditions of the Samborombón coastland (Argentina). Ecol Eng 67:223–237. https://doi.org/10.1016/j.ecoleng.2014.03.081
CCME (2001) Canadian sediment quality guidelines for the protection of aquatic life: Summary tables. In: Canadian environmental quality guidelines, 1999, Canadian Council of Ministers of the Environments, Winnipeg
Conzonno V, Miretzky P, Fernández Cirelli A (2001) The impact of man-made hydrology on the lower stream bed of the Salado River drainage basin (Argentina). Environ Geol 40:968–972. https://doi.org/10.1007/s002540100264
Devesa-Rey R, Díaz-Fierros F, Barral MT (2009) Normalization strategies for river bed sediments: a graphical approach. Microchem J 91:253–265. https://doi.org/10.1016/j.microc.2008.12.004
Gabellone NA, Claps MC, Solari LC, Neschuk NC (2005) Nutrients, conductivity and plankton in a landscape approach to a Pampean saline lowland river (Salado River, Argentina). Biogeochemistry 75:455–477. https://doi.org/10.1007/s10533-005-3273-9
Gabellone NA, Solari L, Claps M, Neschuk N (2008) Chemical classification of the water in a lowland river basin (Salado River, Buenos Aires, Argentina) affected by hydraulic modifications. Environ Geol 53:1353–1363. https://doi.org/10.1007/s00254-007-0745-3
Gabellone NA, Claps M, Solari L, Neschuk N, Ardohain DM (2013) Spatial and temporal distribution pattern of phosphorus fractions in a saline lowland river with agricultural land use (Salado River, Buenos Aires, Argentina). Fundam Appl Limnol 183(4):271–286. https://doi.org/10.1127/1863-9135/2013/0499
Heguilor S, Speranza ED, Astoviza MJ, Migoya MC, Skorupka CN, Colombo JC (2019) Sterols in suspended particulate matter and sediments from the Salado River basin (Buenos Aires). In: Actas de la V Reunión Argentina de Geoquímica de la Superficie, La Plata, Buenos Aires
Hseu ZY, Chen ZS, Tsui CC, Tsai CC, Tsaui CC, Cheng SF, Liu CL, Lin HT (2002) Digestion methods for total heavy metals in sediments and soils. Water Air Soil Pollut 141:189–205. https://doi.org/10.1023/A:1021302405128
Müller G (1969) Index of geoaccumulation in sediments of the Rhine River. GeoJournal 2:108–118
Quirós R, Drago E (1999) The environmental state of Argentinean lakes: an overview. Lakes Reserv Res Manage 4:55–64. https://doi.org/10.1046/j.1440-1770.1999.00076.x
Schuerch M, Scholten J, Carretero S, García-Rodríguez F, Kumbier K, Baechtiger M, Liebetrau V (2016) The effect of long-term and decadal climate and hydrology variations on estuarine marsh dynamics: an identifying case study from the Río de la Plata. Geomorphology 269:122–132. https://doi.org/10.1016/j.geomorph.2016.06.029
Strickland JDH, Parsons TR (1972) A practical handbook of seawater analysis, 2nd edn. Fisheries Research Board of Canada, Ottawa
Tatone L, Bilos C, Skorupka C, Colombo JC (2015) Trace metal behavior along fluvio-marine gradients in the Samborombón Bay, outer Río de la Plata estuary, Argentina. Cont Shelf Res 96:27–33. https://doi.org/10.1016/j.csr.2015.01.007
Tatone L, Skorupka C, Colombo JC (2020) Comprehensive evaluation of metal pollution and ecological risk in settling material from differently impacted sites in the Río de la Plata basin. Hum Ecol Risk Assess. https://doi.org/10.1080/10807039.2020.1749826
Thornton SF, McManus J (1994) Applications of organic carbon and nitrogen stable isotope and C/N ratios as source indicators of organic matter provenance in estuarine systems: evidence from the Tay estuary, Scotland. Estuar Coast Shelf S 38:219–233. https://doi.org/10.1006/ecss.1994.1015
Viers J, Dupré B, Gaillardet J (2009) Chemical composition of suspended sediments in World Rivers: new insights from a new database. Sci Total Environ 407:853–868. https://doi.org/10.1016/j.scitotenv.2008.09.053
Walling DE, Moorehead PW (1989) The particle size characteristics of fluvial suspended sediment: an overview. Hydrobiologia 176(177):125–149. https://doi.org/10.1007/978-94-009-2376-8_12
Wetzel RG (2001) Limnology: lake and rives ecosystems, 3rd edn. Academic Press, San Diego
Wu Y, Zhang J, Liu SM, Zhang ZF, Yao QZ, Hong GH, Cooper L (2007) Sources and distribution of carbon within the Yangtze River system. Estuar Coast Shelf S 71:13–25. https://doi.org/10.1016/j.ecss.2006.08.016
Acknowledgements
This work was supported by “SIMPARH—Sistema Inteligente de Monitoreo, Prevención y Análisis de Riesgos Hidrometeorológicos en la Provincia de Buenos Aires” (RESOL-2018-188- GDEBA-CICMCTI; IF-2018-4600632-GDEBA-DGCCIC). L.M. Tatone and E.D. Speranza are members of the Scientific Research Career of the Argentinean National Scientific and Technical Research Council (CONICET). S. Heguilor is a CONICET scholar. J.C. Colombo is member of the Scientific Research Career of the Buenos Aires Scientific Research Commission (CIC).
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Tatone, L.M., Heguilor, S., Speranza, E.D. et al. Metal geochemistry in suspended and bed sediments in the eutrophic lowland Salado River basin (Buenos Aires, Argentina). Environ Earth Sci 80, 340 (2021). https://doi.org/10.1007/s12665-021-09624-4
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DOI: https://doi.org/10.1007/s12665-021-09624-4