Evaluation of the Potential Release Tendency of Metals and Metalloids from the Estuarine Sediments: Case Study of Raša Bay

Assessing the environmental quality of coastal systems is important not only for the management and protection of such areas, but also for improving the quality of water resources. Since sediment itself can often be a source of certain toxic elements, in addition to information on the distribution o...

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Autores principales:	Željka Fiket, Marija Petrović, Gordana Medunić, Tatjana Ivošević, Tomislav Fiket, Lizzy Zhang Xu, Yan Wang, Shiming Ding
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	estuarine sediments oxyanions DGT geochemical composition Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/916bae55ebb54823b9b75b7288ae0c9a
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spelling	oai:doaj.org-article:916bae55ebb54823b9b75b7288ae0c9a2021-11-11T18:37:20ZEvaluation of the Potential Release Tendency of Metals and Metalloids from the Estuarine Sediments: Case Study of Raša Bay10.3390/molecules262166561420-3049https://doaj.org/article/916bae55ebb54823b9b75b7288ae0c9a2021-11-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/21/6656https://doaj.org/toc/1420-3049Assessing the environmental quality of coastal systems is important not only for the management and protection of such areas, but also for improving the quality of water resources. Since sediment itself can often be a source of certain toxic elements, in addition to information on the distribution of metals in the water column and in the sediment itself, it is useful to determine the bioavailable forms of individual elements, particularly toxic ones. In this study, water and sediment geochemical data were supplemented with oxyanion mobility in sediments estimated by diffusion gradients in thin film (DGTs). The data obtained indicate that the chemical composition of the water in the Raša River estuary primarily reflects the high input of suspended sediment from the catchment, the mixing of freshwater and seawater, and to a lesser extent the effects of anthropogenic activities. Although sediment composition is primarily determined by geological and hydrodynamic conditions in the catchment, it also indicates moderate enrichment in Co, Cr, Mo and Ni. In contrast, the distribution of oxyanions in sediment pore water indicates the influence of sediment as a source of some elements in the bottom water; e.g., sediment contributes to 40% of the arsenic bottom water budget. The obtained depth profiles of the oxyanion distribution in the sediment pore water indicate an early onset of suboxic to anoxic conditions in Raša Bay, which is prone to rapid sedimentation. All this demonstrates the need to consider the bioavailable forms of elements when assessing environmental quality, as the lack of such information can lead to an incomplete assessment, especially in dynamic coastal systems such as estuaries.Željka FiketMarija PetrovićGordana MedunićTatjana IvoševićTomislav FiketLizzy Zhang XuYan WangShiming DingMDPI AGarticleestuarine sedimentsoxyanionsDGTgeochemical compositionOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6656, p 6656 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	estuarine sediments oxyanions DGT geochemical composition Organic chemistry QD241-441
spellingShingle	estuarine sediments oxyanions DGT geochemical composition Organic chemistry QD241-441 Željka Fiket Marija Petrović Gordana Medunić Tatjana Ivošević Tomislav Fiket Lizzy Zhang Xu Yan Wang Shiming Ding Evaluation of the Potential Release Tendency of Metals and Metalloids from the Estuarine Sediments: Case Study of Raša Bay
description	Assessing the environmental quality of coastal systems is important not only for the management and protection of such areas, but also for improving the quality of water resources. Since sediment itself can often be a source of certain toxic elements, in addition to information on the distribution of metals in the water column and in the sediment itself, it is useful to determine the bioavailable forms of individual elements, particularly toxic ones. In this study, water and sediment geochemical data were supplemented with oxyanion mobility in sediments estimated by diffusion gradients in thin film (DGTs). The data obtained indicate that the chemical composition of the water in the Raša River estuary primarily reflects the high input of suspended sediment from the catchment, the mixing of freshwater and seawater, and to a lesser extent the effects of anthropogenic activities. Although sediment composition is primarily determined by geological and hydrodynamic conditions in the catchment, it also indicates moderate enrichment in Co, Cr, Mo and Ni. In contrast, the distribution of oxyanions in sediment pore water indicates the influence of sediment as a source of some elements in the bottom water; e.g., sediment contributes to 40% of the arsenic bottom water budget. The obtained depth profiles of the oxyanion distribution in the sediment pore water indicate an early onset of suboxic to anoxic conditions in Raša Bay, which is prone to rapid sedimentation. All this demonstrates the need to consider the bioavailable forms of elements when assessing environmental quality, as the lack of such information can lead to an incomplete assessment, especially in dynamic coastal systems such as estuaries.
format	article
author	Željka Fiket Marija Petrović Gordana Medunić Tatjana Ivošević Tomislav Fiket Lizzy Zhang Xu Yan Wang Shiming Ding
author_facet	Željka Fiket Marija Petrović Gordana Medunić Tatjana Ivošević Tomislav Fiket Lizzy Zhang Xu Yan Wang Shiming Ding
author_sort	Željka Fiket
title	Evaluation of the Potential Release Tendency of Metals and Metalloids from the Estuarine Sediments: Case Study of Raša Bay
title_short	Evaluation of the Potential Release Tendency of Metals and Metalloids from the Estuarine Sediments: Case Study of Raša Bay
title_full	Evaluation of the Potential Release Tendency of Metals and Metalloids from the Estuarine Sediments: Case Study of Raša Bay
title_fullStr	Evaluation of the Potential Release Tendency of Metals and Metalloids from the Estuarine Sediments: Case Study of Raša Bay
title_full_unstemmed	Evaluation of the Potential Release Tendency of Metals and Metalloids from the Estuarine Sediments: Case Study of Raša Bay
title_sort	evaluation of the potential release tendency of metals and metalloids from the estuarine sediments: case study of raša bay
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/916bae55ebb54823b9b75b7288ae0c9a
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Evaluation of the Potential Release Tendency of Metals and Metalloids from the Estuarine Sediments: Case Study of Raša Bay

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