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Biogeochemistry and Quality Assessment of Trace Elements, Carbon, and Nutrients...
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Biogeochemistry and Quality Assessment of Trace Elements, Carbon, and Nutrients in Aquatic Systems

A special issue of International Journal of Environmental Research and Public Health (ISSN 1660-4601). This special issue belongs to the section "Environmental Science and Engineering".

Deadline for manuscript submissions: closed (15 March 2023) | Viewed by 1880

Special Issue Editor

Prof. Dr. Rozane V. Marins

E-Mail Website
Guest Editor
Laboratório de Biogeoquímica Costeira, Instituto de Ciências do Mar, Universidade Federal do Ceará, Fortaleza, CE 60165-081, Brazil
Interests: estuary; phosphorus; mercury; biogeochemistry; trace metals; marine sciences; water discharge; semiarid region; carbon

Special Issue Information

Dear Colleagues,

Aquatic ecosystems are being strongly modified by the intensification of uses of drainage basins, which generates an increase in discharges of contaminants to aquatic environments, impacting ecosystem services and transferring contaminants to the ocean, threatening life under water. This complex situation is worsened in a scenario of climate change and the unsustainable utilization of natural resources. The complexity of the entangled relation among drivers of environmental impacts requires a multidisciplinary approach to understand the complete potential of threats to the renewable resources of aquatic systems, especially a full understanding of the biogeochemical processes that control the mobility, partitioning, bioavailability, and toxicity of trace elements and nutrients, in order to promote consistent environmental assessments. 

Prof. Dr. Rozane V. Marins
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Environmental Research and Public Health is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2500 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • aquatic systems
  • geochemical proxies
  • transfer processes
  • toxicology
  • bioaccumulation
  • geochemical partition
  • hydrodynamics
  • environmental risks
  • eutrophication
  • plastics

Published Papers (1 paper)

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Research

16 pages, 2539 KiB  
Article
Mercury Sources, Emissions, Distribution and Bioavailability along an Estuarine Gradient under Semiarid Conditions in Northeast Brazil
by Victor Lacerda Moura and Luiz Drude de Lacerda
Int. J. Environ. Res. Public Health 2022, 19(24), 17092; https://doi.org/10.3390/ijerph192417092 - 19 Dec 2022
Cited by 2 | Viewed by 1509
Abstract
In the semiarid coast of northeast Brazil, climate change and changes in land use in drainage basins affect river hydrodynamics and hydrochemistry, modifying the estuarine environment and its biogeochemistry and increasing the mobilization of mercury (Hg). This is particularly relevant to the largest [...] Read more.
In the semiarid coast of northeast Brazil, climate change and changes in land use in drainage basins affect river hydrodynamics and hydrochemistry, modifying the estuarine environment and its biogeochemistry and increasing the mobilization of mercury (Hg). This is particularly relevant to the largest semiarid-encroached basin of the region, the Jaguaribe River. Major Hg sources to the Jaguaribe estuary are solid waste disposal, sewage and shrimp farming, the latter emitting effluents directly into the estuary. Total annual emission reaches 300 kg. In that estuary, the distribution of Hg in sediment and suspended particulate matter decreases seaward, whereas dissolved Hg concentrations increase sharply seaward, suggesting higher mobilization at the marine-influenced, mangrove-dominated portion of the estuary, mostly in the dry season. Concentrations of Hg in rooted macrophytes respond to Hg concentrations in sediment, being higher in the fluvial endmember of the estuary, whereas in floating aquatic macrophytes, Hg concentrations followed dissolved Hg concentrations in water and were also higher in the dry season. Animals (fish and crustaceans) also showed higher concentrations and bioaccumulation in the marine-influenced portion of the estuary. The variability of Hg concentrations in plants and sediments agrees with continental sources of Hg. However, Hg fractionation in water and contents in the animals respond to higher Hg availability in the marine-dominated end of the estuary. The results suggest that the impact of anthropogenic sources on Hg bioavailability is modulated by regional and global environmental changes and results from a conjunction of biological, ecological and hydrological characteristics. Finally, increasing aridity due to global warming, observed in northeast Brazil, as well as in other semiarid littorals worldwide, in addition to increased water overuse, augment Hg bioavailability and environmental risk and exposure of the local biota and the tradition of human populations exploiting the estuary’s biological resources. Full article
(This article belongs to the Special Issue Biogeochemistry and Quality Assessment of Trace Elements, Carbon, and Nutrients in Aquatic Systems)
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