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Aquatic Chemodynamics of Environmental Inorganic Pollutants: Transformation and Transfer Within and Across Various Environmental Compartments

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: 15 March 2026 | Viewed by 592

Special Issue Editor

Prof. Dr. Hong Zhang

E-Mail Website
Guest Editor
Department of Chemistry, Tennessee Tech University (TTU), Cookeville, TN 38505, USA
Interests: water chemistry; soil chemistry; environmental photochemistry; environmental chemistry of mercury and chromium; environmental chemodynamics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Transformation and transfer are two fundamental, consequential processes that govern the fate of pollutants in the environment and thus control environmental quality. Transformation can influence transport, and likewise transfer can control transformation. Moreover, the two processes are coupled intimately and interact significantly with each other in many cases. This makes it even more challenging to observe, describe, understand, model, and predict the fate of environmental pollutants. Chemodynamics is an area of research that comprehensively addresses the transformation and transfer of chemicals and their coupling in the environment. There has been an ongoing, pressing need to consider and handle the two processes synergistically. This need thus calls for a special forum that provides a platform to allow researchers to gather and communicate on the matter. This Special Issue (SI) thus serves as a means to deliver such a platform.

This Special Issue of Water invites manuscripts (research articles, review articles, short communications) that report on the latest or recent original research or review the latest or recent research progress and synthesis in aquatic chemodynamics, focusing more on inorganic pollutants. Special focal points of interest for this SI include the following topics: (1) transformation and/or transfer across various aquatic interfaces such as water/air interface, water/sediment interface, and water/bio−body interface, (2) the coupling/interaction of transformation and transfer, and (3) the transformation and transfer of organic chemicals that can control inorganic pollutants, such as various organic ligands that can form coordination compounds with metal ions. In addition to the focal points, general research on transformation and/or transfer, which is surely part of the entire chemodynamics, is welcomed. Field investigations, laboratory simulation studies, and modeling studies are all invited, allowing us to present the latest research on multi-faceted processes in aquatic chemodynamics.

Prof. Dr. Hong Zhang
Guest Editor

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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. Water is an international peer-reviewed open access semimonthly 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 2600 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 chemodynamics
  • emission
  • global biogeochemical cycle
  • heavy metals
  • lakes
  • oceans
  • photochemical
  • toxin/toxic
  • source/sink
  • water/air exchange
  • water/sediment exchange

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Published Papers (1 paper)

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Research

48 pages, 5238 KB  
Article
Chemodynamics of Mercury (Hg) in a Southern Reservoir Lake (Cane Creek Lake, Cookeville, TN, USA): II—Estimation of the Hg Water/Air Exchange Coefficient Using the Two-Thin Film Model and Field-Measured Data of Hg Water/Air Exchange and Dissolved Gaseous Hg
by Hong Zhang, Lesta S. Fletcher and William C. Crocker
Water 2025, 17(20), 2931; https://doi.org/10.3390/w17202931 - 10 Oct 2025
Viewed by 486
Abstract
This paper reports a novel effort to estimate and evaluate the coefficients of Hg transfer across the water/air interface in lakes such as Cane Creek Lake (CCL, Cookeville, TN, USA). This was accomplished by calculating the coefficients (kw) using the [...] Read more.
This paper reports a novel effort to estimate and evaluate the coefficients of Hg transfer across the water/air interface in lakes such as Cane Creek Lake (CCL, Cookeville, TN, USA). This was accomplished by calculating the coefficients (kw) using the Two-Thin Film (TTF) Model for Hg transfer together with the field-measured data of Hg emission flux (F), dissolved gaseous mercury concentration (DGM), air Hg concentration (Ca), and water temperature for Henry’s coefficient (KH) obtained from a separate field study at the CCL. The daily mean kw values range from 0.045 to 0.21 m h−1, with the min. at 0.0025–0.14 and the max. at 0.079–0.41 m h−1, generally higher for the summer, and from 0.0092 to 0.15, with the min. at 0.0032–0.033 and the max. at 0.017–0.31 m h−1, generally lower for the fall and winter, exhibiting an apparent seasonal trend. The highest kw values occur in August (mean: 0.21, max.: 0.41 m h−1). Our kw results add to and enrich the aquatic interfacial Hg transfer coefficient database and provide an alternative avenue to evaluate and select the coefficients for the TTF Model’s application. The kw results are of value in gaining insights into the Hg transfer actually occurring across the water/air interface under environmental influences (e.g., wind/wave, solar radiation). Our kw results do not show a clear, consistent correlation of kw with wind/wave effect, nor sunlight effect, in spite of some correlations in sporadic cases. Generally, the kw values do not exbibit the trends prescribed by the model sensitivity study. The comparisons of our kw results with those obtained using wind-based transfer models (the Liss/Merlivat Model, the Wanninkhof Model, and the modified linear model) show that they depart from each other. The findings of this study indicate that the TTF Model has limitations and weaknesses. One major assumption of the TTF Model is the equilibrium of the Hg distribution between the air and water films across the water/air interface. The predominant oversaturation of DGM shown by our DGM data evidently challenges this assumption. This study suggests that aquatic interfacial Hg transfer is considerably more complicated, involving a group of factors, more than just wind and wave. Full article
(This article belongs to the Special Issue Aquatic Chemodynamics of Environmental Inorganic Pollutants: Transformation and Transfer Within and Across Various Environmental Compartments)
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