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Dear Colleagues,

In recent years, the migration, transformation and fate of emerging pollutants in the environment and their impact on the ecosystem have become the focus of global environmental science. In order to further promote research on the environmental processes of emerging pollutants, we have initiated this Special Issue.

This Special Issue, entitled "Environmental Processes, Ecotoxicity and Treatment of Emerging Pollutants", aims to collect research papers on the behavior, toxic effects and control strategies of emerging pollutants such as antibiotics, endocrine disruptors, microplastics, perfluorinated compounds and other persistent organic pollutants in the environment. Research areas include, but are not limited to, the environmental processes, ecotoxicological effects, risk assessment and related treatment processes of emerging pollutants in environmental media such as water, soil and the atmosphere.

We welcome the following types of submissions:

Studies on the adsorption behavior, photochemical transformation, and biotransformation of emerging pollutants in the environment.
Ecotoxicological effects and risk assessment of emerging pollutants.
Research on chemical and other treatment processes for emerging pollutants.

Dr. Ruijuan Qu
Prof. Dr. Zunyao Wang
Guest Editors

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. Toxics 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 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

emerging pollutants
environmental processes
ecotoxicity
treatment

Published Papers (2 papers)

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Research

19 pages, 4557 KiB

Open AccessArticle

Ecotoxicological Properties of Pure and Phosphorus-Containing Graphene Oxide Bidimensional Sheets in Daphnia magna

by F. Mendoza-Villa, Noemi-Raquel Checca-Huaman, Tainara L. G. Costa, Jair C. C. Freitas and Juan A. Ramos-Guivar

Toxics 2024, 12(4), 252; https://doi.org/10.3390/toxics12040252 - 29 Mar 2024

Viewed by 525

Abstract

In this work, the synthesis and structural, thermal, vibrational, morphological, and electronic characterization of 2D-like pure graphene oxide (GO) and phosphorus-containing graphene oxide (GOP) sheets were investigated. The average thicknesses of GO and GOP were 0.8 μm and 3.1 μm, respectively. The electron energy-loss spectroscopy spectra were used to analyze the differences in the C-K and O-K energy edge bands between GO and GOP. In addition, colloidal stability was studied using dynamic light scattering and zeta potential physicochemical techniques, determining that as the concentration increases, the hydrodynamic diameter and electrostatic stability of GO and GOP increase. The colloidal stability was quite important to ensure the interaction between the suspended solid phase and the biomarker. The 2D-like materials were used to determine their ecotoxicological properties, such as the medium lethal concentration, a crucial parameter for understanding ecotoxicity. Acute ecotoxicity experiments (24 h) were conducted in triplicate to obtain robust statistics, with corresponding mean lethal concentration (

L C_{50}

) of 11.4 mg

L^{- 1}

and 9.8 mg

L^{- 1}

for GO and GOP, respectively. The morphological parameters of GO and GOP were compared with a negative control. However, only the case of GO was analyzed, since the Daphnia magna (D. magna) set exposed to GOP died before completing the time required for morphological analysis. The results indicate that the GOP sample is more toxic than the GO, both during and after exposure. Furthermore, the morphological parameters with the greatest statistically significant changes (

p < 0.05

) were associated with the heart and body, while the eye and tail showed less significant changes. Full article

(This article belongs to the Special Issue Environmental Processes, Ecotoxicity and Treatment of Emerging Pollutants)

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17 pages, 2021 KiB

Open AccessArticle

Ecotoxicological Characterization of Lithium as a “Timebomb” in Aquatic Systems: Tadpoles of the South American Toad Rhinella arenarum (Hensel, 1867) as Model Organisms

by Paola M. Peltzer, Ana P. Cuzziol Boccioni, Andrés M. Attademo, María F. Simoniello, Germán Lener and Rafael C. Lajmanovich

Toxics 2024, 12(3), 176; https://doi.org/10.3390/toxics12030176 - 25 Feb 2024

Viewed by 2515

Abstract

The aim of this study was to evaluate the acute lethality and chronic sublethal effects of lithium (Li) on Rhinella arenarum tadpoles as model organisms. First a 96 h toxicity assay was performed by exposing tadpoles to Li concentrations from 44.08 to 412.5 mg L⁻¹ to estimate the mortality, and lethal and sublethal effects. Another bioassay was carried out by exposing tadpoles to two environmentally relevant Li concentrations (2.5 and 20 mg L⁻¹) for one and two weeks. The sublethal effects of Li on tadpoles were evaluated by analyzing biochemical, genotoxic, and physiological biomarkers. The mortality in Li-exposed tadpoles increased over time. The median lethal concentration (LC₅₀) ranged from 319.52 (281.21–363.05) mg L⁻¹ at 48 h to 66.92 (52.76–84.89) mg L⁻¹ at 96 h. Exposure to Li at 2.5 and 20 mg L⁻¹ induced alterations in enzymes related to detoxification, antioxidant, and hepatic mechanisms, endocrine disruption of thyroid hormones, genotoxicity, and effects on the physiology of the heart and gastrointestinal systems. Tadpoles exposed to the highest concentration in the chronic bioassay (20 mg L⁻¹ Li), which is the concentration commonly recorded in Li mining sites, showed significant mortality after one week of exposure. These results warn about the high ecotoxicological risk of Li as a contaminant of emerging concern for amphibians. Full article

(This article belongs to the Special Issue Environmental Processes, Ecotoxicity and Treatment of Emerging Pollutants)

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