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Coatings
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Advanced Coated Nanoparticles in Environmental Systems: Stability, Interactions, and Implications
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Advanced Coated Nanoparticles in Environmental Systems: Stability, Interactions, and Implications

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Environmental Aspects in Colloid and Interface Science".

Deadline for manuscript submissions: 31 July 2026 | Viewed by 1871

Special Issue Editors

Dr. Analía Ale

E-Mail Website
Guest Editor
Cátedra de Toxicología, Farmacología y Bioquímica Legal, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (FBCB-UNL), CONICET, Santa Fe, Argentina
Interests: nanotoxicology; nano-ecotoxicology; aquatic organisms; stress-related biomarkers
Prof. Dr. José Maria Monserrat

E-Mail Website
Guest Editor
Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande (FURG), Programa de Pós-graduação em Ciências Fisiológicas (PPGCF), Rio Grande, RS, Brazil
Interests: aquatic toxicology; nanotoxicology; aquaculture; chemoprotection
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanoparticles (NP) have gained importance due to their multiple applications and novel synthesis methods, ranging from conventional approaches to eco-friendly alternatives. Coatings as stabilizing agents are crucial to maintain the nanometric size of materials and preserve their unique properties. However, different media present new challenges that need to be addressed, such as marine environments with high ionic strength, or freshwater systems with high organic matter concentrations, variable pH, and the presence of other biological components such as algae, which will inevitably influence particle persistence and/or transformations in the release medium.

The ultimate efficiency of NP applications—whether in environmental remediation, agriculture, biomedicine, or industrial processes—depends on how effective the coating strategies are under varying conditions. Furthermore, these coated NP will eventually reach natural environments and may affect the associated biota, such as microcrustaceans, molluscs, and fish. Therefore, there is a need to advance our understanding of particle stabilization strategies, innovative coating technologies, and characterization methods that include realistic media, while elucidating their environmental fate and potential ecotoxicological effects across aquatic ecosystems with diverse physicochemical characteristics.

This Special Issue aims to generate novel information on NP stability in different exposure media, with implications for their environmental fate, behavior, and effects on the associated biota.

Dr. Analía Ale
Prof. Dr. José Maria Monserrat
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 250 words) can be sent to the Editorial Office for assessment.

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. Coatings 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

  • stabilizing agents
  • surface coatings
  • aquatic organisms
  • freshwater
  • marine
  • synthesis methods
  • particle characterization
  • intrinsic properties
  • nanotoxicology
  • environmental fate

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Published Papers (3 papers)

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17 pages, 3521 KB  
Article
Screening Aminated Fibrous Sorbents for Indoor CO2 Removal: Pore-Engineered PEI-Loaded Activated Carbon Fibre Felts
by Muyao He, Liyan Tao and Yile Chen
Coatings 2026, 16(6), 646; https://doi.org/10.3390/coatings16060646 - 26 May 2026
Viewed by 217
Abstract
Solid amine adsorbents can capture CO2 at indoor-relevant concentrations (~1000 ppm), but many high-capacity adsorbents rely on granular or powdery supports that are difficult to integrate directly into air purification systems. Here, we applied three amination strategies to commercial fibrous substrates: bridge-grafting [...] Read more.
Solid amine adsorbents can capture CO2 at indoor-relevant concentrations (~1000 ppm), but many high-capacity adsorbents rely on granular or powdery supports that are difficult to integrate directly into air purification systems. Here, we applied three amination strategies to commercial fibrous substrates: bridge-grafting on viscose (TEPA-AMVF), direct grafting on polyacrylonitrile (TEPA-PAN), and physical impregnation on pore-engineered activated carbon fibre felt (PEI-ACF). These adsorbents were systematically screened under simulated indoor conditions (1000 ppm CO2, 27 °C, 50% RH). A significant capacity difference was observed: TEPA-AMVF (24.8 mg g−1) < TEPA-PAN (35.8 mg g−1) ≪ PEI-ACF (97.0 mg g−1). The superior performance of PEI-ACF was attributed to KOH activation, which produced a mesopore-rich structure (average pore diameter 26.1 nm at an optimal KOH/carbon ratio of 1.25) and enabled high nominal amine utilisation (0.19 mmol CO2 mmol N−1). PEI-ACF maintained high breakthrough-derived CO2 uptake across realistic indoor conditions (64.2–118.6 mg g−1 over 0%–100% RH; 71.6–124.5 mg g−1 over 400–5000 ppm CO2), exhibited rapid kinetics (pseudo-first-order rate constant k = 1.77 h−1; 81.7% of equilibrium uptake within 1 h), and showed stable but partial regeneration over four adsorption–desorption cycles at 60–70 °C under N2. Compared with granular or resin-based amine sorbents, the self-supporting PEI-ACF felt is expected to offer practical advantages for filter-integrated CO2 removal, including mechanical integrity under airflow, reduced risk of particle leakage, and compatibility with HVAC filter slots. Remaining challenges include direct pressure-drop validation, operation in O2-containing indoor air, long-term cycling, and management of CO2 released during regeneration. Full article
(This article belongs to the Special Issue Advanced Coated Nanoparticles in Environmental Systems: Stability, Interactions, and Implications)
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19 pages, 3671 KB  
Article
Quantitative Detection of Copper Ions in Water via Feature-Level Fusion of UV-Vis Absorption and Fluorescence Spectra with Optimized XGBoost
by Meng Zhang, Jikun Shen, Ju Tang, Tianqi Xu, Wu Xu, Fan Zhang, Guo Chen and Chengjiang Zhou
Coatings 2026, 16(5), 531; https://doi.org/10.3390/coatings16050531 - 29 Apr 2026
Viewed by 407
Abstract
In response to the increasingly severe issue of heavy metal pollution in water, this paper proposes a method for the robust quantitative analysis of copper ions in purified water and real water samples based on the feature-level fusion of ultraviolet-visible absorption (UV-Vis) spectra [...] Read more.
In response to the increasingly severe issue of heavy metal pollution in water, this paper proposes a method for the robust quantitative analysis of copper ions in purified water and real water samples based on the feature-level fusion of ultraviolet-visible absorption (UV-Vis) spectra and fluorescence spectra, combined with the Extreme Gradient Boosting (XGBoost) algorithm. Specifically, this study introduces a feature-level fusion strategy to overcome the limitations of single-spectrum detection, while the optimized XGBoost algorithm is employed to model the complex non-linear relationships that are difficult to capture using traditional linear regression methods. An optimization algorithm is introduced to fine-tune the model’s hyperparameters, thereby enhancing its predictive performance. Using the coefficient of determination (R2) and root mean square error (RMSE) as evaluation metrics, rapid and accurate detection of copper ions in water is achieved. Experimental results show that, for standard solutions, the optimized XGBoost model achieves a coefficient of determination of 0.9915 and a root mean square error of 2.6663 mg/L; for actual water samples, the optimized XGBoost model achieved a coefficient of determination of 0.9892 and RMSE of 1.2738 mg/L. This demonstrates the model’s strong generalization ability in overcoming the physical limitations of optical probes. This method effectively identifies and quantifies copper ions in water samples, demonstrating good accuracy and stability. Full article
(This article belongs to the Special Issue Advanced Coated Nanoparticles in Environmental Systems: Stability, Interactions, and Implications)
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12 pages, 2080 KB  
Article
In Vivo Toxicity of Silver Nanoparticles in the Marine Rotifer Brachionus plicatilis: Integrating Metabolic Activity and Generation of Reactive Oxygen Species
by Thiago Obiedo Garcia, Analía Ale, Lucas Garcia Da Costa, Matheus de Castro Vieira, Victoria Dos Santos Monteiro, Martín Frederico Desimone and José María Monserrat
Coatings 2026, 16(2), 152; https://doi.org/10.3390/coatings16020152 - 24 Jan 2026
Viewed by 777
Abstract
Silver nanoparticles (AgNPs) have been widely employed across various industrial, medical, and consumer applications due to their unique biocidal properties, raising concerns about their potential impact on biota such as planktonic microinvertebrates, which, in turn, necessitates the rapid development of in vivo nanotoxicological [...] Read more.
Silver nanoparticles (AgNPs) have been widely employed across various industrial, medical, and consumer applications due to their unique biocidal properties, raising concerns about their potential impact on biota such as planktonic microinvertebrates, which, in turn, necessitates the rapid development of in vivo nanotoxicological bioassays. Here, we combined physicochemical particle characterization with organismal responses to assess the in vivo nanotoxicity of chemically synthesized AgNPs in the marine rotifer Brachionus plicatilis (Ploimida, Brachionidae). Particles were fully characterized by dynamic light scattering (hydrodynamic diameter and polydispersity), zeta potential, transmission electron microscopy, and UV–Vis spectroscopy in both stock and exposure media. Rotifers were exposed to low AgNP concentrations: 0 (control), 2, and 20 µg/L. After a 24 h exposure, in vivo metabolic activity was quantified via resazurin reduction. Reactive oxygen species (ROS) were measured using the fluorescent probe H2DCF-DA (excitation 485 nm, emission 530 nm), quantified by fluorimeter and fluorescence microscopy. Results showed that AgNP exposure decreased ROS levels at both tested concentrations, a finding that can be linked to reduced aerobic metabolic activity in the rotifers. These findings demonstrate that B. plicatilis provides a rapid and sensitive in vivo toxicity assessment that integrates metabolic and ROS endpoints for nano-ecotoxicity evaluations. Full article
(This article belongs to the Special Issue Advanced Coated Nanoparticles in Environmental Systems: Stability, Interactions, and Implications)
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