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Residues of Organic Pollutants in Environmental Samples, 2nd Edition

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Analytical Chemistry".

Deadline for manuscript submissions: closed (31 May 2024) | Viewed by 2419

Special Issue Editor


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Guest Editor
Department of Analytical and Applied Chemistry, School of Engineering, Institut Químic de Sarrià-Universitat Ramon Llull, Via Agusta 390, 08017 Barcelona, Spain
Interests: environmental chemistry; emerging contaminants; analytical chemistry; environmental omics; mass spectrometry
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Special Issue Information

Dear Colleagues,

This Special Issue is a continuation of a previous Special Issue entitled “Residues of Organic Pollutants in Environmental Samples” (https://www.mdpi.com/journal/molecules/special_issues/Residues_Organic_Pollutants), following its success.

Environmental pollution is an environmental concern related to the emission and dispersion of various chemical compounds from largely human activities that decrease the ecological function of aquatic habitats; also, in some cases, it leads to disease and mortality. In the last few years, a new class of contaminants has appeared. Called “Emerging Organic Contaminants” (EOCs), they are defined as natural or synthetically occurring substances that are not commonly monitored in the environment but can induce known or suspected undesirable effects on humans and ecosystems. EOCs are not necessarily newly developed compounds; they may have been present in the environment for a long time, but their presence and implications for the environment's integrity have only been recognized recently. Advances in the sensitivity of analytical techniques have played an important role in the detection of EOCs at very low concentrations in environmental matrices. EOCs include different chemical classes of pollutants, such as disinfectants, pharmaceuticals and personal care products (PPCPs), detergents, endocrine disruptors, among others. All researchers working in these emerging and promising fields of research are strongly encouraged to submit their original works for publication in this Special Issue of Molecules. It is important to note that the issue of microplastic pollution is a critical and growing problem that falls within the scope of EOCs and deserves special attention in environmental research and management.

Dr. Cristian Gomez-Canela
Guest Editor

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Keywords

  • environmental pollution
  • emerging organic contaminants
  • chromatography
  • mass spectrometry
  • environmental samples
  • water pollution
  • aquatic toxicity
  • environmental risk assessment
  • emissaries

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Published Papers (2 papers)

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Research

22 pages, 3540 KiB  
Article
Long-Term Polyethylene (Bio)Degradation in Landfill: Environmental and Human Health Implications from Comprehensive Analysis
by Vladyslav Redko, Lidia Wolska, Ewa Olkowska, Maciej Tankiewicz and Monika Cieszyńska-Semenowicz
Molecules 2024, 29(11), 2499; https://doi.org/10.3390/molecules29112499 - 25 May 2024
Viewed by 954
Abstract
This study investigates the process of long-term (bio)degradation of polyethylene (PE) in an old municipal waste landfill (MWL) and its implications for environmental and human health. Advanced techniques, such as ICP–ES/MS and IC–LC, were used to analyze heavy metals and anions/cations, demonstrating significant [...] Read more.
This study investigates the process of long-term (bio)degradation of polyethylene (PE) in an old municipal waste landfill (MWL) and its implications for environmental and human health. Advanced techniques, such as ICP–ES/MS and IC–LC, were used to analyze heavy metals and anions/cations, demonstrating significant concentration deviations from control samples. The soil’s chemical composition revealed numerous hazardous organic compounds, further indicating the migration of additives from PE to the soil. Toxicological assessments, including Phytotoxkit FTM, Microtox® bioassay, and Ostracodtoxkit®, demonstrated phytotoxicity, acute toxicity, and high mortality in living organisms (over 85% for Heterocypris Incongruens). An unusual concentration of contaminants in the MWL’s middle layers, linked to Poland’s economic changes during the 1980s and 1990s, suggests increased risks of pollutant migration, posing additional environmental and health threats. Moreover, the infiltration capability of microorganisms, including pathogens, into PE structures raises concerns about potential groundwater contamination through the landfill bottom. This research underscores the need for vigilant management and updated strategies to protect the environment and public health, particularly in older landfill sites. Full article
(This article belongs to the Special Issue Residues of Organic Pollutants in Environmental Samples, 2nd Edition)
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11 pages, 1855 KiB  
Article
Residues of Deltamethrin in Pine Needles and Pine Nuts of Catalonia (Spain)
by Marina Bellot, Anna Teixidó, Antoni Torrell, Neus Aletà and Cristian Gómez-Canela
Molecules 2023, 28(24), 8050; https://doi.org/10.3390/molecules28248050 - 12 Dec 2023
Viewed by 1142
Abstract
In recent years, recurrent droughts have weakened stone pine (Pinus pinea) forests and facilitated the emergence of harmful pests and diseases, including the Leptoglossus occidentalis. The production of stone pine nuts has declined over the past five years. To control [...] Read more.
In recent years, recurrent droughts have weakened stone pine (Pinus pinea) forests and facilitated the emergence of harmful pests and diseases, including the Leptoglossus occidentalis. The production of stone pine nuts has declined over the past five years. To control this hemipteran pest, a synthetic pyrethroid insecticide called deltamethrin is being tested. However, it is necessary to estimate the residue left by these treatments in forest stands. Therefore, a fast and robust analytical procedure was developed based on QuEChERS clean-up extraction, followed by gas chromatography coupled with an electron capture detector. This optimized method can detect residual concentrations of deltamethrin in pine nuts and pine needles up to 0.1 and 6 μg kg−1, respectively, with a limit of quantification of 0.4 and 20 μg kg−1. Great recoveries (between 84 and 102%) were obtained for both matrices, and no matrix effect was observed. The results showed that two weeks after spraying, the deltamethrin content in the needles of stone pines decreased by up to 75%, and after nine months, its presence was like that of nontreated trees. Full article
(This article belongs to the Special Issue Residues of Organic Pollutants in Environmental Samples, 2nd Edition)
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