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Emerging Organic Contaminants in Aquatic Systems: A Focus on the Source–Pathway–Receptor–Impact–Mitigation Continuum

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

Deadline for manuscript submissions: closed (25 August 2023) | Viewed by 6154

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Guest Editor
Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, D-14469 Potsdam, Germany
Interests: water pollution; risk assessment; risk mitigation; ecotoxicology; ecohydrology; hydrochemistry
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Special Issue Information

Dear Colleagues,

Emerging organic contaminants continue to attract public and research attention due to their potential ecological and human health risks. Therefore, it is critical to understand the dissemination, behavior, fate, and health risks of emerging organic contaminants in aquatic systems. This Special Issue calls for high-quality original articles, reviews, perspectives, and opinions on recent advances on emerging organic contaminants in aquatic systems. Particular attention is paid to studies addressing one or more aspects in the source–pathway–receptor–impact–mitigation continuum.

Therefore, the current SI invites papers addressing the following aspects, among others:

  • New classes of emerging organic contaminants, including PFAS;
  • Novel and under-studied sources of emerging organic contaminants;
  • Dissemination, behavior, and fate processes in aquatic systems;
  • Theory and modeling of dissemination, behavior, fate, and health risks of emerging organic contaminants;
  • Impacts of (re)-emerging infections (e.g., COVID-19, monkeypox) on emerging organic contaminants;
  • Novel characterization and detection methods, including in-site techniques;
  • Environmental receptors and health risks on aquatic organisms and humans;
  • Health impacts at various levels of biological organization in aquatic systems; (e.g., molecular, individuals, population, community, trophic interactions, ecosystem services, and benefits);
  • Novel and emerging mitigation methods, including photocatalysis, advanced oxidation processes, and nanotechnology;
  • Socio-economic, cultural and policy aspects of emerging organic contaminants;
  • Application of emerging tools such as genomics, data analytics, and advanced analytical methods.

Prof. Dr. Willis Gwenzi
Guest Editor

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Keywords

  • pharmaceuticals
  • personal care products
  • plasticizers
  • surfactants
  • flame retardants
  • endocrine-disrupting chemicals
  • gasoline additives
  • per- and polyfluoroalkyl substances (PFAS)
  • occurrence
  • detection methods
  • dissemination pathways
  • fate
  • persistence
  • behavior
  • environmental receptors
  • (bio)transformation
  • exposure pathways
  • ecological health risks
  • human exposure
  • human health risks
  • mitigation
  • remediation

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Published Papers (1 paper)

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Research

20 pages, 3150 KiB  
Article
Appraisal of the Temporospatial Migration and Potential Ecotoxicity of Phthalic Acid Esters in Municipal Effluents, Rivers and Dam—A Catchment-Wide Assessment
by Ntsako Dellas Baloyi, Memory Tekere, Khumbudzo Walter Maphangwa and Vhahangwele Masindi
Water 2023, 15(11), 2061; https://doi.org/10.3390/w15112061 - 29 May 2023
Viewed by 1756
Abstract
Herein, the catchment-wide temporal dynamics and potential ecotoxicological risk of phthalic acid esters (PAEs) in aquatic ecosystems were assessed. Specifically, water samples were collected for a period of six consecutive months from seven selected sites, i.e., covering both dry and wet seasons for [...] Read more.
Herein, the catchment-wide temporal dynamics and potential ecotoxicological risk of phthalic acid esters (PAEs) in aquatic ecosystems were assessed. Specifically, water samples were collected for a period of six consecutive months from seven selected sites, i.e., covering both dry and wet seasons for seasonal variabilities. The appraised PAEs comprised dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), benzylbutyl phthalate (BBP), diphenyl phthalate (DPP), di-n-hexyl phthalate (DHP), bis(2-ethylhexyl) phthalate (DEHP), di-n-octyl phthalate (DOP), diisodecyl phthalate (DiDP) and diisononyl phthalate (DiNP)) in municipal wastewater effluents, rivers and dam. Their concentrations were quantified using a gas chromatography–flame ionisation detector (GC–FID) via the liquid–liquid extraction mode. The appraised PAEs were ubiquitous in the selected sampling points, with DBP being the most abundant PAE homologue throughout the assessed localities. In particular, quantifiable concentrations were 18.9, 37.9 and 11.5 μg/L for DBP in wastewater effluents, rivers and the dam catchment, respectively, and for overall Σ10PAEs of minimum, mean and maximum of 0.492, 3.6 ± 9.82 and 63.2 μg/L, respectively. In addition, PAE concentrations in the effluents, rivers, and dam samples showed no significant differences with p < 0.05. The overall prominent sequence for ∑PAEs registered: 53.3 > 10.1 > 10.0 > 9.8 > 4.3 > 2.5 > 1.8 > 1.7 > 1.1 > 0.9% for DBP > DEHP > DiDP > DOP > DHP > DPP > BBP > DMP > DEP > DiNP, respectively. The ecotoxicological risk assessment (risk quotient method) showed that DBP and DiDP posed high risk (RQ ≥ 1), and DOP, DEHP, DHP, DiNP and BBP posed median risk to aquatic organisms (0.1 ≤ RQ < 1), while the risk from DMP and DEP was minimal (RQ < 0.1). Additionally, DBP, DEHP, DOP, DPP and DiDP were higher than the water criterion (3 μg/L) of PAEs recommended by the United States Environmental Protection Agency (USEPA) for the protection of aquatic life. Findings from this study should go a long way in guiding regulators, custodians and catchment management forums, along with interested and affected parties, regarding the status and potential ecotoxicological effects of PAEs in the receiving environment. Full article
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