Special Issue "The Fate and Potential Impacts of Emerging Pollutants on the Freshwater Systems"

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

Deadline for manuscript submissions: 30 December 2021.

Special Issue Editors

Prof. Dr. Lingzhan Miao
E-Mail Website
Guest Editor
Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
Interests: river and lake ecosystems; microbial ecology; ecosystem strcuture and functions; emerging pollutants; microplastics; nanoparticles; toxicity
Dr. Jun Hou
E-Mail Website
Guest Editor
College of Environment, Hohai University, Nanjing 210098, China
Interests: water quality improvement technology; water environment protection and bioremediation; coupling of biofilms and active substrata; ecological engineering; nanomaterials for environmental remediation; environmental behaviors of nanomaterials; toxicity of manufactured nanoparticles
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Currently, there is a rising concern about the presence of emerging pollutants among scientists, regulators, and the society in general, due to the their potential negative effects on aquatic systems. Emerging pollutants include a wide variety of chemicals, such as microplastics, nanomaterials, antibiotics, resistance genes, flame retardants, plasticizers, trace heavy metals, personal care products, endocrine disrupting compounds in general. Freshwaters are particularly vulnerable to pollutants and also other numerous anthropogenic stressors. Most emerging pollutants can be dicharged into freshwaters through different ways: improper disposal, release through domestic wastewater systems, through agriculture and industry or wastewater treatment plants.

Once released in freshwaters, these emerging pollutants are likely to exhibit a series of complex environmental behaviours (suspended or deposited, migration and transformaiton). During their transport, the growth and metabolism of individuals and communities can be affected, which may lead to changes in community structure, species distribution, and ecosystem functions. Research about the source, distribution, fate, and toxicity of emerging pollutants is pivotal for understanding their potential impacts. It is a vital scientific challenge to disentangle the transport and fate of emerging pollutants in freshwaters, as well as their possible effects on macro/micro organisms in the freshwater ecosystem.

The aim of this Special Issue is to bring together recent research and reviews into the fate of emerging pollutants in freshwaters and identifying the factors affecting their distribution and transport, as well as the bioaccumulation, toxicity and the associated risk assessments.  We also encourage the submission of examples of sustainable remediation practices, and research needs, which help to regulate and control emerging pollutants of freshwater ecosystems.

Prof. Dr. Lingzhan Miao
Prof. Dr. Jun Hou
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 papers will be 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. 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 2000 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

  • freshwater ecosystems
  • transport and fate of emerging pollutants
  • microplastics/nanoparticles
  • antibiotic resistance
  • metal/organic pollution
  • bioaccumulation
  • tocixity
  • aquatic species
  • wastewater treatment plants
  • environmental risk assessment

Published Papers (3 papers)

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Research

Article
Nitrate Removal from Actual Wastewater by Coupling Sulfur-Based Autotrophic and Heterotrophic Denitrification under Different Influent Concentrations
Water 2021, 13(20), 2913; https://0-doi-org.brum.beds.ac.uk/10.3390/w13202913 (registering DOI) - 16 Oct 2021
Abstract
Contamination of wastewater with organic-limited nitrates has become an urgent problem in wastewater treatment. The cooperating heterotrophic with sulfur autotrophic denitrification is an alternative process and the efficiency has been assessed in many studies treating simulated wastewater under different operating conditions. However, due [...] Read more.
Contamination of wastewater with organic-limited nitrates has become an urgent problem in wastewater treatment. The cooperating heterotrophic with sulfur autotrophic denitrification is an alternative process and the efficiency has been assessed in many studies treating simulated wastewater under different operating conditions. However, due to the complex and diverse nature of actual wastewater, more studies treating actual wastewater are still needed to evaluate the feasibility of collaborative denitrification. In this study, lab-scale experiments were performed with actual nitrate polluted water of two different concentrations, with glucose and sodium thiosulfate introduced as mixed electron donors in the coupling sulfur-based autotrophic and heterotrophic denitrification. Results showed that the optimum denitrification performance was exhibited when the influent substrate mass ratio of C/N/S was 1.3/1/1.9, with a maximum denitrification rate of 3.52 kg NO3-N/(m3 day) and nitrate removal efficiency of 93% in the coupled systems. Illumina high-throughput sequencing analysis revealed that autotrophic, facultative, and heterotrophic bacteria jointly contributed to high nitrogen removal efficiency. The autotrophic denitrification maintained as the predominant process, while the second most prevalent denitrification process gradually changed from heterotrophic to facultative with the increase of influent concentration at optimum C/N/S ratio conditions. Furthermore, the initiation of dissimilatory nitrate reduction to ammonium (DNRA) was very pivotal in promoting the entire denitrification process. These results suggested that sulfur-based autotrophic coupled with heterotrophic denitrifying process is an alternative and promising method to treat nitrate containing wastewater. Full article
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Article
Characteristics and Sources of Selected Halocarbon and Hydrocarbon Volatile Organic Compounds in Surface Water of the Han River Basin
Water 2021, 13(18), 2568; https://0-doi-org.brum.beds.ac.uk/10.3390/w13182568 - 17 Sep 2021
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Abstract
Volatile organic compounds (VOCs) are ubiquitous pollutants in surface water, which is the main source of drinking water in South Korea. We investigated the behavior (concentration, distribution, and environmental risk) of eleven selected VOCs in the surface water of the Han River tributaries [...] Read more.
Volatile organic compounds (VOCs) are ubiquitous pollutants in surface water, which is the main source of drinking water in South Korea. We investigated the behavior (concentration, distribution, and environmental risk) of eleven selected VOCs in the surface water of the Han River tributaries using purge-and-trap gas chromatography/mass spectrometry. The average concentration of VOCs was 0.29 ± 0.47 μg/L. Chloroform and trichloroethylene (TCE) were the major pollutants, accounting for approximately 64.2% and 25.6% of the total concentration, respectively, and showing that halocarbons accounted for 94%. Chloroform was positively correlated with TCE and xylenes, and TCE was positively correlated with tetrachloroethylene (PCE). No differences were observed in the temporal average concentrations of total VOCs, but the concentrations differed significantly among sub-watershed areas. The Imjin-Hantan River, Han River mainstream, and Anseong Stream watersheds had a high positive association with TCE, whereas the Bukhan and Namhan River watersheds had a strong positive link with chloroform. The contamination and detection frequency of VOCs were highest in industrial complexes, followed by urban and rural areas. Thus, point source pollution significantly contributed to VOC contamination of these tributaries. Risk quotients for most VOCs were <1, suggesting negligible risk. Considering the relatively high occurrence of VOCs and their potential ecological risks, continuous environmental monitoring and study of environmental impacts based on ecotoxicity studies of domestic aquatic species are warranted. Full article
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Article
Identifying Microbial Distribution Drivers of Archaeal Community in Sediments from a Black-Odorous Urban River—A Case Study of the Zhang River Basin
Water 2021, 13(11), 1545; https://0-doi-org.brum.beds.ac.uk/10.3390/w13111545 - 31 May 2021
Viewed by 834
Abstract
Rapid urbanization has destroyed urban water systems and led to blackened and odorous rivers. The heavily polluted rivers are always facing eutrophication and heavy metal pollution, while the combined effects of these environmental factors on the microbial diversity and distribution of the river [...] Read more.
Rapid urbanization has destroyed urban water systems and led to blackened and odorous rivers. The heavily polluted rivers are always facing eutrophication and heavy metal pollution, while the combined effects of these environmental factors on the microbial diversity and distribution of the river microbial communities have not been adequately reported, especially the archaeal communities. In this study, we investigated the community structure and microbial distribution of sediment archaeal communities from an urban blackened and odorous river basin of the Zhang river, in Nanling, China. Results showed that the archaeal community from the eight sediment sites have average values of Shannon and Chao1 at 3.4921 and 232.7202, respectively. The community diversity and richness were different among samples. Halobacterota and Euryarchaeota were the most abundant phylum and Crenarchaeota also took up a considerable amount of the archaeal community. To reveal the main environmental drivers of the distribution of archaeal communities in sediment, the environmental physicochemical factors (total nitrogen, total phosphorus, oxidation/reduction potential, nitrate nitrogen, ammonia nitrogen, pH and total organic carbon) and heavy metals (Cr, Ni, Cu, Zn, As, Cd, Pb and Hg) in sediment were determined. A redundancy analysis (RDA) revealed that Eh was the most prominent influencing factor, and As was the most influential heavy metal on the microbial distribution of archaeal communities. Furthermore, a variance partitioning analysis (VPA) was used to identify the impacts of physicochemical factors and heavy metals on the archaeal community distribution. Results showed that heavy metals have higher effects on archaeal community distribution than physicochemical factors. The present study suggested that the heavy metal pollution should be paid more attention in the microbial distribution in heavily polluted urban rivers, and also should be taken into consideration for improving the efficacies of ecological evaluation and remediation. Full article
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