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Applied Sciences
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Advances in Pollutant Removal from Water Environments
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Advances in Pollutant Removal from Water Environments

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Environmental Sciences".

Deadline for manuscript submissions: 31 May 2025 | Viewed by 3247

Special Issue Editor

Dr. Shejiang Liu

E-Mail Website
Guest Editor
School of Environmental Science and Engineering, Tianjin University, Tianjin 300354, China
Interests: water pollution control; groundwater pollution control; solid-waste resource treatment; anaerobic biological drying pretreatment technology; soil remediation; soil heavy metal pollution
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In order to meet the needs of humans, ecosystems, and the environment, the quality and quantity of available water are equally important. However, the rapid development of industry and agriculture in the world has caused serious levels of water pollution. At the same time, the increase in population has led to shortages of water resources. According to the statistics, 80% of wastewater in the world is discharged into the environment without purification or treatment. At present, the environmental pollution of water is usually caused by various factors such as industrial wastewater, agricultural discharge, urban domestic sewage, solid waste, and mine discharge. Water pollution seriously affects human health, ecosystems, and socioeconomic development, which is why the treatment of water environmental pollution has become a major issue. The increasing attention paid to water pollution treatment and environmental pollutant remediation has prompted people to explore effective strategies for eliminating wastewater pollution and generating clean energy. Overall, the aim of this Special Issue is to provide original research and review articles on the removal of environmental pollutants from water, as well as to share new progress in this field.

Potential topics include, but are not limited to, the following:

  • Current status and development prospects of pollutant removal technologies;
  • Removal of organic pollutants;
  • Removal of heavy metal pollutants;
  • Removal of microbial pollutants;
  • Removal of solid suspended particulate pollutants;
  • Removal of drug pollutants;
  • Removal of microplastic pollutants;
  • Removal of nutrients (such as nitrogen and phosphorus).

Dr. Shejiang Liu
Guest Editor

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. Applied Sciences 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 2400 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

  • pollutant removal
  • water pollution control
  • organic pollutants
  • pollutant remediation

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

20 pages, 4391 KiB  
Article
Microplastic Retention in Secondary Sewage Sludge: Characterization and Influence of Solid Concentration
by Claudio Casella, Daniel Sol, Adriana Laca and Mario Díaz
Appl. Sci. 2025, 15(7), 3557; https://doi.org/10.3390/app15073557 - 25 Mar 2025
Viewed by 516
Abstract
The majority of microplastics (MPs) removed from urban wastewater during conventional treatments end up in sewage sludge (around 95%). There are not many studies focused on the retention of MPs in secondary sewage sludge. This study explores the amount and kind of MPs [...] Read more.
The majority of microplastics (MPs) removed from urban wastewater during conventional treatments end up in sewage sludge (around 95%). There are not many studies focused on the retention of MPs in secondary sewage sludge. This study explores the amount and kind of MPs retained in secondary sludge from a municipal wastewater treatment plant (WWTP) and the factors affecting the entrapment of MPs within the sludge flocs. The most abundant MPs in the sludges were fibres (61%), and the majority were within the size range of 250–500 μm. In addition, the effect of solid concentration on MP retention in settled sludge was analysed by carrying out a mixing–settling test. Without the addition of any chemicals, a maximum MP retention efficacy of 63% was obtained for a total suspended solids (TSS) concentration of 5.33 g/L. The effect of adding FeCl3 and non-ionic polyacrylamide (PAM) was also investigated, and the percentage of retained MPs increased to values of 82% and 70%, respectively (with only 0.63 g TSS/L). This improvement occurred predominantly in the case of fibres. The results suggest the possibility of adding chemicals before the secondary settling stage as a means of reducing MP contamination in treated water. Full article
(This article belongs to the Special Issue Advances in Pollutant Removal from Water Environments)
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34 pages, 8828 KiB  
Article
Leveraging the Potential of In Situ Green-Synthesized Zero-Valent Iron Nanoparticles (nZVI) for Advanced Oxidation of Clinical Dyes in Water
by María F. Alexandre-Franco, Cristina Rodríguez-Rasero, Ana González-Trejo, Mireya Casas-Pulido, Carmen Fernández-González and Eduardo M. Cuerda-Correa
Appl. Sci. 2024, 14(15), 6558; https://doi.org/10.3390/app14156558 - 26 Jul 2024
Cited by 1 | Viewed by 2088
Abstract
Nanotechnology, a rapidly growing field, holds tremendous promise as it harnesses the unique properties and applications of nanoparticulate materials on a nanoscale. In parallel, the pressing global environmental concerns call for the development of sustainable chemical processes and the creation of new materials [...] Read more.
Nanotechnology, a rapidly growing field, holds tremendous promise as it harnesses the unique properties and applications of nanoparticulate materials on a nanoscale. In parallel, the pressing global environmental concerns call for the development of sustainable chemical processes and the creation of new materials through eco-friendly synthesis methods. In this work, zero-valent iron nanoparticles (nZVI) were synthesized using an innovative and environmentally friendly approach as an alternative to conventional methods. This method leverages the antioxidant capacity of natural plant extracts to effectively reduce dissolved metals and produce nZVI. The chosen extract of green tea plays a pivotal role in this process. With the extract in focus, this study delves into the remarkable capability of nZVI in degrading two dyes commonly used in medicine, chrysoidine G and methylene blue, in aqueous solutions. Additionally, Fenton-type oxidation processes are explored by incorporating hydrogen peroxide into the nanoparticle mixture. By applying the statistical design of experiments and Response Surface Methodology, the influence of four key parameters—initial concentrations of Fe2+, Fe3+, H2O2, and polyphenols—on dye elimination efficiency in aqueous solutions is thoroughly analyzed. The obtained results demonstrate that advanced oxidation technologies, such as Fenton-type reactions in conjunction with nanoparticles, achieve an excellent efficiency of nearly 100% in eliminating the dyes. Moreover, this study reveals the synergistic effect achieved by simultaneously employing nZVI and the Fenton process, showcasing the potential for further advancements in the field. Full article
(This article belongs to the Special Issue Advances in Pollutant Removal from Water Environments)
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