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Applied Sciences
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Advances in the Removal of Pollutants in Wastewater
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Advances in the Removal of Pollutants in Wastewater

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

Deadline for manuscript submissions: closed (1 July 2023) | Viewed by 5279

Special Issue Editors

Dr. Nhamo Chaukura

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Guest Editor
Department of Physical and Earth Sciences, Sol Plaatje University, Kimberley 8301, South Africa
Interests: emerging pollutants; environmental remediation; nanomaterials; water treatment
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Alex Kuvarega

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Guest Editor
Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida 1709, South Africa
Interests: advanced oxidation processes; heterogenous catalysis; material synthesis and characterisation; water and wastewater treatment technologies
Prof. Dr. Rangabhashiyam Selvasembian

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Guest Editor
Department of Biotechnology, School of Chemical and Biotechnology, SASTRA University, Thanjavur 613401, Tamilnadu, India
Interests: biomass valorization for energy and environmental applications; bioremediation; biosorption; wastewater treatment; biocatalyst
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The use of nanomaterials for water treatment exploits the desirable properties of nanomaterials, emanating from their small size. The design, synthesis, characterization, and evaluation of nanomaterials for the removal of pollutants in aquatic systems can span a number of disciplines, including chemistry, chemical engineering, artificial intelligence, data analytics, and environmental sciences, among others.

This Special Issue seeks to address recent advances in the following broad topics:

  1. Design, synthesis, and modification of nanomaterials;
  2. Bionanomaterials, synthesis and application in water pollutant removal;
  3. Characterization methods and properties of nanomaterials;
  4. Low-cost nanomaterials for water treatment;
  5. The application of nanocomposites in water treatment;
  6. Integrating adsorption and photocatalysis in water treatment;
  7. The removal of emerging pollutants in water using nanomaterials;
  8. Studying the removal mechanisms of emerging organic pollutants in water;
  9. Nanomaterials for the removal of antibiotics in water;
  10. Nanomaterials for the removal of rare earth metals in water;
  11. Nanomaterials for the removal of antibiotics in water;
  12. Sustainable application of nanomaterials in wastewater treatment;
  13. Antimicrobial resistance in water: the remediation potential of nanomaterials;
  14. Challenges in the use of nanomaterials in wastewater treatment.

Prof. Dr. Nhamo Chaukura
Prof. Dr. Alex Kuvarega
Prof. Dr. Rangabhashiyam Selvasembian
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 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

  • adsorption
  • emerging pollutants
  • mineralization
  • nanocomposites, photodegradation
  • porous materials
  • water remediation

Published Papers (2 papers)

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Research

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17 pages, 2101 KiB  
Article
Photocatalytic Degradation of Methylene Blue Dye by Electrospun Binary and Ternary Zinc and Titanium Oxide Nanofibers
by Beatrix Petrovičová, Zainab Dahrouch, Claudia Triolo, Fabiola Pantò, Angela Malara, Salvatore Patanè, Maria Allegrini and Saveria Santangelo
Appl. Sci. 2021, 11(20), 9720; https://doi.org/10.3390/app11209720 - 18 Oct 2021
Cited by 10 | Viewed by 1996
Abstract
Synthetic dyes, dispersed in water, have harmful effects on human health and the environment. In this work, Ti and/or Zn oxide nanofibers (NFs) with engineered architecture and surface were produced via electrospinning followed by calcination. Calcination and subsequent cooling were operated at fast [...] Read more.
Synthetic dyes, dispersed in water, have harmful effects on human health and the environment. In this work, Ti and/or Zn oxide nanofibers (NFs) with engineered architecture and surface were produced via electrospinning followed by calcination. Calcination and subsequent cooling were operated at fast rates to generate porous NFs with capture centers to reduce the recombination rate of the photogenerated charges. After morphological and microstructural characterisation, the NFs were comparatively evaluated as photocatalysts for the removal of methylene blue from water under UV irradiation. The higher band gap and lower crystallinity were responsible for the lower photocatalytic activity of the ternary oxides (ZnTiO3 and Zn2TiO4) towards the degradation of the dye. The optimal loads of the highly performing binary oxides were determined. By using 0.66 mg mL−1 wurtzite ZnO for the discoloration of an aqueous solution with a dye concentration of 15 µM, a higher rate constant (7.94 × 10−2 min−1) than previously reported was obtained. The optimal load for anatase TiO2 was lower (0.33 mg mL−1). The corresponding rate constant (1.12 × 10−1 min−1) exceeds the values reported for the commonly used P25–TiO2 benchmark. The catalyst can be reused twice without any regeneration treatment, with 5.2% and 18.7% activity decrease after the second and third use, respectively. Full article
(This article belongs to the Special Issue Advances in the Removal of Pollutants in Wastewater)
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Review

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15 pages, 3826 KiB  
Review
A Review on Carbon Quantum Dots Modified g-C3N4-Based Photocatalysts and Potential Application in Wastewater Treatment
by Shilpa Patial, Sonu, Anita Sudhaik, Naresh Chandel, Tansir Ahamad, Pankaj Raizada, Pardeep Singh, Nhamo Chaukura and Rangabhashiyam Selvasembian
Appl. Sci. 2022, 12(21), 11286; https://doi.org/10.3390/app122111286 - 07 Nov 2022
Cited by 18 | Viewed by 2128
Abstract
Carbon quantum dots (CDs) are a fascinating class of carbon nanomaterials (less than 10 nm in size) with unique optical, electrical, and physicochemical properties. In addition to these properties, CQDs exhibit the desired advantages of aqueous stability, low toxicity, high surface area, economic [...] Read more.
Carbon quantum dots (CDs) are a fascinating class of carbon nanomaterials (less than 10 nm in size) with unique optical, electrical, and physicochemical properties. In addition to these properties, CQDs exhibit the desired advantages of aqueous stability, low toxicity, high surface area, economic feasibility, chemical inertness, and highly tunable photoluminescence behaviour. Recently, graphitic carbon nitride (g-C3N4) has appeared as one of the required stable carbon-based polymers due to its varied applications in several fields. In this regard, modification strategies have been made in the g-C3N4 semiconductor using CQDs to enhance the adsorptive and photocatalytic activity. In comparison to other semiconductor quantum dots, g-C3N4 shows strong fluorescent properties, such as wide excitation spectra, photostability, and tunable photo-luminescent emission spectra. The interaction inside this multicomponent photocatalyst further promotes the photocatalytic activity by improving charge transference, which plays a vital role in electrochemistry. Therefore, CQDs are auspicious nanomaterials in the field of photocatalysis, wastewater treatment and water adsorption treatment. This particular article featured the recent progression in the field of CDs/g-C3N4-based photocatalysts focusing on their luminescent mechanism and potential applications in wastewater treatment. Full article
(This article belongs to the Special Issue Advances in the Removal of Pollutants in Wastewater)
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