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Potential of Nanomaterials for Efficient Wastewater Treatment
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Potential of Nanomaterials for Efficient Wastewater Treatment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 4217

Special Issue Editors

Dr. Meimei Zhou

E-Mail Website
Guest Editor
School of Water and Environment, Chang’an University, Xi'an 710054, China
Interests: nanomaterials; wastewater treatment; photocatalysis
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Xin Zhou

E-Mail Website
Guest Editor
College of Environmental Sciences and Engineering, Taiyuan University of Technology, Taiyuan, China
Interests: advanced wastewater treatment technology; biological nitrogen-removal process; advanced oxidation process; greenhouse gas and emerging pollutants control
Special Issues, Collections and Topics in MDPI journals
Dr. Jing Yang

E-Mail Website
Guest Editor
Department of Environmental Science, East China Normal University, Shanghai, China
Interests: emerging contaminants; multimedia environmental behavior; source apportionment; health risk; screening for non-target contaminants

Special Issue Information

Dear Colleagues,

With rapid industrialization, fast-growing populations and agricultural activities, different pollutants such as heavy metal ions, dyes, drugs, pesticides, radionuclides and pathogenic bacteria are released into water resources, leading to a deterioration of water quality. Water pollution has become a serious concern around the world due to its adverse effects on the environment and human health. At present, it is urgent to develop efficient and sustainable technologies to monitor and remove pollutants in water. Emerging nanotechnology provides the potential for pollutants removal because of the dimensional domain and excellent physicochemical properties of nanomaterials. Newly, various nanomaterials, such as nano particles, nanorods, nanofibers and nano sheets, have been prepared and used to remove pollutants from water. Along with the ongoing research, nanomaterials show increasing potential in the field of water treatment.

The aim of this Special Issue is to collect original research articles and updated literature reviews that reveal the latest advancements in the potential application of nanomaterials in efficient wastewater treatment. Topics include, but are not limited to: nanomaterials, nanocomposites, sustainable nanotechnology, nano device design, and nanofabrication, and their applications in water treatment.

Dr. Meimei Zhou
Prof. Dr. Xin Zhou
Dr. Jing Yang
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. 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 2600 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

  • nanomaterials
  • wastewater treatment
  • nanotechnology
  • nanofiltration
  • photocatalysis
  • advanced wastewater treatment technology

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Published Papers (2 papers)

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Research

15 pages, 8393 KiB  
Article
Visible Light-Driven Photocatalytic Degradation of Tetracycline Using p-n Heterostructured Cr2O3/ZrO2 Nanocomposite
by Xueyu Wei, Saraschandra Naraginti, Pengli Chen, Jiyuan Li, Xiaofan Yang and Buwei Li
Water 2023, 15(20), 3702; https://doi.org/10.3390/w15203702 - 23 Oct 2023
Cited by 7 | Viewed by 2171
Abstract
Antibiotic pollution beyond the safety limits poses a significant threat to the environmental sustainability and human health which necessitates the development of efficient methods for reducing antibiotics in pharmaceutical wastewater. Photocatalysis is a proven technology which has drawn considerable attention in semiconductor photocatalysts. [...] Read more.
Antibiotic pollution beyond the safety limits poses a significant threat to the environmental sustainability and human health which necessitates the development of efficient methods for reducing antibiotics in pharmaceutical wastewater. Photocatalysis is a proven technology which has drawn considerable attention in semiconductor photocatalysts. Our study aims to develop a highly efficient Cr2O3/ZrO2 photocatalyst for the degradation of tetracycline (TCL) under visible light. The synthesized catalyst was well characterized by XRD, HR-TEM-SAED, XPS, FT-IR, BET and UV-Vis-DRS methods. The effects of various parameters on photocatalytic degradation were evaluated in detail, showing that 97.1% of 50 mgL−1 tetracycline concentrations could be degraded within 120 min at pH 5 with a 0.1 gL−1 photocatalyst-loading concentration under visible light (300 W Xe lamp). The uniform distribution of spherical ZrO2 nanoparticles on the surface of the Cr2O3 nano-cubes efficiently reduced the recombination rate with an energy bandgap of 2.75 eV, which provided a faster photodegradation of tetracycline under visible light. In addition, a plausible degradation pathway and photoproducts generated during the photocatalytic degradation of TCL are proposed based on the LC-ESI/MS results, which suggested that efficient photodegradation was achieved during the visible light irradiation. Thus, our study reveals that the cost-effective Cr2O3-based photocatalyst with multi-reusability and efficient energy consumption could be an efficient photocatalyst for the rapid degradation of TCL during the wastewater treatment process. Full article
(This article belongs to the Special Issue Potential of Nanomaterials for Efficient Wastewater Treatment)
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11 pages, 2901 KiB  
Article
Synthesis of Sulfur-Doped Magnetic Iron Oxides for Efficient Removal of Lead from Aqueous Solutions
by Junqing Xu, Meitian Pan, Cong Zou, Xueqiong Huang, Takeshi Hagio, Ryoichi Ichino, Long Kong and Liang Li
Water 2023, 15(20), 3667; https://doi.org/10.3390/w15203667 - 20 Oct 2023
Viewed by 1485
Abstract
Heavy metal pollution poses an environmental risk, and its efficient removal and facile separation from water remains a challenge. Magnetic iron oxide, an eco-friendly, relatively stable, and easy-separation material, has been regarded as one of the most applicable adsorbents for water treatment. However, [...] Read more.
Heavy metal pollution poses an environmental risk, and its efficient removal and facile separation from water remains a challenge. Magnetic iron oxide, an eco-friendly, relatively stable, and easy-separation material, has been regarded as one of the most applicable adsorbents for water treatment. However, the limited adsorption capacity has restricted its applications. Herein, sulfur-doped magnetic Fe3O4 (Sx–Fe3O4) adsorbent was fabricated using a calcination method for the efficient removal of Pb(II) from water. In contrast to undoped Fe3O4, the introduction of doped sulfur greatly enhanced the adsorption performance of S–Fe3O4 over four times, with a maximum capacity of 333.33 mg g−1, which was synthesized at 300 °C with a raw molar ratio of S–Fe of 5. Based on the structure and morphology analysis, it was demonstrated that sulfur was successfully doped into the Fe3O4 structures, which resulted in Fe3O4 with active sulfur sites accordingly contributing to the adsorption enhancement through the combination of strong soft–soft interactions between soft base sulfur and soft acid Pb(II) along with surface adsorption. Sx–Fe3O4 could maintain the adsorption performance in the presence of competing ions. Furthermore, although the sulfur doping process exhibited slight side effects on the magnetic property, magnetic Sx–Fe3O4 maintained the high separation potential. This study presented a promising strategy to enhance the adsorption performance of Fe3O4 through sulfur doping for Pb(II) removal from water. Full article
(This article belongs to the Special Issue Potential of Nanomaterials for Efficient Wastewater Treatment)
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