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Molecules
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Advanced Oxidation Processes for Degradation of Antibiotics in Water
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Advanced Oxidation Processes for Degradation of Antibiotics in Water

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Green Chemistry".

Deadline for manuscript submissions: closed (30 September 2024) | Viewed by 2915

Special Issue Editor

Prof. Dr. Weiliang Wang

E-Mail Website
Guest Editor
School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
Interests: nanomaterials; AOPs; water treatment; photocatalysis; Fenton-like; adsorption

Special Issue Information

Dear Colleagues,

Because a large amount of the administered doses are excreted from medicine applications, agriculture, and the pharmaceutical industry, a substantial amount of antibiotics (e.g., tetracyclines, sulfonamides, and fluoroquinolones) are released into the environment. For example, fluoroquinolones are a class of antibacterial compounds used extensively in both human and veterinary medicine and have a total consumption of approximately 44 million kilograms every year worldwide; fluoroquinolones exist in hospital wastewaters (60–120000 ng/L), wastewater treatment plant effluents (2–580 ng/L), and surface waters (5–1300 ng/L). However, the antibiotics in the environment cannot be effectively removed or degraded by sewage treatment processes due to their stable chemical structures. It has been demonstrated that the residue of antibiotics in the environment can result in the evolution of novel antibiotic-resistant bacteria that ultimately pose a threat to the aquatic ecosystem and human health, such as human organ lesions and an increased bacterial resistance. Hence, it is significant and essential to remove antibiotics efficiently from water to reduce the environmental and ecological risks. In this Special Issue, review articles, research papers, and short communications will focus on the recent advances in the degradation of antibiotics via advanced oxidation processes (AOPs), including photocatalysis, Fenton, Fenton-like, UV/H2O2, and O3 catalytic ozonation.

Prof. Dr. Weiliang Wang
Guest Editor

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Keywords

  • water treatment
  • advanced oxidation processes
  • photocatalysis
  • Fenton and Fenton-like

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Published Papers (2 papers)

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Research

14 pages, 3014 KiB  
Article
The Piezocatalytic Degradation of Sulfadiazine by Lanthanum-Doped Barium Titanate
by Daijun Meng, Yuqi Xiang, Ziwei Yang, Hao Yuan, Liang Tang and Shiyang Li
Molecules 2024, 29(8), 1719; https://doi.org/10.3390/molecules29081719 - 10 Apr 2024
Cited by 2 | Viewed by 1185
Abstract
Piezocatalysis, a heterogeneous catalytic technique, leverages the periodic electric field changes generated by piezoelectric materials under external forces to drive carriers for the advanced oxidation of organic pollutants. Antibiotics, as emerging trace organic pollutants in water sources, pose a potential threat to animals [...] Read more.
Piezocatalysis, a heterogeneous catalytic technique, leverages the periodic electric field changes generated by piezoelectric materials under external forces to drive carriers for the advanced oxidation of organic pollutants. Antibiotics, as emerging trace organic pollutants in water sources, pose a potential threat to animals and drinking water safety. Thus, piezoelectric catalysis can be used to degrade trace organic pollutants in water. In this work, BaTiO3 and La-doped BaTiO3 were synthesized using an improved sol–gel–hydrothermal method and used as piezocatalytic materials to degrade sulfadiazine (SDZ) with ultrasound activation. High-crystallinity products with nano cubic and spherical morphologies were successfully synthesized. An initial concentration of SDZ ranging from 1 to 10 mg/L, a catalysis dosage range from 1 to 2.5 mg/mL, pH, and the background ions in the water were considered as influencing factors and tested. The reaction rate constant was 0.0378 min−1 under the optimum working conditions, and the degradation efficiency achieved was 89.06% in 60 min. La-doped BaTiO3 had a better degradation efficiency, at 14.98% on average, compared to undoped BaTiO3. Further investigations into scavengers revealed a partially piezocatalytic process for the degradation of SDZ. In summary, our work provides an idea for green environmental protection in dealing with new types of environmental pollution. Full article
(This article belongs to the Special Issue Advanced Oxidation Processes for Degradation of Antibiotics in Water)
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14 pages, 3718 KiB  
Article
In Situ Synthesis of Doped Bio-Graphenes as Effective Metal-Free Catalysts in Removal of Antibiotics: Effect of Natural Precursor on Doping, Morphology, and Catalytic Activity
by Maryam Afsharpour, Lugain Radmanesh and Chuanxi Yang
Molecules 2023, 28(20), 7212; https://doi.org/10.3390/molecules28207212 - 22 Oct 2023
Cited by 1 | Viewed by 1203
Abstract
Wastewater contaminated with antibiotics is a major environmental challenge. The oxidation process is one of the most common and effective ways to remove these pollutants. The use of metal-free, green, and inexpensive catalysts can be a good alternative to metal-containing photocatalysts in environmental [...] Read more.
Wastewater contaminated with antibiotics is a major environmental challenge. The oxidation process is one of the most common and effective ways to remove these pollutants. The use of metal-free, green, and inexpensive catalysts can be a good alternative to metal-containing photocatalysts in environmental applications. We developed here the green synthesis of bio-graphenes by using natural precursors (Xanthan, Chitosan, Boswellia, Tragacanth). The use of these precursors can act as templates to create 3D doped graphene structures with special morphology. Also, this method is a simple method for in situ synthesis of doped graphenes. The elements present in the natural biopolymers (N) and other elements in the natural composition (P, S) are easily placed in the graphene structure and improve the catalytic activity due to the structural defects, surface charges, increased electron transfers, and high absorption. The results have shown that the hollow cubic Chitosan-derived graphene has shown the best performance due to the doping of N, S, and P. The Boswellia-derived graphene shows the highest surface area but a lower catalytic performance, which indicates the more effective role of doping in the catalytic activity. In this mechanism, O2 dissolved in water absorbs onto the positively charged C adjacent to N dopants to create oxygenated radicals, which enables the degradation of antibiotic molecules. Light irradiation increases the amount of radicals and rate of antibiotic removal. Full article
(This article belongs to the Special Issue Advanced Oxidation Processes for Degradation of Antibiotics in Water)
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