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Applied Sciences
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Novel Technologies on the Removal of Micropollutants from Water Samples
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Novel Technologies on the Removal of Micropollutants from Water Samples

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

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 5351

Special Issue Editor

Prof. Dr. Dragana Mutavdžić Pavlović

E-Mail Website
Guest Editor
Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, 10000 Zagreb, Croatia
Interests: environmental analytical chemistry (water samples, soil, sediments); emerging contaminants; sample preparation (solid-phase extraction, matrix-solid phase dispersion, microwave extraction, ultrasonic extraction, etc.); liquid chromatography; sorption; photocatalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The journal Applied Sciences (ISSN 2076-3417) is currently running a Special Issue titled "Novel Technologies on the Removal of Micropollutants from Water Samples". Prof. Dragana Mutavdžić Pavlović, PhD is serving as Guest Editor for this issue.

The occurrence of pharmaceuticals as well as other micropollutants (additives in personal care products, dyes, microplastics, pesticides, heavy metals, etc.) in the aquatic environment has become an issue of increasing concern in recent years, and many efforts have been devoted to a different way of their removal from different water environments. This Special Issue wishes to stimulate discussion of these issues and invites research groups dealing with such issues to present their recent and promising results.

Research papers and short communications dealing with the Novel Technologies (photocatalysis and other AOP processes, nanotechnology, sorption, etc.) on the Removal of Micropollutants from Water Samples are welcome!

Prof. Dr. Dragana Mutavdžić Pavlović
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

  • micropollutants
  • water samples
  • nanotechnology
  • sorption
  • photocatalysis and other AOP processes

Published Papers (3 papers)

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Research

15 pages, 8503 KiB  
Article
Photocatalytic Degradation of Pharmaceutical Trimethoprim in Aqueous Solution over Nanostructured TiO2 Film Irradiated with Simulated Solar Radiation
by Davor Ljubas, Hrvoje Juretić, Alan Badrov, Martina Biošić and Sandra Babić
Appl. Sci. 2023, 13(9), 5681; https://doi.org/10.3390/app13095681 - 5 May 2023
Cited by 6 | Viewed by 1679
Abstract
Pharmaceuticals are characterized by a wide range of physical, chemical, and biological properties and functionalities that contribute to their inherent complexity as compounds. Unfortunately, human carelessness during the production, use, and disposal of these compounds results in their presence in the environment. This [...] Read more.
Pharmaceuticals are characterized by a wide range of physical, chemical, and biological properties and functionalities that contribute to their inherent complexity as compounds. Unfortunately, human carelessness during the production, use, and disposal of these compounds results in their presence in the environment. This study utilized a nanostructured TiO2 film on a glass ring at the bottom of a reactor and simulated a solar radiation lamp as the radiation source for both photocatalytic and photolytic experiments, with the aim of unraveling the mechanism behind the degradation of trimethoprim (TMP), a pharmaceutical compound. This approach provides a novel perspective on the role of TiO2 in the degradation of pharmaceuticals and could pave the way for more efficient and sustainable wastewater treatment methods. Scavenger studies were carried out using isopropanol, ammonium oxalate, and triethanolamine to examine the photocatalytic mechanism. Isopropanol and triethanolamine were found to impede the photocatalytic degradation of TMP, highlighting the significance of hydroxyl radicals and positive holes in the degradation process, while no inhibition was observed in the presence of ammonium oxalate. The complete degradation of TMP through photocatalysis under simulated solar radiation was observed in ultra-pure water in fewer than 3 h, as indicated by the results. Our findings suggest that utilizing natural solar radiation as a source of UV-A radiation in reactor configurations based on this approach holds promise for cost-effective pharmaceutical degradation treatment in wastewater treatment plants. The practical potential of this approach is supported by the results obtained under simulated solar radiation with an irradiation intensity in the UV-A region of 33 ± 2 W/m2. Full article
(This article belongs to the Special Issue Novel Technologies on the Removal of Micropollutants from Water Samples)
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17 pages, 7746 KiB  
Article
Biomass Fly Ash Self-Hardened Adsorbent Monoliths for Methylene Blue Removal from Aqueous Solutions
by Marinélia N. Capela, Francielly R. Cesconeto, Paula C. Pinto, Luís A. C. Tarelho, Maria P. Seabra and João A. Labrincha
Appl. Sci. 2022, 12(10), 5134; https://doi.org/10.3390/app12105134 - 19 May 2022
Cited by 5 | Viewed by 1511
Abstract
The use of methylene blue (MB) by several industries generates contaminated industrial wastewaters that must be purified before discharge into the environment. Its removal can be achieved by adsorption, and low-cost and easily available materials should be used as adsorbents. Biomass fly ash [...] Read more.
The use of methylene blue (MB) by several industries generates contaminated industrial wastewaters that must be purified before discharge into the environment. Its removal can be achieved by adsorption, and low-cost and easily available materials should be used as adsorbents. Biomass fly ash (BFA) generated from biomass combustion, for heat and power generation, is increasing worldwide since the process is considered CO2 neutral. However, most of the ash is still landfilled. This study aims to evaluate the valorisation of BFA as a low-cost porous bulk adsorbent for MB removal from wastewaters. The monoliths were obtained after 14 days of curing just after adding water and a porogenic agent (aluminium powder) to the BFA, using the self-hardening ability of this waste. The BFA was characterised for chemical (XRF) and mineralogical (XRD) composition, particle size distribution (laser diffraction-COULTER) and morphology (SEM). The monolith sample cured for 14 days was characterised for density, porosity (total and open), microstructure, compressive strength, and MB removal ability (batch tests). The results showed that the addition of aluminium powder (0.09 wt.%) promoted an increase in interconnected porosity and the MB removal efficiency reached 80% for the most porous samples. The equilibrium data for the adsorption process were well characterised by a type 2 Langmuir isotherm equation with a monolayer adsorption capacity (qmax) that ranged from 0.22 to 0.66 mg/g. Full article
(This article belongs to the Special Issue Novel Technologies on the Removal of Micropollutants from Water Samples)
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15 pages, 2821 KiB  
Article
Sorption Potential of Different Forms of TiO2 for the Removal of Two Anticancer Drugs from Water
by Kristina Tolić Čop, Dragana Mutavdžić Pavlović, Katarina Duić, Minea Pranjić, Iva Fereža, Igor Jajčinović, Ivan Brnardić and Vedrana Špada
Appl. Sci. 2022, 12(9), 4113; https://doi.org/10.3390/app12094113 - 19 Apr 2022
Cited by 2 | Viewed by 1681
Abstract
Anticancer drugs pose a potential risk to the environment due to their significant consumption and biological effect even at low concentrations. They can leach into soils and sediments, wastewater, and eventually into drinking water supplies. Many conventional technologies with more effective advanced oxidation [...] Read more.
Anticancer drugs pose a potential risk to the environment due to their significant consumption and biological effect even at low concentrations. They can leach into soils and sediments, wastewater, and eventually into drinking water supplies. Many conventional technologies with more effective advanced oxidation processes such as photocatalysis are being extensively studied to find an economical and environmentally friendly solution for the removal of impurities from wastewater as the main source of these pharmaceuticals. Since it is impossible to treat water by photocatalysis if there is no sorption of a contaminant on the photocatalyst, this work investigated the amount of imatinib and crizotinib sorbed from an aqueous medium to different forms of photocatalyst. In addition, based on the sorption affinity studied, the applicability of sorption as a simpler and less costly process was tested in general as a potential route to remove imatinib and crizotinib from water. Their sorption possibility was investigated determining the maximum of sorption, influence of pH, ionic strength, temperature, and sorbent dosage in form of the suspension and immobilized on the fiberglass mesh with only TiO2 and in combination with TiO2/carbon nanotubes. The sorption isotherm data fitted well the linear, Freundlich, and Langmuir model for both pharmaceuticals. An increasing trend of sorption coefficients Kd was observed in the pH range of 5–9 with CRZ, showing higher sorption affinity to all TiO2 forms, which was supported by KF values higher than 116 (μg/g)(mL/μg)1/n. The results also show a positive correlation between Kd and temperature as well as sorbent dosage for both pharmaceuticals, while CRZ sorbed less at higher salt concentration. The kinetic data were best described with a pseudo-second-order model (R2 > 0.995). Full article
(This article belongs to the Special Issue Novel Technologies on the Removal of Micropollutants from Water Samples)
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