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Applied Sciences
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Emerging Technologies for Air Quality Improvement
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Emerging Technologies for Air Quality Improvement

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

Deadline for manuscript submissions: closed (15 October 2023) | Viewed by 4196

Special Issue Editor

Dr. Thomas Maggos

E-Mail Website
Guest Editor
NCSR “Demokritos”, Atmospheric Chemistry & Innovative Technologies Laboratory, 15310 Athens, Greece
Interests: air quality; analytical chemistry; atmospheric chemistry; source apportionment, particulate matter; climate change; catalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Which emerging technologies are the answer to poor air quality? This Special Issue, Emerging Technologies for Air Quality Improvement, aims to answer the above question covering all the latest outstanding developments in the field of air quality (AQ) improvement technologies.

Among many environmental challenges we are currently facing, air quality is especially difficult to manage. The enforcement of regulation is complicated by the difficulty of tracking down the source of harmful emissions. Moreover, the elimination of air pollution is usually expensive. A promising aspect of modern society is that many newer technologies—some of which are already in use—can help facilitate a measurable decrease in pollution. Emerging technologies have a lot to offer to that end, both helping to reduce pollution and contaminants and to clean up conventional operations. This Special Issue will describe recent research and developments in the field of innovative technologies which aim to improve both indoor and outdoor environments. The Issue will focus on studies which implement innovative technologies for air pollution abatement. Such technologies include photocatalysis, innovative materials, smart air conditioning, smart air purification systems, green agriculture, clean industry and vehicle technologies, etc. Furthermore, it will also focus on methodological approaches to AQ improvement such as the implementation of wide sensor networks that will allow decision-making based on real-time data, high-tech cameras for the quantification and monitoring of pollution events, citizen engagement in reducing air pollution, making using of more advanced sensors, analytics, and communication tools, etc.

Emerging technologies in terms of both infrastructure and methodology aiming to respond in a timely fashion to air pollution and help to ensure cleaner air for all are welcome.

Dr. Thomas Maggos
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

  • air pollution abatement
  • emerging technologies for AQ improvement
  • photocatalysis
  • smart air purifiers and air conditions
  • smart air pollution sensors and cameras
  • citizen science for air pollution abatement

Published Papers (2 papers)

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Research

23 pages, 5544 KiB  
Article
Assessment of the NO2 Spatio-Temporal Variability over Thessaloniki, Greece, Using MAX-DOAS Measurements and Comparison with S5P/TROPOMI Observations
by Dimitris Karagkiozidis, Maria-Elissavet Koukouli, Alkiviadis Bais, Dimitris Balis and Paraskevi Tzoumaka
Appl. Sci. 2023, 13(4), 2641; https://0-doi-org.brum.beds.ac.uk/10.3390/app13042641 - 18 Feb 2023
Cited by 2 | Viewed by 1466
Abstract
In this article, we investigate the spatio-temporal variability of tropospheric NO2 Vertical Column Densities (VCDs) and surface concentrations that were retrieved using Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements over Thessaloniki, Greece, for the period June 2020 to November 2022. The MAX-DOAS [...] Read more.
In this article, we investigate the spatio-temporal variability of tropospheric NO2 Vertical Column Densities (VCDs) and surface concentrations that were retrieved using Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements over Thessaloniki, Greece, for the period June 2020 to November 2022. The MAX-DOAS system captures the NO2 seasonal variability very well, reporting low concentrations during summer and higher concentrations in the winter, as well as the diurnal cycle with higher NO2 amounts in the morning followed by a reduction towards noon. The “weekend effect” is evident, with approximately 30% lower NO2 concentrations on the weekends compared to the working days. An excellent agreement is found with in situ data from a nearby air quality monitoring station with Pearson’s correlation coefficients ranging between R = 0.90 and R = 0.99. The spatial variability is assessed by comparing the NO2 concentrations at four azimuth viewing directions of the MAX-DOAS system. Despite the large variability due to short- and long-term temporal variations, higher NO2 concentrations of up to 25% (statistically significant at the 95% confidence level) are reported for the azimuth that crosses the entire city center and an urban area compared to those pointing towards the sea. The MAX-DOAS tropospheric NO2 columns are then compared to those measured by the TROPOspheric Monitoring Instrument (TROPOMI) on board the Sentinel-5P satellite. Despite the generally good correlation (R = 0.72 and R = 0.89 for the daily and monthly data, respectively), a clear underestimation of TROPOMI is found (approximately 55% in winter, 21% in spring and 40% during autumn and summer), mainly due to the much larger satellite footprint that provides a smoother perception of the NO2 concentration, while the MAX-DOAS measurements are more affected by local emissions. Full article
(This article belongs to the Special Issue Emerging Technologies for Air Quality Improvement)
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14 pages, 3654 KiB  
Article
Metal Titanate (ATiO3, A: Ni, Co, Mg, Zn) Nanorods for Toluene Photooxidation under LED Illumination
by Anna P. Souri, Natalia Andrigiannaki, Marilena Moschogiannaki, Vasiliki Faka, George Kiriakidis, Anna Malankowska, Adriana Zaleska-Medynska and Vassilios Binas
Appl. Sci. 2021, 11(22), 10850; https://0-doi-org.brum.beds.ac.uk/10.3390/app112210850 - 17 Nov 2021
Cited by 10 | Viewed by 1823
Abstract
The increasing air pollution taking place in virtue of human activity has a novel impact in our health. Heterogeneous photocatalysis is a promising way of degrading volatile organic compounds (VOCs) that makes the quest of new and improved photocatalysts of great importance. Herein, [...] Read more.
The increasing air pollution taking place in virtue of human activity has a novel impact in our health. Heterogeneous photocatalysis is a promising way of degrading volatile organic compounds (VOCs) that makes the quest of new and improved photocatalysts of great importance. Herein, perovskite-related materials ATiO3 with A = Mg, Ni, Co, Zn were synthesized through an ethylene glycol-mediated root, with ethylene glycol being used as a solvent and ligand. Characterization techniques such as X-ray diffraction (XRD), scanning electron microscopy, and energy dispersive X-ray spectroscopy (SEM/EDX), transmission electron microscopy (TEM), UV-vis spectroscopy, Raman spectroscopy, Fourier transform infrared (FT-IR), and photoluminescence spectroscopy (PL) were used in order to confirm the structure, the nanorod morphology, their absorption in UV-vis, and the separation efficiency of photogenerated charge carriers. The highest photoactivity was observed for ZnTiO3 in which 62% of toluene was decomposed after 60 min under LED illumination (54 mW/cm2). Full article
(This article belongs to the Special Issue Emerging Technologies for Air Quality Improvement)
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