Evaluation of indoor/outdoor urban air pollution by magnetic, chemical and microscopic studies

Jeleńska, Maria; Górka-Kostrubiec, Beata; Werner, Tomasz; Kądziałko-Hofmokl, Magdalena; Szczepaniak-Wnuk, Iga; Gonet, Tomasz; Szwarczewski, Piotr

doi:10.1016/j.apr.2017.01.006

Cited by 28 publications

(21 citation statements)

References 27 publications

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“…(33) This finding motivated a thorough characterization of ultrafine particles, which have shown elevated concentrations of transition metals. (37)(38)(39)(40) These studies become really relevant considering magnetic INPs found in the brain contained traces of other transition metals including nickel (Ni), platinum (Pt), cobalt (Co) and possibly copper (Cu). (33) Detailed size and composition characterization of INPs is required to better understand their potential implications.…”

Section: Introductionmentioning

confidence: 99%

Size, composition, morphology, and health implications of airborne incidental metal-containing nanoparticles

Gonzalez‐Pech

Stebounova

Ustunol

et al. 2019

Journal of Occupational and Environmental Hygiene

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There is great concern in the adverse health implications of engineered nanoparticles. However, there are many circumstances where the production of incidental nanoparticles, i.e., nanoparticles unintentionally generated as a side product of some anthropogenic process, is of even greater concern. In this study, metal-based incidental nanoparticles were measured in two occupational settings: a machining center and a foundry. On-site characterization of substrate-deposited incidental nanoparticles using a field-portable X-ray fluorescence provided some insights into the chemical characteristics of these metal-containing particles. The same substrates were then used to carry out further off-site analysis including single particle analysis using scanning electron microscopy and energy-dispersive X-ray spectroscopy. Between the two sites, there were similarities in the size and composition of the incidental nanoparticles as well as in the agglomeration and coagulation behavior of nanoparticles. In particular, incidental nanoparticles were identified in two forms: sub-micrometer fractal-like agglomerates from activities such as welding and super-micrometer particles with incidental nanoparticles coagulated to their surface, herein referenced as nanoparticle collectors. These agglomerates will affect deposition and transport inside the respiratory system of the respirable incidental nanoparticles and the corresponding health implications. The studies of incidental nanoparticles generated in occupational settings lay the groundwork on which occupational health and safety protocols should be built.

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Section: Introductionmentioning

confidence: 99%

Size, composition, morphology, and health implications of airborne incidental metal-containing nanoparticles

Gonzalez‐Pech

Stebounova

Ustunol

et al. 2019

Journal of Occupational and Environmental Hygiene

View full text Add to dashboard Cite

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“…One way to deal with this issue is preventing pollution by source, but the economic repercussions of this measure on industry and economic development have delayed the practical implementation [ 7 , 8 ]. Instead, additional measures have been considered for reducing the impact of VOCs on human health: increased ventilation or absorbance in filters.…”

Section: Introductionmentioning

confidence: 99%

Volatile Organic Compounds (VOCs) Removal from Indoor Air by Heterostructures/Composites/Doped Photocatalysts: A Mini-Review

Eneşca

Cazan

2020

Nanomaterials

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The impact of volatile organic compounds (VOCs) on indoor air quality and, furthermore, on human health is still a subject of research investigations considering the large increase in forms of cancer and related diseases. VOCs can be 10 times higher in indoor air concentrations then that of the outdoors, as a consequence of emissions from electronics, building materials and consumer goods. Direct transformation of VOCs in mineralization products seems to be an alternative to reduce indoor air contaminants. The advantage of photocatalysis implementation in indoor air treatment is given by the absence of additional chemicals (such as H2O2) and waste. The present mini-review presents a comparative study on VOCs photocatalytic removal considering the photocatalyst composition, morphology and specific surface. The sheet-like morphology seems to provide a higher number of active sites which may contribute to oxidative reactions. The insertion of materials able to increase light absorbance or to mediate the charge carrier’s transport will have a beneficial impact on the overall photocatalytic efficiency. Additionally, surface chemistry must be considered when developing photocatalysts for certain gas pollutants in order to favor molecule absorbance in the interfacial region. An energy consumption perspective is given based on the light intensity and irradiation period.

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“…The use of tandem systems such as CdS/TiO 2 (Isac et al, 2019;Wang et al, 2019), SnO 2 /ZnO (Ali et al, 2016;Xu et al, 2019b), ZnO/TiO 2 (Meng et al, 2018;Wetchakun et al, 2019), TiO 2 /SiO 2 (Liu et al, 2012b;Enesca et al, 2017), WO 3 /TiO 2 (Enesca et al, 2012b;Rhaman et al, 2020), SiO 2 /ZnO (Xu et al, 2019a;Nasseh et al, 2020), or SnO 2 /TiO 2 (Enesca et al, 2014;Huy et al, 2019) has improved photocatalytic properties by reducing charge carriers recombination rate and extending the absorbance spectrum. However, most of these studies are made in a liquid environment and cannot be directly transferred to gaseous predictions for the removal of pollutants (Jeleńska et al, 2017). The improvement of photocatalytic systems for the removal of an indoor air pollutant is required before studies can undertake large scale applications.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Photocatalytic Activity of SnO2-TiO2 and ZnO-TiO2 Tandem Structures Toward Indoor Air Decontamination

Eneşca

2020

Front. Chem.

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ZnO-TiO2 and SnO2-TiO2 tandem structures were developed using the doctor blade technique. It was found that by employing organic hydrophilic and hydrophobic as additives into the precursor it is possible to tailor the film density and morphology with direct consequences on the photocatalytic activity of the tandem structures. The highest photocatalytic efficiency corresponds to ZnO-TiO2 and can reach 74.04% photocatalytic efficiency toward acetaldehyde when a hydrophilic additive is used and 70.93% when a hydrophobic additive is employed. The snO2-TiO2 tandem structure presents lower photocatalytic properties (61.35 % when the hydrophilic additive is used) with a constant rate reaction of 0.07771 min−1.

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Evaluation of indoor/outdoor urban air pollution by magnetic, chemical and microscopic studies

Cited by 28 publications

References 27 publications

Size, composition, morphology, and health implications of airborne incidental metal-containing nanoparticles

Size, composition, morphology, and health implications of airborne incidental metal-containing nanoparticles

Volatile Organic Compounds (VOCs) Removal from Indoor Air by Heterostructures/Composites/Doped Photocatalysts: A Mini-Review

Enhancing the Photocatalytic Activity of SnO2-TiO2 and ZnO-TiO2 Tandem Structures Toward Indoor Air Decontamination

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