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Molecules
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Environmental Nanoparticles: Separation, Characterization, and Analysis
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Environmental Nanoparticles: Separation, Characterization, and Analysis

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

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 2486

Special Issue Editors

Dr. Petr S. Fedotov

E-Mail Website
Guest Editor
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia
Interests: analytical chemistry; biogeochemistry; environment; nanoparticles; microparticles; fractionation; speciation; trace elements
Dr. Mikhail S. Ermolin

E-Mail Website
Guest Editor
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia
Interests: environment; nanoparticles; microparticles; dust; volcanic ash; separation; nanospeciation

Special Issue Information

Dear Colleagues,

Nanoparticles are ubiquitous in terrestrial, aquatic, and air environments. According to their origin, environmental nanoparticles are divided into three main groups: natural, incidental, and engineered ones. Environmental nanoparticles are an integral part of the Earth’s system and their study is a fundamental problem of geo- and environmental sciences. Nevertheless, there is still a lack of information on the fate and impact of nanoparticles in the environment, for example, on homo- and heteroaggregation processes, the sorption of dissolved species, interactions with natural organic matter, the transport of nanoparticulate species, chemical transformations, etc. Generally, the reason for this gap lies in the field of analytical chemistry. The separation of nanoparticles from complex environmental samples (such as soil, dust, volcanic ash, sediments, waters, etc.) and their further characterization and analysis require the development and application of novel efficient procedures and methods.

This Special Issue is designed to gather scientific papers on the separation, characterization, and analysis of nanoparticles for the investigation of their behavior, fate, and impact in environmental compartments. Studies on the detection, isolation, preconcentration, and quantification of environmental nanoparticles are also welcome.

Dr. Petr S. Fedotov
Dr. Mikhail S. Ermolin
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. Molecules 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 2700 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

  • nanoparticles
  • novel procedures and methods
  • separation and preconcentration
  • detection and quantification
  • characterization and analysis
  • fate and behavior in the environment

Published Papers (2 papers)

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Research

14 pages, 2836 KiB  
Article
Comparison of Gas–Particle Partitioning of Glyoxal and Methylglyoxal in the Summertime Atmosphere at the Foot and Top of Mount Hua
by Weining Qi, Yifan Zhang, Minxia Shen, Lu Li, Wenting Dai, Yukun Chen, Yali Liu, Xiao Guo, Yue Cao, Xin Wang, Yingkun Jiang and Jianjun Li
Molecules 2023, 28(13), 5276; https://doi.org/10.3390/molecules28135276 - 07 Jul 2023
Viewed by 896
Abstract
Glyoxal and methylglyoxal are important volatile organic compounds in the atmosphere. The gas–particle partitioning of these carbonyl compounds makes significant contributions to O3 formation. In this study, both the gas- and particle-phase glyoxal and methylglyoxal concentrations at the foot and top of [...] Read more.
Glyoxal and methylglyoxal are important volatile organic compounds in the atmosphere. The gas–particle partitioning of these carbonyl compounds makes significant contributions to O3 formation. In this study, both the gas- and particle-phase glyoxal and methylglyoxal concentrations at the foot and top of Mount Hua were determined simultaneously. The results showed that the gaseous-phase glyoxal and methylglyoxal concentrations at the top were higher than those at the foot of the mountain. However, the concentrations for the particle phase showed the opposite trend. The average theoretical values of the gas–particle partitioning coefficients of the glyoxal and methylglyoxal concentrations (4.57 × 10−10 and 9.63 × 10−10 m3 μg−1, respectively) were lower than the observed values (3.79 × 10−3 and 6.79 × 10−3 m3 μg−1, respectively). The effective Henry’s law constants (eff.KH) of the glyoxal and methylglyoxal were in the order of 108 to 109 mol/kgH2O/atm, and they were lower at the foot than they were at the top. The particle/gas ratios (P/G ratios) of the glyoxal and methylglyoxal were 0.039 and 0.055, respectively, indicating more glyoxal and methylglyoxal existed in the gas phase. The factors influencing the partitioning coefficients of the glyoxal and methylglyoxal were positively correlated with the relative humidity (RH) and negatively correlated with the PM2.5 value. Moreover, the partitioning coefficient of the glyoxal and methylglyoxal was more significant at the top than at the foot of Mount Hua. Full article
(This article belongs to the Special Issue Environmental Nanoparticles: Separation, Characterization, and Analysis)
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19 pages, 8370 KiB  
Article
Enhancing Cu2+ Ion Removal: An Innovative Approach Utilizing Modified Frankincense Gum Combined with Multiwalled Carbon Tubes and Iron Oxide Nanoparticles as Adsorbent
by Mushtaq Hussain, Syed Sulaiman Hussaini, Mohammad Shariq, Hanan Alzahrani, Arafa A. Alholaisi, Samar H. Alharbi, Sirajah A. Alsharif, Wafa Al-Gethami, Syed Kashif Ali, Abdel-Nasser M. A. Alaghaz, Mohd Asim Siddiqui and Kondaiah Seku
Molecules 2023, 28(11), 4494; https://doi.org/10.3390/molecules28114494 - 01 Jun 2023
Cited by 2 | Viewed by 1205
Abstract
Aquatic pollution, which includes organic debris and heavy metals, is a severe issue for living things. Copper pollution is hazardous to people, and there is a need to develop effective methods for eliminating it from the environment. To address this issue, a novel [...] Read more.
Aquatic pollution, which includes organic debris and heavy metals, is a severe issue for living things. Copper pollution is hazardous to people, and there is a need to develop effective methods for eliminating it from the environment. To address this issue, a novel adsorbent composed of frankincense-modified multi-walled carbon nanotubes (Fr-MMWCNTs) and Fe3O4 [Fr-MWCNT-Fe3O4] was created and subjected to characterization. Batch adsorption tests showed that Fr-MWCNT-Fe3O4 had a maximum adsorption capacity of 250 mg/g at 308 K and could efficiently remove Cu2+ ions over a pH range of 6 to 8. The adsorption process followed the pseudo-second-order and Langmuir models, and its thermodynamics were identified as endothermic. Functional groups on the surface of modified MWCNTs improved their adsorption capacity, and a rise in temperature increased the adsorption efficiency. These results highlight the Fr-MWCNT-Fe3O4 composites’ potential as an efficient adsorbent for removing Cu2+ ions from untreated natural water sources. Full article
(This article belongs to the Special Issue Environmental Nanoparticles: Separation, Characterization, and Analysis)
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