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Fate of Organosilicon Compounds in the Environment

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

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 4667

Special Issue Editors


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Guest Editor
Polish Geological Institute - National Research Institute, Rakowiecka 4, 00-975 Warszawa, Poland
Interests: environmental analytical chemistry; geoanalytical chemistry; advanced oxidation processes; emerging environmental pollutants
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
GP CHEM. Laboratory of Biogas Research and Analysis, ul. Legionów 40a/3, 87-100 Toruń, Poland
Interests: biomethane; biogas; energy conversion; siloxanes; green chemistry; waste-to-energy; GC-MS

Special Issue Information

Dear Colleagues,

In 1863, two scientists, C. Friedel and J.M. Crafts, synthesized the organic silicon compound tetraethyl silane (C2H5)4Si for the first time. In 1945, the direct synthesis of chlorosilanes in the presence of a catalyst started the modern organic silicon industry. The application of the hydrosilation reaction for the generation of organic silicone in 1947 and thermal condensation production of organic silicon monomer in 1950 opened the way for various organosilicon products, such as organosilicon surfactant applied in personal care products, medicine, pesticide formulations, and organosilicon based grease, oils, various polymers, resins, rubber, and caulk. Hitherto, organosilicon linkage is not found in nature; thus, it was believed that those compounds do not degrade in the environment. However, the problems with valorization engines related to the presence of volatile organic silicon compounds in biogas from landfills and wastewater treatment plants revealed a lack of knowledge on the fate of organosilicon compounds in the environment.              

This Special Issue will publish outstanding papers presenting the latest research on the fate of organosilicon compounds in the environments.The Special Issue will collect review articles and research papers on topics that include, but are not limited to the following:

  •   Hydrolysis and photodegradation of organosilicon compounds and toxicity of formed by-products.
  •   Radical-induced degradation of organosilicon compounds and toxicity of formed byproducts.
  •   Biochemistry of organosilicon compounds.
  •   Biodegradation of organosilicon compounds.
  •   Atmospheric chemistry of volatile organosilicon compounds.
  •   Analytical methods for the determination of organosilicon compounds and their degradation products in biological and environmental samples.

Dr. Przemysław Drzewicz
Dr. Grzegorz Piechota
Guest Editors

Manuscript Submission Information

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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

  • organosilicon compounds
  • organosilicon surfactants
  • polydimethylsiloxanes
  • volatile organosilicon compounds
  • alkyl siloxanes
  • volatile methylsiloxanes
  • organosilicon polymers

Published Papers (1 paper)

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Research

20 pages, 4547 KiB  
Article
Siloxanes in Biogas: Approaches of Sampling Procedure and GC-MS Method Determination
by Grzegorz Piechota
Molecules 2021, 26(7), 1953; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26071953 - 30 Mar 2021
Cited by 20 | Viewed by 3108
Abstract
A new approach of siloxane sampling based on impinger, micro-impinger, adsorption on active carbon, and direct TedlarBag methods followed by gas chromatography-mass spectrometry (GC-MS) was developed for the analysis of three linear (L2–L4) and four cyclic (D3–D5) volatile methyl siloxanes (VMSs). Three kinds [...] Read more.
A new approach of siloxane sampling based on impinger, micro-impinger, adsorption on active carbon, and direct TedlarBag methods followed by gas chromatography-mass spectrometry (GC-MS) was developed for the analysis of three linear (L2–L4) and four cyclic (D3–D5) volatile methyl siloxanes (VMSs). Three kinds of organic liquid-medium characterized by different polarities, namely acetone, methanol, and d-decane as siloxanes trap were arranged in the experiment which is widely discussed below. Thus, the GC-MS equipped with SUPELCOWAX-10 capillary column was employed to perform monitoring of VMS content in the analyzed biogas samples originating from landfill, wastewater treatment plants, and agriculture biogas plants. In all samples that have undergone the analysis, cyclic and linear VMSs were found in quantities exceeding 107.9 and 3.8 mg/m3, respectively. Significant differences between siloxanes concentrations depending on biogas origin were observed. Moreover, the high range of linearity (0.1 to 70.06 mg/m3), low LoD (0.01 mg/m3), low LoQ (0.04 mg/m3), and high recovery (244.1%) indicate that the procedure and can be applied in sensitive analyses of silica biogas contaminants. In addition to the above, the impinger method of sampling performed better than active-carbon Tube and TedlarBag, particularly for quantifying low concentrations of siloxanes. Overall, the evaluation of sampling methods for biogas collection simplified the analytical procedure by reducing the procedural steps, avoiding the use of solvents, as well as demonstrated its applicability for the testing of biogas quality. Full article
(This article belongs to the Special Issue Fate of Organosilicon Compounds in the Environment)
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