molecules-logo

Journal Browser

Journal Browser

Biobased Chemicals: Environmentally Friendly Solutions for Sustainable Development, 3rd Edition

A special issue of Molecules (ISSN 1420-3049).

Deadline for manuscript submissions: 30 June 2026 | Viewed by 671

Special Issue Editor


E-Mail Website
Guest Editor
Faculty of Process and Environmental Engineering, Lodz University of Technology, 90-924 Lodz, Poland
Interests: distributed energy systems using upgraded (torrefied, torrefied and pelletized) biomass for cogeneration units; additives for fertilizers and active carbon production as a core technology for novel; more sustainable energy and agriculture systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In today’s world, the energy, agricultural and chemical sectors need to explore new renewable bioproducts and natural alternatives that are necessary for sustainable development. This Special Issue will present a collection of articles related to biobased chemicals and materials such as biochars produced via pyrolysis or torrefaction, or hydrochars produced via hydrothermal carbonization processes, as well as valuable by-products produced during different thermochemical processes, such as levulinic acid, acetic acid, aldehydic acid, formic acid, and propionic acid used in energy, agricultural and chemical platforms. This collection will include different biomass torrefaction processes and their applications in low-carbon demand industries for production, such as carbonized solid biofuels, biochar as an additive in organic fertilizers, and biosorbents for chemical and thermochemical processes, whose products are upgraded to obtain new bioproducts for specialized uses (functional applications), such as activated carbon for deodorization in biogas plants. We therefore invite papers on biomass torrefaction processes, bioproduct production for different industrial applications, torrefaction process kinetics modeling, reviews, industrial demonstration examples, case studies, and LCA analyses of biomass torrefaction plants.

Dr. Szymon Szufa
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 250 words) can be sent to the Editorial Office for assessment.

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

  • bioproducts
  • biochar
  • hydrochar
  • by-products
  • biofuels
  • biomass
  • hydrothermal carbonization
  • torrefaction

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • Reprint: MDPI Books provides the opportunity to republish successful Special Issues in book format, both online and in print.

Further information on MDPI's Special Issue policies can be found here.

Published Papers (1 paper)

Order results
Result details
Select all
Export citation of selected articles as:

Research

22 pages, 1483 KB  
Article
13C-NMR Spectroscopy and Elemental Composition of Humic Acids of Brown Forest Soils and Sod-Brownzems of the Southern Vitim Plateau (Russia, Baikal Region)
by Erzhena Chimitdorzhieva, Tsypilma Korsunova, Yurii Tsybenov, Nimbu Baldanov and Elena Valova
Molecules 2026, 31(4), 606; https://doi.org/10.3390/molecules31040606 - 9 Feb 2026
Viewed by 284
Abstract
This study shows that the structural features of humic acids reflect the specific characteristics of organic matter in permafrost soils of the southern Vitim Plateau. The region’s extracontinental climate determines the rate of decomposition, the depth of humification, and the chemical structure of [...] Read more.
This study shows that the structural features of humic acids reflect the specific characteristics of organic matter in permafrost soils of the southern Vitim Plateau. The region’s extracontinental climate determines the rate of decomposition, the depth of humification, and the chemical structure of humic acids. Brown forest soils (Haplic Cambisols) and sod-brownzems (Leptic Cambisols Skeletic) contain high amounts of organic carbon and total nitrogen in their upper horizons but differ in their vertical distribution. Brown forest soils are characterized by a sharp decrease in organic carbon content with depth and the presence of humus pockets enriched in carbon and exchangeable bases. Sod-brownzems contain more organic carbon with increase in acidity and base loss with depth. Both soil types retain satisfactory natural fertility. 13C nuclear magnetic resonance spectroscopy data reveal marked differences in the structural maturity of humic acids. Humic acids from the A horizons of brown forest soils contain an equilibrium combination of aliphatic and aromatic structures, a well-developed system of oxygen-containing groups, and moderate condensation, indicating an intermediate stage of humification. Humic acids from humus pockets are more aromatic and highly humified. They reflect an advanced stage of humification and possess high chemical stability. Humic acids from sod-brownzems also exhibit high aromaticity, which facilitates the formation of stable organomineral complexes. A comparison of the samples reveals a consistent increase in aromaticity, condensation, and stability from the A horizons of brown forest soils to the A horizons of sod-brownzems and further to humus pockets. This progression corresponds to an increase in humification and a decrease in the mobility and bioavailability of organic matter. These results confirm that the structural characteristics of humic acids are determined by soil type and formation conditions. Elemental composition revealed that humic acids from brown forest soils are characterized by the highest aromaticity and maturity, while humic acids from HA-brown forest soils-A have a less condensed structure. Humic acids from sod-brownzems occupy an intermediate position, combining high aromatization with a moderate degree of humification. Overall, the obtained elemental composition data are fully consistent with the results of 13C NMR spectroscopy, mutually confirming the identified structural features and the degree of transformation of soil organic matter. Full article
Show Figures

Figure 1

Back to TopTop