Recovery and Use of Bioactive Materials and Biomass

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closed (25 August 2025)

Manuscript submission deadline

closed (25 November 2025)

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Image courtesy of ©Dr. Xianbao Xu - Gdansk University of Technology

Topic Information

Dear Colleagues,

Solid waste originates from many fields, including industrial and agricultural production, as well as daily life in general. The improper disposal of solid waste can lead to ecological environmental risks; however, solid waste is also an important resource. Bioactive materials and recyclable materials are significant components of solid waste, and the recovery in addition to the use of bioactive or recyclable materials are of great significance in regard to the recycling of waste substances.

This Topic has a threefold focus: The first pertains to the technical and environmental challenges in material cycling and waste management. The second involves utilizing artificial intelligence (AI) technology for intelligent identification, the optimization of recycling processes, and enhanced resource recovery. The third focuses on advancing interdisciplinary scientific research to drive further progress in material cycling and solid waste management.

Prof. Dr. Xiang Li
Dr. Tianfeng Wang
Dr. Xianbao Xu
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Biomass biomass	-	4.2	2021	19.8 Days	CHF 1000
Microorganisms microorganisms	4.2	7.7	2013	15.2 Days	CHF 2700
Sustainability sustainability	3.3	7.7	2009	19.3 Days	CHF 2400
Water water	3.0	6.0	2009	19.1 Days	CHF 2600
Fermentation fermentation	3.3	5.7	2015	15.5 Days	CHF 2100
Energies energies	3.2	7.3	2008	16.2 Days	CHF 2600
Materials materials	3.2	6.4	2008	15.2 Days	CHF 2600
Applied Biosciences applbiosci	-	2.9	2022	23.4 Days	CHF 1000

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Published Papers (2 papers)

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All Biomass Microorganisms Sustainability Water Fermentation Energies Materials Applied Biosciences

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29 pages, 2151 KB  

Open AccessReview

Review on Biochar Upgrading Methods for Its Application in Thermochemical Conversion Processes and Critical Materials Recovery

by Payam Danesh, Matteo Prussi, Andrea Salimbeni, Viviana Negro and David Chiaramonti

Sustainability 2025, 17(22), 10194; https://doi.org/10.3390/su172210194 - 14 Nov 2025

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Abstract

With the rapid increase in solid waste generated worldwide, sustainable approaches for the recovery of resources considering environmental protection are required. As one of the emerging strategies in recent years, biochar has shown great potential due to its high carbon stabilization, adjustable porosity [...] Read more.

With the rapid increase in solid waste generated worldwide, sustainable approaches for the recovery of resources considering environmental protection are required. As one of the emerging strategies in recent years, biochar has shown great potential due to its high carbon stabilization, adjustable porosity and tunability. This review focuses on the critical assessment of the available technologies for biochar upgrading, with a specific objective of biochar physicochemical functionality improvement and critical materials recovery in line with circular economy targets. We systematically review physicochemical activation methodologies, functionalizations and leaching approaches, accounting for their effects on surface area, porosity and functional group chemistry. Particular attention is paid to the dual functionality of upgraded biochar (i) as a catalyst support for thermochemical processes and (ii) as a medium for the recycling of essential nutrients (e.g., phosphorus, potassium, magnesium, calcium). It is evidenced that customized activation can further improve its adsorption and catalytic efficiency as well as promote near-total nutrition extraction. This review positions advanced biochar as an enabling multipurpose technology across sustainable material production, nutrient cycling and waste valorization in the circular bioeconomy. Full article

(This article belongs to the Topic Recovery and Use of Bioactive Materials and Biomass)

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15 pages, 3782 KB  

Open AccessArticle

Cassia grandis L.f. Pods as a Source of High-Value-Added Biomolecules: Optimization of Extraction Conditions and Extract Rheology

by Filipe M. M. Cordeiro, Salomé G. Bedoya, Daniel A. P. Santos, Rebeca S. Santos, Thomas V. M. Bacelar, Filipe S. Buarque, George Simonelli, Ana C. M. Silva and Álvaro S. Lima

Biomass 2025, 5(2), 24; https://doi.org/10.3390/biomass5020024 - 25 Apr 2025

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Abstract

High-value-added biomolecules such as phenolic compounds and flavonoids from secondary metabolism and macromolecules such as sugars are the main constituents of several plants. Thus, this work aims to optimize the extraction of these biomolecules present in the pods of Cassia grandis L.f. Initially, [...] Read more.

High-value-added biomolecules such as phenolic compounds and flavonoids from secondary metabolism and macromolecules such as sugars are the main constituents of several plants. Thus, this work aims to optimize the extraction of these biomolecules present in the pods of Cassia grandis L.f. Initially, the effect of choline-based ionic liquids—ILs (choline chloride [Ch]Cl, dihydrogen citrate [Ch][DHC], and bitartrate [Ch][BIT]) as extracting agents for phenolic compounds and flavonoids was evaluated based on their efficiency and selectivity. Then, a 2³ full factorial design with six central points was performed using the IL concentration, the solid–liquid ratio, and the temperature as independent variables. The extract obtained in the best condition was subjected to pervaporation, after which the concentrates and the crude extract were used to determine the physical properties (density, viscosity, and refractive index). The hydrophobic–hydrophilic balance of the extracting agent and the biomolecules are the extraction process’s driving force. The best extraction condition was formed by [Ch][DHC] at 15 wt%, with a solid–liquid ratio of 1:15, at 45 °C for 30 min, resulting in 153.71 ± 5.81 mg·g⁻¹ of reducing sugars; 483.51 ± 13.10 mg·g⁻¹ of total sugars; 11.79 ± 0.54 mg·g⁻¹ of flavonoids; and 38.10 ± 2.90 mg·g⁻¹ of total phenolic compounds. All the physical properties of the biomolecules are temperature-dependent; for density and refractive index, a linear correlation is observed, while for viscosity, the correlation is exponential. Increasing the temperature decreases all properties, and the extract concentration for 8× presents the highest values of density (1.283 g·cm⁻³), viscosity (9224 mPa·s), and refractive index (1.467). Full article

(This article belongs to the Topic Recovery and Use of Bioactive Materials and Biomass)

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