Hydrothermal carbonization of invasive plant biomass as a tool for its safe utilization and production of artificial humic substances

Invasive plants may cause significant environmental risks by affecting biological diversity, ecosystem services, agriculture, and forestry. Safe utilization of invasive plant biomass by obtaining new outcome products useful for bioeconomics is a challenging but promising solution. Hydrothermal carbo...

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Published in:Invasive plant science and management 2024-06, Vol.17 (2), p.86-94
Main Authors: Klavins, Maris, Ansone-Bertina, Linda, Krumins, Janis, Purmalis, Oskars, Klavina, Laura, Vincevica-Gaile, Zane
Format: Article
Language:English
Subjects:
Acids
Agricultural ecosystems
Agricultural production
Agriculture
Aquatic plants
Biodiversity
Bioeconomics
Biomass
Biomass energy
Carbon capture and storage
Carbon sequestration
Carbonization
Catalysts
Composting
Ecological economics
Ecosystem services
Environmental risk
Humic acids
Humic substances
Invasive plants
New products
Organic matter
Plant biomass
Plant layout
Seeds
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Summary:Invasive plants may cause significant environmental risks by affecting biological diversity, ecosystem services, agriculture, and forestry. Safe utilization of invasive plant biomass by obtaining new outcome products useful for bioeconomics is a challenging but promising solution. Hydrothermal carbonization (HTC) presents a sustainable and cost-effective approach to transforming invasive plant biomass into new products while simultaneously supporting carbon capture aims. This study utilized invasive plants such as lupine [Lupinus polyphyllus Lindl.], Sosnowsky’s hogweed [Heracleum sosnowskyi Manden.], and Japanese knotweed [Polygonum cuspidatum Siebold & Zucc.] as biomass sources for HTC to produce artificial humic substances (AHS). The greatest impact on the yield of AHS (maximum gained yield of 62%) was the duration of the HTC process (up to 6 h) and temperature of the treatment (from 160 up to 250 C), as well as the catalyst used (an alkaline medium is preferable). During the HTC treatment, significant changes in the invasive plant biomass composition occur, as indicated by the removal of labile components of organic matter. The AHS obtained are essentially similar to natural humic matter and have biostimulatory properties; thus, they can be applied in agriculture and other areas of bioeconomics.
ISSN:1939-7291
1939-747X
DOI:10.1017/inp.2024.13