Siryk et al. (2024): Novel biochar-filled hydrogel composites: Assessment of multifunctionality and potential in environmental applications
Olena Siryk, Agnieszka Tomczyk, Artur Nosalewicz, Katarzyna Szewczuk-Karpisz IN: Journal of Environmental Management, 371, https://doi.org/10.1016/j.jenvman.2024.123345
Hydrogels (HGs) are hydrophilic 3D-cross-linked polymers applied, inter alia, to improve soil resistance to drought. Their combination with biochar (BC), a product of biomass pyrolysis, can result in obtaining specific composites characterized by the advantages of both initial materials. This review explores the properties of biochar-filled hydrogel composites, including swelling degrees and ability to absorb heavy metals and other toxic compounds. Additionally, it discusses their agricultural applications as soil conditioners and slow-release fertilizers, covering their effects on water and nutrient retention in the soil, soil microbial activity, as well as plant performance under contamination and drought stress. Finally, the cost-economic assessment and future prospects of these novel materials were proposed.