Tannery waste-derived biochar as a carrier of micronutrients essential to plants

Skrzypczak, Dawid; Szopa, Daniel; Mikula, Katarzyna; Izydorczyk, Grzegorz; Baśladyńska, Sylwia; Hoppe, Viktoria; Pstrowska, Katarzyna; Wzorek, Zbigniew; Kominko, Halyna; Kułażyński, Marek; Μουστάκας, Κωνσταντίνος; Chojnacka, Katarzyna; Krowiak, Anna Witek –

doi:10.1016/j.chemosphere.2022.133720

Cited by 18 publications

(2 citation statements)

References 33 publications

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“…The evolution of FTIR spectra as a function of carbonization temperature has been reported less often [ 7 , 82 ] and the gradual disappearance of the bands corresponding to the individual bond vibrations has been observed [ 81 , 83 ].…”

Section: Characterizationmentioning

confidence: 99%

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Carbonized Leather Waste: A Review and Conductivity Outlook

et al. 2023

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The carbonization of collagen-based leather waste to nitrogen-containing carbon is reviewed with respect to the preparation, characterization of carbonized products, and applications proposed in the literature. The resulting nitrogen-containing carbons with fibrous morphology have been used as adsorbents in water pollution treatment, in electrocatalysis, and especially in electrodes of energy-storage devices, such as supercapacitors and batteries. Although electrical conductivity has been implicitly exploited in many cases, the quantitative determination of this parameter has been addressed in the literature only marginally. In this report, attention has been newly paid to the determination of conductivity and its dependence on carbonization temperature. The resulting powders cannot be compressed into pellets for routine conductivity determination. A new method has been used to follow the resistivity of powders as a function of pressure up to 10 MPa. The conductivity at this pressure increased from 9.4 × 10−8 S cm−1 for carbonization at 500 °C to 5.3 S cm−1 at 1000 °C. The conductivity of the last sample was comparable with conducting polymers such as polypyrrole. The carbonized leather thus has the potential to be used in applications requiring electrical conduction.

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Section: Characterizationmentioning

confidence: 99%

“…Biochar has been used in agriculture as a compost additive [ 104 ]. The adsorption ability biochar derived from leather waste has been enriched with cationic micronutrients and applied as a soil conditioner [ 82 ].…”

Section: Applicationsmentioning

confidence: 99%

Carbonized Leather Waste: A Review and Conductivity Outlook

et al. 2023

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Innovative fertilizers and soil amendments based on hydrochar from brewery waste

Skrzypczak,

Mironiuk,

Witek-Krowiak

et al. 2023

Clean Techn Environ Policy

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Hydrothermal carbonization is one of the new ways to produce valuable products from waste materials. The aim of this study was to develop a novel method for the production of hydrochars from brewery residues for agricultural applications. Waste materials treated at 140 °C, 170 °C, and 200 °C were used as a source of renewable nitrogen and as delivery agents of fertilizer microelements (Cu, Mn, and Zn). HTC materials were enriched with nutrients using an innovative spray sorption method. The surface texture was characterized by the nitrogen adsorption technique, functional groups were identified (FT-IR), and thermogravimetric analysis of the materials was performed. Preliminary germination tests have shown phytotoxic effects at doses greater than 20% (relative to plant nitrogen requirements) for unenriched hydrochars. To minimize inhibition of plant growth, air aging tests were conducted for 30 days, followed by successive drying at 110 °C for 72 h. It was observed that the higher the temperature of the carbonization process, the faster the desorption of components in a solution simulating soil conditions (NaNO3) occurs. The pot tests on cucumber (Cornichon de Paris) showed that the biometric parameters of the plant (stem length and root ball parameters) for the hydrochar obtained at 170 °C were higher than in the group fertilized with mineral fertilizer. Twice the fresh plant mass was noted for this group compared to the reference. In addition, the study recorded a particular increase in nitrogen content in plants fertilized with a 150% dose of enriched hydrochar, where the element content increased by about 100% compared to the group with mineral fertilizer applied (100% dose). The study shows that properly prepared hydrochars from brewery waste offer great potential as a nitrogen source and micronutrient delivery agents for the agrochemical sector. Graphical Abstract

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