Szczegóły publikacji
Opis bibliograficzny
Effect of $CO_{2}$ and $CO_{2}$-steam activation atmospheres on the adsorptive performance of food industry waste biochars toward heavy metals: the role of strong alkalinity effect / Agata MLONKA-MĘDRALA, Agata STEMPKOWSKA, Monika ORLOF-NATURALNA, Izabela KALEMBA-REC, Wojciech JERZAK, Małgorzata CIERPIŃSKA, Maider Bolaños Oribe, Aneta MAGDZIARZ // Biomass & Bioenergy ; ISSN 0961-9534 . — 2027 — vol. 217 pt. A art. no. 109775, s. 1–12. — Bibliogr. s. 11–12, Abstr. — Publikacja dostępna online od: 2026-07-14
Autorzy (8)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 169646 |
|---|---|
| Data dodania do BaDAP | 2026-09-28 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.biombioe.2026.109775 |
| Rok publikacji | 2027 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Biomass & Bioenergy |
Abstract
The conversion of agricultural residues into value-added bio-based materials is a key pathway supporting the transition toward a circular bioeconomy. In this study, biochars derived from sunflower husks (SH), buckwheat husks (BH), and cherry stones (CS) were produced by gasification at 900 °C under CO2 and CO2-steam atmospheres and evaluated for the removal of Pb(II), Cu(II), and Ni(II) ions from aqueous solutions. Particular attention was given to the coupling between biomass conversion conditions, ash chemistry, and resulting material performance. CO2-steam gasification enhanced pore development and intensified the release of alkaline mineral species. The highest alkalinity was observed for SH biochar produced under CO2-steam conditions, with a pH of up to 9.73 and potassium leaching of 83.8 mg/dm3. In contrast, CO2 gasification promoted mineral stabilisation, reducing the pH of calcium-phosphorus-rich CS biochar from 9.18 to 7.52. Metal removal depended strongly on both surface properties and ash-derived solution chemistry. Pb(II) removal reached almost 100% for SH and BH biochars, with apparent removal capacities of approximately 70 mg/g and residual Pb(II) concentrations below the detection limit, indicating precipitation-dominated immobilisation. Cu(II) removal showed mixed adsorption-precipitation behaviour, with the highest apparent capacities reaching approximately 67 mg/g under strongly alkaline conditions. Ni(II) removal was mainly controlled by BET (Brunauer–Emmett–Teller) surface area and porosity, reaching 30-33 mg/g for steam-activated biochars. Overall, this study provides new insights into the design of biochar-based materials from biomass residues, supporting sustainable biomass valorisation and the development of functional bio-products within circular economy frameworks.
