Use of local waste for biochar production: Influence of feedstock and pyrolysis temperature on chromium removal from aqueous solutions

ARÁN, DANIELA S.; DEZA, MARÍA; MONFERRÁN, MAGDALENA V.; PIGNATA, M. LUISA; HARGUINTEGUY, CARLOS A.

Integrated Environmental Assessment and Management

John Wiley and Sons Inc

Año: 2022

1551-3793

ediment enrichment with biochar, a high-carbon material produced by the pyrolysis of biomass, is a promising remediation strategy for metal pollution. The metal immobilization capacity of biochar can be explained by its porous structure, surface functional groups, pH greater than 7, and cation exchange capacity. However, the effectiveness in reducing metal bioavailability depends on the physicochemical characteristics of the biochar, which are strongly associated with the process conditions and feedstock. The aims of this study were to analyze the effect of pyrolysis temperature on the properties of biochars derived from different locally available biomass materials, biochar potential to adsorb Cr, and biochar phytotoxicity in seed germination. Poultry litter (PL), maize straw, the macrophyte Juncus imbricatus, and phytoremediation wastes from the macrophyte previously exposed to Cr were pyrolyzed into biochar at 300 °C and 600 °C. The properties and capacity of biochar to remove Cr f