Effect of the reaction medium on the immobilization of nutrients in hydrochars obtained using sugarcane industry residues. (August 2017)

• Record Type: Journal Article
• Authors: Silva, Camila Centurion; Melo, Camila Almeida; Soares Junior, Francisco Holanda; Moreira, Altair Benedito; Ferreira, Odair Pastor; Bisinoti, Márcia Cristina
• Is Part Of: Bioresource technology. Volume 237(2017)
• Page Start: 213
• Page End: 221
• Publication Date: 2017-08
• Subjects: Immobilization -- Hydrothermal carbonization -- Sugarcane bagasse -- Vinasse; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.04.004
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: HTC of sugarcane bagasse and vinasse immobilizes nutrients in the hydrochar. Increasing the temperature of the HTC, increases the immobilization of nutrients. The addition of acids, bases and salts influences the immobilization of nutrients. Abstract: In this study, nutrients were immobilized on the hydrochars obtained by hydrothermal carbonization (HTC) of a vinasse and sugarcane bagasse mixture, in the presence of acid, base and salt additives at temperatures of 150, 190 and 230 °C. The increase in temperature caused higher immobilization of Ca, Mg, K, N, Cu, Mn, Zn, B, P and Fe in all hydrochars produced. H3 PO4 and NaOH immobilized higher amounts of P, Mg and Mn, while Ca was immobilized in higher quantities in the presence of H3 PO4 and (NH4 )2 SO4 . The addition of H2 SO4, H3 PO4 and (NH4 )2 SO4 was responsible for an increased immobilization of P, N, Ca, Mg and K. The immobilization of B, not present in the starting raw material, was possible with the addition of H3 BO3 . The results showed that it is possible to alter the reaction medium to immobilize nutrients on hydrochars produced from vinasse and sugarcane bagasse, for agricultural applications.