Hydrochars produced with by-products from the sucroenergetic industry: a study of extractor solutions on nutrient and organic carbon release

Author(s)

Santos, Daniely Reis ^[1] ; Cunha, Otavio da Mata ^[1] ; Bisinoti, Marcia Cristina ^[1] ; Ferreira, Odair Pastor ^[2] ; Moreira, Altair Benedito ^[1] ; Melo, Camila Almeida ^[1]

Affiliation

^[1] Univ Estadual Paulista, Dept Quim & Ciencias Ambientais, Lab Estudos Ciencias Ambientais, Inst Biociencias Letras & Ciencias Exatas, UNESP, Campus Sao Jose do Rio Preto, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

^[2] Univ Fed Ceara, Lab Mat Funcionais Avancados LaMFA, Dept Fis, POB 6030, BR-60455900 Fortaleza, Ceara - Brazil

• Document type: Journal article
• Source: Environmental Science and Pollution Research; v. 26, n. 9, p. 9137-9145, MAR 2019.
• Web of Science Citations: 0

Abstract

Hydrothermal carbonization transforms biomass into value-added material called hydrochar. The release of nutrients (P, N, Ca, Mg, and K) and organic carbon (TOC) from hydrochar in different extractive solutions was investigated in this study. Two sets of hydrochar were produced: (i) hydrochar prepared from sugarcane bagasse and vinasse mixture (BV-HC) and (ii) hydrochar prepared by the addition of H3PO4 to this mixture (BVA-HC). Both hydrochar types released significative amounts of nutrient and organic carbon, mainly Ca (5.0 mg g(-1)) in the mixture (KCl, K2SO4, NaOH, 1:1:1) extractive solution and TOC (72.6 mg g(-1)) in the NaOH extractive solution, for BV-HC. Nutrient release was influenced by pH and ionic strength. The release of P, Ca, and Mg was affected by the presence of insoluble phosphate phases in BVA-HC. The release of nutrients P, N, Ca, Mg, and K and organic carbon demonstrated that hydrochar has potential for soil application purposes. (AU)

• FAPESP's process: 14/22400-3 - Evaluation of the potential reuse of the Bittern and hidrochar obtained from hydrothermal carbonization of vinasse and sugar bagasse with a view to agricultural application
• Grantee: Altair Benedito Moreira
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/21776-7 - Development of a hydrochar from waste sugarcane industry using hydrothermal carbonization seeking agricultural application
• Grantee: Camila de Almeida Melo
• Support Opportunities: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 14/10368-8 - Release of phosphorus species in different extractors from hydrochar obtained with residues of the sugarcane industry
• Grantee: Daniely Reis Santos
• Support Opportunities: Scholarships in Brazil - Scientific Initiation