Environmental Science and Pollution Research

, Volume 26, Issue 9, pp 9137–9145 | Cite as

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

  • Daniely Reis Santos
  • Otávio da Mata Cunha
  • Márcia Cristina Bisinoti
  • Odair Pastor Ferreira
  • Altair Benedito Moreira
  • Camila Almeida MeloEmail author
Research Article


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.


Hydrochar Nutrients Release Vinasse Sugarcane bagasse Slow release fertilizer 



The authors are grateful to the Laboratório de Sucroquímica e Química Analítica – UNESP/IBILCE for providing the infrared spectrometer.

Funding information

This study received financial support and scholarship from Fundação de Amparo à Pesquisa do Estado de São Paulo FAPESP (Grants 2005/51242-8, 2013/21776-7, 2014/10368-8, 2014/22400-3), Conselho Nacional de Desenvolvimento Científico e Tecnológico - CNPq (Grants 445487/2014-3 and 307925/2012-9), Fundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico - FUNCAP (Grant PRONEX PR2-0101-00006.01.00/15) and from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES (Grant PROCAD 2013 grant 183995).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Departamento de Química e Ciências Ambientais, Laboratório de Estudos em Ciências AmbientaisInstituto de Biociências, Letras e Ciências Exatas, UNESP, Universidade Estadual Paulista, Campus São José do Rio PretoSão José do Rio PretoBrazil
  2. 2.Laboratório de Materiais Funcionais Avançados (LaMFA), Departamento de FísicaUniversidade Federal do CearáFortalezaBrazil

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