Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 281, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2020.111878
Keywords
Hydrothermal carbonization; Sugarcane bagasse; Sugarcane vinasse; Biochar; Thermochemolysis GC-MS
Categories
Funding
- Sao Paulo Research Foundation (FAPESP, Brazil) [18/15733-7]
- National Council for Scientific and Technological Development (CNPq, Brazil)
- FAPESP [17/05575-2, 17/17991-0]
- CNPq [303377/2019-4]
- FUNCAP [PRONEX PR2-0101-00006.01.00/15]
- CAPES PROCAD 2013 Grant [183995]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [17/17991-0, 17/05575-2, 18/15733-7] Funding Source: FAPESP
Ask authors/readers for more resources
The study investigated the hydrothermal carbonization of sugarcane bagasse, vinasse and their mixture with the addition of phosphoric acid, revealing that the addition of phosphoric acid increased the overall hydrophobicity of hydrochars. Sugarcane bagasse and vinasse had different influences on the formation of hydrochars, with sugarcane bagasse leading to more polar hydrochars and vinasse resulting in more hydrophobic products.
Sugarcane bagasse, vinasse and a mixture of sugarcane bagasse and vinasse were hydrothermally carbonized (HTC), with and without the addition of phosphoric acid, in order to propose new applications of sucroenergetic industry by-products on soil. Detailed information on the composition and properties of hydrochars has been obtained through elemental composition, thermogravimetric analysis, nuclear magnetic resonance and, thermochemolysis GC-MS. The soluble acidic fraction from the hydrochar samples were applied to maize seeds to evaluate the agronomic potential as biostimulants and relate the molecular features with maize seed germination. The HTC treatment converted polysaccharide-based biomasses into hydrochars with hydrophobic characteristics (C-Aryl and C-Akyl). Furthermore, the addition of phosphoric acid further increased the overall hydrophobicity and shifted the thermal degradation of the hydrochars to higher temperatures. Biomass influenced the hydrochars that formed, in which the molecular features of sugarcane bagasse determined the formation of more polar hydrochar, due to the preservation of lignin and phenolic components. Meanwhile, the HTC of vinasse resulted in a more hydrophobic product with an enrichment of condensed and recalcitrant organic fractions. The germination assay showed that polar structures of bagasse may play a role in improving the maize seeds germination rate (increase of similar to 11%), while the hydrophobic domains showed negative effects. The responses obtained in germination seems to be related to the molecular characteristics that organic extracts can present in solution.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available