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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Humic extracts of hydrochar and Amazonian Dark Earth: Molecular characteristics and effects on maize seed germination

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Bento, Lucas Raimundo [1, 2] ; Melo, Camila Almeida [2] ; Ferreira, Odair Pastor [3] ; Moreira, Altair Benedito [2] ; Mounier, Stephane [4] ; Piccolo, Alessandro [1] ; Spaccini, Riccardo [1] ; Bisinoti, Marcia Cristina [2]
Total Authors: 8
[1] Univ Napoli Federico II, Ctr Interdipartimentale Ric Risonanza Magnet Nucl, Via Univ 100, I-80055 Portici - Italy
[2] Sao Paulo State Univ, UNESP, Inst Biosci Humanities & Exact Sci IBILCE, Dept Chem & Environm Sci, Sao Jose Do Rio Preto - Brazil
[3] Univ Fed Ceara, Dept Fis, Lab Mat Func Avancados LaMFA, POB 3151, BR-60455900 Fortaleza, Ceara - Brazil
[4] Univ Toulon & Var, AMU, Lab MIO, CNRS, IRD, CS 60584, F-83041 Toulon 9 - France
Total Affiliations: 4
Document type: Journal article
Source: Science of The Total Environment; v. 708, MAR 15 2020.
Web of Science Citations: 0

Inspired by the presence of anthropogenic organic matter in highly fertile Amazonian Dark Earth (ADE), which is attributed to the transformation of organic matter over thousands of years, we explored hydrothermal carbonization as an alternative for humic-like substances (HLS) production. Hydrothermal carbonization of sugarcane industry byproducts (bagasse and vinasse) in the presence and absence of H3PO4 afforded HLS, which were isolated and compared with humic substances (HS) isolated from ADE in terms of molecular composition and maize seed germination activity. HLS isolated from sugarcane bagasse hydrochar produced in the presence or absence of H3PO4 comprised both hydrophobic and hydrophilic moieties, differing from other HLS mainly in terms of phenolic content, while HLS isolated from vinasse hydrochar featured hydrophobic structures mainly comprising aliphatic moieties. Compared to that of HLS, the structure of soil-derived HS reflected an increased contribution of fresh organic matter input and, hence, featured a higher content of O-alkyl moieties. HLS derived from lignocellulosic biomass were rich in phenolics and promoted maize seed germination more effectively than HLS comprising alkyl moieties. Thus, HLS isolated from bagasse hydrochar had the highest bioactivity, as the presence of amphiphilic moieties therein seemed to facilitate the release of bioactive molecules from supramolecular structures and stimulate seed germination. Based on the above results, the hydrothermal carbonization of lignocellulosic biomass was concluded to be a viable method of producing amphiphilic HLS for use as plant growth promoters. (C) 2019 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 15/22954-1 - Metal transportation and natural organic matter characterization from rivers of Itacoatiara, Amazônia
Grantee:Márcia Cristina Bisinoti
Support Opportunities: Regular Research Grants
FAPESP's process: 18/15733-7 - Evaluation of the use of hydrochar for agricultural purposes and of magnetic coal as adsorbent material
Grantee:Márcia Cristina Bisinoti
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
FAPESP's process: 17/05575-2 - Structural similarity of the humic substances from hydrochar obtained from vinasse and sugarcane bagasse with the Black Earth (TPI)
Grantee:Lucas Raimundo Bento
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 17/17991-0 - Molecular characterization of the humic substances from "Terra Preta de Indio" soils and hydrochar from sugarcane wastes" by Humeomics
Grantee:Lucas Raimundo Bento
Support Opportunities: Scholarships abroad - Research Internship - Master's degree