Study of the interactions of copper (II) with humic-like substances extracted from hydrochar from sugarcane bagasse and vinasse

• Grant number: 19/17918-7
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: January 01, 2020
• End date: December 31, 2021
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Altair Benedito Moreira
• Grantee: Bernardo Ribeiro de Moura
• Host Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil

Abstract

Humic substances (HS) are complex macromolecular components resulting from the chemical and biological degradation of plant and animal waste, which have diverse structures and functionalities. They are widely distributed in soils, water bodies and sediments. Studies have shown that hydrothermal carbonization (HTC) of biomass produces a carbon-rich material called hydrochar and a liquid phase called process water. The procedure employs mild temperatures of a maximum of 300 ° C, wet biomass and self-generated pressures. The hydrochar may have, in its structure, high amount of organic matter and some nutrients.This paper aims to characterize and study the behavior of interactions of "humic-like substances" (HLS) extracted from hydrochar with copper (II) metal. In this work, HTC will be conducted using the by-products of the sugar-energy sector, sugarcane bagasse and vinasse. The HTC will be carried out at 232 °C using a mixture of sugarcane bagasse and vinasse with the addition of 2.5% (v / v) potassium hydroxide to the reaction. HLS will be extracted from hydrochar following the recommendations of the International Humic Substances Society (IHSS).HLS extracted from hydrochar will be characterized by infrared (FTIR), elemental analysis (CHNS), UV-Vis spectrophotometry, Molecular Fluorescence, Carbon Nuclear Magnetic Resonance (13C NMR) and two-dimensional correlation spectroscopy (2D-FTIR-COS).

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MOURA, BERNARDO R.; SANTOS, VINICIUS S.; METZKER, GUSTAVO; FERREIRA, ODAIR P.; BISINOTI, MARCIA C.; BOSCOLO, MAURICIO; MOREIRA, ALTAIR B.. Oxidation of hydrochar produced from byproducts of the sugarcane industry for the production of humic-like substances: Characterization and interaction study with Cu(II). Chemosphere, v. 324, p. 8-pg., 2023-03-08. (18/05673-7, 17/26718-6, 19/18831-2, 18/15733-7, 19/17918-7, 10/09998-6)

SANTOS, VINICIUS S.; MOURA, BERNARDO R.; METZKER, GUSTAVO; CORNELIO, MARINONIO L.; FERREIRA, ODAIR P.; MOUNIER, STEPHANE J. L.; HAJJOUL, HOUSSAM; BOSCOLO, MAURICIO; BISINOTI, MARCIA C.; MOREIRA, ALTAIR B.. Increase of Fluorescence of Humic-Like Substances in Interaction with Cd(II): a Photoinduced Charge Transfer Approach. Journal of Fluorescence, v. N/A, p. 7-pg., 2022-06-09. (18/05673-7, 21/09126-3, 10/09998-6, 14/22400-3, 19/18831-2, 18/15733-7, 17/26718-6, 19/17918-7)