
Alberto Wisniewski JrFederal University of Sergipe · Department of Chemistry
Alberto Wisniewski Jr
PhD
Leader of Petroleum and Energy from Biomass research group
Co-founder of Bio Carbon Brazil
About
116
Publications
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Introduction
Alberto Wisniewski Jr currently works at the Department of Chemistry, Universidade Federal de Sergipe. Alberto does research in Petroleum and Energy from Biomass, with focus in Advanced Analytical Chemistry for characterization of complex misture of compounds as crude oils and bio-oils. Other research field is the thermoconverion of biomass to produce biofuels. One of their current project is 'Sustainable use of renewable natural resources applied to energy, environment and biotechnology - Thermal conversion of lignocelullosic waste biomass'. In the field of organic geochemistry and Petroleomic their current project is `The evaluation of polar crude oils fractions on the stabilization of emulsions and their relation with the environment.`
Additional affiliations
February 2010 - present
Publications
Publications (116)
Understanding the molecular composition of crude oils in terms of the polar compounds present is critical for obtaining geochemical information and elucidating physical–chemical properties. This study contributed to understanding the geochemical characteristics of the Sergipe-Alagoas basin, Brazil, by analysis of ultra-high resolution Fourier trans...
Pyrolytic lignin from beech wood bio-oil was fractionated into low molecular mass (LMM) and high molecular mass (HMM). A comprehensive characterization by FTIR, GPC, TG, GC/MS, and multidimensional NMR spectroscopy was employed to analyze the individual fractions. Additionally, advanced characterization was carried out using ultra-high-resolution m...
Introduction
The species Lantana camara is used in folk medicine. The biological activities of this medicinal plant are attributable to the presence of various derivatives of triterpenoids and phenolic compounds present in its preparations, indicating excellent economic potential.
Objective
In this study, the operational conditions of ultrasound‐a...
Pyrolysis is a promising alternative for the removal or immobilization of hazardous elements in sewage sludge (SS) without compromising its biofertilizer features. However, the effects of pyrolysis on SS emerging contaminants have not been fully investigated. Therefore, this study aimed to assess the fate of heavy metals, pesticides, and organic po...
In 2019, large amounts of oil reached the northeast coast of Brazil, causing damage to the environment and the local economy, especially in the state of Pernambuco. In order to correlate with possible sources, investigation was made of the geochemical biomarkers of the oils using “gold standard” forensic protocols from the European Committee for St...
Multiple studies have focused on the effect of long-term weathering processes on oils after spill events, without considering the chemical compositional changes occurring shortly after the release of oil into the environment. Therefore, the present study provides a broad chemical characterization for understanding of the changes occurring in the ch...
Research to identify plant bioactive compounds led to the evolution of extraction methods. This study optimized ultrasound-assisted extraction (UAE) and microwave-assisted extraction (MAE) to extract the flavonoids of Croton grewioides Baill. species contributing to characterize the polar extract profile and understand the antioxidant potential of...
The use of renewable sources for energy has increased due to the high demand of modern society and the environmental impacts caused by the use of fossil fuels. Environmentally friendly renewable energy production may involve thermal processes, including the application of biomass. We provide a comprehensive chemical characterization of sludges from...
In this work, we proposed the pyrolysis process for the valorization of de-oiled defective coffee beans (DCB) residual biomass provided by the pressurized fluid extraction (PFE) process after the recovery of coffee oil. The proposal to subsequent thermoconversion of the de-oiled biomasses focuses in an integrated biorefinery concept to obtain value...
Food waste can be a useful carbon resource when chemically recycled. While co-pyrolysis of realistic food waste (FW) has been studied, its complex upgrading is yet to be investigated. The catalytic hydrodeoxygenation (HDO) was employed for studying the pyrolysis oil generated from microwave co-pyrolysis of FW and low-density polyethylene (LDPE). Mo...
In the present work, we compared the chemical profile of the organic compounds produced in non-catalytic pyrolysis of sugarcane bagasse at 500 °C with those obtained by the in-line catalytic upgrading of the vapor phase at 350 °C. The influence over the chemical profile was evaluated by testing two Ni-based catalysts employing an inert atmosphere (...
Microscale pyrolysis reactors are used to predict the properties of pyrolysis products and/or optimize operating conditions. However, a major challenge encountered with these systems concerns reactor scale-up, since the conception of an equivalent large-scale configuration involves a complex step of mathematical analysis of the process. Furthermore...
A method to pretreatment of biomasses using glycerol as a green solvent was developed. Optimization of organosolv pretreatment was performed using a 23 factorial design, investigating synergism among the variables particle size (from < 0.85 to > 2.0 mm), FeCl3 concentration (0.025-0.175 mol L–1), and temperature (160-220 °C). Although the effects o...
The social, economic, and environmental impacts of climate change have been shown to affect poorer populations throughout the world disproportionally, and the COVID-19 pandemic of 2020-2021 has only exacerbated the use of less sustainable energy, fuel, and chemical sources. The period of economic and social recovery following the pandemic presents...
Abstract In 2019, much of the northeastern coast of Brazil was impacted by a mysterious oil spill that caused an environmental disaster affecting 1009 beaches. Four samples were collected in the beaches between Sergipe and Pernambuco for geochemical characterization of the spilled oil and to compare with those main produced in Sergipe-Alagoas basin...
The trend in the modern world is to replace fossil fuels with green energy sources in order to reduce their environmental impact. The biorefinery industry, within this premise, needs to establish quantitative and qualitative analytical methods to better understand lignocellulosic biomass composition and structure. This paper presents chemical techn...
A novel electrochemical sensor based on activated biochar (AB4) and reduced graphene oxide (rGO) was developed and tested for detection of paraquat (PQ) in food samples. Precursor biochar was obtained by the pyrolysis of water hyacinth biomass at 400, 500, and 600 oC, followed by a chemical activation step using HNO3 to increase the amount of oxyge...
Industrial processes of acerola juice generate a great amount of lignocellulosic waste biomass. This work studies the thermal conversion of this biomass into value-added products by the pyrolysis. The process was carried out in a continuous rotary kiln reactor, investigating the influence of temperature on the yields and in the chemical characteris...
Abstrat
Degradation of the Acid Black 210 dye (AB210) in synthetic and industrial effluent samples was performed, for the first time, using a heterogeneous electro-Fenton (EF) process with a CoFe2O4/NOM magnetic hybrid catalyst (Hb200). The technique was compared with electrochemical oxidation using electrogenerated hydrogen peroxide (AO-H2O2). The...
In this study, oil was extracted from various types of defective coffee beans using pressurized fluids. After extraction using solvents, the residual biomass was used as a raw material in a pyrolysis process to obtain bio-oil. Palmitic and linoleic fatty acids were the predominant components of the obtained oils. When n-propane was used for pressur...
Biofuels from unconventional sources contribute to the reduction of environmental impacts without competing with the food market. Samples of fatty esters mixture (FEM) for biodiesel purposes were produced from conventional and alternatives feedstocks sources of triacylglycerols (TAG). In this work, we evaluated the oxidative stability through a com...
In this work, the production of renewable hydrocarbons was explored by the means of waste cottonseed oil (WCSO) micropyrolysis at 500ºC. Catalytic upgrading of the pyrolysis vapors was studied using alpha-Al2O3, gamma-Al2O3, Mo-Co/gamma-Al2O3, and Mo-Ni/gamma-Al2O3 catalysts. The oxygen removal efficiency was much lower in non-catalytic pyrolysis (...
Soil application of biochar (BC) manufactured from nutrient-rich biomasses may be an effective strategy to reduce chemical fertilizer use. Chemical and molecular composition and P species of water hyacinth BCs produced at 400 (BC400), 500 (BC500), and 600 °C (BC600) were assessed by elemental, chemical and spectroscopic (FTIR, ¹³C and ³¹P NMR) anal...
A simple, efficient, environmentally friendly, and inexpensive synthesis route was developed to obtain a magnetic nano-hybrid (GH) based on graphene and cobalt ferrite. Water with a high content of natural organic matter (NOM) was used as solvent and a source of carbon. The presence of NOM in the composition of GH was confirmed by FTIR and Raman sp...
The contamination of terrestrial environments by oil spills creates biological risks to humans and affects the ecosystem’s health. The studies that aim to evaluate the toxicity and changes in the environments are a field of potential interest to the scientific community. The objective of this study was to evaluate the changes in the chemical compos...
Vegetable oils in neglected matrices (monguba seeds and immature green coffee beans) were extracted using a mixture of pressurized carbon dioxide (CO2) and propane. The yields, fatty acid profiles, and active compounds in the extracted oils were evaluated employing a Box-Behnken experimental design, considering the effects of temperature (20-60 oC)...
Streptomyces hygroscopicus UFPEDA 3370 was fermented in submerged cultivation and the biomass extract was partitioned, obtaining a fraction purified named EB1. After purification of EB1 fraction, nigericin free acid was obtained and identified. Nigericin presented cytotoxic activity against several cancer cell lines, being most active against HL-60...
The complexity of crude oil samples has hindered its detailed analysis and understanding. Although modern analytical methods such as ultrahigh-resolution mass spectrometry have opened the understanding of the molecular composition, discrimination due to the complexity is sabotaging a better understanding. Therefore, the SARA fractionation has been...
The Japaratuba River Basin is one of the most important hydrogeological units in terms of water demand in the state of Sergipe, Brazil. Due to its poorly developed water supply plan, oil exploration and agricultural industries, the Japaratuba River Basin is susceptible to considerable environmental stress. Emphasis is given to the area of the Campo...
Brazil has the world’s second largest cattle herd, which produces 1.9 billion tons of cattle manure per year. This work describes, for the first time, the processing of cattle manure by pyrolysis at 400, 500, and 600 °C in a rotary kiln reactor, as an alternative means of treating this waste to produce second generation biofuels. The biomass was ma...
The in vitro antifungal activity of the liquid fraction obtained from cattle manure pyrolysis was determined. Bio-oils and aqueous phases produced at 400, 500, and 600 °C were tested against two phytopathogenic fungi by incorporating the oil and water phase materials into culture medium, at concentrations of 1, 2, 3, 4, and 5 mg mL⁻¹. The antifunga...
In this book, the authors briefly present a description of the main pyrolysis process, the pretreatment of biomass, the characteristics of biomass, and pyrolysis products through an upgraded methods and its application. The book is divided into ten chapters dedicated to showing the potential of the thermochemical process to convert biomass into bio...
This work evaluated the antifungal activity of essential oils of Myrcia ovata chemotypes (MYRO-175, MYRO-156, MYRO-154, MYRO-165, and MYRO-015) and their major compounds (linalool, geraniol, citral, and (E)-nerolidol) on the phytopathogenic fungi Fusarium pallidoroseum (which causes melon postharvest rot) and Colletotrichum musae (which causes anth...
The hydrodeoxygenation (HDO) of bio-oil at 350 °C and 200 bar in a batch reactor over a Ru/C catalyst has been studied experimentally with the aim of contributing to the understanding of the HDO reaction and its effect on the physicochemical properties of the organic liquid fraction obtained. Moreover, the effect of the catalyst loading ratio used...
PurposeThe ability of biochars prepared from pyrolysis of guava pulp and seed industrial wastes to form complexes with the ions vanadyl (VO2+), a Pearson hard acid, and copper divalent (Cu2+), an intermediate acid, was used to characterize the ligand groups of biochars prepared in a laboratory oven and in a pilot plant. These biochars are highly su...
This work describes the characterization of esters derived from waste frying oil, sewage scum, and domestic fat trap residue. The innovative aspects of this work include the use of domestic fatty residues, study of the influence of the gas chromatography injection conditions on correct determination of the esters content, and the use of deactivated...
The combination of fractionation methods for crude oils, such as saturate, aromatic, resin and asphaltene (SARA) fractionation, in combination with analysis by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) has been used for reducing the complexity and improving the characterization of crude oils. We have used the FT-ICR MS...
Different ionization techniques based on different principles have been applied for the direct mass spectrometric (MS) analysis of crude oils providing composition profiles. Such profiles have been used to infer a number of crude oil properties. We have tested the ability of two major atmospheric pressure ionization techniques, electrospray ionizat...
Biodiesel is an alternative fuel obtained from different biomass sources and processes. Nowadays, this biofuel has gained importance due to environmental concerns and rising energy demand. In the biodiesel production chain, stability is a critical issue, as it is linked to the maintenance of its original properties. This work performed a study eval...
Copper contamination and toxicity in soils is a worldwide problem, especially in areas where copper-based fungicides are applied. Indian mustard (Brassica juncea L.) plants are used in phytoremediation and are also edible crops commonly cultivated in organic agricultural areas. Application of biochar to Cu contaminated soils may reduce Cu availabil...
Asphaltenes are still problematic fractions and their composition is not fully unveiled as it relates to the original crude oil and the precipitation method. In this work, the composition of asphaltenes precipitated with n-heptane and n-pentane from ten crude oils from the Sergipe-Alagoas Basin were assessed by Ultra-High Resolution Fourier Transfo...
Design of experiments (DOE) applied to mass spectrometry (MS), mainly focusing on the optimization of ionization techniques, has been applied to optimize experiments in order to provide the highest amount of information with the lowest number of experiments. However, DOE has not been used in petroleomics. For the first time, we applied DOE to optim...
The use of L-proline derivatives employed in OXA-Michael-Henry tandem reactions has been an efficient method to produce enantiomerically enriched compounds. In this work it was carried out a study of the OXA-Michael-Henry reactions between salicylaldehyde and β-nitrostyrenes, catalyzed by L-proline and its derivatives. The corresponding (R)-3-nitro...
A sample of cottonseed oil dregs was obtained by the alkali pretreatment of the oil to remove free fatty acids and other impurities before an industrial biodiesel production process. The alkali dregs was characterized and submitted to non-catalytic, catalytic, and reactive hydrogen atmosphere micropyrolysis experiments to assess the capacities for...
Large-scale production of aromatic plants is subject to phytotechnical challenges, such as management, irrigation, nutrition, and soil fertility, as well as exogenous issues that may affect the chemical composition of secondary metabolites. The aim of this study was to evaluate the effect of organo-mineral fertilizer on the biomass and essential oi...
The complex geochemical characteristics of crude oils can provide important information on oil generation, such as the input of organic matter and their depositional environment. Classical geochemical characterization of crude oils can also support exploration, extraction and production. The objective of this work was show the first organic geochem...
The invasive aquatic plants Eichhornia crassipes (water hyacinth), Eichhornia azurea, and Nymphaea spp. were evaluated as sources of lignocellulosic biomass for the production of bio-oil. These plants have high growth rates that can lead to various environmental problems and the production of large amounts of waste biomass. The materials were chara...
The aim of the present work was to use agroindustrial wastes as alternative adsorbents for the removal of trihalomethanes (THMs). SEM micrographs of sugar cane bagasse and coconut mesocarp samples showed a high degree of particle agglomeration, with particle sizes of 114.4 ± 74.0 μm, while the sugar cane bagasse particles were larger (557.3 ± 169.5...
O presente estudo buscou desenvolver um método geral de fracionamento, permitindo obter de uma mesma amostra os óleos essenciais e, em seguida, o extrato aquoso e orgânico, destinado ao isolamento e análises químicas utilizando duas amostras própolis provenientes da Região dos Campos Gerais do Paraná. A análise dos óleos essenciais por CG/EM, permi...
Ultra-high resolution and mass accuracy Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS) with an electrospray ionization source (ESI) was applied to characterize the bio-oils that were obtained using a micropyrolysis process of alternative biomasses from Eichornia crassipes (water hyacinth), Eichornia azurea, and Nymphaea ssp...