Article
Biochemistry & Molecular Biology
Sorour Barekat, Ali Nasirpour, Javad Keramat, Mohammad Dinari, Sima Saeidy
Summary: This study optimized the extraction of pectin from walnut green husk using the electrohydrodynamic method (EHD) and assessed its impact on pectin's chemical structure and properties. The results showed that EHD treatment significantly increased pectin yield and phenolic content, while reducing the extraction time. Both extraction methods yielded pectin with similar chemical structure and properties, but EHD treatment altered the functionality of the pectin, particularly in terms of emulsion activity.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Environmental Sciences
Erdal Yabalak, Firas Elneccar
Summary: In this study, the TAP method was effectively used to remove color and TOC of an industrial dye, MG. By optimizing experimental variables, high removal efficiencies were achieved and the TAP method was optimized using the RSM method. Additionally, hydrochars synthesized from solid food wastes showed catalytic efficiency in the oxidation process and could potentially be used in practical applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Zhuo Li, Kun Chen, Zhou Chen, Weining Li, Bernard Wiafe Biney, Aijun Guo, Dong Liu
Summary: Upcycling PUPW into AC for MG removal in wastewater is cost-effective and environmentally friendly. Different preparation procedures lead to varied properties of PUPW-AC, with intentional modulation possible. PUPW-AC-C-A shows excellent adsorption performance for MG due to electrostatic attraction, oxygen-containing groups, and pi-pi interaction.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Agricultural Engineering
Cristina Barrios, Marina Fernandez-Delgado, Juan C. Lopez-Linares, Maria Teresa Garcia-Cubero, Monica Coca, Susana Lucas
Summary: This study compared the optimization of microwave-assisted hydrothermal and alkali extraction for different agri-food wastes. The results showed that the extraction of brewers spent grain (BSG) under optimal conditions provided the highest protein content and lowest production cost, while microwave-assisted hydrothermal extraction of kale stems also produced bioactive and commercially valuable extracts. These findings contribute to the development of sustainable and climate-neutral agriculture by producing high-quality proteins from agri-food wastes.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Biochemistry & Molecular Biology
Shadpour Mallakpour, Fariba Sirous, Mohammad Dinari
Summary: In this study, a novel eco-friendly composite material, magnetic alginate beads containing citric acid-modified sawdust and Fe3O4 nanoparticles, was successfully designed for the removal of cationic malachite green. The composite exhibited easy separation under a magnetic field and high reusability, achieving a removal percentage of 90-95%. The removal process was well-described by the Langmuir isotherm and nonlinear pseudo-first-order kinetic models, suggesting possible mechanisms involving both film and intraparticle diffusion.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Environmental Sciences
Shukla Neha, Parth Rajput, Neelancherry Remya
Summary: In this study, biochar was produced by microwave co-pyrolysis of food waste and polyethylene using different microwave susceptors. The highest yield was achieved with flyash as the susceptor. Alkali modification of the flyash-derived biochar improved its adsorption capacity for metformin.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Aina Mir-Cerda, Iris Carretero, Jose Ruben Coves, Alba Pedrouso, Celia Maria Castro-Barros, Teresa Alvarino, Jose Luis Cortina, Javier Saurina, Merce Granados, Sonia Sentellas
Summary: This study focuses on the recovery and purification of polyphenols from the malolactic fermentation lees of Albarino wines. Green liquid extraction using water as a solvent successfully extracted phenolic acids and flavonoids from winery wastes. The resulting extract solution was further treated by microfiltration and ultrafiltration, revealing that malolactic fermentation lees are a valuable source of phenolic compounds.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Agricultural Engineering
Long Chen, Baobin Mi, Jiangnan He, Yuchen Li, Zhi Zhou, Fangfang Wu
Summary: In this study, functionalized banana peel biochar (BPB) was prepared by microwave-assisted pyrolysis for the first time to investigate its adsorption to malachite green (MG) dye. The maximum adsorption capacity of BPB500 and BPB900 to malachite green reached 1790.30 and 2297.83 mg.g(-1) within 120 min. The adsorption mechanism of MG dye on BPB included hydrophobic interaction, hydrogen bonding, pi-pi interaction, n-pi interaction, and ion exchange. Furthermore, BPB showed great potential for practical applications in simulated wastewater treatment experiments and cost calculations.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Dongliang Ji, Didi Gai, Yikun Xu, Zhaoqin Huang, Peitao Zhao
Summary: This study focused on using modified pyrolytic char derived from waste tires to efficiently remove the organic dye malachite green (MG) from wastewater. The modified pyrolytic char had rich -OH functional groups, higher BET surfaces, and larger pore volumes. The results showed that the modified pyrolytic char, especially the CaO-activated char, had good adsorption performance for MG.
Article
Environmental Sciences
A. Annam Renita, Kilaru Harsha Vardhan, P. Senthil Kumar, P. Tsopbou Ngueagni, A. Abilarasu, Subi Nath, Pallavi Kumari, R. Saravanan
Summary: A study comparing electrolytic, adsorption, and hybrid methods for removing malachite green dye from water using Eucalyptus globulus seeds found that the hybrid method was most effective at 12 V voltage, with removal capacity increasing with higher voltages. The removal efficiency of the particle electrodes at 6, 9, and 12 V were 95%, 97%, and 99.8% respectively, and the biosorbent could be reused up to ten times without significant loss in efficiency.
Article
Chemistry, Physical
Shu Hui Tang, Muhammad Abbas Ahmad Zaini
Summary: A highly microporous activated carbon, YSAC, with a high specific surface area, is developed for adsorption of organic compounds like malachite green. The activated carbon is primarily negatively charged with a high total acidic functional group content, and the adsorption process is described as monolayer coverage onto a homogeneous structure.
SURFACES AND INTERFACES
(2021)
Review
Multidisciplinary Sciences
Fabio G. Santeramo
Summary: This study reviews the literature on circular and green economy in the agricultural sector, particularly focusing on agri-food systems and their supply chains. The analysis identifies the need for future research to explore the nexus between food waste and environmental impacts, emphasizing the importance of taking a multidisciplinary approach to understanding this complex relationship.
Article
Engineering, Environmental
Akbar Hojjati-Najafabadi, Parisa Nasr Esfahani, Fatemeh Davar, Tejraj M. Aminabhavi, Yasser Vasseghian
Summary: The performance of a nanocomposite adsorbent, comprised of nickel ferrite, zinc oxide, and alpha alumina nanoparticles on a graphene oxide substrate, was investigated for the removal of malachite green. The composites were characterized using various spectroscopy and imaging techniques, confirming the presence of particles and preservation of particle structure in COM4. The adsorption efficiency was examined under various conditions, showing maximum adsorption using the Langmuir model at pH 7 and ambient temperature. The adsorption mechanism was proposed to involve surface functional groups, electrostatic interactions, H-bonding, 7C-7C interactions, and permeation of dye molecules into the pores of the adsorbent. The adsorbent exhibited good performance for multiple cycles after washing with ethanol.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Fadwa Largo, Redouane Haounati, Hassan Ouachtak, Naima Hafid, Amane Jada, Abdelaziz Ait Addi
Summary: A novel adsorbent design method of sepiolite was developed by organic surface modification and carbonization, and the obtained carbon@sepiolite composites exhibited excellent adsorption properties for the removal of malachite green dye from water. Various characterization techniques confirmed the successful synthesis and good adsorption capacity of the composites. The adsorption behavior of malachite green molecules on the modified sepiolite surface was well described by kinetic and equilibrium models, suggesting a homogeneous monolayer adsorption. The thermodynamic analysis indicated the spontaneous and endothermic nature of the adsorption process. Overall, this work provides a facile approach for the design of organically modified sepiolite as efficient adsorbents for waste recycling.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Food Science & Technology
Monica Sanchez-Gutierrez, Isabel Bascon-Villegas, Alejandro Rodriguez, Fernando Perez-Rodriguez, Africa Fernandez-Prior, Antonio Rosal, Elena Carrasco
Summary: This study obtained extracts from olive leaves using two extraction methods and six solvents, revealing that the water MAE extract showed strong antimicrobial activity. The predominant compound in the extracts was oleuropein, and the extraction method influenced the total phenol content.
Article
Engineering, Chemical
Gisella O. Coelho, Michelle J. A. Batista, Antonio F. Avila, Adriana S. Franca, Leandro S. Oliveira
Summary: The research focuses on the development of biopolymeric film primarily made of galactomannans recovered from spent coffee grounds. It was found that cellulose significantly impacts the mechanical properties and water vapor permeability of the film, but removing part of the cellulose resulted in a film with different properties. The study highlights the potential of galactomannans in creating biodegradable packaging materials.
JOURNAL OF FOOD ENGINEERING
(2021)
Article
Food Science & Technology
Andreia H. Suzuki, Leandro S. Oliveira, Adriana S. Franca
Summary: The study confirmed the impact of fruit variety on enzymatic browning and found that different apple varieties showed distinct responses to polyvinyl chloride active films in preventing browning. For Red Delicious apples, all films were effective in reducing browning, with ascorbic acid being the most effective, while none of the films could prevent browning in Granny Smith apples. Additionally, protective effects were observed for certain phenolics in both apple varieties, indicating the efficacy of the produced films in controlling browning.
FOOD AND BIOPROCESS TECHNOLOGY
(2021)
Article
Food Science & Technology
Ana Leticia Rodrigues Costa, Andresa Gomes, Lais Brito Cangussu, Rosiane Lopes Cunha, Leandro Soares de Oliveira, Adriana Silva Franca
Summary: The effects of cellulose nanocrystals (CNC) and sunflower proteins (SFP) as stabilizers on the interfacial behavior and physicochemical properties of oil-in-water emulsions were studied. It was found that the mixture of these stabilizers prevented both creaming and droplet coalescence, providing a better understanding of the stabilization mechanisms of O/W emulsions.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Food Science & Technology
Pamella Fronza, Ana Leticia Rodrigues Costa, Adriana Silva Franca, Leandro Soares de Oliveira
Summary: This study aims to extract starch from cassava peels and characterize its properties. The extracted starch has desirable composition and physical properties, making it suitable for various food applications.
Review
Food Science & Technology
Adriana S. Franca, Leandro S. Oliveira
Summary: Spent coffee grounds are generated worldwide in large quantities, mainly disposed of in landfills or for energy recovery, which may result in greenhouse gas and toxic emissions. However, the grounds contain various compounds that can be recovered and used in applications such as biofuels, cosmetics, and food ingredients.
Article
Food Science & Technology
Veronica Belchior, Bruno G. Botelho, Adriana S. Franca
Summary: In this study, NIR and FTIR spectroscopy were compared to distinguish the quality and sensory characteristics of specialty coffee samples. PLS models were built to accurately predict the scores of the samples based on chemical bonds and sensory aspects.
Article
Food Science & Technology
William Cardoso Lima, Leandro S. Oliveira, Adriana S. Franca
Summary: This study developed a low-cost adsorbent with a chemically modified surface bearing sulfonic groups using sunflower crop residue, which showed advantages in adsorption of phenylalanine. Optimization results indicated a higher adsorption capacity under specific conditions.
Article
Food Science & Technology
Lais M. Resende, Adriana S. S. Franca
Summary: The peel of jabuticaba, a fruit native to Brazil, has potential as a source of antioxidants and dietary fibers. Different extraction methods were used, with enzyme-assisted extractions yielding higher pectin yields and better emulsifying performance. Jabuticaba peel pectins had good emulsifying properties and high swelling capacity.
Article
Biochemistry & Molecular Biology
Ramon Alves de Oliveira Paula, Carina de Souza Gondim, Eduardo Morgado Schmidt, Maria Helena Glicerio Marcelina Diniz, Mary Ane Goncalves Lana, Leandro Soares de Oliveira
Summary: This study optimized and validated two multianalyte methods for the qualitative detection of veterinary drugs and antimicrobials in bovine muscle tissues. Both methods showed satisfactory selectivity, with the QuEChERS method yielding higher sample recovery. The results demonstrate the potential application of these methods in routine food analysis by official laboratories, enhancing the control of veterinary drug residues in the country.
Article
Food Science & Technology
Lais M. Resende, Leandro S. S. Oliveira, Adriana S. S. Franca
Summary: Jabuticaba peels contain significant amounts of bioactive compounds, mainly phenolics. Conventional methods for quantification have limitations and may not reflect the actual antioxidant potential. Analytical methods like HPLC are more appropriate for specific phenolics quantification and can be used to predict compound amounts using FTIR. The study evaluated the composition of specific polyphenols in jabuticaba peel flours and used FTIR coupled with chemometrics to predict their concentrations.
Article
Food Science & Technology
Michelle J. P. A. Batista, M. Betania F. Marques, Adriana S. Franca, Leandro S. Oliveira
Summary: Most polymeric materials are synthetic and derived from petroleum, leading to accumulation in landfills or the ocean. Researchers are exploring biodegradable materials from renewable sources to replace them. Spent coffee grounds, which are rich in organic compounds like polysaccharides, could be used to produce films. Two types of crosslinking were performed: coordination bonds with calcium ions and covalent bonds with 1,4-phenylenediboronic acid (PDBA). The films showed promising properties, with improved water barrier and tensile strength for the Ca2+ ion crosslinked films, and higher moisture content and water vapor permeability for the PDBA crosslinked films.
Article
Materials Science, Multidisciplinary
Washington Moreira Cavalcanti, Leandro Soares de Oliveira, Romulo Maziero, Juan Carlos Campos Rubio
Summary: The feasibility of using epoxidized waste cooking oils as a partial replacement for synthetic resins in manufacturing lignocellulosic composites was investigated. The study found that the introduction of wood particles did not improve the mechanical properties of the cured blend of epoxy resins, but the produced particleboards still met the standards for physical and mechanical properties.
