Article
Chemistry, Applied
Anderson B. Pires, Luciano Vitali, Amanda Tavares, Carlos A. Germano, Suelen M. Amorim, Regina F. P. M. Moreira, Rosely A. Peralta, Ademir Neves
Summary: The study focused on adsorption of Zn(II), Cu(II), and Ni(II) ions using a heptadentate dinucleating ligand anchored to chitosan. The adsorbent was characterized by various spectroscopic and surface area analysis methods, and resulted in a ligand substitution degree of 0.73 in chitosan. Adsorption kinetics followed a pseudo-second-order model, with Cu(II) showing preferential adsorption among the ions studied.
CARBOHYDRATE POLYMERS
(2021)
Article
Biochemistry & Molecular Biology
Magdalena Blachnio, Malgorzata Zienkiewicz-Strzalka, Anna Derylo-Marczewska, Liudmyla V. V. Nosach, Eugeny F. F. Voronin
Summary: A new type of composite material, biopolymer-silica materials, is proposed as selective and effective adsorbents. A new synthesis procedure using geometrical modification of silica and mechanosorption of chitosan is applied to create chitosan-nanosilica composites (ChNS) and chitosan-silica gel composites (ChSG). The adsorption efficiency of ChNS and ChSG towards anionic dyes was analyzed and the results showed that ChNS had faster adsorption kinetics due to the silica-type effect.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Polymer Science
Wenyan Song, Tianfeng Huang, Huajiang Zuo, Dongmei Deng, Chunyi Tang
Summary: Environmentally friendly natural materials, chitosan and tannic acid, were used to prepare a composite membrane for removing manganese from water. The immobilization of Stenotrophomonas maltophilia on the composite membrane improved the removal performance. Optimization of experimental conditions resulted in the best immobilization rate for S. maltophilia. The removal rate of manganese ions reached over 70% under specific conditions.
Article
Chemistry, Inorganic & Nuclear
Vaishnavi Gomase, Ravin Jugade, Priyanka Doondani, D. Saravanan, Sadanand Pandey
Summary: In this study, chitosan was successfully modified by crosslinking and forming a composite with cotton-straw-derived biochar. The modified materials showed enhanced adsorption capacities for Cr(VI) and better stability and surface area.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Tomasz Jozwiak, Urszula Filipkowska
Summary: This study investigated the effectiveness of using hydrogel chitosan sorbents in an unconventional air-lift type loop reactor to remove Reactive Black 5 (RB5) dye from aqueous solutions under dynamic conditions. The choice of chitosan sorbent significantly impacted the volume of wastewater effectively treated, with CHs enabling the treatment of 4.6 liters of solution, and CHs-ECH treating 34.6 liters under the specified conditions.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Patricia Risch, Christian Adlhart
Summary: This study presents the preparation of ultralight chitosan-glutaraldehyde nanofiber sponges for filtration applications. The sponges showed excellent particle adsorption capabilities and significant reduction in turbidity of particle suspensions. This biocompatible filter has potential applications in addressing environmental challenges such as microplastics.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Aiyuan Ma, Xuemei Zheng, Kangqiang Li, Mamdouh Omran, Guo Chen
Summary: The study investigated the regeneration of activated carbon and its effectiveness in removing hazardous substances and organic pollutants. Results showed that regeneration time and temperature significantly influenced the performance of activated carbon, and under optimal conditions, efficient removal of tannic acid was achieved.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Environmental Sciences
Natalia Gabriele Camparotto, Tauany de Figueiredo Neves, Valmor Roberto Mastelaro, Patricia Prediger
Summary: In this study, highly hydrophobic chitosan beads were prepared as adsorbents for removing organic contaminants from water. The chitosan beads exhibited high porosity, large pore space, and excellent hydrophobicity. The beads showed efficient adsorption capacities for sildenafil citrate, basic blue 26 dye, and cetylpyridinium chloride, and were also effective in fixed-bed experiments.
ENVIRONMENTAL RESEARCH
(2023)
Article
Polymer Science
Rossella Sesia, Sara Ferraris, Marco Sangermano, Silvia Spriano
Summary: A new environmentally friendly material, CHg-TA, was developed to remove heavy metal ions with improved adsorption efficiency and properties. CHg-TA showed higher Q(e) under acidic conditions due to TA coordination with copper ions. The performance of CHg was found to be improved in alkaline pH, and TA release can occur in copper solution under strong acidic conditions.
Article
Biochemistry & Molecular Biology
Mihaela D. Leonida, Alice Benzecry, Bisera Lozanovska, Zainab Mahmoud, Ashley Reid, Sabrina Belbekhouche
Summary: This study investigated the effect of adding tannic acid to chitosan matrices encapsulating nisin. Composite materials were prepared using a mild procedure, and the particles were characterized by various methods. The addition of tannic acid enhanced the release of nisin and provided antioxidant activity to the composites. Furthermore, the composites showed synergistic effects against bacteria, especially gram-negative species.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
Casper Van Poucke, Aurele Vandeputte, Sven Mangelinckx, Christian V. Stevens
Summary: In the transition towards the use of renewable resources, using biopolymers with desirable functionalities, such as chitosan derived from natural chitin, is advantageous. However, chitosan's limited solubility in plain water at neutral pH poses a challenge for its biological applicability. Here, we present a green and efficient method to make chitosan plain water-soluble without the need for acidic conditions.
Article
Biochemistry & Molecular Biology
Beata Kaczmarek-Szczepanska, Marta Michalska Sionkowska, Olha Mazur, Joanna Swiatczak, Maria Swiontek Brzezinska
Summary: In this study, chitosan and tannic acid were used to prepare potential packaging materials, which were found to degrade similarly in soil and compost, with 80CTS/20TA showing slightly better degradation in soil compared to 50CTS/50TA. Changes in the chemical structure of the materials after biodegradation were observed, with microbial adhesion affecting the degradation process.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Review
Engineering, Environmental
Hani Ababneh, B. H. Hameed
Summary: This paper provides a comprehensive review on the application of chitosan and its derivatives as materials for oil spill cleanup. Chitosan is a cheap, renewable, and eco-friendly polysaccharide that can be modified to enhance its adsorption capabilities. The paper discusses the different types of chitosan-based materials used in oil spill cleanup and examines the factors that affect the adsorption process.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Polymer Science
Dovile Liudvinaviciute, Ramune Rutkaite, Joana Bendoraitiene, Rima Klimaviciute, Greta Zambzickaite
Summary: The adsorption behavior of CA on CH powder was studied, revealing that with increasing adsorption temperature, the rate of adsorption increased while the amount of adsorbed CA decreased. The Langmuir adsorption model predicted that CA mainly adsorbed on the ionized amino groups of CH.
Article
Biophysics
Usman Rasheed, Qurat Ul Ain, Muhammad Yaseen, Xiaohua Yao, Bin Liu
Summary: The study demonstrated the effective sequestration of various aflatoxins using tannic acid-added pillared bentonite, showing promising potential for the remediation of hazardous pollutants in food and poultry industrial products.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)