Article
Environmental Sciences
Fang Wang, Jiyun Gao, Lijuan Jia, Shixing Wang, Ping Ning
Summary: In this study, a functionalized chitosan-based adsorbent was synthesized and shown to have strong adsorption capability for copper ions, indicating its practical significance for removing heavy metal copper in wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Applied
Chunzi Xu, Yunlan Xu, Dengjie Zhong, Haixing Chang, Jiaxin Mou, Hui Wang, Hongyu Shen
Summary: The Zr4+ cross-linked chitosan-thiourea composite was synthesized for the first time and showed excellent acid-base resistance, reusability, and high adsorption capacity for Cr(VI) removal.
CARBOHYDRATE POLYMERS
(2022)
Article
Geosciences, Multidisciplinary
Ruiqi Bao, Dongdong Fu, Zhengquan Fan, Xianzhi Peng, Licheng Peng
Summary: This study investigated the aging process of microplastics in simulated seawater and their adsorption capacity for copper. The results showed that aged microplastics have higher sorption abilities and their adsorption capacity is influenced by pH. These findings provide a baseline for further studies on the toxicity of microplastics in combination with heavy metals in the environment.
Article
Agricultural Engineering
Ravi Katiyar, Anil Kumar Patel, Thanh-Binh Nguyen, Reeta Rani Singhania, Chiu-Wen Chen, Cheng-Di Dong
Summary: This study found that seaweed-derived biochar showed high removal efficiency for Cu(II) in water, with Langmuir adsorption isotherm explaining the adsorption mechanisms. This indicates that waste biomass (seaweed) could be a valuable biological resource for removing heavy metals from various water bodies.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Yan Wang, Yong Zhang, Xiaolin Liu, Sen Sun, Shiyi Qin, Jiaqi Huang, Bowei Chen
Summary: In this study, a novel g-C3N4 filled, phosphoric-crosslinked chitosan gel bead (P-CS@CN) was developed for the adsorption of U(VI) from water. The introduction of more functional groups improved the separation performance of chitosan. At pH 5 and 298 K, the adsorption efficiency and capacity reached 98.0% and 416.7 mg g-1, respectively. The P-CS@CN gel bead exhibited excellent applicability in water based on dynamic adsorption experiments. Thermodynamic analyses showed that the adsorption process of U(VI) on P-CS@CN was spontaneous and endothermic.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Environmental Sciences
Fenglei Liu, Shan Hua, Chao Wang, Muqing Qiu, Limin Jin, Baowei Hu
Summary: A bio-adsorbent DACS-CA was developed by immobilizing caffeic acid on dialdehyde corn starch for efficient removal of Cr(VI) from wastewater. Characterization analysis indicated a redox reaction between Cr(VI) and the bio-adsorbent, where Cr(VI) was initially loaded via electrostatic interaction, partially converted into Cr(III), and then immobilized on DACS-CA's carboxyl groups.
Article
Engineering, Environmental
Alusani Manyatshe, Zamani E. D. Cele, Mohammed O. Balogun, Thabo T. Nkambule, Titus A. M. Msagati
Summary: In this study, sugarcane bagasse biochar was used as a biosorbent for the removal of phosphate ions from aqueous solutions. The addition of chitosan and epichlorohydrin enhanced the adsorption capacity of the biochar. The bio-composite showed good adsorption performance and reusability, especially under acidic conditions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Fatiha Mazouz, Soumia Abdelkrim, Adel Mokhtar, Mehdi Zahraoui, Belkadi Abdelmoumene, Souhila Lakhdar Fouatih, Mohammed Abdelkrim Hasnaoui, Abdelkader Bengueddach, Mohamed Sassi, Amal Djelad
Summary: Two types of composites with spherical form were synthesized and evaluated for their removal efficiency of toxic metal ions Cu(II) from aqueous solutions. The CS/Z100%s hybrid microspheres showed the highest adsorption capacity, following a pseudo second order kinetic model with the adsorption isotherm described by Langmuir isotherm.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Environmental Sciences
Thi-Thuy Luu, Van-Phuc Dinh, Quang-Hung Nguyen, Ngoc-Quyen Tran, Duy-Khoi Nguyen, Thien-Hoang Ho, Van-Dong Nguyen, Dong Xuan Tran, H. A. Tuan Kiet
Summary: In this study, red mud modified by chitosan (RM/CS) was found to be an effective adsorbent for removing Pb(II) from aqueous solution, with a significantly increased surface area and high maximum adsorptive capacity. The adsorption process was mainly controlled by intra-diffusion mechanisms, and the interaction between Pb(II) and carbonate groups on the material's surface played a primary role once adsorption equilibrium was reached. The results suggest that RM/CS has potential as a material for removing Pb(II) from aqueous solution.
Article
Biochemistry & Molecular Biology
Perumal Karthikeyan, Sankaran Meenakshi
Summary: A novel and environmentally-friendly chitosan encapsulated magnetic kaolin beads were fabricated and applied for the adsorption of phosphate and nitrate ions from water in this study. The synthesized beads showed promising potential as selective and effective adsorbents for the removal of phosphate and nitrate ions from aqueous solutions.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Environmental Sciences
Yuehui Tan, Xirui Wan, Xue Ni, Le Wang, Ting Zhou, Huimin Sun, Nong Wang, Xianqiang Yin
Summary: A novel chitosan-modified kiwi branch biochar (CHKB) was prepared as a low-cost adsorbent for the removal of Cd (II) from wastewater. The modification significantly improved the adsorption performance of kiwi biochar (KB), with mechanisms including cation exchange, electrostatic interaction, surface complexation, and precipitation involved in the sorption of Cd (II) on CHKB.
Article
Biochemistry & Molecular Biology
Bowei Chen, Ling Ding, Yan Wang, Yong Zhang
Summary: A novel chitosan-based aerogel with swelling resistance was prepared using sol-gel technology. The introduction of resorcinol and g-C3N4 enhanced the stability and adsorption performance of the aerogel for thorium. The results showed outstanding adsorption properties, with a short equilibrium time, fast adsorption rate, high removal efficiency at low concentration, and a large adsorption capacity.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Materials Science, Multidisciplinary
R. Sasirekha, Sekar Vijayakumar, P. Pazhanisamy, J. John Joseph, Thandapani Gomathi
Summary: A quaternary biocomposite consisting of chitosan nanoparticles (CS-NPs), sodium alginate (AL), carboxymethyl cellulose (CMC), and hydroxyapatite (HAP) from fish bones was developed for the removal of copper from aqueous solution. The biocomposite was characterized using FTIR, XRD, and SEM techniques, confirming its formation, physical state, and surface morphology. Batch adsorption studies were conducted by adjusting parameters such as pH, adsorbent dose, contact time, and initial concentration, and the data was assessed using Langmuir and Freundlich isotherm models. The results showed that the biocomposite had a good ability to remove Cu (II) metal ion from aqueous solution.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Ahmed Gamal, Ahmed Galal Ibrahim, Essam M. Eliwa, Adham Hassan El-Zomrawy, Salah M. El-Bahy
Summary: The synthesis of a novel functionalized chitosan (Cs-BT) as an efficient Cu adsorbent in water treatment was successful. Pseudo-first-order kinetics and Temkin isotherm were found to be suitable for explaining the adsorption process.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Polymer Science
Rachid El Kaim Billah, Ikrame Ayouch, Youness Abdellaoui, Zineb Kassab, Moonis Ali Khan, Mahfoud Agunaou, Abdessadik Soufiane, Marta Otero, Byong-Hun Jeon
Summary: A novel polymer bio-composite (CS/n-Hap) consisting of nano-hydroxyapatite (n-Hap) and chitosan (CS) was synthesized for the efficient removal of toxic cadmium ions from water. The CS/n-Hap bio-composite exhibited superior adsorption capacity compared to pristine CS, with a maximum uptake of 126.65 mg/g under optimized conditions. The adsorption mechanism involved the formation of chemical bonds between Cd(II) and CS/n-Hap, as confirmed by the kinetic and thermodynamic studies.
