Article
Engineering, Environmental
Yanbing Sun, Jianfa Chen, Yixiao Kang, Haoyan Zhang, Yulin Ge, Nan Yuan, Yubo Xing, Wei Ma, Zhen Yang, Liping Zou, Liang Lu
Summary: In this study, an ultralight carbon aerogel material (CUCA/MPCs) derived from chitosan and MOFs was successfully prepared, and an adsorbent (CUCA/ MPCs-PO4) with a high chelation ability to U(VI) was synthesized through phosphorylation modification. The maximum adsorption capacities of the adsorbents for U(VI) were determined using the Langmuir isotherm model and pseudo-second-order kinetic model. Furthermore, the recyclability and potential practical applications of the adsorbents were evaluated.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Ting Xiong, Qichen Li, Keding Li, Yong Zhang, Wenkun Zhu
Summary: The environmental pollution problem caused by nuclear energy development, particularly water pollution, has become a research hotspot. MgO-N aerogels prepared by a simple template-assisted calcination method exhibited a good 3D porous structure and high adsorption capacity, making them suitable for removing U(VI) and guiding the design of new materials.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Mingyue Ma, Zhenxiong Ye, Jie Zhang, Youbin Wang, Shunyan Ning, Xiangbiao Yin, Toyohisa Fujita, Yanliang Chen, Hanyu Wu, Xinpeng Wang
Summary: This study successfully designed and synthesized MnO2@CTS composite aerogel beads for efficient removal of uranium-containing wastewater. These aerogel beads exhibited convenient separation properties, remarkable mechanical strength, and high adsorption performance, highlighting their substantial potential for addressing U(VI) contamination in wastewater.
Article
Chemistry, Applied
Ying Wang, Yanxiang Li, Yaopeng Zhang, Zhen Zhang, Yanqing Li, Wangliang Li
Summary: Cellulose nanofibers aerogel with high metal-chelating capacity and selective uranium adsorption ability was successfully prepared via a simple method in this study. The aerogel showed excellent regeneration ability and potential for efficient biomass-based adsorbents development.
CARBOHYDRATE POLYMERS
(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
Engineering, Chemical
Jiaqi Yu, Jun Wang, Jiahui Zhu, Ying Li, Qi Liu, Jing Yu, Rumin Li, Peili Liu, Hongsen Zhang
Summary: Chitosan-based hydrogels have been extensively studied as adsorption materials due to their abundant, biodegradable, inexpensive features and rich amino and hydroxyl groups. In this work, the structure of chitosan hydrogel and its adsorption performance towards uranyl species were comprehensively investigated. The results show that chitosan hydrogel exhibits excellent adsorption performance for low-concentration uranyl species, with a removal efficiency of over 99%. The adsorption mechanisms for different uranyl species were also explored.
Article
Environmental Sciences
Yun Wang, Xuewen Hu, Yuting Liu, Yang Li, Tu Lan, Changfu Wang, Yan Liu, Dingzhong Yuan, Xiaogang Cao, Houjun He, Limin Zhou, Zhirong Liu, Jia Wei Chew
Summary: The study presented the preparation and characterization of an ultralight 3D porous amidoxime functionalized graphene oxide nanoribbons aerogel (PAO/GONRs-A) for the selective removal of uranium from water samples. The adsorbent exhibited high nitrogen content, low density, and large specific surface area, with excellent adsorption capacity and selectivity for uranium. Adsorption experiments showed a pH-dependent, spontaneous and endothermic process, with optimal fitting to pseudo-second-order kinetic model and Langmuir isotherm model.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Chemical
Jia Yin, Sen Yang, Weiwei He, Tongxin Zhao, Chengqi Li, Daoben Hua
Summary: The study developed an aerogel using a co-imprinting method for the simultaneous selective removal of uranium(VI) and strontium(II) from radioactive effluents. The aerogel showed excellent adsorption performance in highly saline low level radioactive effluents, and has promising applications in the field.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Zhihui Wang, Yanfei Wang, Chen Yao
Summary: The study synthesized Polyethyleneimine modified magnetic chitosan (MCS-PEI) successfully, with high adsorption capacity and chemical adsorption properties. Thermodynamic studies showed spontaneous and exothermic adsorption process, while the adsorption rate remained stable with a slight decrease.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Chemistry, Analytical
Zhihui Wang, Yanfei Wang, Chen Yao
Summary: Chitosan, when modified, shows promising potential as a water treatment agent due to its ability to adsorb pollutants, especially in uranium-containing wastewater treatment. Different modification methods have their own advantages and disadvantages, and the selection of a suitable method should be based on specific situations.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Yan Li, Ying Dai, Qinqin Tao, Zhi Gao, Lei Xu
Summary: In this study, amino acids-modified magnetic chitosan adsorbents were successfully used for the removal of uranium from wastewater, showing high adsorption capacity and efficient solid-liquid separation.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Engineering, Environmental
Ting Xiong, Qichen Li, Jun Liao, Yong Zhang, Wenkun Zhu
Summary: HAP aerogel synthesized with konjac gum as template exhibited superior adsorption efficiency and capacity for uranium, attributed to its optimized pore structure and particle distribution. The immobilization of uranium on HAP aerogel was achieved through the formation of Ca(UO2)(2)(PO4)(2)center dot 3H(2)O, indicating a promising application in the treatment of uranium-containing wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Polymer Science
Katerina Philippou, Christos N. Christou, Vlad Socoliuc, Ladislau Vekas, Eugenia Tanasa, Marinela Miclau, Ioannis Pashalidis, Theodora Krasia-Christoforou
Summary: Magnetoactive electrospun fibrous membranes composed of PVP, CS, and pre-fabricated OA.OA.Fe3O4 nanoparticles were successfully used for the removal of uranium from aqueous solutions. The inclusion of Fe3O4 NPs was found to enhance the adsorption efficiency of U(VI) from aquatic environments, with stable relative adsorption percentages and decreased desorption percentages observed after regeneration and reuse experiments.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Environmental
Hongtao Xia, Qi Ren, Jianqi Lv, Yang Wang, Zihao Feng, Yang Li, Changfu Wang, Yan Liu, Yun Wang
Summary: An innovative chitosan/graphene oxide composite containing phytic acid (PCG) was synthesized for the removal of uranium (VI) from aqueous solutions. PCG possessed flaky surface porous structure, good thermal stability, and strong chelating ability to uranium (VI). The adsorption process of PCG followed the Langmuir isothermal and pseudo-second-order kinetic models, with a maximum adsorption capacity of 325.56 mg/g at pH 5.0. PCG exhibited higher adsorption selectivity due to the strong chelating of its hydroxyl and phosphate groups with uranium (VI). With its easy synthesis, solid-liquid separation, biocompatibility, and negligible toxicity, PCG can effectively recover uranium (VI) from wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Analytical
Zhihui Wang, Yanfei Wang, Chen Yao
Summary: In this study, a new material composed of chitosan (CS) and hexachlorocyclotriphosphazene (HP) was synthesized with polyphosphoric acid as the cross-linking agent to effectively remove uranium(VI) from aqueous solution. The material exhibited high adsorption capacity and efficiency, fitting well with various kinetic and thermodynamic models, with superior reusability. This research demonstrates that CS-HP is a highly efficient and sustainable material for uranium(VI) removal from aqueous solutions.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
