Article
Chemistry, Physical
Lirong Zhong, Feiqiang He, Ziwei Liu, Beibei Dong, Jianhua Ding
Summary: The study prepared amidoxime modified polyacrylic acid microcrystalline cellulose adsorbent MC-PAA-AO, which showed excellent adsorption performance for removing U(VI) from aqueous solution. The adsorbent exhibited good adsorption capacity, recyclability, and superior selectivity in the removal of U(VI).
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Chemical
Xuchen Tao, Yinchun Fang
Summary: In this study, a novel amidoxime calixarene fiber (ACF) was prepared and found to be effective for adsorbing hexavalent uranium. The ACF was characterized and its adsorption performance was investigated, resulting in the determination of optimal adsorption conditions and mechanisms.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Zhen Zhang, Xinglei Wang, Jingbo Zhou, Hongxia Zhang, Fei Wu, Wangsuo Wu
Summary: Efficient recovery of uranium from seawater is crucial for future nuclear fuel demand. In this study, a new Alg/PAO hydrogel microspheres adsorbent was prepared by self-assembly method and demonstrated high uranium adsorption capacity and selectivity. Batch experiments showed that the adsorption of U(VI) on Alg/PAO hydrogel microspheres followed pseudo second-order kinetic model and Langmuir model.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Chao Gao, Jixue Sui, Kang Chen, Zongyuan Chen, Wangsuo Wu, Zhijun Guo
Summary: The study demonstrates that nZVI can effectively remove U(VI) from strongly alkaline solutions in anaerobic conditions, with a reduction efficiency of up to 95.5%, but the efficiency drops significantly in aerobic conditions due to oxidation and desorption processes. This offers new insights into the mechanisms of U(VI) interactions with nZVI in alkaline media and provides a potential approach for uranium recovery from spent nZVI.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Xiaoyang Liu, Shuibo Xie, Guohua Wang, Xin Huang, Yi Duan, Haiyan Liu
Summary: This study evaluated the removal efficiency of U(VI) using an environmentally sensitive amidoxime hydrogel (AO-NIAMP). The results showed that AO-NIAMP is sensitive to temperature and pH, has a high adsorption capacity for uranium, and can stably remove multiple interfering metal ions. The primary mechanisms of U(VI) removal by AO-NIAMP are chelation of functional groups and electrostatic interactions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Nanoscience & Nanotechnology
Ye Sun, Rongrong Liu, Shunxi Wen, Jiawen Wang, Lin Chen, Bingjie Yan, Shuyi Peng, Chao Ma, Xingyu Cao, Chunxin Ma, Gaigai Duan, Hui Wang, Se Shi, Yihui Yuan, Ning Wang
Summary: An antibiofouling ultrathin poly(amidoxime) membrane (AUPM) with highly enhanced uranium (U) adsorption performance was developed by incorporating quaternized chitosan (Q-CS) and poly(amidoxime) in a cross-linked sulfonated cellulose nanocrystals (S-CNC) network. The AUPM demonstrated excellent U recovery efficiency in low-concentration U-added pure water and seawater, along with a superior antibiofouling property. This novel membrane showed promising potential for large-scale U-recovery, providing a convenient and universal strategy for fabricating highly efficient and cost-effective U-adsorbents.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Kaifu Yu, Yi Li, Xin Cao, Ruixiang Wang, Li Zhou, Linzhen Wu, Ningning He, Jia Lei, Dengjiang Fu, Tao Chen, Rong He, Wenkun Zhu
Summary: In this study, amidoxime-rich g-C3N4 material was successfully synthesized for photo-assisted uranium extraction from seawater. The material exhibited excellent photocatalytic activity and antibacterial properties, overcoming the limitation of uranium extraction caused by marine biofouling.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Xiaoxia Ye, Ruiyang Chi, Zhihao Wu, Jinteng Chen, Yuancai Lv, Chunxiang Lin, Yifan Liu, Wei Luo
Summary: There are approximately 4 billion tons of uranium in the ocean, but extracting uranium from seawater is challenging due to the low concentration of uranium and high salinity. In this study, a new uranium extraction material called CGPA was designed by grafting phosphoric acid and amidoxime groups onto collagen fibers. CGPA showed high adsorption capacity, selectivity, and reusability for uranium, and achieved a high extraction rate of 90.1% in seawater extraction experiments.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Applied
Jianwei Bai, Shuhui Li, Xiaofei Ma, Huijun Yan, Shouzheng Su, Shuang Wang, Jun Wang
Summary: A series of novel amidoxime-functionalized porous polymeric adsorbents were synthesized using a simple knitting synthetic strategy, showing good uranium adsorption capacity and reusability. The materials provide a potential approach for synthesizing novel porous materials with practical applications.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
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
Chemistry, Physical
Fenglei Liu, ZhengFeng Hu, Miao Xiang, Baowei Hu
Summary: In this study, Fe3O4 nanoparticles were incorporated into amidoxime-functionalized Ti3C2 to form a novel magnetic MXenes composite (Fe3O4@Ti3C2-PDA/OA) for the removal of radionuclides from simulated radioactive wastewater. The adsorption performance of the composite was investigated under different conditions, and the results showed that Fe3O4@Ti3C2-PDA/OA had much higher adsorption capacity for U(VI) and Th(IV) compared to traditional adsorption materials. The mechanism of adsorption was found to be through complexation of hydroxyls and amidoxime groups on the surface of the composite with U(VI) and Th(IV). This study demonstrates the potential of MXenes-based composites in the remediation of radioactive ions.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Chemical
Fan Wang, Jingbo Zhou, Xinglei Wang, Yiyao Sui, Weitao Fan, Hongxia Zhang
Summary: With the development of nuclear power, extracting uranium from seawater has become a grand task due to the depletion of uranium resources on land. Synthesis of highly efficient and selective adsorbents is crucial for this task. The adsorption of U(VI) by the copolymers strongly depended on ionic strength and pH, fitting well with pseudo-second-order model and Langmuir model. Possible binding mechanisms involved uranyl with oxime O and amino nitrogen by bidentate coordination model or through bidentate coordination of oxime O, amino N and imidazole N.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Mingzhu Cui, Siyu Xiang, Siyu Zhang, Ting Long, Zhenghang Luo, Haijun Yang
Summary: This paper synthesized PCCP-AO adsorbent and characterized its properties, showing higher adsorption capacity, faster adsorption rate, and better selectivity compared to PCCP. In addition, PCCP-AO demonstrated good reusability.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Applied
Qianhong Gao, Minglei Wang, Jianchang Zhao, Mingxing Zhang, Dadong Shao, Jiangtao Hu, Guozhong Wu
Summary: An amidoxime-appended zirconium metal-organic framework was successfully fabricated for efficiently and rapidly removing uranium from aqueous solution. The adsorption process was found to be spontaneous and endothermic. The material showed high adsorption efficiency and selectivity towards uranium, making it a promising candidate for uranium removal in nuclear industry effluents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Engineering, Environmental
Yang Li, Qi Ren, Rong Hua, Hong-Tao Xia, Xu-Xin Li, Ze-Yang Wang, Xuan Fu, Yan-Jun Du, Ze-Yi Yan, Yun Wang
Summary: In this study, a novel highly crosslinked two-dimensional branched network poly (malonamide-amidoxime) difunctional membrane (MAFPM) was reported, which used malonamide-based polymer as the skeleton and chitosan membrane with abundant surface groups as the substrate. The (malonamide-amidoxime) difunctional synergistic strategy was realized by introducing bromoacetonitrile and hydroxylamine oxime. MAFPM-2 showed a remarkable adsorption capacity for uranium (VI) and excellent uranium-selectivity, providing a promising approach for uranium (VI) resource recovery.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Menghui Zhao, Alemtsehay Tesfay Reda, Dongxiang Zhang
Article
Biotechnology & Applied Microbiology
Meng Pan, Dongxiang Zhang, Xiyan Xu, Alemtsehay Tesfay Reda, Jinying Li
Summary: The study demonstrates that the CP-AO electrode shows good UO22+ adsorption efficiency in acidic conditions, with considerable selectivity towards competitive ions and good reusability. The electrosorption mechanisms involve electric field force for moving UO22+ to the electrode surface, resulting in electrodeposition of uranium compounds and formation of electrically neutral substances. This suggests that CP-AO could be a desirable treatment approach for acidic uranium-containing wastewater with promising practical applications.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Engineering, Environmental
Muhammad Zahid, Dongxiang Zhang, Xiyan Xu, Meng Pan, Muhammad Hammad ul Haq, Alemtsehay Tesfay Reda, Wenguo Xu
Summary: Efficient and stable UiO-66NH(2) adsorbents have been successfully synthesized and characterized in this study for iodine gas capture, showing high maximum iodine adsorption capacity and good performance in regeneration and reuse. Experimental results indicate the potential applicability of these new adsorbents for efficient iodine gas capture, with adsorption occurring through both physisorption and chemisorption mechanisms.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Chemical
Alemtsehay Tesfay Reda, Dongxiang Zhang, Xiyan Xu, Meng Pan, Cui Chang, Constantin Muhire, Xiaoru Liu, Jiayi Sun
Summary: Bi@AlCu-PILC is a mesoporous material with high iodine capture capacity and thermal stability, absorbing I2 through chemical bonding and physical adsorption. The stability of iodine-containing material significantly improves after Bi2O3 treatment, indicating the potential application of Bi@AlCu-PILC in vapor iodine capture and final disposal.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Constantin Muhire, Alemtsehay Tesfay Reda, Dongxiang Zhang, Xiyan Xu, Chang Cui
Summary: This review documents the application of metal oxide-based materials for capturing radioactive iodine. It discusses the limitations in operating conditions, adsorption capacities, and long-term immobilization, and explores the advantages and shortcomings of different metal oxides for iodine capture, as well as the effect of metal oxide additives on the low-sintering temperature of iodide waste forms.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Alemtsehay Tesfay Reda, Dongxiang Zhang, Xiyan Xu, Shengyang Xu
Summary: This study reports a novel composite material for vapor iodine capture. The material exhibits high capture capacity and stability, making it a potential iodine storage material in the nuclear industry.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Ruishu Tang, Chang Cui, Dongxiang Zhang, Dagang Li, Jinying Li, Xiyan Xu
Summary: In this study, the air-blowing process of iodine in nitric acid solution was investigated. The results showed that the size of bubbles in the nitric acid solution was smaller than that in water, resulting in a larger gas holdup and a wider bubble distribution. The effect of nitric acid concentration on gas-liquid-phase hydrodynamics became less significant at concentrations exceeding 1 mol/L.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Environmental
Muhammad Hammad ul Haq, Xu Zhang, Fengqi Zhang, Alemtsehay Tesfay Reda, Dongxiang Zhang, Muhammad Zahid, Muhammad Khurram Tufail, Muhire Constantin, Noor Hasaan, Jinying Li, Xiyan Xu
Summary: The study aims to selectively capture uranium (U) and zirconium (Zr) from the waste solution of nuclear fuel rods, in order to avoid resource waste and environmental pollution. By synthesizing an adsorbent with improved mesoporous structure and adsorption ability, effective adsorption of U and Zr was achieved. The adsorbent exhibited considerable adsorption capacity towards U(VI) and Zr(IV), with the adsorption process following the Langmuir isotherm model and chemisorption mechanism.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Chang Cui, Dongxiang Zhang, Muhire Constantin, Alemtsehay Tesfay Reda, Jinying Li, Xiyan Xu
Summary: This work investigates the molecular reaction and dynamic mechanism of iodate reduction by nitrogen(iii) in aqueous solution using ab initio molecular dynamics (AIMD) method. The reaction pathways with and without H+ are proposed and their thermodynamic parameters are calculated. The results show that the reaction pathway with H+ is confirmed based on Gibbs free energy analysis. The molecular reaction dynamics analysis reveals the energy change of the reactant conformations and provides detailed information on nucleophilicity and electrophilicity.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Engineering, Environmental
Alemtsehay Tesfay Reda, Dongxiang Zhang, Xiyan Xu
Summary: LiAlO2-Mel demonstrates high vapor iodine capture capacity and good regeneration ability, with chemisorption playing a critical role and physisorption dominating at lower temperatures.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Review
Engineering, Environmental
Alemtsehay Tesfay Reda, Meng Pan, Dongxiang Zhang, Xiyan Xu
Summary: As energy demand increases, nuclear power plants will remain reliable sources of energy despite the release of toxic byproducts. Bi-based materials have emerged as potential green solutions for iodine uptake and storage to mitigate contamination issues. Factors affecting iodine capture, mechanisms of uptake, and the trend towards developing more efficient bismuth-based adsorbents are discussed in this review.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Alemtsehay Tesfay Reda, Dongxiang Zhang
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2019)