Article
Chemistry, Physical
Yong Yang, Xin Cao, Lifen Shi, Zhengyi Zhang, Pingping Wang, Jinwei Li, Yangshan Sun, Shuyong Chen, Tianhe Wang, Liyun Ma, Shou Peng
Summary: The study systematically investigated the effects of heat treatment on the structure and properties of Cs-containing glass-ceramics, providing a practical method for immobilizing Cs in pollucite-base glass-ceramics. Experimental results showed that the optimum crystallization temperature for pollucite is around 1000 degrees C, with pollucite being the main crystalline phase.
JOURNAL OF MATERIOMICS
(2021)
Article
Environmental Sciences
Keunyoung Lee, Jimin Kim
Summary: This study suggests that the entire medium is converted into amorphous aluminosilicate at a relatively low temperature, with cesium partially and preferentially converted into pollucite. Cesium plays a role in initiating the nucleation of pollucite and lowers the system's eutectic point. The stability of radioactive cesium is confirmed through X-ray absorption spectroscopy and sintering experiments, making this method a potential solution for immobilizing cesium.
ENVIRONMENTAL RESEARCH
(2023)
Article
Materials Science, Ceramics
Hualong Yang, Siqi Ma, Wenjiu Duan, Shengjian Zhao, Qikun Wang, Xuehui Liu, Yuqi Jiang, Peigang He, Xiaoming Duan, Dechang Jia, Yu Zhou
Summary: Molecular dynamics simulations were conducted to investigate the structure and ion diffusion properties of pollucite glass-ceramics with alkali metal cations dopants. The resistance to volume deformation is influenced by the size of the alkali metal cations, while shear deformation is minimally affected. Compared to pollucite, the glass phase exhibits broader bond length and bond angle distributions, and the local environment of Si/Al is not influenced by the type of alkali metal cations. The self-diffusion coefficient of Cs cations in the glass phase is lower than that of smaller alkali metal cations and is further reduced with the introduction of Na/Li.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Shuqing Fang, Yangshan Sun, Liang Feng, Qi Liu, Zhengyi Zhang, Na Han, Pingping Wang, Yuxiao Zhou, Jing Wang, Chong Zhang, Tianhe Wang
Summary: This article reports a novel method for immobilization of Cs-137 by sintering Cs-polluted soil and borosilicate glass powder to form a pollucite-based glass crystalline material. The method shows lower formation temperatures and improved chemical durability compared to conventional sintering methods. This study not only presents an improved technique for Cs-137 immobilization but may also provide a methodology for immobilization of other potential radioactive species.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Jiang Ma, Zhiwei Fang, Xiaoyong Yang, Bo Wang, Fen Luo, Xiaoli Zhao, Xiaofen Wang, Yushan Yang
Summary: The study proposes the use of a hollandite-perovskite ceramic matrix as a potential host for immobilization of separated Cs and Sr from high-level waste streams, demonstrating excellent chemical durability in experimental testing. The synthesized composite ceramics have shown effective immobilization of Cs and Sr elements, indicating their potential as a customized host matrix for HLW immobilization.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Analytical
Yaxin Feng, Guilin Wei, Yi Liu, Zhentao Zhang, Meng Yan, Xiyang He, Yulong Miao, Beilong Yuan, Yuchuan Zhang, Zihui Ban, Zhanrong Song, Xirui Lu
Summary: This study presents a low-temperature immobilization method for converting radioactive cesium waste into pollucite. The synthesized pollucite, composed of lamellar particles and agglomerates of small particles, shows uniform distribution of Cs, Al, Si, O elements on the surface. Furthermore, the analysis indicates high immobilization efficiency (99.24%) and low leaching rate of Cs (on the order of 10(-3) g/(m(2) .d)).
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Hualong Yang, Siqi Ma, Shengjian Zhao, Qikun Wang, Xuehui Liu, Peigang He, Dechang Jia, Yu Zhou
Summary: Pollucite is considered as an ideal material for safe trapping of Cs-137 radionuclide, thanks to its remarkable chemical stability. The hydrolysis of Si/Al-O bonds in pollucite is thermodynamically unfavorable, with Al-O bonds being the weak points. The migration barriers of Cs+ in pollucite are high, indicating its stable immobilization capacity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Construction & Building Technology
Shubham Jain, Nemkumar Banthia, Tom Troczynski
Summary: This study investigated the effects of cesium dosage and curing time on the immobilization of Cs in NaOH-activated fly ash-based geopolymers. The results showed that higher Cs dosage and longer curing time enhanced the immobilization of Cs, and diffusion was identified as the primary leaching mechanism.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Materials Science, Multidisciplinary
M. Arbel-Haddad, Y. Harnik, Y. Schlosser, A. Goldbourt
Summary: Geopolymers are a promising option for immobilizing nuclear waste, particularly radioactive cesium. The study found that cesium ions preferentially bind to zeolite F, and zeolite F is more efficient in immobilizing cesium compared to other crystalline or amorphous phases.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Ceramics
Qi Liu, Liang Feng, Yangshan Sun, Shuqing Fang, Zhengyi Zhang, Na Han, Jing Wang, Chong Zhang, Tianhe Wang
Summary: In this study, a CsAlSi2O6-based glass-ceramic was prepared by sintering Cs-polluted soil and phosphate glass. Optimum glass addition was determined through extensive experiments and characterizations using XRD, DSC, SEM, and EDS. CsAlSi2O6 was formed at a significantly lower temperature (approximately 900 degrees C) compared to conventional sintering methods for Cs-pollucite. Raman spectroscopy and SEM studies confirmed the immobilization of Cs+ in the crystalline structure of CsAlSi2O6, with the crystals being encapsulated in the glass matrix. When the addition of phosphate glass was 10 wt%, the leaching rate was lowest (3.35 x 10-4 g m-2 d-1) and the bending strength was the highest (30 MPa). This study provides a potential alternative and useful data for the safe processing of radioactive waste at a relatively low temperature.
CERAMICS INTERNATIONAL
(2023)
Article
Construction & Building Technology
Wei Chen, Alicia C. Garofalo, Haining Geng, Yan Liu, Dongwen Wang, Qiu Li
Summary: This study prepared cesium-activated geopolymer composites with cordierite reinforcements and evaluated their high temperature performance. The addition of cordierite increased the compressive strength and residual compressive strength of the composites, and resulted in a sintering and crystallization process of the obtained ceramics. This improved performance makes the ceramic composites excellent for heat resistance applications.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Materials Science, Ceramics
Yang He, Xiaoyan Shu, Lingshuang Li, Mingfen Wen, Guilin Wei, Yuexiang Lu, Yi Xie, Faqin Dong, Shunzhang Chen, Kuibao Zhang, Xirui Lu
Summary: Based on the chemical composition and secondary diagenetic property, a natural aluminosilicate was proposed as an immobilization matrix for the simulated An3+ waste (Nd2O3). Sintering at 1500 degrees C for 6 h was found to be a prerequisite for the preparation of the waste form. The glass-ceramic structure-dominated waste form can achieve a loading content of 16 wt.% Nd2O3.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Environmental Sciences
Takahiro Tatsuno, Hiromichi Waki, Minato Kakuma, Naoto Nihei, Tsugiko Takase, Toshihiro Wada, Kazuya Yoshimura, Takahiro Nakanishi, Nobuhito Ohte
Summary: This study investigated the effect of radioactive cesium-rich microparticles (CsMPs) on the particulate RCs concentration and Kd in two rivers (Takase River and Kami-Oguni River) flowing through watersheds with different contaminated levels in Fukushima Prefecture. CsMPs may enter rivers through soil erosion, and the proportion of CsMPs in particulate RCs was higher in the Kami-Oguni River than in the Takase River during flood events. However, the overall contribution of CsMPs to the RCs concentrations in river waters during the flood event was not significant when evaluated throughout the event.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Materials Science, Multidisciplinary
Hyun Woo Kang, Jung-Hoon Choi, Ki Rak Lee, Hwan-Seo Park
Summary: The study developed a glass matrix for immobilizing radioactive iodine by incorporating transition metal oxides. The loading of iodine in the matrix was around 13-15% by weight, and the elements were retained without significant loss after melting the glass mixtures at 800 degrees C for 1 hour. The addition of WO3, MoO3, and V2O5 suppressed the release of iodine by densifying the TeO4 polyhedra.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
D. C. Lago, A. D. Sanchez, M. O. Prado
Summary: The immobilization of Cs-137 serves different purposes, such as reducing thermal loading of glass and increasing waste loading capacity, as well as producing radioactive sealed sources for industrial and medical applications. Spent nuclear fuel is the most important radioactive waste in the nuclear fuel cycle. Vitrification is the main technology used to immobilize these wastes, providing structural stability, thermal shock resistance, and high chemical durability.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Engineering, Environmental
Xinping Zhang, Yuxin Guo, Xiaoyang Liu, Shun-Yu Wu, Ya-Xuan Zhu, Shao-Zhe Wang, Qiu-Yi Duan, Ke-Fei Xu, Zi-Heng Li, Xiao-Yu Zhu, Guang-Yu Pan, Fu-Gen Wu
Summary: This study develops a nanotrigger HCFT for simultaneous photodynamic therapy and light-triggered ferroptosis therapy. The nanotrigger can relieve tumor hypoxia, induce enhanced photodynamic reaction, and facilitate the continuation of Fenton reaction, ultimately leading to lethal ferroptosis in tumor cells.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Olumide Bolarinwa Ayodele, Toyin Daniel Shittu, Olayinka S. Togunwa, Dan Yu, Zhen-Yu Tian
Summary: This study focused on the semihydrogenation of acetylene in an ethylene-rich stream using two alloyed Pt catalysts PtCu and PtCo. The PtCu catalyst showed higher activity and ethylene yield compared to PtCo due to its higher unoccupied Pt d-orbital density. This indicates that alloying Pt with Cu is more promising for industrial relevant SHA catalyst.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Guowei Chen, Wen-Cheng Chen, Yaozu Su, Ruicheng Wang, Jia-Ming Jin, Hui Liang, Bingxue Tan, Dehua Hu, Shaomin Ji, Hao-Li Zhang, Yanping Huo, Yuguang Ma
Summary: This study proposes an intramolecular dual-locking design for organic luminescent materials, achieving high luminescence efficiency and performance for deep-blue organic light-emitting diodes. The material also exhibits unique mechanochromic luminescence behavior and strong fatigue resistance.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Joren van Stee, Gregory Hermans, Jinu Joseph John, Koen Binnemans, Tom Van Gerven
Summary: This work presents a continuous solvent extraction method for the separation of cobalt and nickel in a millifluidic system using Cyphos IL 101 (C101) as the extractant. The optimal conditions for extraction performance and solvent properties were determined by investigating the effects of channel length, flow rate, and temperature. The performance of a developed manifold structure was compared to a single-channel system, and excellent separation results were achieved. The continuous separation process using the manifold structure resulted in high purity cobalt and nickel products.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Yan Xu, Jingai Jiang, Xinyi Lv, Hui Li, Dongliang Yang, Wenjun Wang, Yanling Hu, Longcai Liu, Xiaochen Dong, Yu Cai
Summary: A programmed gas release nanoparticle was developed to address the challenges in treating diabetic infected wounds. It effectively removes drug-resistant pathogens and remodels the wound microenvironment using NO and H2S. The nanoparticle can eliminate bacteria and promote wound healing through antibacterial and anti-inflammatory effects.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Tong Xia, Zhilin Xi, Lianquan Suo, Chen Wang
Summary: This study investigated a highly efficient coal dust suppressant with low initial viscosity and high adhesion-solidification properties. The results demonstrated that the dust suppressant formed a network of multiple hydrogen bonding cross-linking and achieved effective adhesion and solidification of coal dust through various chemical reactions.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jinzhi Cai, Zhenshan Li
Summary: A density functional theory-based rate equation was developed to predict the gas-solid reaction kinetics of CaO carbonation with CO2 in calcium looping. The negative activation energy of CaO carbonation close to equilibrium was accurately predicted through experimental validation.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jianxiong Chen, Fuhao Ren, Ningning Yin, Jie Mao
Summary: This study presents an economically efficient and easily implementable surface modification approach to enhance the high-temperature electrical insulation and energy storage performance of polymer dielectrics. The self-assembly of high-insulation-performance boron nitride nanosheets (BNNS) on the film surface through electrostatic interactions effectively impedes charge injection from electrodes while promoting charge dissipation and heat transfer.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Zijian Li, Zhaohui Yang, Shao Wang, Hongxia Luo, Zhimin Xue, Zhenghui Liu, Tiancheng Mu
Summary: This study reports a strategy for upgrading polyester plastics into value-added chemicals using electrocatalytic methods. By inducing the targeted transfer of *OH species, polyethylene terephthalate was successfully upgraded into potassium diformate with high purity. This work not only develops an excellent electrocatalyst, but also provides guidance for the design of medium entropy metal oxides.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Navneet Singh Shekhawat, Surendra Kumar Patra, Ashok Kumar Patra, Bamaprasad Bag
Summary: This study primarily focuses on developing a sulphur dyeing process at room temperature using bacterial Lysate, which is environmentally friendly, energy and cost effective, and sustainable. The process shows promising improvements in dye uptake and fastness properties.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Dengjia Shen, Hongyang Ma, Madani Khan, Benjamin S. Hsiao
Summary: This study developed cationic PVC nanofibrous membranes with high filtration and adsorption capability for the removal of bacteria and hexavalent chromium ions from wastewater. The membranes demonstrated remarkable performance in terms of filtration efficiency and maximum adsorption capacity. Additionally, modified nanofibrous membranes were produced using recycled materials and showed excellent retention rates in dynamic adsorption processes.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Xiaoyan Wang, Zhikun Wang, Ben Jia, Chunling Li, Shuangqing Sun, Songqing Hu
Summary: Inspired by photosystem II, self-supported Fe-doped NiCoP nanowire arrays modified with carboxylate were constructed to boost industrial-level overall water splitting by employing the concerted proton-coupled electron transfer mechanism. The introduction of Fe and carboxyl ligand led to improved catalytic activity for HER and OER, and NCFCP@NF exhibited long-term durability for overall water splitting.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Pengyao Yu, Ge Yang, Yongming Chai, Lubomira Tosheva, Chunzheng Wang, Heqing Jiang, Chenguang Liu, Hailing Guo
Summary: Thin LTA zeolite membranes were prepared through secondary growth of nano LTA seeds in a highly reactive gel, resulting in membranes with superior permeability and selectivity in gas separation applications.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Baiqin Zhou, Huiping Li, Ziyu Wang, Hui Huang, Yujun Wang, Ruichun Yang, Ranran Huo, Xiaoyan Xu, Ting Zhou, Xiaochen Dong
Summary: The use of machine learning to predict the performance of specific adsorbents in phosphate adsorption shows great promise in saving time and revealing underlying mechanisms. However, the small size of the dataset and insufficient detailed information limits the model training process and the accuracy of results. To address this, the study employs a fuzzing strategy that replaces detailed numeric information with descriptive text messages on the physiochemical properties of adsorbents. This strategy allows the recovery of discarded samples with limited information, leading to accurate prediction of adsorption amount, capacity, and kinetics. The study also finds that phosphate uptake by adsorbents is generally through physisorption, with some involvement of chemisorption. The framework established in this study provides a practical approach for quickly predicting phosphate adsorption performance in urgent scenarios, using easily accessible information.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Paula Alejandra Lamprea Pineda, Joren Bruneel, Kristof Demeestere, Lisa Deraedt, Tex Goetschalckx, Herman Van Langenhove, Christophe Walgraeve
Summary: This study evaluates the use of four esterified fatty acids and three vegetable oils as absorption liquids for hydrophobic VOCs. The experimental results show that isopropyl myristate is the most efficient liquid for absorbing the target VOCs.
CHEMICAL ENGINEERING JOURNAL
(2024)