Article
Chemistry, Physical
Xue Wang, Hanping Zhang, Quanguo Zhai, Yucheng Jiang, Mancheng Hu, Shuni Li
Summary: High-quality protonated Ni-doped MnO2 nanorods were successfully synthesized and applied to Cs+ adsorption, showing high selectivity and adsorption capacity, especially in neutral media. The high adsorption ability of H-Ni-MnO2 NRs can be attributed to their special morphology, Ni doping, and Mn(III) amount enhancement induced by electrochemical reduction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Jiawei Nie, Ziwei Yao, Penghui Shao, Yunpeng Jing, Langming Bai, Defeng Xing, Genping Yi, Dewei Li, Yanbiao Liu, Liming Yang, Kai Yu, Xubiao Luo
Summary: Manganese dioxide shows great potential for antimony uptake in wastewater. However, its dissolution behavior during antimony adsorption affects the efficiency. Research found that the adsorption of antimony leads to increased dissolution of manganese, providing theoretical guidance for the design of efficient MnO2 adsorbents.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Multidisciplinary Sciences
Motoko Morimoto, Jin Kobayashi, Yasushi Kino
Summary: The Fukushima Daiichi Nuclear Power Plant accident resulted in widespread contamination of radioactive cesium in Japan. Wild boars in the affected area showed decreased radioactive cesium levels compared to immediately after the accident, but still exceeded regulatory limits. The expression of certain genes related to immune response and cell growth were elevated in the small intestines of these wild boars. However, no pathological damage was observed. Long-term monitoring is necessary, but the body's response to the contaminated environment appears appropriate.
SCIENTIFIC REPORTS
(2022)
Article
Green & Sustainable Science & Technology
Lidia Dominguez-Ramos, Ainoha Prieto-Estalrich, Giulio Malucelli, Diego Gomez-Diaz, Maria Sonia Freire, Massimo Lazzari, Julia Gonzalez-Alvarez
Summary: This study analyzes the effect of doping agents in carbon materials on the adsorption and separation of carbon dioxide. The results show that non-activated carbons doped with sulfur exhibit high selectivity and adsorption heat values, making them suitable for carbon dioxide separation from nitrogen mixtures.
Article
Chemistry, Analytical
Tae-Young Kim, Hye-Min Park, Yang-Soo Song, In-Ho Lee, Un-Jang Lee, Jong-Hyuk Yoon
Summary: The study confirmed that illite has good adsorption properties for Cs-137 and Sr-90, with adsorption rates of 94% and 84.26% respectively, after a reaction time of 30 minutes.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Engineering, Environmental
Jung-Weon Choi, Hyun-Kyu Lee, Sang-June Choi
Summary: The composite of magnetic hydroxyapatite coated with manganese dioxide showed excellent Sr2+ removal capacity in aqueous solution, attributed to its large surface area and appropriate pore size. The maximum adsorption capacity was found to be 37.37 mg/g, with adsorption process fitting well with Langmuir isotherm and pseudo-second order kinetic model. The composite remained stable and selective for Sr2+ adsorption across a wide pH range of 3-11.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Mingdong Li, Jiawei Wang, Bibo Gou, Dejin Fu, Haifeng Wang, Pingyuan Zhao
Summary: This paper investigates the adsorption performance of different crystal forms of MnO2 on heavy metal ions in high-concentration metal salt solution. It is found that the equi-acidity point pH of different crystalline MnO2 varies, which is mainly influenced by the complexation of surface hydroxyl. By controlling the pH, more hydroxyl groups can participate in the adsorption reaction, thereby increasing the adsorption rate of MnO2 on heavy metal ions.
Article
Multidisciplinary Sciences
Gaosheng Zhang, Jinglin Luo, Hanlin Cao, Shengping Hu, Huosheng Li, Zhijing Wu, Yuan Xie, Xiangping Li
Summary: In this study, amorphous hydrous titanium dioxide was synthesized and found to have high adsorption capacity for thallium(I). It showed high selectivity towards thallium(I) in the presence of multiple cations and demonstrated effectiveness in removing thallium(I) from real river water and mining wastewater. The spent titanium dioxide can also be regenerated and reused.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Peiran Li, Yingting Gong, Wenyi Lu, Nobuo Sakagami, Zhaowen Mo, Masakazu Komatsuzaki
Summary: This study investigates the transfer of Cs-137 in soil and its impact on the concentration of Cs-137 in soybeans after the Fukushima nuclear accident. The results demonstrate that tillage practices and soil properties play a significant role in the translocation of Cs-137 between soil and crops.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Xiaolin Ye, Daliang Han, Guangyi Jiang, Changjun Cui, Yong Guo, Yaogang Wang, Zhicheng Zhang, Zhe Weng, Quan-Hong Yang
Summary: Aqueous rechargeable batteries based on MnO2 are attracting attention due to their high theoretical capacity and redox potential, as well as their low cost and safety. However, the chemistry of MnO2 deposition/dissolution is not well understood, hampering its practical use in batteries. This study used an electrochemical quartz crystal microbalance technique to investigate the deposition/dissolution process and discovered that it involves pH-dependent Mn(iii)-intermediates. The presence of dissolved Mn3+ decreases the battery's performance, but the problem can be addressed by introducing redox mediators into the electrolyte.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Kai Bian, Cuiping Wang, Yulong Shen
Summary: This study presents measurements of Cs-137 in the Qaidam Basin in 2019 and estimates soil wind erosion based on Cs-137 inventories. The results show that Cs-137 inventories in the surface soil range from LDD to 1,072 Bq m(-2), with the highest values in farmland and the lowest in Gobi. Wetlands have higher Cs-137 inventories compared to their neighboring sites.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Joyce W. L. Ang, Arthur Bongrand, Samuel Duval, Jeerome Donnard, Joni Parkkonen, Satoshi Utsunomiya, Risto Koivula, Marja Siitari-Kauppi, Gareth T. W. Law
Summary: Cesium-134 and -137 are long-lived, radio-toxic contaminants released during nuclear accidents. We propose an improved method, real-time autoradiography, for detecting Cs-bearing microparticles. This technique provides spatially resolved measurement of radioactivity and could be a valuable tool for forensic analysis after nuclear accidents.
Article
Environmental Sciences
Mengmeng Cheng, Chenxue Yao, Yan Su, Jinglei Liu, Lijian Xu, Shifeng Hou
Summary: The study developed a manganese dioxide (MnO2) membrane-type adsorbent using vacuum filtration method with graphene oxide (GO) and amino-beta-cyclodextrin (amino-beta-CD). The membrane exhibited specific selectivity and high adsorption capacity for lithium ions, successfully extracting lithium ions from seawater.
Article
Chemistry, Analytical
Yuliia Bondar, Yuriy Olkhovyk, Svitlana Kuzenko
Summary: The study synthesized a composite adsorbent with high efficiency and selectivity for rapid cesium ion adsorption under different experimental conditions, demonstrating a wide pH range and selectivity for Cs ion removal from multicomponent solutions, as well as good chemical stability in acidic and alkaline solutions. The adsorption of cesium ions followed the Langmuir isotherm model with a maximum adsorption capacity of 59.2 mg g(-1).
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Physical
Xiao Tan, Suitao Qi, Rui Hua, Chunhai Yi, Bolun Yang
Summary: The study investigated the adsorption and dissociation pathways of NO on different crystal surfaces of beta-MnO2, with results indicating that NO prefers to adsorb on the beta-MnO2(110) surface, showing stronger interaction and more charge transfer compared to the (101) surface. The lower energy barrier for NO dissociation on beta-MnO2(110) is attributed to bridge adsorption of NO and increased electron transfer, facilitating N-O bond breaking.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
R. Galea, K. Moore
Summary: In this study, the solution of 225Ac was standardized using the TDCR method. The counting efficiencies were calculated to be approximately 500% for the NRC TDCR system. The relative uncertainty for the activity concentration was determined to be 0.25%. The measured half-life of 225Ac was found to be consistent with previous measurements.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
N. C. Ramirez, S. M. Collins
Summary: In this paper, the authors determined the half-life of 68Ga using ionisation chambers measurements and HPGe gamma-ray spectrometry. They reviewed the current literature and identified possible causes of inconsistency within the dataset. The findings suggest that addressing these issues could lead to a significant improvement in future evaluations of the half-life.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
C. P. Mano, C. Chapelle, Der Mesrobian Kabakian, H. Paradis, O. Delaune, L. Patryl
Summary: CEA/DAM is developing new beta-gamma measurement systems to enhance the reliability of the Comprehensive Nuclear Test Ban Treaty's verification regime. A new spectral unmixing algorithm for full-spectrum analysis was tested to improve analysis methods for nuclear activities with low statistics.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Junyoung Lee, Geunsub Kim, Hyegang Chang, Sangmin Lee, Sung-Joon Ye
Summary: The study applied the convolution/superposition method to calculate the dose distribution of boron neutron capture therapy and compared it with the Monte Carlo method. The results showed that the C/S method has a fast calculation speed and reasonable accuracy.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Victor H. Elvira, Marie-Christine Lepy, Yves Menesguen, Stephanie Melhem
Summary: In this study, a cryogenic electrical-substitution radiometer was utilized for the primary calibration of monochromatic photon beams at a synchrotron facility, in order to determine the intrinsic efficiency and dead layer thickness of an HPGe detector. This calibration method allowed for the calculation of efficiency up to 55 keV, where the active thickness of the detector is not a determining factor. Geometrical efficiency was also determined through measurements of a radioactive source at various distances.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Ali Pashazadeh, Hamid Reza Baghani, Mostafa Robatjazi, Prajit Kadavil
Summary: This study investigated the effect of patch source geometric parameters on the depth dose distribution in skin tissue through Monte Carlo simulation. The results showed that increasing the source-to-skin distance, patch thickness, and patch diameter will reduce the depth dose distribution, with the source-to-skin distance having the most significant impact on dose gradient.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Yueli Song, Fengqun Zhou, Yajuan Hao, Xiaopeng Zhang, Pengfei Ji, Yong Li
Summary: In this study, the cross section values of the 109Ag(n,2n)108mAg reaction at different neutron energies were measured using the activation technique and off-line gamma-ray spectrometry. The results were compared with experimental data, evaluated data from libraries, and theoretical values to validate their accuracy.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Zhongkai Fan, Tao Hu, Xiangming Cai, Ruomei Xie, Haoxuan Li, Fengdi Qin, Shoukang Qiu, Yanliang Tan, Jian Shan
Summary: The high-precision measurement of Rn-220 is crucial for assessing and preventing thoron radiological hazards. By adding a ZnS(Ag)-coated clapboard, the issue of reduced Rn-220 concentrations due to decreased air pressure can be addressed, leading to improved detection efficiency. Experimental and simulation results provide valuable references for establishing the Rn-220 calibration factor.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
R. Han, Z. Chen, Y. Nie, B. Liu, G. Tian, X. Zhang, F. Shi, H. Sun, Z. Zhang, Y. Ding, X. Ruan, J. Ren, S. Zhang
Summary: The leakage neutron spectra of Lead samples were measured using a TOF technique, and MCNP simulations with different nuclear data libraries showed that JENDL-5.0 and JEFF-3.3 libraries have better agreement with experimental data. Differences in spectra mainly stem from variations in neutron reaction channels across the libraries, with ENDF/B-VIII.0 and CENDL-3.2 libraries being overestimated in certain energy ranges.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Nissren Tamam, Maryam Al Huwayz, Z. A. Alrowaili, Norah Alwadai, Khadijah Mohammedsaleh Katubi, Mohammed S. Alqahtani, I. O. Olarinoye, M. S. Al-Buriahi
Summary: This study investigates the radiation shielding properties and radiation protection applications of borotellurite glasses. The results show that the addition of TeO2 can enhance the glass's ability to absorb photons and fast neutrons, and effectively suppress photon buildup. These glasses also exhibit exceptional gamma radiation and fast neutron moderating abilities, making them suitable for designing lead-free, transparent, and efficient radiation protection structures.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
S. Chasapoglou, M. Kokkoris, R. Vlastou, M. Diakaki, V. Michalopoulou, A. Kalamara, G. Gkatis, A. Stamatopoulos, M. Axiotis, S. Harissopulos, A. Lagoyannis, M. I. Savva, T. Vasilopoulou, C. Lederer-Woods, N. Patronis, K. Kaperoni
Summary: This study investigated the accuracy and limitations of theoretical corrections in neutron-induced reactions on isotopically enriched Ge targets. Experimental cross-section measurements were conducted on several reactions using Ge-nat and isotopically enriched Ge targets. The results showed that the methodology using isotopically enriched targets provided accurate results without the need for theoretical corrections.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
P. G. Konstantinidis, G. S. Polymeris, E. Tsoutsoumanos, G. Kitis
Summary: This study investigates an altered version of an existing protocol to study the mechanisms and phenomena of stimulated luminescence. The protocol allows for the examination of recombination mechanisms and trapping parameters of the traps, as well as the observation of potential transitions between two different states.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Quanzhi Yu
Summary: This study obtained the broad neutron spectrum of the Atmospheric Neutron Irradiation Spectrometer (ANIS) through Monte Carlo simulation and provided an analytic expression. By calculating the Single Error Rate (SER) and ratio, the reliability of the ANIS neutron spectrum was evaluated.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
D. Glavic Cindro, M. Korun, T. Petrovic, B. Vodenik, B. Zorko
Summary: In gamma-ray spectrometric measurements, the decision threshold is determined by the observed value of the measurand. However, this dependence restricts its application to measurements with non-expressive indications. To address this issue, a recalculation of the decision thresholds based on the peak widths corresponding to expressive indications is proposed.
APPLIED RADIATION AND ISOTOPES
(2024)