Radiochimica Acta最新文献_第2页

Study on the adsorption performance of zeolite imidazole frameworks materials for Co(II) and Mn(II) in solution 沸石咪唑框架材料对溶液中 Co(II) 和 Mn(II) 的吸附性能研究

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-07-24 DOI: 10.1515/ract-2024-0274

Ping Bao, Yipeng Zhou, Xiaowei Wang, Jinfeng Men, Chengqiang Liang, Hao Ding

{"title":"Study on the adsorption performance of zeolite imidazole frameworks materials for Co(II) and Mn(II) in solution","authors":"Ping Bao, Yipeng Zhou, Xiaowei Wang, Jinfeng Men, Chengqiang Liang, Hao Ding","doi":"10.1515/ract-2024-0274","DOIUrl":"https://doi.org/10.1515/ract-2024-0274","url":null,"abstract":"The radionuclides 60Co and 54Mn are the main activation products produced in the operation of nuclear power facilities. Wastewater with these radionuclides must be treated to meet standards before being discharged. A variety of zeolite imidazole frameworks (ZIFs) materials were synthesized at room temperature, and the adsorption effect of ZIF-67 was found to be the best through adsorption experiments on Co(II) and Mn(II). The thermal stability test and structural characterization of ZIF-67 were carried out. At the same time, the influence of the initial pH value, adsorption time, and initial concentration of the solution on the adsorption of Co(II) and Mn(II) by ZIF-67 was investigated. The results show that: ZIF-67 has a microporous structure with a BET surface area of 1,035.72 m2/g. In addition, ZIF-67 has good thermal stability, under the condition of pH = 6, a temperature of 303 K and the initial concentration of 500 mg/L. The saturated adsorption capacity for Co(II) and Mn(II) reached 230.25 mg/g and 338.75 mg/g, respectively. ZIF-67 exhibits good selective adsorption performance for Co(II) and Mn (II) in high concentration interfering ion solutions and multi-ion solutions. The adsorption process of ZIF-67 was analyzed by kinetics, thermodynamics, isotherms, and adsorption diffusion models. The analysis of thermodynamic parameters shows that the adsorption process of ZIF-67 to Co(II) and Mn(II) is spontaneous and endothermic. The pseudo-second-order kinetic model, Langmuir isotherm model, and Boyd model are more in line with the adsorption process of Co(II) and Mn(II) by ZIF-67. It shows that the active sites on the surface of ZIF-67 are evenly distributed, and the adsorption process is single-molecule chemical layer adsorption. In addition, the liquid film diffusion dominates the adsorption rate during the adsorption process of Co(II) and Mn(II) by ZIF-67.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Measurement of gross alpha radioactivity levels and estimation of annual effective dose in hazelnut kernels 榛子核仁中总α放射性水平的测量和年有效剂量的估算

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-07-22 DOI: 10.1515/ract-2023-0224

Gözde Tektaş, Buket Canbaz Öztürk

引用次数: 0

Independent isomeric yield ratios of fission products in the epi-cadmium neutron-induced fission of 245Cm 245Cm 外镉中子诱发裂变中裂变产物的独立异构体产率

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-07-18 DOI: 10.1515/ract-2024-0287

Haladhara Naik, Ram Janam Singh, Srikant Pandurang Dange, Wooyoung Jang

引用次数: 0

Hydrodynamic study of a flow-rig column by means of a radiotracer technique modelling with DTS-Pro 4 利用 DTS-Pro 4 进行放射性示踪技术建模，对流动钻杆柱进行流体力学研究

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-07-11 DOI: 10.1515/ract-2023-0227

Louisa Bounemia, Chaouki Benazzouz, Mouhamed Belamri

引用次数: 0

Physicochemical model of uranium hexafluoride (UF6) radiolysis under action of alpha particles 六氟化铀（UF6）在α粒子作用下发生辐射分解的物理化学模型

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-07-09 DOI: 10.1515/ract-2023-0263

Artem A. Danshin, Alexey A. Kovalishin

引用次数: 0

Fabrication and characterization of graphene oxide and reduced graphene oxide decorated diatomite composite materials and their adsorption performance for uranium ions 氧化石墨烯和还原氧化石墨烯装饰硅藻土复合材料的制备与表征及其对铀离子的吸附性能

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-07-07 DOI: 10.1515/ract-2024-0292

Sabriye Yusan, Burak Mumcu, Eduardo A. López-Maldonado, Rachid EL Kaim Billah, Lahoucine Bahsis

{"title":"Fabrication and characterization of graphene oxide and reduced graphene oxide decorated diatomite composite materials and their adsorption performance for uranium ions","authors":"Sabriye Yusan, Burak Mumcu, Eduardo A. López-Maldonado, Rachid EL Kaim Billah, Lahoucine Bahsis","doi":"10.1515/ract-2024-0292","DOIUrl":"https://doi.org/10.1515/ract-2024-0292","url":null,"abstract":"In this study, the composite materials based on the incorporation of diatomite of graphene oxide (GO)/reduced graphene oxide (rGO/diatomite) were developed and characterized by different techniques (SEM, XRD, FTIR and BET). Developed composites were used for the first time in the removal of uranium ions from aqueous solutions. In adsorption studies, parameters affecting the adsorption efficiency such as solution pH, temperature, contact time and initial U(VI) concentration were investigated using full factorial experimental design (FFED). ANOVA (analysis of variance) analysis within the 95 % confidence interval of the model applied to control the compatibility of the model and the experimental findings was examined. Langmuir, Freundlich and Temkin isotherms were used to determine the adsorption model and related parameters were calculated. In addition, adsorption thermodynamic parameters such as enthalpy, Gibbs free energy change and entropy were calculated. The uranium removal behaviour on GO/diatomite and rGO/diatomite was better characterized by the pseudo-second order and Langmuir models, indicating that uranium ions were chemically adsorbed onto composite materials. Additionally, it was observed that higher temperatures promoted the uranium removal on GO/diatomite and rGO/diatomite, suggesting that the removal process was a spontaneous endothermic and exothermic reaction, respectively. In addition, the adsorption of U(VI) with GO/diatomite and rGO/diatomite was investigated using density functional theory (DFT) study. Configuration and adsorption energy were determined. The GO/diatomite composite materials can be a promising candidate as an adsorbent for the removal of uranium from aqueous solutions.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of MnO2 modified winter melon-derived biochar for enhanced adsorption of U(VI) from aqueous solution 制备 MnO2 改性冬瓜生物炭以增强水溶液中 U(VI) 的吸附能力

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-07-07 DOI: 10.1515/ract-2024-0301

Qing Zhou, Yanjun Du, Zihao Feng, Qi Ren, Yang Wang, Xiaoyong Chen, Yang Li, Yun Wang

{"title":"Preparation of MnO2 modified winter melon-derived biochar for enhanced adsorption of U(VI) from aqueous solution","authors":"Qing Zhou, Yanjun Du, Zihao Feng, Qi Ren, Yang Wang, Xiaoyong Chen, Yang Li, Yun Wang","doi":"10.1515/ract-2024-0301","DOIUrl":"https://doi.org/10.1515/ract-2024-0301","url":null,"abstract":"This work synthesized MnO2 modified winter melon-derived biochar (MnO2@WBC) using potassium permanganate oxidation/hydrothermal method for uranium(VI) removal. The factors influencing uranium(VI) adsorption by MnO2@WBC, including pH, adsorbent dosage, time, temperature, and initial U(VI) concentration were explored. The material’s performance was characterized, and the underlying mechanism of U(VI) removal was analyzed using various techniques. The characterization results indicated that the MnO2@WBC exhibited excellent dispersibility, suggesting that MnO2 effectively prevented WBC aggregation and enhanced the reactive surface area, and providing more active sites that can effectively promote the complexation and adsorption of U(VI). The process suggested a dominant role for chemical adsorption. The Freundlich isotherm model demonstrated a high degree of alignment with the observed adsorption behavior, indicating a predominantly multilayer adsorption process. Thermodynamic studies indicated that adsorption was a spontaneous endothermic process. The XPS analysis demonstrated that the adsorption process was primarily due to the formation of stable complexes with C–O, Mn–O–H and C=O. The results demonstrated that MnO2@WBC effectively removed U(VI), achieving a maximum adsorption capacity of 240.86 mg g−1 at a pH of 5.0. These findings provided a theoretical basis for the treatment of wastewater contaminated with U(VI).","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis, in silico and biodistribution studies of a novel 47Sc-radiolabeled α-amino acid ester derivative attached to pyrazine and tetrazole rings for tumor targeted radiotherapy 用于肿瘤靶向放射治疗的新型 47Sc 放射标记α-氨基酸酯衍生物的合成、硅学和生物分布研究

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-07-04 DOI: 10.1515/ract-2023-0175

Mohamed A. Gizawy, Hesham A. Shamsel-Din, Mohsen M. T. El-Tahawy, Ayman A. Ibrahim

{"title":"Synthesis, in silico and biodistribution studies of a novel 47Sc-radiolabeled α-amino acid ester derivative attached to pyrazine and tetrazole rings for tumor targeted radiotherapy","authors":"Mohamed A. Gizawy, Hesham A. Shamsel-Din, Mohsen M. T. El-Tahawy, Ayman A. Ibrahim","doi":"10.1515/ract-2023-0175","DOIUrl":"https://doi.org/10.1515/ract-2023-0175","url":null,"abstract":"Recently, tumor-targeted radionuclide therapy has gained much recognition for the treatment of metastasized cancer. There is a growing interest in using the theranostic radionuclide 47Sc, owing to its excellent chemical and nuclear properties. However, the available chelating agents require a relatively high temperature for their radiolabeling, which could denature biomolecules. The aim of the present study is to synthesize a dipeptide agent that forms a thermodynamically more stable complex with 47Sc at room temperature. A novel α-amino acid ester derivative attached to pyrazine and tetrazole heterocyclic rings has been prepared by the azide coupling method. Different spectroscopic methods (FT-IR, 1H NMR, and mass spectra) were used for characterization of the target compound. The newly synthesized dipeptide was radiolabeled with 47Sc, and a high radiochemical yield of 98.5 ± 1.5 % and in vitro serum stability up to 72 h were attained at room temperature within 20 min. The quantum chemical calculations at B3PW91/6-31G(d) level were employed to establish the molecular structure of the dipeptide and its complexation with 47Sc. The selectivity of 47Sc-dipeptide toward localization in tumor cells was performed by molecular docking on different receptors in addition to in vivo biodistribution on solid tumor-bearing mice. A high T/NT ratio of 8.16 was obtained after 4 h p.i, suggesting that this complex could be used as a potential cancer theranostic agent.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Separation studies of 60Co (II) and 134Cs (I) radionuclides from aqueous solution using starch-grafted citric acid-acrylamide/magnesia hydrogel 利用淀粉接枝柠檬酸-丙烯酰胺/镁水凝胶从水溶液中分离 60Co (II) 和 134Cs (I) 放射性核素的研究

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-06-24 DOI: 10.1515/ract-2024-0295

Maha Ali Youssef, Gehan Abdel Rahman Sadek Dakroury, Hisham Soliman Hassan

{"title":"Separation studies of 60Co (II) and 134Cs (I) radionuclides from aqueous solution using starch-grafted citric acid-acrylamide/magnesia hydrogel","authors":"Maha Ali Youssef, Gehan Abdel Rahman Sadek Dakroury, Hisham Soliman Hassan","doi":"10.1515/ract-2024-0295","DOIUrl":"https://doi.org/10.1515/ract-2024-0295","url":null,"abstract":"In this study, three starch hydrogels composite prepared using different ratios of starch, citric acid, acrylamide, and MgO nanoparticles (referred to as St1-g-(CA-AM), St2-g-(CA-AM), and St3-g-(CA-AM) MgO). These materials were assessed using FT-IR, SEM, and EDX. The adsorption of 134Cs(I) and 60Co (II) onto these materials studied using radiometric analysis. The investigation focused on how temperature, contact duration, initial metal ion concentration, and pH of the solution affected the sorption efficiency. It is found that a pH value of 7 optimized the adsorption reaction, reaching equilibrium after 40 minutes. The kinetics of the adsorption followed a pseudo-second order model. The Langmuir model adequately explained the sorption mechanism, supported by the analysis of isotherm models. The monolayer adsorption capacities for 60Co (II) and 134Cs (I) were 113.38 and 100.2 mg g−1, respectively. The thermodynamic study indicated that the sorption process is both endothermic and spontaneous.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification and time evolution of thionyl chloride (SOCl2) radiolysis products 亚硫酰氯（SOCl2）辐射分解产物的鉴定和时间演化

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-06-21 DOI: 10.1515/ract-2024-0288

Jacy K. Conrad, Michael E. Woods, Gregory P. Horne

{"title":"Identification and time evolution of thionyl chloride (SOCl2) radiolysis products","authors":"Jacy K. Conrad, Michael E. Woods, Gregory P. Horne","doi":"10.1515/ract-2024-0288","DOIUrl":"https://doi.org/10.1515/ract-2024-0288","url":null,"abstract":"Innovative solutions are needed to reduce the amount of high-level waste generated by used nuclear fuel recycling strategies to support the widespread adoption of sustainable nuclear fission energy technologies. To this end, a new sulfur chloride-based process has been developed to recycle zirconium alloy-based materials, which make up a significant fraction of high-level radioactive waste. To support the continued development of this process, we present new data on the potential reaction pathways over time of the products arising from the gamma and electron beam radiolysis of neat thionyl chloride (SOCl2). Interrogation of the gamma irradiated liquid by Raman spectroscopy provided more conclusive identification of the SOCl2 degradation products, specifically sulfur dichloride (SCl2), molecular chlorine (Cl2), sulfur dioxide (SO2), and sulfuryl chloride (SO2Cl2). In comparison, the high dose rate (∼107 Gy s−1) electron beam irradiations formed significantly more degradation products. For both cobalt-60 gamma and electron beam irradiations, the observed degradation products were found to evolve as a function of time post-irradiation via the same reaction pathways, with indication of a solvent regeneration mechanism. These findings are fortuitous for process development, as such a mechanism would be beneficial for process longevity and cost effectiveness.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0