Radiochimica Acta最新文献_第3页

Sorption behavior of low specific activity 99Mo on Ti- and Zr-xerogels as an alternative to fission-based 99Mo/99mTc generators 低比活度 99Mo 在 Ti- 和 Zr-xerogels 上的吸附行为，作为裂变式 99Mo/99mTc 发生器的替代物

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-05-30 DOI: 10.1515/ract-2023-0223

Nancy Moreno-Gil, Verónica E. Badillo-Almaraz, Guadalupe C. Velazquez-Peña, Miguel A. Camacho-López, Keila Issac-Olivé

{"title":"Sorption behavior of low specific activity 99Mo on Ti- and Zr-xerogels as an alternative to fission-based 99Mo/99mTc generators","authors":"Nancy Moreno-Gil, Verónica E. Badillo-Almaraz, Guadalupe C. Velazquez-Peña, Miguel A. Camacho-López, Keila Issac-Olivé","doi":"10.1515/ract-2023-0223","DOIUrl":"https://doi.org/10.1515/ract-2023-0223","url":null,"abstract":"In order to contribute to the sufficient supply of clinical 99mTc(VII), the sorption behavior of neutron-produced 99Mo(VI) was investigated on synthetized single and binary Ti and Zr xerogels treated at different temperatures, under normal operating conditions. Materials were prepared by the sol–gel method and characterized by several techniques. Sorption batch systems were performed using 99Mo radiotracer to determine the metallic affinity as a function of pH, and a methodology was developed in order to obtain the maximum capacities by surface saturation, where the Ti-388, TiZr-388 (3:1) and Zr-388 samples showed the most noteworthy sorption behaviors (33.1 ± 0.34 mg/g at pH ∼ 6.0, 31.7 ± 0.27 mg/g at pH ∼ 6.5, and 23.5 ± 0.61 mg/g at pH ∼ 6.8, respectively). The molybdenum-99 sorption behavior was also studied by fitting to the Freundlich and Langmuir models, and all xerogels could be described as heterogeneous materials with favorable 99Mo sorption properties. Finally, preliminary studies of clinical-scale 99Mo/99mTc generators were performed, the results revealed the next maximum 99mTc elution yield order Ti-388 (89.6 %) > TiZr-388 (3:1) (86.7 %) > Zr-388 (77.7 %).","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"42 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141189247","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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Investigation of radioactivity concentrations and soil-to-plant transfer factors in soil samples taken from different distance zones to the Metsamor nuclear power plant 调查从梅萨莫尔核电站不同距离区域采集的土壤样本中的放射性浓度和土壤-植物转移因子

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-05-29 DOI: 10.1515/ract-2024-0291

Serdar Dizman, Selim Sari, Cafer Mert Yesilkanat

引用次数: 0

The performance of iron-silicate-based biochar as a sorbent material towards 133Ba retention from radioactive liquid waste 硅酸铁基生物炭作为吸附材料从放射性液体废物中截留 133Ba 的性能

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-05-27 DOI: 10.1515/ract-2024-0273

Sara S. Mahrous, Muhammad S. Mansy, Maha A. Youssef

{"title":"The performance of iron-silicate-based biochar as a sorbent material towards 133Ba retention from radioactive liquid waste","authors":"Sara S. Mahrous, Muhammad S. Mansy, Maha A. Youssef","doi":"10.1515/ract-2024-0273","DOIUrl":"https://doi.org/10.1515/ract-2024-0273","url":null,"abstract":"The application of Phalaris seed peel (PSP) for the production of biochar involves the pyrolysis process in an N2 environment, resulting in the creation of a cost-effective sorbent. Two distinct modifications were conducted on the existing biochar (BC), employing just silicate (BC/SiO2) and in combination with iron-silicate (BC/SiO2/Fe). Several analytical methods were used to look at the modified biochar’s physical and chemical properties. These included scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis-differential thermal analysis (TGA-DTA), and surface area analysis. Based on the initial investigations, it has been revealed that the use of silica and iron as the second modification is a more suitable approach for effectively retaining 133Ba from liquid radioactive waste streams. The investigation of sorption kinetics and isotherms was conducted to enhance our understanding of the process. The Langmuir isotherm model demonstrates the most optimal correlation for sorption, yielding a maximum sorption capacity (Q max) of 31 mg/g. Furthermore, an evaluation was performed on the BC/SiO2/Fe sorbent material by subjecting it to a mixture of simulated radioactive liquid waste, which included 133Ba, 60Co, and 137Cs.The experimental results indicate that BC/SiO2/Fe exhibits a comparatively higher sorption capacity for 133Ba when compared to 60Co and 137Cs as competing ions.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"31 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141165985","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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Phytoremediation of radium contaminated soils: recent advances and prospects 镭污染土壤的植物修复：最新进展与前景

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-05-13 DOI: 10.1515/ract-2023-0248

Jianlong Wang, Can Chen

{"title":"Phytoremediation of radium contaminated soils: recent advances and prospects","authors":"Jianlong Wang, Can Chen","doi":"10.1515/ract-2023-0248","DOIUrl":"https://doi.org/10.1515/ract-2023-0248","url":null,"abstract":"Radioactive radium (Ra) mainly comes from the mining and milling of uranium and other metal or non-metal mines, phosphate production and fertilizer use, production of oil and gas, coal combustion, wastewater treatment, and various wastes from the above activities, which is ubiquitous in the environment. Phytoremediation is a green and cheap remediation technology for metal/radionuclide-contaminated sites. Radium is often of particular interest and there are many literatures on parameters of Ra concentration in plants and transfer factors from soil to plant from a radiological impact assessment point of view. However, review articles on phytoremediation of Ra-polluted soil are relatively few. This review focused on radium-polluted soil phytoremediation, involving two main strategies of phytoextraction and phytostabilization, which covered the potential (hyper)accumulators for Ra, characteristics of Ra uptake from soil by plants, influencing factors, and phytostabilization application. In future research works, more attention should be paid to the deep insights and mechanism researches of Ra uptake/immobilization by plants. This review will deepen the understanding of the relationship of radium-soil-plants, and to enhance the potential application of phytoremediation as an alternative treatment technology for remediation of Ra-polluted soil site.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"44 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938131","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

The adsorption of U(VI) on chlorite: batch, modeling and XPS study U(VI)在绿泥石上的吸附：批处理、建模和 XPS 研究

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-05-09 DOI: 10.1515/ract-2024-0278

Qiang Jin, Yuxiong Wang, Xin Zhao, Ye Fan, Xinya Diao, Zongyuan Chen, Zhijun Guo

{"title":"The adsorption of U(VI) on chlorite: batch, modeling and XPS study","authors":"Qiang Jin, Yuxiong Wang, Xin Zhao, Ye Fan, Xinya Diao, Zongyuan Chen, Zhijun Guo","doi":"10.1515/ract-2024-0278","DOIUrl":"https://doi.org/10.1515/ract-2024-0278","url":null,"abstract":"A mechanistic modelling of the adsorption processes onto individual minerals presenting in the near- and far-fields can greatly enhance the credibility of long-term safety assessments of granite-based geological repositories. In this study, the titration and U(VI) adsorption characteristics of chlorite, one of the major minerals of rock fractures, have been studied. Potentiometric titration curves at two ionic strengths (0.1 and 0.4 mol/L NaCl) are successfully interpreted by considering protonation/deprotonation reactions on generic edge sites (≡SOH) in the framework of a non-electrostatic surface complexation model (SCM). The adsorption of U(VI) on chlorite was reached after 24 h, the adsorption kinetics can be described by a pseudo-second-order model. A non-electrostatic SCM with three surface complexes (≡SOUO2 +, ≡SO(UO2)3(OH)5 and ≡SO(UO2)3(OH)7 2−) was set up based on pH edges of U(VI) at adsorption equilibrium in the absence of CO2. Additional, experimental data measured as a function of U(VI) concentration, solid-to-liquid ratio and carbonate concentration were well reproduced by the proposed model. Finally, parallel experiments were conducted using X-ray photoelectron spectroscopy (XPS) to analyze the variation of U(VI) surface species speciation at different pH values. The good agreement between SCM prediction and XPS analysis demonstrates the reliability of the model in predicting and quantifying the radionuclides retention by chlorite.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140937955","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

Study of gamma, neutron, and proton interaction parameters of some immunotherapy drugs using EpiXs, NGCal, and PSTAR software 使用 EpiXs、NGCal 和 PSTAR 软件研究某些免疫疗法药物的伽马、中子和质子相互作用参数

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-05-08 DOI: 10.1515/ract-2023-0255

Gangadharayya Hiremath, Vishwanath Singh, Narasimha Ayachit, Nagappa Badiger

{"title":"Study of gamma, neutron, and proton interaction parameters of some immunotherapy drugs using EpiXs, NGCal, and PSTAR software","authors":"Gangadharayya Hiremath, Vishwanath Singh, Narasimha Ayachit, Nagappa Badiger","doi":"10.1515/ract-2023-0255","DOIUrl":"https://doi.org/10.1515/ract-2023-0255","url":null,"abstract":"In proton therapy, the protons are used to destroy the cancer cells efficiently at the Bragg peak without much damage to normal cells. The protons can also produce neutrons, protons, and high-energy gamma rays through nuclear reactions with cancerous and healthy tissues as well as with beamline components. The effective observed dose in the therapy is enhanced due to the interaction of nuclear particles with cancerous tissues. Such nuclear particles can have several effects on drugs used in immunotherapy, such as immunotherapy in combination with proton therapy, which has been used to treat cancer. In the present investigations, the gamma, neutron, and protons interaction parameters of some immunotherapy drugs, such as dostarlimab, atezolizumab, ipilimumab, nivolumab, and pembrolizumab, are determined by using EpiXs, NGCal, and PSTAR software. It is found that the EBF and EABF for all selected immunotherapy drugs increase with increasing penetration depth, peaking at 100 keV. The peaking is more symmetric at a higher penetration depth of 40 mfp than at a lower one of 1 mfp. At lower energies of gamma photons, the EBF values increase exponentially, and at higher energies, they increase linearly with increasing penetration depth for all selected drugs. Mass attenuation factors are slightly higher for thermal neutrons than for fast neutrons for selected immunotherapeutic drugs, indicating that thermal neutrons more actively participate in these drugs than fast neutrons. The mass attenuation factor for both fast and thermal neutrons increases with increasing weight percentages of hydrogen and is found to be higher for thermal neutrons. This is the first study in the literature to investigate the radiation interaction parameters for immunotherapy drugs, and it is helpful in radiation therapy and dosimetry.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"155 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929251","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

Challenges in the solution phase synthesis of PSMA-11 and PSMA-617: organic ligands for radiopharmaceutical preparations in prostate cancer medication 溶液相合成 PSMA-11 和 PSMA-617 的挑战：用于前列腺癌放射性药物制剂的有机配体

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-04-30 DOI: 10.1515/ract-2024-0280

K. S. Ajish Kumar, Anupam Mathur

{"title":"Challenges in the solution phase synthesis of PSMA-11 and PSMA-617: organic ligands for radiopharmaceutical preparations in prostate cancer medication","authors":"K. S. Ajish Kumar, Anupam Mathur","doi":"10.1515/ract-2024-0280","DOIUrl":"https://doi.org/10.1515/ract-2024-0280","url":null,"abstract":"Patient specific treatments for different cancers are currently being actively addressed through nuclear medicine. More recently, the identification of biomarker namely; prostate-specific membrane antigen (PSMA) expressed on the prostate cancer cell surface has been considered as a turning point in prostate cancer management using radiopharmaceuticals. In this treatment method, apart from radionuclide, organic ligands that target PSMA constitute an essential component. PSMA-11 and PSMA-617 are two important ligands that form the radiopharmaceuticals, [68Ga]Ga-PSMA-11, [177Lu]Lu-PSMA-617, which are currently powering the prostate cancer management, especially metastatic castration resistant prostate cancer (mCRPC) in most part of the world. Identification of efficient synthetic routes towards these highly expensive ligands is an important prerequisite to make this treatment modality more popular. In this account, the synthetic challenges that we circumvent during the solution phase synthesis of PSMA-11 and PSMA-617, through different chemical synthetic routes are demonstrated. Post-synthesis, both the ligands, PSMA-11 and PSMA-617 were successfully radiolabelled using 68Ga, and 177Lu, respectively, to generate corresponding labelled products [68Ga]Ga-PSMA-11, and [177Lu]Lu-PSMA-617, in good radiochemical purity.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"31 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140833470","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

Insight on the properties of multi-walled carbon nanotubes reinforced nitrile rubber composites cured by ionizing radiation or peroxide: a comparative study 电离辐射或过氧化物固化的多壁碳纳米管增强丁腈橡胶复合材料性能透视：一项比较研究

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-04-17 DOI: 10.1515/ract-2023-0244

Khaled F. El-Nemr, Hamdi Radi, Aman I. Khalaf, Eman M. Hamdy

引用次数: 0

Green synthesis of CdS/flaxseed mucilage nanocomposite films using gamma irradiation for packaging applications 利用伽马辐照绿色合成用于包装的 CdS/亚麻籽粘液纳米复合膜

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-04-16 DOI: 10.1515/ract-2023-0251

Rehab Sokary, Heba A. Raslan, Rasha Mohammad Fathy

{"title":"Green synthesis of CdS/flaxseed mucilage nanocomposite films using gamma irradiation for packaging applications","authors":"Rehab Sokary, Heba A. Raslan, Rasha Mohammad Fathy","doi":"10.1515/ract-2023-0251","DOIUrl":"https://doi.org/10.1515/ract-2023-0251","url":null,"abstract":"The most common ways to produce nanoparticles are through chemical and physical processes, which can be expensive and environmentally hazardous. Using plant extracts (green synthesis) as reducing and capping agents is a simple, cost-effective, and environmentally friendly method of lowering the usage of dangerous chemicals in the synthesis of metal nanoparticles. This study covers the environmentally friendly synthesis of cadmium sulphide nanoparticles (CdS NPs) using a blend of flaxseed extracts (FM), polyvinyl alcohol (PVA), and chitosan (Cs). The composites are then exposed to gamma irradiation at doses of 20 kGy and 40 kGy. UV–VIS absorption spectroscopy, SEM, HRTEM, EDX, and FTIR were used to analyse the produced nanocomposite films. UV–Vis absorption spectra showed considerable surface Plasmon resonance (SPR) bands at 396–440 nm, indicating that CdS NPs had been successfully synthesized. A progressive red shift in wavelength was noted, along with the broadening of the absorption band as the irradiation dose increased. Transmission electron microscopy pictures revealed that the generated CdS nanostructures were dispersed as spherical nanoparticles with remarkable structural homogeneity. Tensile strength and elongation measurements of the films revealed that the inclusion of CdS NPs improved their mechanical properties. The addition of CdS NPs to the current blends limits biodegradation in soil. Thermal gravimetric analysis findings showed that CdS NPs included in FM/PVA films had improved thermal stability. The antimicrobial activities of the tested films were performed against Staphylococcus aureus, Escherichia coli, and Candida albicans. The results revealed that all of the films exhibited more antibacterial activity against S. aureus than the two others, with the highest activity observed in nanocomposites with a high concentration of CdS.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"48 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140564247","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

Uranium concentrations and its isotopes in baby food of Iraq 伊拉克婴儿食品中的铀浓度及其同位素

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2024-04-15 DOI: 10.1515/ract-2023-0267

Farqad Abbas Taher, Ali Abid Abojassim

{"title":"Uranium concentrations and its isotopes in baby food of Iraq","authors":"Farqad Abbas Taher, Ali Abid Abojassim","doi":"10.1515/ract-2023-0267","DOIUrl":"https://doi.org/10.1515/ract-2023-0267","url":null,"abstract":"This study determines uranium concentrations and isotopes (238U, 235U, and 234U) in baby food samples collected from Iraqi markets using solid-state nuclear track detector technical (CR-39). Also, some radiological hazard parameters such as annual committed effective dose (E U) and risk of an excess cancer fatality per million persons (RECFPMP) for the same study samples were calculated using theoretical equations. The samples in the present study were classified into three varieties: cereals and cereal products, vegetables and fruits, and biscuits. The results show that the average uranium concentration (mg/kg or ppm) values in cereals and cereal products, vegetables and fruits, and biscuits were 0.71 ± 0.01, 0.81 ± 0.04, and 0.72 ± 0.031, respectively. At the same time, the average values of 238U, 235U, and 234U in all samples of the present study were 9.08 ±0.17 Bq/kg, 0.42 ± 0.0081 Bq/kg, and 9.33 ± 0.18 Bq/kg, respectively. The total average of E U (mSv/y) due to all uranium isotopes (238U, 235U, and 234U) in cereals and cereal products, vegetables and fruits, and biscuits were 0.042 ± 0.0006, 0.039 ± 0.001, and 0.034 ± 0.001, respectively. Moreover, it was found that the average values of RECFPMP were 0.159 ± 0.002 in cereals and cereal products samples, 0.154 ± 0.007 in vegetables and fruits samples, and 0.130 ± 0.005 in biscuits samples. Uranium concentrations and the total annual committed effective dose in all baby food samples comply with the worldwide limits approved by UNSCEAR, which state safe limitations (1.7 mg/kg) and (0.32 mSv/y), respectively. So, one may conclude that there is no danger of uranium concentrations in the case of baby consumption.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"190 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140564423","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