Radiochimica Acta最新文献_第8页

Determination of natural and artificial radioactivity levels and radiation hazard indices for soil samples in Kırşehir Kırşehir土壤样品自然和人工放射性水平及辐射危害指数的测定

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2023-12-04 DOI: 10.1515/ract-2023-0215

Sümeyra Yamçıçıer, Doğan Yaşar

{"title":"Determination of natural and artificial radioactivity levels and radiation hazard indices for soil samples in Kırşehir","authors":"Sümeyra Yamçıçıer, Doğan Yaşar","doi":"10.1515/ract-2023-0215","DOIUrl":"https://doi.org/10.1515/ract-2023-0215","url":null,"abstract":"The aim of this study is to create a radiological map of Kırşehir province in Turkey by analyzing the radioactivity levels of soil samples and environmental radiation measurements. 226Ra, 232Th, 40K and 137Cs radionuclides were analysed in soil samples collected from 47 locations using gamma spectrometry with an HPGe detector. According to the results obtained, gamma radioactivity concentration ranges and mean values for 226Ra, 232Th, 40K and 137Cs were determined as 133 ± 15–1515 ± 128 Bq/kg (599.40 Bq/kg), 0.3 ± 0.09–21.1 ± 1.7 Bq/kg (4.61 Bq/kg), 8.7 ± 0.9–128.5 ± 8.5 Bq/kg (29.66 Bq/kg) and 11.6 ± 8.6–273.8 ± 19.9 Bq/kg (48.80 Bq/kg) respectively. Average radioactivity levels for 40K and 232Th are above the world average. The mean radium equivalent activity (Raeq), gamma dose rate (D), annual effective dose equivalent (AEDE), external hazard index (H ex ), and the excess lifetime cancer risk (ELCR) were calculated as 145.45 Bq/kg, 122.13 nGy/h, 0.15 mSv/h, 0.39 and 0.29 × 10−3 respectively.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"69 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138529146","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

Recycling waste polymer packaging materials as effective active carbon porous materials for uranium removal from commercial phosphoric acid 回收废旧高分子包装材料作为工业磷酸中除铀的有效活性炭多孔材料

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2023-11-30 DOI: 10.1515/ract-2023-0165

Saber Ibrahim, Ahmed M. Masoud, Mahmoud M. El-Maadawy, Hager Fahmy, Mohamed Taha

引用次数: 0

Inorganic composites based on carboxymethyl cellulose: preparation, characterization, sorption, and selectivity behavior for some radionuclides from radioactive solutions 基于羧甲基纤维素的无机复合材料:制备、表征、对放射性溶液中某些放射性核素的吸附和选择性行为

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2023-11-24 DOI: 10.1515/ract-2023-0214

Mohamed Ragab Abass, Maha Ali Youssef, Marwa Ahmed Eid

{"title":"Inorganic composites based on carboxymethyl cellulose: preparation, characterization, sorption, and selectivity behavior for some radionuclides from radioactive solutions","authors":"Mohamed Ragab Abass, Maha Ali Youssef, Marwa Ahmed Eid","doi":"10.1515/ract-2023-0214","DOIUrl":"https://doi.org/10.1515/ract-2023-0214","url":null,"abstract":"This work is interested in the sorption and separation of 131Ba, 109Cd, 152+154Eu, and 97Zr from radioactive solutions onto barium molybdenum titanate loaded on carboxy methyl cellulose (BaMoTi@CMC) composites. In this work, different samples of BaMoTi@CMC composites were fabricated by the co-precipitation method and characterized using different analytical tools such as X-ray diffraction (XRD), attenuated total reflectance (ATR), and scanning electron microscope (SEM). The batch sorption investigations on 131Ba, 109Cd, 152+154Eu, and 97Zr include the influence of time, pH, and metal ion concentrations. The data reveal that S-3 has higher sorption efficiency than S-2 under all conditions. Isotherm is studied by Langmuir and Freundlich models. Binary systems data confirm that Cd(ii), Ba(ii), and Zr(iv) can be separated from Cd–Eu, Ba–Eu, and Zr–Eu binary systems using S-2 and S-3 at different pHs. Finally, the data prove that Zr(iv) and Ba(ii) can be easily separated from tertiary systems (Zr–Ba–Cd) onto S-2 and S-3 at pH 2.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"24 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138529138","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

Production of Auger-electron-emitting 103mRh via a 103Pd/103mRh generator using an anion-exchange resin 利用阴离子交换树脂通过103Pd/103mRh发生器产生103mRh的俄歇电子

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2023-11-22 DOI: 10.1515/ract-2023-0238

Tomoyuki Ohya, Jun Ichinose, Kotaro Nagatsu, Yumi Sugo, Noriko Ishioka, Hiroshi Watabe, Masatoshi Itoh, Katsuyuki Minegishi, Ming-Rong Zhang

{"title":"Production of Auger-electron-emitting 103mRh via a 103Pd/103mRh generator using an anion-exchange resin","authors":"Tomoyuki Ohya, Jun Ichinose, Kotaro Nagatsu, Yumi Sugo, Noriko Ishioka, Hiroshi Watabe, Masatoshi Itoh, Katsuyuki Minegishi, Ming-Rong Zhang","doi":"10.1515/ract-2023-0238","DOIUrl":"https://doi.org/10.1515/ract-2023-0238","url":null,"abstract":"Rhodium-103m is one of the most attractive Auger electron emitters for internal radiotherapy. The half-life of 103mRh is relatively short (56.114 min). Therefore, it needs to be produced using a generator for clinical use. Most studies of 103Pd/103mRh generators using anion-exchange resins were carried out over 50 years ago. However, these resins are no longer commercially available. In the present study, we tested a 103Pd/103mRh generator using alternative anion-exchange resins (i.e., IRA904, IRA410, SA20A, and SA11AL). No-carrier-added 103Pd was used to make the generators. The 103mRh product was eluted from the generators using 6 mL of 0.1 M HCl with a flow rate 0.5 mL/min. The generator made from SA11AL showed good performance, with a yield of 39 %, an impurity level of 103Pd in the product of 0.29 %, and an operation time of 14 min. This makes this generator competitive with previously developed ones.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138529149","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

Efficient removal of U(VI) from aqueous solution by hydroxyapatite/graphene oxide composite microspheres 羟基磷灰石/氧化石墨烯复合微球高效去除水溶液中的U(VI

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2023-11-17 DOI: 10.1515/ract-2023-0235

Wenjun Wu, Jianlong Wang

{"title":"Efficient removal of U(VI) from aqueous solution by hydroxyapatite/graphene oxide composite microspheres","authors":"Wenjun Wu, Jianlong Wang","doi":"10.1515/ract-2023-0235","DOIUrl":"https://doi.org/10.1515/ract-2023-0235","url":null,"abstract":"Effective treatment of uranium-containing wastewater is of great significance to the sustainable development of nuclear power and the protection of ecological environment. In this study, a highly efficient uranium adsorbent, graphene oxide (GO)/nano-hydroxyapatite (nHA) composite microspheres (nHA@rGO) was synthesized, which could effectively remove uranium from aqueous solution. Under the condition of pH = 3.5, T = 298 K, the maximum adsorption capacity reached 1672.96 mg/g. The results of batch experiments showed that the adsorption capacity of nHA@rGO microspheres was higher than that of nHA microspheres, indicating the enhancement of GO. The adsorption kinetics conformed to the pseudo second-order model. The changes of nHA@rGO microspheres before and after uranium adsorption were analyzed by FT-IR, XPS and XRD. The mechanisms of U(VI) ions adsorption onto nHA@rGO microspheres involved precipitation, surface complexation and ion exchange, in which the hydroxyl and phosphoric acid groups played important roles. The results showed that the prepared nHA@rGO microspheres can be used as an efficient and promising adsorbent for the treatment of uranium-containing wastewater.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":"33 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138529137","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

Studies on the acidification of carbonate waste stream for separation of di-butyl phosphate and recovery of metal 关于酸化碳酸盐废液以分离磷酸二丁酯和回收金属的研究

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2023-11-16 DOI: 10.1515/ract-2023-0196

Satyabrata Mishra, Pankaj, Chayan Patra, Debojyoti Ghosh, N. Desigan, P. Velavendan, K. A. Venkatesan, Ananthasivan Krishnamurthy

引用次数: 0

Efficient extraction of 68Ge from irradiated Ga–Ni alloy via a novel organic-solvent-free separation procedure 新型无溶剂有机分离工艺从辐照镓镍合金中高效提取68Ge

IF 1.8 3区化学

Radiochimica Acta Pub Date : 2023-11-15 DOI: 10.1515/ract-2023-0161

Lingting Xia, Han Wu, Jing Gao, Tianzhen Ye, Long Qiu, Feize Li, Tu Lan, Jijun Yang, Jiali Liao, Ning Liu, Yuanyou Yang

引用次数: 0

Determination of rare earth elements in Algerian bentonites using k ₀-NAA method k0 - naa法测定阿尔及利亚膨润土中的稀土元素