Pub Date : 2024-08-29DOI: 10.1007/s10967-024-09717-x
Amandeep Kaur, Khalid Mujasam Batoo, Muhammad Farziq Ijaz, Sangeeta Sharma
(1-x)ZnO–xNiO nanocomposites (where x = 0.05, 0.10, 0.15 and 0.20) have been successfully synthesized using a mechanical mixing approach. Structural phase, morphological, and elemental composition analysis have been carried out using X-ray diffraction, scanning electron microscope, EDX, and XPS analysis. The systematic batch mode adsorption studies were carried out to evaluate the optimized adsorption behavior of synthesized nanocomposites (pH = 6; contact time = 90 min and adsorption dose = 0.5 g/L). Kinetic studies revealed that the prepared nanocomposite (0.80ZnO0.20NiO) successfully adsorbs U(VI) through a chemisorption nature with the maximum Langmuir capacity (~ 151.20 mg/g). The results demonstrated that the prepared 0.80ZnO0.20NiO can be used as a packaging material for column units in water purifiers.
{"title":"Synthesis and characterization of ZnO–NiO composites for efficient U(VI) scavenger","authors":"Amandeep Kaur, Khalid Mujasam Batoo, Muhammad Farziq Ijaz, Sangeeta Sharma","doi":"10.1007/s10967-024-09717-x","DOIUrl":"https://doi.org/10.1007/s10967-024-09717-x","url":null,"abstract":"<p><sub><b>(</b>1-<i>x</i>)</sub>ZnO–<sub><i>x</i></sub>NiO nanocomposites (where <i>x</i> = 0.05, 0.10, 0.15 and 0.20) have been successfully synthesized using a mechanical mixing approach. Structural phase, morphological, and elemental composition analysis have been carried out using X-ray diffraction, scanning electron microscope, EDX, and XPS analysis. The systematic batch mode adsorption studies were carried out to evaluate the optimized adsorption behavior of synthesized nanocomposites (pH = 6; contact time = 90 min and adsorption dose = 0.5 g/L). Kinetic studies revealed that the prepared nanocomposite (<sub>0.80</sub>ZnO<sub>0.20</sub>NiO) successfully adsorbs U(VI) through a chemisorption nature with the maximum Langmuir capacity (~ 151.20 mg/g). The results demonstrated that the prepared <sub>0.80</sub>ZnO<sub>0.20</sub>NiO can be used as a packaging material for column units in water purifiers.</p>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227409","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}
Pub Date : 2024-08-28DOI: 10.1007/s10967-024-09680-7
Noémi Anna Buczkó, Boglárka Maróti, Katalin Gméling, László Szentmiklósi
Recycling electronic waste (WEEE) is a fundamental aspect of the circular economy. To develop technology and assess its economic aspects, the composition characterization of the waste items is crucial. Neutron-based analytical techniques, such as the INAA, in-beam NAA, and PGAA, are applicable to measure the elemental composition of WEEE. These techniques are bulk representative and offer simultaneous determination of the relevant elements without sample dissolution. This study explores the suitability of neutron-based elemental analysis methods for measuring common WEEE items, e.g., printed circuit boards and integrated circuits. Matrix effects mostly related to the thermal neutron self-shielding, were identified and successfully corrected, ensuring accurate mass fraction measurements.
{"title":"Neutron-based analytical techniques for the elemental composition analysis of electronic waste samples: advantages and challenges","authors":"Noémi Anna Buczkó, Boglárka Maróti, Katalin Gméling, László Szentmiklósi","doi":"10.1007/s10967-024-09680-7","DOIUrl":"10.1007/s10967-024-09680-7","url":null,"abstract":"<div><p>Recycling electronic waste (WEEE) is a fundamental aspect of the circular economy. To develop technology and assess its economic aspects, the composition characterization of the waste items is crucial. Neutron-based analytical techniques, such as the INAA, in-beam NAA, and PGAA, are applicable to measure the elemental composition of WEEE. These techniques are bulk representative and offer simultaneous determination of the relevant elements without sample dissolution. This study explores the suitability of neutron-based elemental analysis methods for measuring common WEEE items, e.g., printed circuit boards and integrated circuits. Matrix effects mostly related to the thermal neutron self-shielding, were identified and successfully corrected, ensuring accurate mass fraction measurements.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10967-024-09680-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142219573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The investigation elucidated the impact of pH and ions on the adsorption behavior of Pu(IV) by clay rock and bentonite, two pivotal geological barriers for disposal. Pu(IV) adsorption demonstrated a pronounced dependence on pH. In acidic environments, the adsorption of both clay rock and bentonite was markedly inhibited. Various ions exhibited inhibitory effects on the adsorption. Specifically, the inhibitory effect of Fe3+ was ascribed to the immobilization of Fe3+ hydrolysis products and competitive adsorption. Simultaneously, Pu(IV) formed complexes with both CO32− and HCO3−, hindering the adsorption. Consequently, it is recommended that radioactive waste repositories maintain a low-carbon and iron-salt environment.
{"title":"Investigation of plutonium adsorption by geological materials in China’s radioactive waste repository disposal environment","authors":"Yang-chun Leng, Jin-cai Feng, Qiao Jiang, Ze-hua Li, Hao-xin Feng","doi":"10.1007/s10967-024-09702-4","DOIUrl":"10.1007/s10967-024-09702-4","url":null,"abstract":"<div><p>The investigation elucidated the impact of pH and ions on the adsorption behavior of Pu(IV) by clay rock and bentonite, two pivotal geological barriers for disposal. Pu(IV) adsorption demonstrated a pronounced dependence on pH. In acidic environments, the adsorption of both clay rock and bentonite was markedly inhibited. Various ions exhibited inhibitory effects on the adsorption. Specifically, the inhibitory effect of Fe<sup>3+</sup> was ascribed to the immobilization of Fe<sup>3+</sup> hydrolysis products and competitive adsorption. Simultaneously, Pu(IV) formed complexes with both CO<sub>3</sub><sup>2−</sup> and HCO<sup>3−</sup>, hindering the adsorption. Consequently, it is recommended that radioactive waste repositories maintain a low-carbon and iron-salt environment.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142219572","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}
Pub Date : 2024-08-28DOI: 10.1007/s10967-024-09703-3
Haotong Guo, Qingliang Wang, Zhiwu Lei, Yi Guo, Wei Shi, Eming Hu
In this study, a method of removing uranium from wastewater using Pseudomonas and Enterobacter in indigenous bacterial communities was proposed and demonstrated good removal efficiency. Biological mechanisms were employed to investigate the removal mechanism. The results suggested that the indigenous bacterial community can transform soluble uranyl ions to insoluble uranium-containing precipitates and fix them on the ore surface. Furthermore, hydroxyl, carboxyl, phosphate groups, and proteins of microorganisms were identified as crucial roles in the uranium removal process. These findings reveal the significant potential application value of the indigenous bacterial community for the remediation of uranium wastewater from decommissioned mining areas.
{"title":"The biochemical behavior and process parameters of U (VI) removal induced by microorganisms isolated from wastewater in decommissioned mining area","authors":"Haotong Guo, Qingliang Wang, Zhiwu Lei, Yi Guo, Wei Shi, Eming Hu","doi":"10.1007/s10967-024-09703-3","DOIUrl":"10.1007/s10967-024-09703-3","url":null,"abstract":"<div><p>In this study, a method of removing uranium from wastewater using Pseudomonas and Enterobacter in indigenous bacterial communities was proposed and demonstrated good removal efficiency. Biological mechanisms were employed to investigate the removal mechanism. The results suggested that the indigenous bacterial community can transform soluble uranyl ions to insoluble uranium-containing precipitates and fix them on the ore surface. Furthermore, hydroxyl, carboxyl, phosphate groups, and proteins of microorganisms were identified as crucial roles in the uranium removal process. These findings reveal the significant potential application value of the indigenous bacterial community for the remediation of uranium wastewater from decommissioned mining areas.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142219577","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}
Pub Date : 2024-08-27DOI: 10.1007/s10967-024-09699-w
Xiang Li, Qianhong Huang, Yuxi Xie, Xueyu Gong
This paper delves into the Bayesian statistics applications of three preeminent models, Poisson distribution, Gaussian distribution, and Binomial distribution, in the continuous surveillance of artificial radionuclides. It introduces a slide-window method to accelerate the updating of the prior distribution of model parameters and compares the performances of three models before and after utilizing this method. Comparisons among the three models are made before and after using the slide-window. Experimental results demonstrate a marked enhancement in the performances of all models.
{"title":"Application and improvement of continuous monitoring methods for artificial radionuclides based on Bayesian statistics","authors":"Xiang Li, Qianhong Huang, Yuxi Xie, Xueyu Gong","doi":"10.1007/s10967-024-09699-w","DOIUrl":"https://doi.org/10.1007/s10967-024-09699-w","url":null,"abstract":"<p>This paper delves into the Bayesian statistics applications of three preeminent models, Poisson distribution, Gaussian distribution, and Binomial distribution, in the continuous surveillance of artificial radionuclides. It introduces a slide-window method to accelerate the updating of the prior distribution of model parameters and compares the performances of three models before and after utilizing this method. Comparisons among the three models are made before and after using the slide-window. Experimental results demonstrate a marked enhancement in the performances of all models.</p>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142219574","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}
Pub Date : 2024-08-24DOI: 10.1007/s10967-024-09711-3
Wanqiang Zhou, Yao Li, Chunli Liu
Knowledge of the geochemical behavior of europium is important for the safe disposal of radioactive wastes. Complexing inorganic anions are ubiquitous in repository environments and can affect europium adsorption behaviors significantly. This work comprehensively studied the Eu(III) adsorption on rutile in the presence of complexing inorganic anions. Our results indicated that sulfate and carbonate had a negligible impact on Eu(III) adsorption, while phosphate could strongly enhance the adsorption. The spectral results suggested that phosphate would enhance Eu(III) adsorption by forming a phosphate-bridged complex on rutile surface under acidic conditions, while promoting adsorption by surface precipitation under alkaline conditions.
{"title":"Adsorption of Eu(III) on rutile in the presence of complexing inorganic anions: a combined macroscopic and spectroscopic investigation","authors":"Wanqiang Zhou, Yao Li, Chunli Liu","doi":"10.1007/s10967-024-09711-3","DOIUrl":"https://doi.org/10.1007/s10967-024-09711-3","url":null,"abstract":"<p>Knowledge of the geochemical behavior of europium is important for the safe disposal of radioactive wastes. Complexing inorganic anions are ubiquitous in repository environments and can affect europium adsorption behaviors significantly. This work comprehensively studied the Eu(III) adsorption on rutile in the presence of complexing inorganic anions. Our results indicated that sulfate and carbonate had a negligible impact on Eu(III) adsorption, while phosphate could strongly enhance the adsorption. The spectral results suggested that phosphate would enhance Eu(III) adsorption by forming a phosphate-bridged complex on rutile surface under acidic conditions, while promoting adsorption by surface precipitation under alkaline conditions.</p>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142219576","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}
Pub Date : 2024-08-24DOI: 10.1007/s10967-024-09700-6
Dewi Kartikasari, Dwi Ramadhan, Muhammad Fahrezi Oktafian, Hayu Tyas Utami, Eri Hiswara, Nunung Nuraeni, Muhammad Ilham Bayquni, Heru Prasetio
Lithium tetraborate (Li2B4O7) was synthesized using the precipitation-aided high-temperature solid state technique followed by heating at various sintering temperatures. Then, Li2B4O7 was doped with Mn using several concentrations to find the optimum composition. Manganese-doped lithium tetraborate (Li2B4O7: Mn) was characterized using XRD, SEM, and TL techniques. Li2B4O7: Mn was irradiated using Sr-90 at several irradiation doses to investigate how the material responded to the β radiation. Based on this experiment, the TL dose response is linear for the absorbed dose from 10 to 30 mGy. Such a feature makes this synthesized material a promising material for dosimetry applications.
{"title":"Thermoluminescence study and characterization of Mn-doped Li2B4O7 exposed to beta radiation","authors":"Dewi Kartikasari, Dwi Ramadhan, Muhammad Fahrezi Oktafian, Hayu Tyas Utami, Eri Hiswara, Nunung Nuraeni, Muhammad Ilham Bayquni, Heru Prasetio","doi":"10.1007/s10967-024-09700-6","DOIUrl":"10.1007/s10967-024-09700-6","url":null,"abstract":"<div><p>Lithium tetraborate (Li<sub>2</sub>B<sub>4</sub>O<sub>7</sub>) was synthesized using the precipitation-aided high-temperature solid state technique followed by heating at various sintering temperatures. Then, Li<sub>2</sub>B<sub>4</sub>O<sub>7</sub> was doped with Mn using several concentrations to find the optimum composition. Manganese-doped lithium tetraborate (Li<sub>2</sub>B<sub>4</sub>O<sub>7</sub>: Mn) was characterized using XRD, SEM, and TL techniques. Li<sub>2</sub>B<sub>4</sub>O<sub>7</sub>: Mn was irradiated using Sr-90 at several irradiation doses to investigate how the material responded to the β radiation. Based on this experiment, the TL dose response is linear for the absorbed dose from 10 to 30 mGy. Such a feature makes this synthesized material a promising material for dosimetry applications.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142219575","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}
Pub Date : 2024-08-23DOI: 10.1007/s10967-024-09638-9
Xuan Yang, Jinlu Chen, Dongyang Xu, Zui Tao, Jun Liu, Songbo Tan, Lianyun Wang, Fangzhu Xiao, Guowen Peng
In this study, the thermodynamics and kinetics of U(VI) adsorption and removal on MIL-101(Fe, Cu)/GO from wastewater were studied. The effects of pH, contact time, initial concentration and adsorption temperature were systematically studied. The results showed an effective U(VI) adsorption capacity of the MOF. The adsorption of U(VI) was analyzed by using different isotherms as well as various kinetics models. The results showed that Langmuir adsorption isotherm and quasi-second-order kinetic model were followed by the adsorption of U(VI) on MIL-101(Fe, Cu)/GO. Thermodynamic studies (ΔG < 0, ΔH < 0) demonstrated that the adsorption process is exothermic and spontaneous. The results revealed that MIL-101(Fe, Cu)/GO has a real prospect for the application in the adsorption and removal of U(VI).
{"title":"Uranium (VI) adsorption from aqueous solution by GO wrapped Cu/Fe bimetallic MOF composites","authors":"Xuan Yang, Jinlu Chen, Dongyang Xu, Zui Tao, Jun Liu, Songbo Tan, Lianyun Wang, Fangzhu Xiao, Guowen Peng","doi":"10.1007/s10967-024-09638-9","DOIUrl":"10.1007/s10967-024-09638-9","url":null,"abstract":"<div><p>In this study, the thermodynamics and kinetics of U(VI) adsorption and removal on MIL-101(Fe, Cu)/GO from wastewater were studied. The effects of pH, contact time, initial concentration and adsorption temperature were systematically studied. The results showed an effective U(VI) adsorption capacity of the MOF. The adsorption of U(VI) was analyzed by using different isotherms as well as various kinetics models. The results showed that Langmuir adsorption isotherm and quasi-second-order kinetic model were followed by the adsorption of U(VI) on MIL-101(Fe, Cu)/GO. Thermodynamic studies (Δ<i>G</i> < 0, Δ<i>H</i> < 0) demonstrated that the adsorption process is exothermic and spontaneous. The results revealed that MIL-101(Fe, Cu)/GO has a real prospect for the application in the adsorption and removal of U(VI).</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142219578","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}
Pub Date : 2024-08-23DOI: 10.1007/s10967-024-09705-1
Dominik Boya, Markus Nemetz, Jan M. Welch, Veronika Rosecker, Johannes H. Sterba, Dieter Hainz, Bin Feng, Georg Steinhauser
Neutron irradiation of gold foils in H2O causes the release of 198Au into the liquid in measurable quantities. Experiments prove that irradiation of the foils in water indeed yields 10 times more activity in the liquid than when the foil is removed from the liquid before irradiation. The activity of the gold foil shows no correlation with the yield of ejected 198Au ions, but the duration of neutron irradiation does. However, not all experiments are fully conclusive as no linearity between irradiation duration and emitted 198Au is apparent. A speciation experiment by crystallization reveals that the nuclear reaction produces 198Au3+ ions quantitatively.
{"title":"Production of no-carrier-added aqueous 198Au3+ ions in a Szilárd-Chalmers-like nuclear reaction","authors":"Dominik Boya, Markus Nemetz, Jan M. Welch, Veronika Rosecker, Johannes H. Sterba, Dieter Hainz, Bin Feng, Georg Steinhauser","doi":"10.1007/s10967-024-09705-1","DOIUrl":"https://doi.org/10.1007/s10967-024-09705-1","url":null,"abstract":"<p>Neutron irradiation of gold foils in H<sub>2</sub>O causes the release of <sup>198</sup>Au into the liquid in measurable quantities. Experiments prove that irradiation of the foils in water indeed yields 10 times more activity in the liquid than when the foil is removed from the liquid before irradiation. The activity of the gold foil shows no correlation with the yield of ejected <sup>198</sup>Au ions, but the duration of neutron irradiation does. However, not all experiments are fully conclusive as no linearity between irradiation duration and emitted <sup>198</sup>Au is apparent. A speciation experiment by crystallization reveals that the nuclear reaction produces <sup>198</sup>Au<sup>3+</sup> ions quantitatively.</p>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142219579","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}
Pub Date : 2024-08-22DOI: 10.1007/s10967-024-09701-5
Lam Duy Nhat, Vu Tuan Minh, Ho Van Doanh, Le Huu Loi, Le Quang Vuong, Phan Long Ho, Tran Thien Thanh, Hoang Duc Tam
This study uses fly ash (FA) as a cement replacement in concrete and evaluates the radiological safety of this concrete sample. Different fly ash mixing ratios were investigated and found that with a mixing ratio of 35%, the compressive strength of FA concrete is the highest (from 38 to 48 MPa). Next, we evaluate the radiation safety of the FA concrete by analyzing the isotopes 226Ra, 232Th, and 40K using two low-background gamma spectrometers. The obtained results showed that the use of FA in concrete production is entirely feasible as it meets both construction and radiation safety-related requirements.
本研究使用粉煤灰（FA）作为混凝土中的水泥替代物，并对这种混凝土样品的辐射安全性进行了评估。研究了不同的粉煤灰混合比，发现混合比为 35% 时，粉煤灰混凝土的抗压强度最高（从 38 到 48 兆帕）。接下来，我们使用两台低背景伽马光谱仪分析了 226Ra、232Th 和 40K 等同位素，评估了 FA 混凝土的辐射安全性。结果表明，在混凝土生产中使用 FA 是完全可行的，因为它既符合施工要求，也符合辐射安全相关要求。
{"title":"Determining the appropriate ratio of fly ash as cement replacement in concrete and evaluating the radiation dose of the fly ash concrete","authors":"Lam Duy Nhat, Vu Tuan Minh, Ho Van Doanh, Le Huu Loi, Le Quang Vuong, Phan Long Ho, Tran Thien Thanh, Hoang Duc Tam","doi":"10.1007/s10967-024-09701-5","DOIUrl":"https://doi.org/10.1007/s10967-024-09701-5","url":null,"abstract":"<p>This study uses fly ash (FA) as a cement replacement in concrete and evaluates the radiological safety of this concrete sample. Different fly ash mixing ratios were investigated and found that with a mixing ratio of 35%, the compressive strength of FA concrete is the highest (from 38 to 48 MPa). Next, we evaluate the radiation safety of the FA concrete by analyzing the isotopes <sup>226</sup>Ra, <sup>232</sup>Th, and <sup>40</sup>K using two low-background gamma spectrometers. The obtained results showed that the use of FA in concrete production is entirely feasible as it meets both construction and radiation safety-related requirements.</p>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227468","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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