Frontiers in Public Health
·
2023
·
IF 5.2
Wang Peng,Yu Shunfei,Zou Hua,Lou Xiaoming,Ren Hong,Zhou Lei,Lai Zhongjun,Xuan Zhiqiang,Gao Xiangjing,Xu Qiuliang,Zhou Zhen,Zhao Yaoxian,Cao Yiyao
Objectives: Radioactivity monitoring around nuclear facilities is crucial to provide important baseline data for effective detection of radioactive leakage to the environment. We aim to establish a baseline study for monitoring radioactive levels of 90Sr and 137Cs around Sammen Nuclear Power Plant (SNPP) and to assess their associated health impact on surrounding residents.Methods: In this study, we collected water and food samples around the SNPP from 2011 to 2020 and determined for 90Sr and 137Cs activity concentrations. We statistically analyzed the temporal trends of 90Sr and 137Cs and evaluated their radiation exposure to the local residents.Results: During this period, the activity concentrations of 90Sr and 137Cs varied within 1.2–9.9 mBq/L and 0.10–7.6 mBq/L in water, and 0.037–1.3 Bq/kg and 0.011–0.45 Bq/kg in food, respectively, with no significant seasonal variation trend.Conclusions: All reported activity concentrations of 90Sr and 137Cs were significantly lower than the recommended value of WHO and Chinese national standards. There is no indication of notable radioactive release into the study area due to the operation of SNPP during 2018–2020. The annual effective doses (AEDs) from the ingestion of 90Sr and 137Cs in water and food were well below the international permissible limits, indicating the radiation exposure around SNPP during 2011–2020 was kept at a safe level.
研究领域:
环境科学
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放射生物学
·
公共健康
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高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Rong Liu,Luyao Yang,Meiying Xie,Fan Yang
The effective separation of coexisting 90 Sr 2+ and 137 Cs + in nuclear wastewater has been a persistent critical issue for water purification and recovery of valuable radioactive materials. In this study, a new monolayer amide modified graphene solid-phase adsorbent material, aminographene-aminocarbonylmethylglycine (AGO-AMG), with specific selectivity was developed to separate Sr 2+ from Cs + . At pH = 12, the simulated separation process of radioactive 90 Sr 2+ from 137 Cs + via AGO-AMG resulted in the highest separation factor ( β Sr/Cs ) = 2982; this value was the largest β Sr/Cs reported in the literature. The adsorption behavior was evaluated through the Langmuir and Freundlich isotherm models, demonstrating a maximum adsorption capacity of 421.94 mg/g for Sr ions. Adsorption elution recirculation experiments were used to examine the separation effect of AGO-AMG, and the results from these experiments confirmed its stable recycling ability. In addition, at ultralow concentrations of 30 ppb of Sr 2+ and Cs + , the removal rate of Sr 2+ remained at approximately 90%, indicating that AGO-AMG had good working ability at ultralow concentrations. Furthermore, the rapid separation capacity of the three-dimensional AGO-AMG films showed that the removal rate of the AGO-AMG films for Sr 2+ could be maintained between 97% and 99% when a syringe was used to add the feed solution at a rate of 4 mL/min and a pH = 12. Therefore, AGO-AMG could be considered a new and efficient solid-phase adsorbent material for the effective separation of 90 Sr 2+ from 137 Cs + in seawater after the discharge of nuclear contaminated water and has industrial application potential.
研究领域:
材料科学
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环境科学
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核废料处理
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ADVANCED MATERIALS
·
2026
·
IF 26.8
Lu Yang,Jun-Hao Tang,Jia-Ting Liu,Shao-Qing Jia,Hai-Yan Sun,Chen Sun,Ya-Dong Wu,Mei-Ling Feng,Xiao-Ying Huang
Selective 137 Cs + sequestration is challenging due to its high solubility, environmental mobility, and the influence of excessive competitive ions. Herein, we demonstrate an effective strategy for Cs + separation by constructing zeolite-type metal sulfide as “cesium ion sieve” (CIS), obtaining GaGeS-1 with “ion-sieving effect”. Its structure features a zeolite-type metal sulfide framework with sodalite (SOD) topology based on supertetrahedral T2 clusters. GaGeS-1 with radiation resistance possesses a maximum Cs + adsorption capacity of 332.52 mg/g and ultrafast adsorption kinetics with removal rate ( R Cs ) of 97.06% within 1.5 min. It achieves highly selective Cs + capture under excessive competing ions, even for actual industrial 137 Cs⁺-liquid-waste ( R Cs > 90%). Single crystal structure analysis and density functional theory calculation reveal that “ion-sieving” originates from strong Cs + ···S 2− interaction, flexible-robust framework, and optimal Cs + coordination in SOD cage. Furthermore, GaGeS-1 is integrated with gelatin to fabricate GaGeS-1/Gel nanofibrous electrospun membranes for a multi-stage filtration system, enabling efficient, continuous, and recyclable treatment of mixed Na/Cs wastewater (3.58 L/m 2 , R Cs = 99.39%) and Cs + -contaminated river water (2.63 L/m 2 , R Cs = 99.23%). This study pioneers an efficient “CIS” by developing zeolite-type metal sulfide, and provides a universal assembly method toward practical application, opening new insight into radiocesium remediation and advanced nuclear waste management.
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Materials
·
2026
·Vol. 19
·期 13
·2835
·
IF 3.7
Yunfeng Shi,Song Yang,Hanhan Liu,Zhou Li,Longjiang Wang,Jun Tan,Weijie Chen,Ting Wang,Aiming Zhang,Bing Lian
To address the issue of radioactive waste generated by the large-scale promotion and use of nuclear energy, safety evaluations of disposal sites in various surrounding rocks are essential. These evaluations are a prerequisite for ensuring the long-term safe disposal of radioactive waste. This study focuses on the blocking capacity of clay rocks concerning the advection–dispersion behavior of representative radionuclides such as137Cs,79Se, and99Tc. It further examines the effects of competitive adsorption that arise when these three radionuclides coexist. (Since79Se is difficult to obtain,75Se was used as a substitute nuclide. In the mixed-nuclide experiments, the stable isotope Re was used to replace99Tc.) The experimental findings revealed that competitive adsorption can significantly reduce the adsorption capability of clay rocks for137Cs and79Se, altering the adsorption mechanism. During the advection–dispersion process, the weak adsorption sites of137Cs and79Se on clay rocks become active after the strong adsorption sites are preferentially occupied, resulting in a decline in both adsorption quantity and rate. In the case of99Tc, competitive adsorption weakens the effect of anion repulsion, leading to a reduction in the immobile liquid regions (θim).
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Siyu Liu,Jianhua Zu,Gang Han,Xiaohan Pan,Yi Xue,Jingjie Diao,Qing Tang,Mingjie Jin
137 Cs is a radioactive pollutant in the production of wastewater from nuclear power plants. In this study, a rapid and simple in-situ synthesis new method was employed to prepare a novel AMP-functionalized UiO-66 composite material for the selective capture of 137 Cs from low-level radioactive wastewater. Characterization techniques such as SEM-EDS, FTIR, XRD, TG, and BET were used to confirm the successful loading of AMP on the surface of UiO-66. UiO-66/AMP showed a good removal effect in pH4-11. At pH7, the effects of different parameters, such as the initial Cs concentration, the ratio of the amount of adsorbent to the volume of solution, and the adsorption time were investigated. The adsorption efficiency is 96.7%, the maximum adsorption capacity is 94.9 mg/g and has fast adsorption kinetics (90% Cs + removal within 5 min). The adsorption data conformed to the pseudo-second-order kinetic model and Langmuir isotherm model, suggesting a monolayer homogeneous adsorption process. XPS helps confirm that the adsorption mechanism is the ion exchange between Cs + and NH 4+ ions. Particularly, in the adsorption experiments of 137 Cs, UiO-66/AMP demonstrated good selectivity (K d Cs : 5.8 × 10 3 ∼ 1.26 × 10 4 mL/g) towards trace Cs + in a mixed ion solution with a molar ratio of 1 (Cs): 2.18 × 10 15 (Na): 4.6 × 10 14 (K): 2 × 10 14 (Mg): 2 × 10 14 (Ca), indicating its potential for selective capture of 137 Cs from low-level liquid waste (LLLW).
研究领域:
环境科学
·
核化学与放射化学
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