Journal of Physical Chemistry C
·
2024
·
IF 3.3
Ze Qiu,Qian Wen,Dong Wu,Wencai Cheng,Congcong Ding,Yi Liu,Xirui Lu
Maximizing the retention of radioactive iodine in the solidified body is the fundamental solution to handling iodine-containing silica gel waste. Herein, the waste was directly treated as one of the raw components of the glass, and the B–Bi–Zn–silica gel material was prepared at 550 °C. Research showed that silica gel was beneficial in increasing the density of the glass to 2.03 g·cm–3. The addition of silica gel caused the formation of a new crystalline phase (Zn2SiO4) in the glass. The glass transition temperature of the B–Bi–Zn glass was 337 °C. The silica gel had no effect on the glass transition temperature of the glass but decreased the heat of the reaction of the material. In addition, it could be concluded from the infrared spectrum that silica gel had a significant effect on the structural unit of the B–Bi–Zn material, and the intensity of the structural unit in the absorption band of 400–1600 cm–1 was weakened. The iodine element was uniformly distributed in the cured glass, and its leaching result of 7 days was 1.1 × 10–4 g·m–2·d–1, indicating that the immobilized matrix of iodine-containing glass-ceramics was stable.
研究领域:
材料科学
·
核化学与放射化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Xuanhao Liang,Guangyuan Chen,Hao Zhang,Ling Zhang,Tao Duan,Lin Zhu
Ti-based MOFs exhibit ultra-high stability in radioactive waste gases containing nitrogen oxides (NO X ) and are effective in capturing radioactive iodine. In this study, NH 2 -MIL-125 was synthesized via a one-pot solvothermal method and its adsorption performance for iodine was investigated using batch adsorption experiments, the stability of materials was tested by simulating post-processing conditions. The results indicated that NH 2 -MIL-125 had a maximum iodine adsorption capacity of 1.61 g/g at 75 ℃ and reached adsorption equilibrium within 60 min, and the adsorption capacity of methyl iodine reached 776.9 mg/g. The material also exhibited excellent stability and iodine adsorption performance in the presence of NO X . After soaking in NO 2 for 24 h, its structure remained stable and the adsorption capacity for iodine remained at 231.5 mg/g. The excellent co-adsorption performance of NH 2 -MIL-125 on iodine and NO X was attributed to the synergistic effects of Ti-OH groups and amino functional groups. These findings provide a reference for the capture of radioactive iodine and also demonstrate the potential of NH 2 -MIL-125 for iodine capture during spent fuel reprocessing .
研究领域:
材料科学
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环境科学
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核能工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xiao-han Pan,Ming-Jie Jin,Jian-hua Zu,Gang Han,Jing-jie Diao,Si-yu Liu,Qing Tang
For the efficient removal of radioactive iodide ions from medium and low radioactive contaminated water, an Ag-doped adsorbent was designed via radiation grafting method and chemical modification and applied based on the solid–liquid adsorption method. The silver loading content in the adsorbents could be flexibly decided by adjusting the sulfhydryl content. SEM/EDS, ATR, XPS, and XRD characterization methods were used to determine the features of the new adsorbents. With the silver content 67.9 mg/g and 125.6 mg/g in the adsorbents PGM25%-Ag + and PGM220%-Ag + respectively, the maximum I − adsorption capacities were varied at 29.92 mg/g and 100.82 mg/g. In wide pH conditions (pH7-11), PGM25%-Ag + was sufficient to achieve 131 I removal efficiency of over 92 %, and the removal efficiency was almost unaffected in the coexistence of high concentration (10 mmol/L) of anions and complex real contaminated seawater, highlighting the applicability and selectivity of the adsorbent. The adsorption behavior conformed to the Langmuir isothermal model and pseudo-second-order kinetics model. XPS analysis confirmed that excellent adsorption capacity and selectivity were attributed to the chemical adsorption mechanism of ion exchange and complexation occurs between I − and Ag on the solid–liquid interface, where AgI precipitation formed. In addition, the Ag + -doping adsorbent withstood the harsh conditions of 200 kGy irradiation by observing the ATR structure, thermal stability, and 131 I removal property. This study provides a feasible solution for the treatment of low and medium-radioactive contaminated seawater.
研究领域:
环境科学
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核化学
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材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Long Liu,Wei Liu,Xiaoliang Zhao,Daimei Chen,Rongsheng Cai,Weiyou Yang,Sridhar Komarneni,Dongjiang Yang
Radioactive iodine isotopes that are produced in nuclear power plants and used in medical research institutes could be a serious threat to the health of many people if accidentally released to the environment because the thyroid gland can absorb and concentrate them from a liquid. For this reason, uptake of iodide anions was investigated on microrosette-like δ-Bi2O3 (MR-δ-Bi2O3). The MR-δ-Bi2O3 adsorbent showed a very high uptake capacity of 1.44 mmol g–1 by forming insoluble Bi4I2O5 phase. The MR-δ-Bi2O3 also displayed fast uptake kinetics and could be easily separated from a liquid after use because of its novel morphology. In addition, the adsorbent showed excellent selectivity for I– anions in the presence of large concentrations of competitive anions such as Cl– and CO32–, and could work in a wide pH range of 4–11. This study led to a new and highly efficient Bi-based adsorbent for iodide capture from solutions.
研究领域:
环境科学
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材料科学
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核医学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Gen Li,Yang Huang,Jing Lin,Chao Yu,Zhenya Liu,Yi Fang,Yanming Xue,Chengchun Tang
Iodine has critical roles in the chemical processes within a living organism and has wide applications in chemical engineering, medicines, material sciences etc. On the other hand, the radioactive iodine could be one of the biggest hidden dangers during the nuclear accidents in the modern nuclear industry. Capture and storage of iodine is of great importance for both applications of iodine and preventing the harmful leakage of radioactive iodine. Herein, we report our efforts in utilization of monolithic boron nitride (BN) foams in capture and reversible storage of iodine in both gaseous and liquid environment. The BN foam consisting of interwoven one-dimensional (1D) porous BN microfibers inherits the merits from h-BN such as high thermal stability and chemical inertness, thus showing great resistance to harsh environments; additionally, the BN foam possesses high porosity and large specific surface areas, which make it reliable as decent adsorbents. The high internal connectivity feature, as well as the presence of a large amount of iodine adsorption sites such as π bonds and functional groups, result in the high iodine uptake capacity. Our study indicates that the adsorption amount of violate iodine by BN foams can achieve ∼212 wt%. The adsorption of iodine by BN foams in n-hexane solution follows the pseudo-second-order model best, and the adsorption isotherms are more accordant with the Freundlich model. In addition, owing to the great chemical stability of the BN foams, the desorption of iodine and recovery of the BN foam adsorbents can be achieved by either washing the foams in ethanol solution or directly heat treatment in N 2 atmosphere at 800 °C for 2 h.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xinqi Liu,Huiling Yuan,Qian Zheng,Bingyuan Huang,Fang Liao,Hejun Gao,Hongquan Fu,Juan Zhang,Yunwen Liao
The effective capture and storage of radioactive iodine is of great significance to the safe use of nuclear energy. In this study, nitrogen- and oxygen-doped carbon nanotubes acted as effective iodine capture agents in a low concentration of iodine solution of approximately 100 mg L −1 . The iodine uptake capacity is proportionate to hydroxy-functional groups as oxygen species and graphitic nitrogen as nitrogen species, respectively, rather than defects and the specific surface area of carbon nanotubes. The essential adsorption activity of oxygen-doped carbon nanotubes is more than 2.5 times that of nitrogen-doped carbon nanotubes, indicating oxygen-doped carbon nanotubes as a potential carbon material in practical applications for the adsorption of iodine. Theoretical study further deepened the understanding of the iodine adsorption sites on carbon nanotubes. This work provided a new method for the design and synthesis of high-performance radioactive iodine solid adsorbents in the future.
研究领域:
材料科学
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环境科学
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核能安全
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xiaojiang Chen,Lielin Wang,Congcong Ding,Hua Xie,Hao Zou,Jiaming Deng,Zhu Liu,Junping Shi,Yun Ding
Radioactive iodine anion wastewater is generated during the operation of nuclear facilities. Efficiently adsorbing and removing radioactive iodine is crucial for the sustainable development of nuclear energy. A potential adsorbent, nano silver-loaded activated carbon fiber (Ag@ACF), was prepared through hydrothermal synthesis and high-temperature vacuum reduction for the efficient removal of iodide anions. The as-prepared Ag@ACF composite has been comprehensively characterized, with silver nanoparticles uniformly distributed on the surface and pore walls of the Ag@ACF, enhancing the adsorption sites for iodine anions. The adsorption performance of Ag@ACF towards iodine anions was evaluated through column and batch experiments, varying silver concentration, adsorbent dosage, pH, contact time, and competing anions. Ag@ACF demonstrated high water stability and a low desorption rate of iodine anions. At a pH of 2, Ag@ACF exhibited a maximum adsorption capacity for iodine anions of 372 mg/g, surpassing most other adsorbents and showing promise for engineering applications. Adsorption kinetics and isotherm analysis indicated that the adsorption process of Ag@ACF primarily involved monolayer homogeneous chemisorption, resulting in the formation of stable AgI. These results suggest that Ag@ACF could serve as a potential adsorbent for removing iodine from radioactive wastewater.
研究领域:
环境科学
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核能工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Hao Zou,Hailong Dong,Wanjiang You,Shilong Song,Lei Liao,Gaoling Liang,Ning Pan,Hao Lei,Xiaoqiang Wang
The bismuth-embedded columnar activated carbon (Bi-AC) composite was prepared by the method of self-reduction and investigated for trapping I 2 and CH 3 I. Our findings showed that the bismuth-based compounds mainly existed as simple substance in Bi-AC. The elemental bismuth was regularly spherical in the shape, and mostly embedded on the surface of activated carbon, seldom inside of activated carbon. The capture capacities of I 2 and CH 3 I by the Bi-AC composite was 569.0 ± 14.2 and 232.1 ± 17.7 mg/g, respectively, which was better than that of the commercial silver-based materials. I 2 was trapped to form I 5 - and Bi(IO 3 ) 3 , while CH 3 I was catalytically cleaved to form BiOI and I 5 - . The Bi-AC composite is expected be used as adsorbents of 129 I to replace silver-based materials due to its high performance and low cost.
研究领域:
环境科学
·
核化学与放射化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·Vol. 333
·期 1
·545-556
·
IF 1.6
Tang Haoming,Zhang Mingzhu,Ran Fengya,Sun Shiyong,Golubev Yevgeny Aleksandrovich,Zhao Qian,Lin Sen,Duan Tao,Kotova Olga Borisovna
The Cu 2 O/Cu modified shungite (ShC) absorbent (Cu 2 O/Cu-ShC) was synthesized by hydrothermal method, benefiting from the mineral backbone and Cu 2 O/Cu particles, Cu 2 O/Cu-ShC can remove ~ 96% of I − within 60 min, the batch experiments showed that the I − adsorption process follows pseudo-second-order model and Langmuir model with maximum adsorption capacity of 10.99 mg/g. The high binding affinity between Cu + and I − contributes effective removal of I − and excellent selectivity at high concentrations of competing ions. This work highlights the feasibility of Cu 2 O/Cu-ShC for the radioactive iodine separation, and provides a promising sorbent material for large-scale purification of radioactive iodine anions in wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Yu Chen,Honglian Liang,Xinbo Qin,Yi Liu,Shuang Tian,Yuanyuan Yang,Shujun Wang
Entrapment of hazardous radioactive iodine has attracted much attention due to the release of radioactive iodine during the application of nuclear energy, such as nuclear waste disposal and nuclear disaster. Deep eutectic solvents (DESs) are deemed as green solvents , designable solvents and solvents of the 21st century. Amino acids are cheap, highly biocompatible and highly biodegradable. Here, we for the first time develop amino acid-based DESs for iodine capture with high efficiency. Effect of structural factors (e.g., mole ratio, composition and composition) and external factors (e.g., mass, concentration and volume of iodine solution) on iodine capture is comprehensively studied. Cysteine:lactic acid (1:8) owns the highest rate and capacity for iodine capture, which shows similar efficiency with previous reports but owns lower cost and higher biodegradability . The high iodine-capturing efficiency of cysteine:lactic acid (1:8) is ascribed to the dominating halogen-bonding interaction (ca. 90%). This work opens a new route for the sustainable capture of radioactive iodine with high efficiency.
研究领域:
环境科学
·
核能工程
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
·
2022
·
IF 2.655
Sheng Liu,Yiyang Zeng,Ai Zhang,Yuxin Song,Yuran Ni,Jiamao Li,Fangting Chi,Chengjian Xiao
Due to the rapid diffusion of radioactive iodine, the demand for safe and efficient capture and storage of radioactive iodine is increasing worldwide. The use of porous carbon materials to capture iodine has aroused great interest. This work prepared porous carbon materials derived from polymetallic oxides of the zeolitic imidazolate framework (ZIF) by pyrolysis at 1000 °C. The carbon materials (CZIF-1000) have a high specific surface area of about 1110 m 2 /g and a total pore volume of 0.92 cm 3 /g. Adsorption studies have shown that the CZIF-1000 had significant adsorption performance for iodine, and the adsorption capacity can reach 790.8 mg/g at 8h. The potential mechanism of adsorption is that the carbonization causes the charge-transfer interaction and pore size distribution. Compared with the conventional adsorbents, the adsorbents showed faster kinetics and high extraction capacity for iodine. This experiment provides an effective method for designing a highly efficient adsorbent for iodine and broadens the ideas for developing new iodine extraction adsorbents.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Sheng Liu,Yiyang Zeng,Jun Liu,Jiamao Li,Hao Peng,Hui Xie,Hao Zou,Chengjian Xiao,Xiaohui Hua,Jingliang Bao,Liang Xian,Yuanli Li,Fangting Chi
The capturing and storage of iodine from nuclear waste through secure and advantageous techniques are significant. In this work, a novel bismuth-based porous carbon material referred to as Bi@MVF is elaborately synthesized employing a dipping-reduction technique to seize iodine-129 ( 129 I), in which bismuth particles are uniformly embedded and allotted on the porous carbon network as multiple active sites. Accordingly, Bi@MVF lets in a highly-efficient iodine absorption potential of up to 1560 mg/g after publicity to iodine at 120 ℃ for 4 h, superior to most standard iodine adsorbents. The excessive adsorption kinetics of these Bi@MVF adsorbents is typically attributed to the specific porous carbon substrates' full-size particular surface area and the adsorbent’s synergistic effect. An in-depth perception of the iodine adsorption mechanism exhibits that the chemical adsorption turns into a powerful mechanism via the reaction between bismuth and iodine to structure a steady section BiI 3 . Moreover, an easy post-treatment system for these Bi@MVF adsorbents is adopted to gain the greater corrosion-resistant iodine-binding segment Bi 5 O 7 I, attaining a nominal iodine leaching rate. Therefore, the designed Bi@MVF will be a tremendous 129 I stabilizer, and we will contribute a new approach for customizing new iodine adsorbents with excessive adsorption doses.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
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