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项与 Korea Atomic Energy Research Institute 相关的药物

WO2022265439

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Korea Atomic Energy Research Institute [+1]

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Sejong University Industry Academy Cooperation Foundation [+1]

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100 项与 Korea Atomic Energy Research Institute 相关的临床结果

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11,042

项与 Korea Atomic Energy Research Institute 相关的文献（医药）

2025-06-01·Separation and Purification Technology

Pore-expanded phosphate-functionalized mesoporous silica microsphere composites: One-pot synthesis and application for removing uranium from water

作者: Lee, Dong Woo ; Lim, Sang Ho ; Ho Lim, Sang ; Woo Lee, Dong ; Noh, Hye Ran ; Ran Noh, Hye ; Bon Yoon, Suk ; Kim, Tae-Hyeong ; Kim, Jong-Yun ; Yoon, Suk Bon

This study focused on the development of mesoporous silica microspheres with controllable mesopores for the efficient removal of uranium from nuclear waste.Utilizing n-dodecylamine as a structure-directing agent and di(2-ethylhexyl)phosphoric acid (HDEHP) as a co-templating agent, we achieved the synthesis of large silica microspheres (10-100 μm) with uniform mesopores.The incorporated HDEHP served as both a swelling agent and a phosphate-functionalization reagent, facilitating the adsorption of bulky organic uranium sequestration agents.Our approach circumvented the need for high-temperature calcination and extensive use of organic solvents, making it an environmentally friendly and cost-effective alternative.The synthesized silica microspheres demonstrated superior adsorption capacity for uranyl ions, which was attributed to their large pore size and high surface area.The adsorption isotherms, well-fitted to the Langmuir model, suggested a maximum adsorption capacity of 136 mg g^-1 at pH 4.0 with a uranium concentration of 100 mg L^-1 to maintain a stable soluble phase.However, many studies have often overlooked solid-phase formation due to hydrolysis, which can overestimate the adsorption capacity.In addition, the particle size range enabled easy recovery through low-g-force centrifugation or natural sedimentation.This study highlighted the potential of phosphate-functionalized mesoporous silica microspheres as effective and reusable uranium adsorbents, thereby addressing both energy sustainability and environmental safety.The practical applications of these materials in uranium recovery and nuclear waste management underscore their importance in the nuclear industry.

2025-04-01·Annals of Nuclear Energy

Measurement and calculation of the void reactivity coefficient of the Jordan research and training reactor (JRTR)

作者: Jong Yoo, Han ; Kim, Kyung-O. ; Roh, Gyuhong ; Woo Park, Beom ; Lee, Byungchul

The void reactivity coefficient for the JRTR was evaluated exptl., and the voids in the reactor core were simulated using the specially designed tools of aluminum.These simulators were inserted vertically into the coolant channel between the fuel plates, in the central area of the fuel assembly.The experiments were performed for the scenarios with 4.74 %, 2.37 %, 0 % of void fractions within the reactor core, and a series of calculations for these experiments were performed by using McCARD code with the ENDF/B-VII nuclear library.The results of the calculations for the CARs critical position show good agreement with the corresponding measurement results within 1.8 mm.Also, the void reactivity coefficient in all experiments had neg. values, and the coefficient for the JRTR was exptl. evaluated to be -0.237 $/% void.

2025-04-01·Journal of Hazardous Materials

Eco-friendly synthesis of rod-like hydroxyapatite on spherical carbon: A dual-function composite for selective cobalt removal and enhanced oxygen evolution reaction

Article

作者: Kwak, Cheol Hwan ; Tamang, Sujina ; Han, Young-Kyu ; Ranjith, Kugalur Shanmugam ; Safarkhani, Moein ; Roh, Changhyun ; Mohammadi, Ali ; Huh, Yun Suk ; Rethinasabapathy, Muruganantham

The presence of cobalt ions (Co^2 +) and radionuclides (⁶⁰Co) in industrial and radioactive effluents pose serious threats to environmental ecosystems and human health. This paper presents the synthesis of dual-functional hydroxyapatite (HAp)-incorporated spherical carbon (SC) composite (HAp/SC) towards the selective adsorption of cobalt from wastewater and the utilization of the Co²⁺-adsorbed HAp/SC composite (Co²⁺- HAp/SC) as an electrocatalyst for the oxygen evolution reaction (OER). Herein, we prepared a series of HAp/SC composites by varying HAp weight percentages of 10 %, 20 %, 30 %, 40 %, and 50 %. Among the prepared composites, 20 wt% HAp/SC exhibited the highest Co²⁺ adsorption capacity of 111.03 mg g⁻¹ which was higher than those of individual HAp and SC. The excellent Co²⁺ adsorption performance of 20 wt% HAp/SC composite might be due to the synergistic effects of phosphate groups in HAp, which selectively capture Co²⁺, along with large number of surface -OH and -COOH functional groups of SC through electrostatic, ion-exchange, and surface complexation mechanisms. Batch adsorption experimental data fit well with the Langmuir model (R² = 0.97) suggesting monolayer adsorption of Co²⁺ onto the adsorption sites of HAp/SC. Also, the 20 wt% HAp/SC composite exhibited rapid Co²⁺ adsorption kinetics and effectively describing the pseudo-first-order model (R² = 0.97) with a rate constant (k₁) of 0.14893 min^-1. Additionally, the Co²⁺-HAp/SC composite demonstrates potential as an electrocatalyst for the oxygen evolution reaction (OER), exhibiting an overpotential of 380 mV and a Tafel slope of 39.3 mV dec^-1. This dual functionality suggests the HAp/SC composite for the cobalt removal, with the resulting product serving as an electrocatalyst for OER.

100 项与 Korea Atomic Energy Research Institute 相关的药物交易

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100 项与 Korea Atomic Energy Research Institute 相关的转化医学

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