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Nuclear Transmutation03:20

Nuclear Transmutation

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Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed...
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Redox Reactions01:24

Redox Reactions

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Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
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Redox Reactions01:27

Redox Reactions

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Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
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Redox Equilibria: Overview01:23

Redox Equilibria: Overview

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A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
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Redox Titration: Other Oxidizing and Reducing Agents01:26

Redox Titration: Other Oxidizing and Reducing Agents

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Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
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相关实验视频

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Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability
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用于捕获和释放的可转化碳酸

Megan Keener1, Camden Hunt1, Timothy G Carroll1

  • 1Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, USA.

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|January 24, 2020
PubMed
概括

这项研究引入了一种用于控制 (UO2^2+) 捕获和释放的新型碳酸分子. 电化学方法可以有效地进行分离,为核废物整治和回收提供了新的方法.

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科学领域:

  • 无机化学
  • 材料科学
  • 电化学

背景情况:

  • 离子 (UO2^2+) 在核燃料循环和环境修复中普遍存在.
  • 目前的烯捕获方法往往缺乏高效和非破坏性的释放机制.
  • 在核废物管理方面,控制捕获的乌兰的释放仍然是一个重大挑战.

研究的目的:

  • 为控制离子的捕获和释放开发一种新材料.
  • 调查可转化氧化分子在化物分离中的使用.
  • 探索捕获和释放的电化学方法.

主要方法:

  • 合成和表征一个体位替代的密封碳素分子 (1,2-(Ph2PO)2-1,2-C2B10H10).
  • 利用碳酸的可氧化转换合性质来结合.
  • 使用化学和电化学方法在有机和双相系统中捕获和释放.

主要成果:

  • 克洛索 - 碳素分子证明有效捕获乌拉尼尔.
  • 通过改变carborane的氧化还原状态来实现控制的uranyl释放.
  • 电化学方法有助于有效地捕获和释放,显示出实际应用的潜力.

结论:

  • 可转氧切换的碳酸分子为控制的化物分离提供了一个有前途的平台.
  • 电化学捕获和释放系统可以补充现有的核废物处理技术.
  • 这种方法提供了一种非破坏性和高效的离子管理方法.