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相关概念视频

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
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相关实验视频

Updated: Jan 17, 2026

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide
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绿色创新:亚酸盐基聚合物在去除Cr (VI) 方面表现出色.

Zhixuan Gong1, Junjie Liu1, Jia Wen2

  • 1College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha, 410082, China.

Journal of environmental management
|September 24, 2025
PubMed
概括

一种新型聚合物材料 (APP) 有效地从废水中去除有毒的六价 (Cr(VI)). 这种坚固,可重复使用的材料在各种pH水平上起作用,为环境修复提供了可持续的解决方案.

关键词:
亚斯科布酸是一种亚斯科布酸.散装材料的散装材料是什么(VI) 整治 整治 整治聚乙烯胺氨酸的聚乙烯胺氨酸.聚乙烯醇的使用方法

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科学领域:

  • 环境化学环境化学
  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学

背景情况:

  • 六价 (Cr(VI)) 对生态系统和人类健康构成重大风险.
  • 现有用于Cr(VI) 清除的纳米材料面临回收,pH限制和机械强度差的挑战.

研究的目的:

  • 合成和评估一种新型散装聚合物材料 (APP),以有效地从废水中消除CrVI.
  • 解决先前材料的局限性,重点关注可回收性,pH适应性和机械强度.

主要方法:

  • 宏性聚合物材料 (APP) 的绿色合成,使用亚酸,聚乙烯醇和聚乙烯胺.
  • 描述APP的物理特性,包括孔径大小,机械强度和Cr (VI) 吸附能力.
  • 研究不同pH值和混合重金属溶液中的Cr(VI) 去除效率,以及可重复使用性研究.

主要成果:

  • APP显示出高的Cr6去除效率 (pH2时100%,pH11时80.4%) 和在混合重金属溶液中优先吸附.
  • 巨孔材料 (∼3-4毫米) 具有出色的机械强度,性和良好的重复使用性 (>80%效率在6个循环后).
  • 这些机制包括静电吸引,离子交换,氧化减氧和复杂化.

结论:

  • 合成的APP材料提供了一个有希望的,稳定的和可重复使用的解决方案,用于从废水中去除Cr.
  • APP克服了先前材料的关键局限性,使其能够在更广泛的pH条件下进行有效处理.
  • 这项研究提出了一种新的方法,用于开发功能性,可调节pH值的材料,用于环境修复.