在泡漂浮中聚合精细的水友性材料,通过同型聚合漂浮工艺提高分离效率
1Department of Chemical and Materials Engineering, University of Alberta, 9211-116 Street NW, Edmonton, Alberta T6G 1H9, Canada.
Advances in colloid and interface science
|February 21, 2024
概括
泡漂浮与细颗粒进行斗争. 本次审查提出 homo-aggregation漂浮 (HAF) 选择性聚合细液友颗粒,提高分离效率和矿物加工中的产品等级.
科学领域:
- 矿物加工和材料科学 矿物加工和材料科学
- 应用物理化学应用物理化学
背景情况:
- 泡漂浮是资源回收和回收的关键分离技术,依赖于表面的疏水性.
- 在处理细颗粒 (<20微米) 和超细颗粒 (<5微米) 时,分离效率和选择性显著下降.
- 微型水友颗粒通过减少回收,增加粘度和通过引进降低产品等级,对泡漂浮产生不利影响.
研究的目的:
- 分析泡漂浮中微型水友性颗粒的有害影响.
- 总结现有的缓解策略,以应对漂浮中的微粒挑战.
- 提出一种全新的Homo-Aggregation Flotation (HAF) 概念,用于增强细颗粒分离.
主要方法:
- 关于微型水友颗粒冲击和当前缓解技术的文献综述.
- 分析物理和机械方法来解决细颗粒问题.
- 介绍和概念化的人类聚合浮动 (HAF) 方法.
主要成果:
- 确定了微型水友颗粒对泡漂浮性能的显著负面影响.
- 确定了当前物理/机械缓解策略的局限性.
- 提交了案例研究,展示了聚合精细水友性材料以改善分离的潜力.
结论:
- 微型水友颗粒对高效和选择性的泡漂浮构成了重大挑战.
- 精细水友颗粒的选择性聚合是一种增强分离的有希望的策略.
- 拟议的Homo-Aggregation Flotation (HAF) 为改善细颗粒回收和分级提供了一个新的方向.
相关概念视频
Coagulation
297
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
297
Colloidal precipitates
580
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
580
Overview Of Cell Separation And Isolation
5.7K
Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.
5.7K
Colloids
17.5K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.5K
Centrifugation
2.2K
Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...
2.2K
Subcellular Fractionation
7.0K
The homogenate obtained after cell lysis contains various membrane-bound organelles that can be further separated into pure fractions by subcellular fractionation. These isolates are used to study specific cellular components, analyze localized protein activity, and are even employed in diagnostics. Fractionation is typically achieved using centrifugation methods, the most common being density-gradient and differential centrifugation.
Differential Centrifugation
Differential centrifugation is...
Differential Centrifugation
Differential centrifugation is...
7.0K


