相关实验视频
Updated: Jul 16, 2025
10:42
Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
Published on: August 10, 2016
18.1K
在漂浮过程中Lignosulfonates的发泡特性
Jhon Chique1, Lina Uribe2,3, Marek Pawlik4
1Department of Metallurgical Engineering, University of Concepcion, Concepción 4040371, Chile.
Polymers
|September 9, 2023
概括
硫酸盐提供了一个环保的替代品硫化 (NaSH) 浮化. 这些化合物表现出表面活性,并影响泡性,泡大小和水回收,影响漂浮效率.
科学领域:
- 矿物加工和提取性金 矿物加工和提取性金
- 表面化学和合体科学
背景情况:
- 使用硫化 (NaSH) 进行传统的铜和化浮动,由于有毒的H2S气体排放和气味,造成环境风险.
- 利格诺硫酸盐已经显示出抑制卜丁的潜力,但它们对漂浮泡特性的影响仍未得到充分研究.
研究的目的:
- 在矿物浮动的背景下,研究三种不同的线硫酸盐样本 (NaLS,CaLS,KLS) 的发泡特性.
- 评估硫酸盐对表面张力,泡性,泡大小分布和水回收的影响.
主要方法:
- 在不同的pH水平上进行了表面张力测量.
- 使用动态发泡能力指数 (DFI) 评估了发泡能力.
- 气泡大小分布和水回收通过在双相系统中的漂浮实验来确定.
主要成果:
- 所有测试的硫酸盐都表现出表面活性,其表面活性随着pH值的增加而降低,并与度和分子量相关.
- 与硫酸盐 (CaLS) 和 kraft 硫酸盐 (KLS) 相比,硫酸盐 (NaLS) 的动态发泡度指数 (DFI) 是最高的.
- 硫酸盐显著影响了泡大小,其中KLS和NaLS对水回收产生了最强烈的影响,与表面张力和泡性发现一致.
结论:
- 硫酸盐具有与矿物浮动过程相关的固有表面活性和泡修饰能力.
- 经过测试的酸硫酸盐,特别是NaLS和KLS,在漂浮中表现出有前途的泡或修饰剂,可能为NASH提供更环保的替代品.
- 对优化硫酸盐结构和应用的进一步研究是有必要的,以增强卜丁酸盐和硫化铜漂浮.
相关概念视频
01:06Coagulation
328
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...
328
03:00Solubility
17.5K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
17.5K
04:01Factors Affecting Solubility
33.5K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
33.5K
01:09Colloidal precipitates
616
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...
616
03:22Colloids
17.6K
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...
17.6K
01:08Sample Preparation for Analysis: Advanced Techniques
389
Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
389