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Related Concept Videos

Principles Of Column Chromatography01:13

Principles Of Column Chromatography

The chromatography technique was first invented in 1901 by Michael S. Tswett, a Russian botanist, to separate plant pigments using organic solvents. Further, in 1941, Archer John Porter Martin and R. L. M. Synge modified the technique by packing silica gel into a column. A mixture of amino acids was then separated on the packed column using chloroform and water mixture as the mobile phase. This was the first report on column chromatography. At present, column chromatography is a widely used...
Colloidal precipitates01:09

Colloidal precipitates

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...
Coagulation01:06

Coagulation

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...
Ion Exchange01:17

Ion Exchange

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 basic...
The Colloidal State01:29

The Colloidal State

The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called the...

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Electrospinning Fundamentals: Optimizing Solution and Apparatus Parameters
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Polymer-based collectors in flotation: A review.

Patrycja S Bednarek1, Jan Zawala2, Przemyslaw B Kowalczuk1

  • 1Norwegian University of Science and Technology, Department of Geoscience and Petroleum, S. P. Andersens veg 15a, 7031 Trondheim, Norway.

Advances in Colloid and Interface Science
|November 20, 2024
PubMed
Summary

Polymers are emerging as eco-friendly collectors in froth flotation, offering sustainable alternatives to toxic chemicals. These advanced materials show promise in improving mineral recovery and handling low-quality ores.

Keywords:
CollectorFlotationMineral separationPolymer

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Area of Science:

  • Mineral Processing and Materials Science
  • Green Chemistry and Sustainable Engineering

Background:

  • Froth flotation is crucial for mineral/metal production, processing 70-80% of global ore annually.
  • Declining ore quality increases energy, water, and reagent use, alongside environmental concerns from toxic flotation chemicals.
  • The global froth flotation chemicals market is projected to grow 30% in five years, highlighting the need for sustainable solutions.

Purpose of the Study:

  • To review the novel application of polymers as collectors in froth flotation.
  • To examine the performance and adsorption mechanisms of polymer-based collectors.
  • To highlight environmentally friendly alternatives to conventional flotation reagents.

Main Methods:

  • Literature review of studies on polymers (natural, synthetic, nanoparticles, responsive, block copolymers) as flotation collectors.
  • Analysis of adsorption mechanisms and performance metrics (recovery, grade).
  • Evaluation of polymer collectors' effectiveness in handling challenging ore types.

Main Results:

  • Non-toxic polymer formulations, both natural and synthetic, demonstrate effectiveness as environmentally friendly collectors.
  • Polymers enable tailored functionalities for specific separation processes, including nanoparticles and responsive polymers.
  • Polymer collectors achieve mineral recoveries and grades comparable to or exceeding conventional methods.
  • Polymers effectively address challenges posed by declining ore quality, fine particles, and slimes.

Conclusions:

  • Polymers represent a promising, sustainable alternative to traditional toxic collectors in froth flotation.
  • The tunable properties of polymers, such as temperature-responsiveness, offer enhanced functionality and potential for collector recycling.
  • Further research into polymer collectors can mitigate environmental impact and improve efficiency in mineral processing.