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Related Concept Videos

Coagulation01:06

Coagulation

1.6K
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...
1.6K
Colloidal precipitates01:09

Colloidal precipitates

6.6K
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...
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Colloids03:22

Colloids

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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...
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Colloids and Suspensions01:17

Colloids and Suspensions

3.7K
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 visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
3.7K
The Colloidal State01:29

The Colloidal State

45
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...
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Flow Cytometry01:23

Flow Cytometry

16.8K
The development of flow cytometry techniques began in 1934 with initial attempts by Andrew Moldavan, a bacteriologist who counted the cells in a flowing capillary system. Moldavan pumped cells through a capillary tube focused under a microscope for visualization. The invention of photometry allowed the measurement of differentially-stained cells, and Louis Kamentsky developed the first multiparameter flow cytometer in 1965 to identify and count the cancer cells in cervical tissue specimens.
In...
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Related Experiment Video

Updated: Mar 7, 2026

Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts
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Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts

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Flocculation and me.

Yoshimasa Watanabe1

  • 1Research and Development Initiatives, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.

Water Research
|February 24, 2017
PubMed
Summary
This summary is machine-generated.

This study reviews research on flocculator design, developing a theoretical protocol for flocculation processes. It integrates floc characteristics, kinetics, and engineering aspects to improve water treatment efficiency.

Keywords:
Effective energy dissipation rateFloc density functionFloc strength functionFlocculation kineticsIsotropic turbulence

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Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies
  • Chemical Engineering

Background:

  • Flocculation is a critical pretreatment step in rapid sand filtration systems.
  • Effective flocculation reduces solid load in sedimentation basins, enhancing downstream sand filter performance.
  • Current design and operation of flocculators often rely on empirical methods.

Purpose of the Study:

  • To establish a theoretical protocol for designing and operating flocculators.
  • To bridge the gap between empirical and theoretical approaches in flocculation research.
  • To integrate diverse aspects of flocculation for improved process understanding.

Main Methods:

  • Review of previous experimental and simulation data on flocculation.
  • Integration of floc characteristics (density, strength functions) and flocculation kinetics (Levich's Equation).
  • Consideration of engineering aspects relevant to flocculator design and operation.

Main Results:

  • Proposed floc density and floc strength functions as key floc attributes.
  • Applied Levich's Equation to model basic collision kinetics under diffusion control.
  • Demonstrated engineering applications of the developed flocculation research.

Conclusions:

  • A theoretical framework for flocculator design and operation has been established.
  • The integration of floc characteristics, kinetics, and engineering aspects provides a comprehensive approach.
  • The findings offer a pathway to more efficient and predictable water treatment processes.