Filtration Impurity Removal
Filtration Impurity Removal - Related Videos
09:14
Glovebox and Impurity Sensors
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2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University The glovebox provides a straightforward means to handle air- and moisture-sensitive solids and liquids. The glovebox is what it sounds like: a box with gloves attached to one or more sides, which allows the user to perform manipulations within the glovebox under an inert atmosphere. For manipulations under inert atmospheres, chemists can choose between Schlenk or high-vacuum techniques and a glovebox. Schlenk and...
01:32
Filtration and Urine Formation
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2019
The function of the kidneys is to filter, reabsorb, secrete, and excrete. Every day the kidneys filter nearly 180 liters of blood, initially removing water and solutes but ultimately returning nearly all filtrates into circulation with the help of osmoregulatory hormones. This process removes wastes and toxins but is also crucial to maintain water and electrolyte levels. Most of these functions are performed by the tiny but numerous nephrons contained within the kidneys. Blood enters the renal...
01:26
Glomerular Filtration: Net Filtration Pressure
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2025
Glomerular filtration, a key process in the kidneys, is regulated by three main pressures: Glomerular blood hydrostatic pressure (GBHP), Capsular hydrostatic pressure (CHP), and Blood colloid osmotic pressure (BCOP). GBHP, with an average value of 55 mmHg, promotes filtration by pushing water and solutes through the filtration membrane. This is balanced by two opposing forces: CHP, a "back pressure" exerted against the filtration membrane by fluid already in the capsular space and renal tubule,...
00:53
Filtration
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2024
Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
10:58
Isolation of Fecal Bacteria from Water Samples by Filtration
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Luisa Ikner The quality of water destined for use in agricultural, recreational, and domestic settings is of great importance due to the potential for outbreaks of waterborne disease. Microbial agents implicated in such events include parasites, bacteria, and viruses that are shed in high numbers in the feces of infected people and animals. Transmission to new and susceptible hosts may...
FAQs
The driving force controls how the mixture moves through the porous medium. Gravity provides passive flow, whereas vacuum or applied pressure promotes passage through the filter. In each case, retained particles remain on the filter while the clarified liquid or gas is collected, so the selected driving force affects the practical filtration setup.
Filter selection balances impurity retention against recovery of the desired substance. The pore size must be small enough to retain suspended or undissolved particles, while the filter material must suit the mixture. Poor selection can allow particulate contamination to pass or cause unwanted loss of the desired material during clarification or collection.
As filtration proceeds, retained material may accumulate as a filter cake on the porous medium. In chemistry, this cake represents the separated particulate fraction and can be relevant when collecting a precipitate. Its formation concentrates the removed solids on the filter while the clarified liquid or gas passes through.
A chemistry workflow starts by choosing a porous medium and pore size suited to the particles that must be removed. The mixture is then moved through the medium using gravity, vacuum, or applied pressure. The clarified liquid or gas is collected separately from retained material, which may accumulate as a filter cake or be collected as a precipitate.
In chemistry, Filtration Impurity Removal supports solution clarification, precipitate collection, and sample preparation before further work. These applications differ in emphasis: clarification prioritizes a cleaner liquid, whereas precipitate collection prioritizes recovery of the retained solid. In both cases, filter choice helps reduce particulate contamination while limiting loss of the desired substance.
If particles remain in the clarified phase or some desired material is removed, reassess the pore size and filter material first. Pores that are too large may fail to retain unwanted particles, while an unsuitable material can contribute to loss of the desired substance. This evaluation links separation quality directly to filter selection.