The spelling of "filtering colloid" can be a bit tricky due to the various pronunciation nuances. In IPA phonetic transcription, it is spelled as /ˈfɪltərɪŋ kɒlɔɪd/. The first syllable sounds like "fil," with the "i" pronounced as in "hit." The second syllable has a short "u" sound, as in "but." The stress falls on the second syllable. The word "colloid" is pronounced with stress on the first syllable, with the "oi" sounding like "oy." It is important to note that in scientific terminology, pronunciation may vary depending on the region or field.
A filtering colloid refers to a type of colloid that can be separated or purified using various filtration techniques. Colloids are a class of mixtures consisting of tiny particles suspended in a medium, typically a liquid or a gas. Within colloids, there are different types based on the size and nature of the particles dispersed in the medium. A filtering colloid consists of larger particles compared to other colloidal systems, making it more amenable to separation through filtration.
Filtration is a process that involves passing a mixture through a porous material or medium, allowing the smaller particles or components to pass through while retaining the larger ones. In the case of a filtering colloid, a suitable filter medium is used to selectively separate or remove the larger particles from the mixture. This separation technique relies on the size difference between the colloidal particles and the filter pores to effectively accomplish the separation.
The efficiency of filtering colloids depends on factors such as the size, shape, and charge of the particles, as well as the type of filter medium and its pore size. The filter medium can be comprised of materials like paper, cloth, or membranes specially designed with specific porosities.
Filtering colloids find numerous applications in various industries such as food and beverage, pharmaceuticals, chemical engineering, and wastewater treatment. By employing suitable filtration techniques, these industries can effectively purify and separate colloidal mixtures, ensuring the removal of unwanted or harmful particles and producing desirable products or substances.
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A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "filtering" comes from the verb "filter", which ultimately derives from the Latin word "filtrare", meaning "to strain through a sieve".
The term "colloid" has its roots in the Latin word "collīgāre", which means "to glue together". In the late 19th century, Thomas Graham, a Scottish chemist, introduced the term "colloid" to describe substances that have small particles that remain dispersed (rather than dissolved) in a medium, such as liquids or gels.
The combination of these two terms, "filtering" and "colloid", in the phrase "filtering colloid" refers to a colloid that can be filtered, or that has the ability to pass through a filter. It is typically used to describe substances or solutions where the dispersed particles are small enough to be separated or removed by filtration.