Turbidity | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-05-10

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Turbidity


00:01:04 1 Causes
00:03:22 2 Measurement
00:07:33 3 Standards and test methods
00:07:43 3.1 Drinking water standards
00:08:55 3.2 Ambient water standards
00:10:00 3.3 Analytical methods
00:10:33 4 Treatment
00:12:08 4.1 Reagents
00:13:01 5 See also



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SUMMARY
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Turbidity is the cloudiness or haziness of a fluid caused by large numbers of individual particles that are generally invisible to the naked eye, similar to smoke in air. The measurement of turbidity is a key test of water quality.
Fluids can contain suspended solid matter consisting of particles of many different sizes. While some suspended material will be large enough and heavy enough to settle rapidly to the bottom of the container if a liquid sample is left to stand (the settable solids), very small particles will settle only very slowly or not at all if the sample is regularly agitated or the particles are colloidal. These small solid particles cause the liquid to appear turbid.
Turbidity (or haze) is also applied to transparent solids such as glass or plastic. In plastic production, haze is defined as the percentage of light that is deflected more than 2.5° from the incoming light direction.