Turbidity

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turbidity

[tər′bid·əd·ē]

(analytical chemistry)

Measure of the clarity of an otherwise clear liquid by using colorimetric scales.

Cloudy or hazy appearance in a naturally clear liquid caused by a suspension of colloidal liquid droplets or fine solids.

(astronomy)

The formation of disks centered on stars in long-exposure photographs as a result of light scattering by grains in the emulsion.

(meteorology)

Any condition of the atmosphere which reduces its transparency to radiation, especially to visible radiation.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Turbidity

the capacity of an optically nonuniform medium to scatter light passing through it (see). The extinction coefficient is a quantitative characterization of turbidity and is given by the equation.

τ ═ (l/I) ln (I₀/I)

where I₀ and I are the intensities of a light beam before and after passage through a layer of the medium of thickness l. Turbidity is determined by methods of nephelometry and turbidimetry.

References in periodicals archive ?

Turbidity: Turbidity is a measure of the degree to which the water loses its transparency due to the presence of suspended particulates.

Keep Tahoe Blue's 2nd Bi-Annual Basin Blitz Shows Promising Results

Samples from filter water 8.16% were unfit physico- chemically; again only turbidity was the affected parameter.

Purview: Quality of Drinking Water in Rawalpindi and Islamabad

Explanation of the field study results is complicated because what bass eat is a function of the habitats they select, which may change with turbidity, and the habitats the prey use, which also may change with turbidity.

Turbidity and Bass Feeding

Turbidity map (February 2017) of Manila Bay using Landsat-8 data

Diwata-1 images help monitor, sustain Manila Bay rehab

Among physical parameters, slightly high pH value was observed only in tap water of Lahore museum and Badshahi mosque (8.60).Filtered and tap water in historical places was found with highest concentration of turbidity and fluoride at Badshahi mosque and Data Darbar, respectively while Lahore museum was observed for highest concentration of total hardness, pH and TDS (Table 03).

EVALUATION OF DRINKING WATER QUALITY AT VARIOUS PUBLIC PLACES IN LAHORE CITY PAKISTAN

At low salt concentrations, the micelles were initially stable for approximately 5 minutes before a decrease in turbidity indicated micellar dissociation had occurred.

Emulsifying salts, time, temperature, pH affect micellar stability

If the criteria of the trajectories for carbon dioxide emissions (called RCPs) is 8.5, the nightmare scenario in which emissions continue to increase rapidly will happen through the early and mid-parts of the century, making it necessary to push for a concentrated effort in lowering the turbidity before 2050.

Projections of Gastrointestinal Illness Patients in the US-water

As it can be seen from Figure 2, when different quantities of chitosan are added to the raw water, the turbidity of the treated water is between 7 and 9.

Application of Chitosan Composite Flocculant in Tap Water Treatment

The mathematical relation between turbidity output in millivolt (mV) and nephelometric turbidity units (NTU) was performed using a solution of polymers (polymer bead calibration solutions).

Sampling strategies to estimate suspended sediment concentration for turbidimeter calibration/Estrategias de amostragem para estimar a concentracao de sedimentos em suspensao para a calibracao do turbidimetro

Researcher Anneclaire De Roos from Drexel University in Philadelphia, US found associations between acute gastrointestinal illness (AGI) and water turbidity, a term meaning cloudiness or opacity.

Cloudy water increases risk of gastrointestinal illnesses: Study

Turbidity, a measure of the cloudiness of water, has often been used as a proxy for microbiological contamination.

Review of epidemiological studies of drinking-water turbidity in relation to acute gastrointestinal illness

Two lowest gains that are fractional gains of 0,05 and 0,1 turned out to be the most useful for turbidity values in tested range that was up to 800 NTU (Nephelometric Turbidity Unit).