Water Purification & Filtration Dictionary
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An alphabetical listing of General terms and items. |
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The minimum concentration of a chemical or biological substance which can just be tasted.
trichloroethylene.
The trade name of a high temperature industrial plastic material used in cooking, finishes, bearings, lubricating, plumbing sealants, and a practically inert coating on metal and glass surfaces.
Thin film composite.
Total hardness.
A class of reverse osmosis membranes made with polyamide-based polymer and fabricated with different materials in the separation and support layers.
A small single celled sulfur bacterium which can create hydrogen sulfide gas and the resulting "rotten-egg" odor in water supplies.
Trihalomethanes.
Total organic carbon.
The total concentration of the chlorine in a water, including the combined available chlorine and the free available chlorine.
The total weight of the solids that are dissolved in the water, given in ppm per unit volume of water. TDS is determined by filtering a given volume of water (usually through a 0.45 micron filter), evaporating it at a defined temperature (usually 103 - 105 degrees Celsius) and then weighing the residue.
The total of the amounts of divalent metallic cations, principally calcium hardness and magnesium hardness, expressed in terms of calcium carbonate equivalent.
The sum of all suspended and dissolved matter in a water sample.
The weight of all organic and inorganic solids, both dissolved and suspended, per unit volume of water.
Poisonous (to human beings); capable of producing disease or otherwise harmful to human health when taken into the body.
An element essential to plant and/or animal nutrition in trace concentration of 1% of less.
A substance which is found during water analysis in a small concentration, high enough to be detected , but to low to be quantified accurately by standard testing methods.
The process of plants giving off watery vapor from their leaves and other surfaces.
A toxic volatile organic compound often found as a solvent.
A group of organic chemicals, suspected of being carcinogenic, which are formed in water when chlorine being used as a disinfectant reacts with natural organic matter such as humic acids from decayed vegetation.
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The amount of small particles of solid matter suspended in water as measured by the amount of scattering and absorption of light rays caused by the particles. Turbidity is measured in nephelometric turbidity units (NTU). Potable water should not exceed 0.5 NTU.
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