Filtering: The soil's ability to attenuate substances by retaining chemicals or dissolved substances on the soil particle surface, transforming chemicals through microbial biological processing, retarding movement, and capturing solid particles.
Filtering Facepiece (Dust Mask): A negative pressure particulate respirator with a filter as an integral part of the facepiece or with the entire facepiece composed of the filtering medium.
Filtering: a) The attenuation of a signal's components based on a measurable property (usually frequency). Filtering usually involves a numerical operation which enhances only a portion of the signal. b) Fluid passage through a material which retains ...
filtering through the sand so that cleaner water drains from
the bed.
sanitary sewer. A sewer that transports only wastewaters ...
A filtering practice that uses an organic medium such as peat or compost in the filter bed to filter stormwater runoff.
OUTFALL
The point where water flows from a conduit, stream, or drain.
A filtering system often used in small water systems and individual homes to remove organics. Also used by municipal water treatment plants. GAC can be highly effective in lowering elevated levels of radon in water.
Grassed Waterway ...
Carbon filtering: Charcoal, a form of carbon with a high surface area, adsorbs many compounds including some toxic compounds. Water passing through activated charcoal is common in household water filters and fish tanks.
Filtration: The filtering out of particles during the purification process for drinking water.
Food Web: A community of organisms that are dependent on one another for food.
Gradient: The slope of the streambed profile.
MF Procedure (Membrane Filter Procedure) A test for coliform bacteria that involves filtering the water sample to capture the bacteria, ...
Hartley-Huggins Band of Ozone Absorption - This spectral band in the UV is responsible for the absorption and filtering of solar ultraviolet radiation. Photons with a wavelength longer than 210 nm are weakly absorbed by oxygen in the atmosphere.
Granular Activated Carbon Treatment: A filtering system often used in small water systems and individual homes to remove organics. Also used by municipal water treatment plantsd.
Generic Mapping Tools (GMT) = an open source collection of ~60 tools for manipulating geographic and Cartesian data sets (including filtering, trend fitting, gridding, projecting, etc.) and producing Encapsulated PostScript File (EPS) ...
The downward flow or filtering of water or other liquids through subsurface rock or soil layers, usually continuing to groundwater.
Pesticide ...
Sand Filters: Devices that remove some suspended solids from sewage. Air and bacteria decompose additional wastes filtering through the sand so that cleaner water drains from the bed.
Sanitary Landfill: (See: landfills.) ...
Devices that remove some suspended solids from sewage. Air and bacteria decompose additional wastes filtering through the sand so that cleaner water drains from the bed.
Sanitary Water ...
Some of that water goes through additional filtering, but some does not. NRDC has researched bottled water extensively and has found that it is "subject to less rigorous testing and purity standards than those which apply to city tap water." ...
Buffer - An area of vegetation positioned between a waterbody or watercourse and nearby development. Buffers are valuable for slowing the flow of stormwater into adjacent water resources and for retention and filtering of Non-point Source ...
coagulants : Chemicals that cause very fine particles to clump together into larger particles. This makes it easier to separate the solids from the water by settling, skimming, draining or filtering.
 See also: Water, Environment, Waste, Concentration, Environmental
  
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