A dense nonaqueous phase liquid or DNAPL is a liquid that is more dense than water and does not dissolve in water. Liquid is one of the principal States of matter. A liquid is a Fluid that has the particles loose and can freely form a distinct surface at the boundaries of Relative density, sometimes called specific density, is the Ratio of the Density of a substance to the density of a given reference material Water is a common Chemical substance that is essential for the survival of all known forms of Life. The term DNAPL is used primarily by hydrogeologists to describe contaminants in groundwater. Hydrogeology ( hydro- meaning water and -geology meaning the study of the Earth) is the area of Geology that deals with the distribution and Groundwater is Water located beneath the Ground surface in Soil pore spaces and in the Fractures of lithologic formations Many chlorinated solvents (or organochlorides), such as trichloroethylene, are DNAPLs. Applications The simplest form of organochlorides are chlorinated Hydrocarbons These consist of simple Hydrocarbons in which one or more hydrogen atoms have The Chemical compound trichloroethylene is a chlorinated Hydrocarbon commonly used as an industrial Solvent. DNAPLs may contain other halogens, such as bromine. Abundance Owing to their high Reactivity, the halogens are found in the environment only in compounds or as Ions Halide ions and oxoanions
DNAPLs can be broken down by methanogens, but only in anoxic conditions. Methanogens are Archaea that produce Methane as a Metabolic byproduct in Anoxic conditions For other uses of the term "hypoxia" see Hypoxia. Hypoxia or oxygen depletion is a phenomenon that occurs in aquatic environments
References
The United States Geological Survey ( USGS) is a scientific agency of the United States government.Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic