What are the types of non-aqueous phase liquids?

Light, nonaqueous phase liquids (LNAPLs) are slightly soluble organic compounds that float on water. Gasoline, diesel fuel, home heating oil, and related petroleum hydrocarbons are the most common examples.

Is tar a non-aqueous phase liquid?

In general, tar is an opaque viscous liquid, enriched in high molecular weight compounds. The tars from coal gas manufacturing are referred to as coal tars; from carburetted water gas, as water-gas tars; and from oil gas, as oil-gas tars.

Is benzene a DNAPL?

A light non-aqueous phase liquid (LNAPL) is a groundwater contaminant that is not soluble in water and has lower density than water, in contrast to a DNAPL which has higher density than water. Examples of LNAPLs are benzene, toluene, xylene, and other hydrocarbons.

Is oil a NAPL?

For example, crude oil is a nonaqueous-phase liquid (NAPL) composed of a number of compounds, many of which have very low water solubility.

Which is a nonaqueous phase liquid in water?

Nonaqueous Phase Liquid. NAPLs are organic liquids or wastes that are sufficiently immiscible in water such that they may persist as a separate phase in the subsurface for many years.

Which is a light non-aqueous phase liquid ( LNAPL )?

A Light Non-Aqueous Phase Liquid (LNAPL) is a groundwater contaminant that is not soluble in water and has lower density than water, in contrast to a DNAPL which has higher density than water. Once a LNAPL infiltrates the ground, it will stop at the height of the water table because the LNAPL is less dense than water.

What kind of liquid does not dissolve in water?

Non-aqueous phase liquids, or NAPLs, are organic liquid contaminants that do not dissolve in, or easily mix with, water ( hydrophobic ), like oil, gasoline and petroleum products. NAPLs tend to contaminate soil and groundwaters for very long period of time: they are persistent organic pollutants (POPs).

What happens when a NAPL is in a nonaqueous phase?

NAPLs tend to contaminate soil and groundwaters. Many common groundwater contaminants such as chlorinated solvents and many petroleum products enter the subsurface in nonaqueous-phase solutions. They do not mix readily with water and therefore flow separately from ground water. If the NAPL is denser than water,…