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Oil Skimming: What is a DNAPL? | Abanaki

DNAPL is short for dense non-aqueous phase liquid. Common DNAPLs include creosote, coal tar, and heavy oils; common DNAPL applications include degreasing and acting as a solvent. On the other hand, DNAPLs can also be the byproduct of industrial processes; in particular, a form of DNAPL known as multi-compound waste is a common type of waste oil. The defining aspect of DNAPLs, density, causes the mixture to sink in liquids like water or coolant. Because the sludge sinks, surface skimmers like rope skimmers have issues treating DNAPLs. Additionally, the density tends to cause problems with devices requiring a pump for collections because of its density, clogging the pipe or even breaking the pump itself.Abanaki May 2020 Blog#2