For other uses, see Bubble curtain and Air curtain (disambiguation).
Oil terminal with pneumatic barrier
A pneumatic barrier is a method to contain oil spills. It is also called a bubble curtain. Air bubbling through a perforated pipe causes an upward water flow that slows the spread of oil. It can also be used to stop fish from entering polluted water. A further application of the pneumatic barrier is to decrease the salt-water exchange in navigation locks and prevent salt intrusion in rivers.
.[1]
Pneumatic barriers are also known as air curtains.
The pneumatic barrier is a (non-patented) invention of the Dutch engineer Johan van Veen from around 1940
.[2]
A pneumatic barrier is an active (as opposed to passive) method of waterway oil spill control. (An example of a passive method would be a containment boom.)
^Abraham, G.; Van der Burg, P.; De Vos, P. (1973). "Pneumatic barriers to reduce salt intrusion through locks". Rijkswaterstaat Communications 17. RWS-Communications. 17. The Hague, Netherlands: Rijkswaterstaat.
^
Van Veen, Johan (7 March 1941). "Twee middelen om het zoutbezwaar bij zeesluizen op te heffen" [Two methods to solve the salt-intrusion problems at navigation locks]. De Ingenieur. 56 (10): B33-34.
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