Process for the treatment of contaminated water based on the use of apolar zeolites having different characteristics
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United States of America Patent
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Mar 11, 2008
Grant Date -
Jul 12, 2007
app pub date -
Dec 6, 2004
filing date -
Dec 22, 2003
priority date (Note) -
Expired
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Abstract
A process is described for the treatment of water contaminated by apolar organic compounds and/or by heavy metals, which consists in circulating the water through a system comprising at least two types of zeolites having a silica/alumina ratio >50, placed in succession, wherein the first zeolite through which the water is passed is characterized by a high absorption capacity and structural channel dimensions ranging from 7 to 50 .ANG., whereas the second is characterized by a high removal capacity of molecules with a molecular diameter comparable with structural channel dimensions ranging from 5 to 7 .ANG..
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