Particle size selective remediation system and method for heavy metals-contaminated soil by dry-disintegration and separation
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United States of America Patent
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May 16, 2017
Grant Date -
Feb 5, 2015
app pub date -
Mar 21, 2013
filing date -
Mar 22, 2012
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Abstract
The present invention relates to a system and method of remediating heavy metal-contaminated soil using dry disintegration in a particle size-selective manner. The system for remediating contaminated soil comprises: a pretreatment unit for pretreating the contaminated soil to control the water content and the size of the soil; a disintegration unit for disintegrating the pretreated soil into individual particles; a particle separation unit for separating the disintegrated particles a standard particle size; a heavy metal removal unit for peeling off the surface of the separated soil particles larger than the standard particle size using a surface friction force and an impact force to remove heavy metals in dry condition; and a separation and collection unit for separating and collecting the peeled-off surface from the soil particles.
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