LEAD Action News

LEAD Action News Vol 2 no 3 Winter 1994.  ISSN 1324-6011
Incorporating Lead Aware Times ( ISSN 1440-4966) and Lead Advisory Service News ( ISSN 1440-0561)
The journal of The LEAD (Lead Education and Abatement Design) Group Inc.

Search this site
 
Search tips 
What's New

About Us
bell system lead poisoning
Contact Us
Council Lead Project
egroups
Library-Fact Sheets
Home Page
Media Releases
Newsletters
Q&A
Referral Lists
Reports
Site Map
Slide Shows-Films
Subscribe-Donate
Useful Links

Visitor Number

New Process To Get The Lead Out of Soil

Cognis, a California-based subsidiary of Henkel Corporation (Germany) has developed a process to remove lead from soil, in such a way that the lead can be re-used, and the soil returned to the site. Contaminated soil is separated into its basic physical components of gravel, sand, silt and clay. The gravel is rinsed, tested for metal, then returned to the site if the metal level is low enough. The sand is pumped into a water-filled jig and shaken. The denser particles (lead) settle and are removed. A leachant (the secret bit of the process, patent pending) is added to the sand, to dissolve the remaining metal. This metal can be removed, and the leachant re-used. The sand is returned to the site. The silt and clay go through the same process.

Rewritten from "Chemecology", March/April 1994§

Contents | Previous Item | Next Item

About Us | bell system lead poisoning | Contact Us | Council LEAD Project | egroups | Library - Fact Sheets | Home Page | Media Releases
Newsletters
| Q & A | Referral lists | Reports | Site Map | Slide Shows - Films | Subscription | Useful Links |  Search this Site

Privacy Policy | Disclaimer

Last Updated 12 November 2012
Copyright © The LEAD Group Inc. 1991 - 2012
PO Box 161 Summer Hill NSW 2130 Australia
Phone: +61 2 9716 0014