Composition and method for remediation of heavy metal contaminated surfaces and soils

摘要

The present invention relates to a composition and method for remediation of heavy metal contaminated substances. More particularly, the present invention relates to a composition and method for remediating soil, paint chips, paint dusts, surfaces, and other substances contaminated with heavy metals by application of an aqueous suspension of phosphate compound. Even more particularly, the present invention relates to remediating soil, paint chips, paint dusts, surfaces, and other substances contaminated with lead by at least one application of an aqueous suspension of tricalcium phosphate, surfactant, hydrophobically-modified hydroxyethylcellulose, and a chloride source.

主权项

1. A composition for heavy metal remediation, said composition comprising:
a) a phosphate compound, selected from the group consisting of tricalcium phosphate, hydroxyapatite, dicalcium phosphate, dicalcium phosphate dihydrate and combinations thereof, wherein said phosphate compound is maintained at a diameter of less than or equal to 0.006 inches in said composition; b) at least one surfactant; c) a primary thixotrope selected from a hydrophobically-modified hydroxyethylcellulose at a concentration of from 0.2 wt % to 0.9 wt % of the composition; d) a chloride source; and e) water.