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Title: In situ formation of phosphate barriers in soil

Abstract

Reactive barriers and methods for making reactive barriers in situ in soil for sequestering soil ontaminants including actinides and heavy metals. The barrier includes phosphate, and techniques are disclosed for forming specifically apatite barriers. The method includes injecting dilute reagents into soil in proximity to a contamination plume or source such as a waste drum to achieve complete or partial encapsulation of the waste. Controlled temperature and pH facilitates rapid formation of apatite, for example, where dilute aqueous calcium chloride and dilute aqueous sodium phosphate are the selected reagents. Mixing of reagents to form precipitate is mediated and enhanced through movement of reagents in soil as a result of phenomena including capillary action, movement of groundwater, soil washing and reagent injection pressure.

Inventors:
 [1]
  1. (Edgewood, NM)
Issue Date:
Research Org.:
SANDIA CORP
OSTI Identifier:
874564
Patent Number(s):
6416252
Assignee:
Sandia Corporation (Albuquerque, NM) SNL
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
situ; formation; phosphate; barriers; soil; reactive; methods; sequestering; ontaminants; including; actinides; heavy; metals; barrier; techniques; disclosed; forming; specifically; apatite; method; injecting; dilute; reagents; proximity; contamination; plume; source; waste; drum; achieve; complete; partial; encapsulation; controlled; temperature; ph; facilitates; rapid; example; aqueous; calcium; chloride; sodium; selected; mixing; form; precipitate; mediated; enhanced; movement; result; phenomena; capillary; action; groundwater; washing; reagent; injection; pressure; capillary action; situ formation; /405/588/

Citation Formats

Moore, Robert C. In situ formation of phosphate barriers in soil. United States: N. p., 2002. Web.
Moore, Robert C. In situ formation of phosphate barriers in soil. United States.
Moore, Robert C. Tue . "In situ formation of phosphate barriers in soil". United States. https://www.osti.gov/servlets/purl/874564.
@article{osti_874564,
title = {In situ formation of phosphate barriers in soil},
author = {Moore, Robert C.},
abstractNote = {Reactive barriers and methods for making reactive barriers in situ in soil for sequestering soil ontaminants including actinides and heavy metals. The barrier includes phosphate, and techniques are disclosed for forming specifically apatite barriers. The method includes injecting dilute reagents into soil in proximity to a contamination plume or source such as a waste drum to achieve complete or partial encapsulation of the waste. Controlled temperature and pH facilitates rapid formation of apatite, for example, where dilute aqueous calcium chloride and dilute aqueous sodium phosphate are the selected reagents. Mixing of reagents to form precipitate is mediated and enhanced through movement of reagents in soil as a result of phenomena including capillary action, movement of groundwater, soil washing and reagent injection pressure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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