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Title: Catalytic destruction of groundwater contaminants in reactive extraction wells

Abstract

A system for remediating groundwater contaminated with halogenated solvents, certain metals and other inorganic species based on catalytic reduction reactions within reactive well bores. The groundwater treatment uses dissolved hydrogen as a reducing agent in the presence of a metal catalyst, such a palladium, to reduce halogenated solvents (as well as other substituted organic compounds) to harmless species (e.g., ethane or methane) and immobilize certain metals to low valence states. The reactive wells function by removing water from a contaminated water-bearing zone, treating contaminants with a well bore using catalytic reduction, and then reinjecting the treated effluent into an adjacent water-bearing zone. This system offers the advantages of a compact design with a minimal surface footprint (surface facilities) and the destruction of a broad suite of contaminants without generating secondary waste streams.

Inventors:
 [1];  [2]
  1. (Concord, CA)
  2. Stanford, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
874642
Patent Number(s):
6431281
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Classifications (CPCs):
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
catalytic; destruction; groundwater; contaminants; reactive; extraction; remediating; contaminated; halogenated; solvents; metals; inorganic; species; based; reduction; reactions; bores; treatment; dissolved; hydrogen; reducing; agent; presence; metal; catalyst; palladium; reduce; substituted; organic; compounds; harmless; ethane; methane; immobilize; valence; function; removing; water; water-bearing; zone; treating; bore; reinjecting; treated; effluent; adjacent; offers; advantages; compact; design; minimal; surface; footprint; facilities; broad; suite; generating; secondary; waste; streams; reducing agent; catalytic reduction; water contaminated; /166/210/

Citation Formats

McNab, Jr., Walt W., and Reinhard, Martin. Catalytic destruction of groundwater contaminants in reactive extraction wells. United States: N. p., 2002. Web.
McNab, Jr., Walt W., & Reinhard, Martin. Catalytic destruction of groundwater contaminants in reactive extraction wells. United States.
McNab, Jr., Walt W., and Reinhard, Martin. Tue . "Catalytic destruction of groundwater contaminants in reactive extraction wells". United States. https://www.osti.gov/servlets/purl/874642.
@article{osti_874642,
title = {Catalytic destruction of groundwater contaminants in reactive extraction wells},
author = {McNab, Jr., Walt W. and Reinhard, Martin},
abstractNote = {A system for remediating groundwater contaminated with halogenated solvents, certain metals and other inorganic species based on catalytic reduction reactions within reactive well bores. The groundwater treatment uses dissolved hydrogen as a reducing agent in the presence of a metal catalyst, such a palladium, to reduce halogenated solvents (as well as other substituted organic compounds) to harmless species (e.g., ethane or methane) and immobilize certain metals to low valence states. The reactive wells function by removing water from a contaminated water-bearing zone, treating contaminants with a well bore using catalytic reduction, and then reinjecting the treated effluent into an adjacent water-bearing zone. This system offers the advantages of a compact design with a minimal surface footprint (surface facilities) and the destruction of a broad suite of contaminants without generating secondary waste streams.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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