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Title: Reversible photodeposition and dissolution of metal ions

Abstract

A cyclic photocatalytic process for treating waste water containing metal and organic contaminants. In one embodiment of the method, metal ions are photoreduced onto the photocatalyst and the metal concentrated by resolubilization in a smaller volume. In another embodiment of the method, contaminant organics are first oxidized, then metal ions removed by photoreductive deposition. The present invention allows the photocatalyst to be recycled until nearly complete removal of metal ions and organic contaminants is achieved.

Inventors:
 [1];  [2];  [1]
+ Show Inventor Affiliations
  1. Boulder, CO
  2. Golden, CO
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
869403
Patent Number(s):
5332508
Assignee:
Regents of University of Colorado (Boulder, CO)
Patent Classifications (CPCs):
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02W - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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DOE Contract Number:  
AC04-76
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
reversible; photodeposition; dissolution; metal; cyclic; photocatalytic; process; treating; waste; water; containing; organic; contaminants; embodiment; method; photoreduced; photocatalyst; concentrated; resolubilization; volume; contaminant; organics; oxidized; removed; photoreductive; deposition; allows; recycled; nearly; complete; removal; achieved; catalytic process; waste water; organic contaminant; water containing; organic contaminants; containing metal; treating waste; complete removal; metal concentrate; /210/204/

Citation Formats

Foster, Nancy S, Koval, Carl A, and Noble, Richard D. Reversible photodeposition and dissolution of metal ions. United States: N. p., 1994. Web.
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Foster, Nancy S, Koval, Carl A, & Noble, Richard D. Reversible photodeposition and dissolution of metal ions. United States.
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Foster, Nancy S, Koval, Carl A, and Noble, Richard D. Sat . "Reversible photodeposition and dissolution of metal ions". United States. https://www.osti.gov/servlets/purl/869403.
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@article{osti_869403,
title = {Reversible photodeposition and dissolution of metal ions},
author = {Foster, Nancy S and Koval, Carl A and Noble, Richard D},
abstractNote = {A cyclic photocatalytic process for treating waste water containing metal and organic contaminants. In one embodiment of the method, metal ions are photoreduced onto the photocatalyst and the metal concentrated by resolubilization in a smaller volume. In another embodiment of the method, contaminant organics are first oxidized, then metal ions removed by photoreductive deposition. The present invention allows the photocatalyst to be recycled until nearly complete removal of metal ions and organic contaminants is achieved.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}
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Works referenced in this record:

An investigation of titanium dioxide photocatalysis for the treatment of water contaminated with metals and organic chemicals
journal, September 1993

Copper Photodeposition on TiO2 Studied with HREM and EXAFS
journal, October 1989

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