Process for reduction of inorganic contaminants from waste streams
AssigneesMAR Systems, Inc., The United States of America as represented by the Administrator of the U.S. Environmental Protection Agency
InventorsClaude Kennard, Michael A. Gonzalez, David C. Szlag
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Abstract
The invention relates to the use of used alumina to reduce the level of inorganic contaminants, such as mercury and arsenic, from waste fluid streams. The invention further provides a process for reducing the level of mercury or arsenic in fluid streams by contacting the fluid stream with used alumina, such as used Claus catalyst.
Claims18
A process for reducing the level of arsenic from a liquid stream comprising contacting said liquid stream with used alumina, wherein the used alumina is used Claus catalyst having a sulfur concentration of 0.1% -2.0% by weight, and wherein the liquid stream is an aqueous stream.
A process for reducing the level of arsenic from a liquid stream containing arsenic, comprising the steps of:
- (a) flowing the liquid stream through a bed containing a sorbent, wherein the sorbent comprises used alumina, wherein the used alumina is used Claus catalyst having a sulfur concentration of 0.1% -2.0% by weight, and wherein the liquid stream is an aqueous stream;
- (b) sorbing arsenic from the liquid stream onto the surface of the sorbent;
- and
- (c) allowing the arsenic-depleted effluent stream to exit from the outlet of the bed.
Dependencies are inferred from the claim text.