Removal of copper from aqueous streams using an iron promoted activated alumina
View Patent ↗Techniques for reduction of copper from aqueous streams using an iron promoted activated alumina are disclosed. An adsorbent media composition that reduces copper levels in an aqueous feed stream includes an iron containing activated alumina. A process for reducing copper levels in an aqueous fluid using an iron promoted activated alumina sorption media includes contacting the aqueous fluid containing a copper contaminant with the iron promoted activated alumina to achieve reductions in copper from the aqueous fluid.
1. A method of reducing an amount of copper species present in an aqueous stream comprising contacting the aqueous stream with an iron promoted activated alumina sorption media, wherein the iron promoted activated alumina sorption media comprises granular particles comprising a blend of activated alumina with iron oxide, wherein the iron promoted activated alumina sorption media has a macroporosity (>750 A) of 0.05 to 0.15 cc/gram.
2. The method of claim 1 , wherein the copper species is dissolved in the aqueous stream at ppm to ppb levels.
3. The method of claim 1 , wherein the contacting the aqueous stream with the sorption media includes as least one of (i) flowing the aqueous stream through a bed comprising the sorption media, (ii) soaking the aqueous stream into the sorption media, and (iii) performing a fill-hold-drain batch treatment on the aqueous stream with the sorption media.
4. The method of claim 1 , wherein the aqueous stream is in contact with the sorption media composition for a time from about 1 second to about 30 days.
5. The method of claim 4 , wherein the aqueous stream is in contact with the sorption media composition for a time from about 1 minute to about 60 minutes.
6. The method of claim 1 , wherein the aqueous stream is at least one of an industrial, municipal, oilfield, sea water, and ground water source, wherein the aqueous stream comprises varied amounts of total dissolved solids and copper.
7. The method of claim 1 , wherein the copper species includes at least one of copper nitrate, copper chloride, metallic copper, copper sulfate, copper selenate, cuprous chloride, and copper fluoride.
8. The method of claim 1 , wherein the sorption media includes between about 0.1% and about 20% by weight of iron oxide.
9. The method of claim 8 , wherein the sorption media includes between about 99.9% and about 80% by weight of aluminum oxide.
10. The method of claim 1 , wherein the contacting the aqueous stream with the sorption media is achieved by a flow-through continuous process.