Removal of mercury from an alumina refinery aqueous stream
| Autor: | Mark Mullett, Charles L. Dobbs, Suresh K. Bhargava, James Tardio |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Powdered activated carbon treatment
Environmental Engineering Sorbent Health Toxicology and Mutagenesis Inorganic chemistry chemistry.chemical_element Industrial Waste Waste Disposal Fluid Water Purification Ammonia chemistry.chemical_compound Adsorption medicine Aluminum Oxide Environmental Chemistry Waste Management and Disposal Aqueous solution Mercury Hydrogen-Ion Concentration Silicon Dioxide Pollution Sulfur Carbon Mercury (element) chemistry Metallurgy Water Pollutants Chemical Activated carbon medicine.drug Nuclear chemistry |
| Zdroj: | Journal of hazardous materials. 144(1-2) |
| ISSN: | 0304-3894 |
| Popis: | Digestion condensate is formed as a by-product of the alumina refinery digestion process. The solution exhibits a high pH and is chemically reducing, containing many volatile species such as water, volatile organics, ammonia, and mercury. Because digestion condensate is chemically unique, an innovative approach was required to investigate mercury removal. The mercury capacity and adsorption kinetics were investigated using a number of materials including gold, silver and sulphur impregnated silica and a silver impregnated carbon. The results were compared to commercial sorbents, including extruded and powdered virgin activated carbons and a sulphur impregnated mineral. Nano-gold supported on silica (88% removal under batch conditions and 95% removal under flow conditions) and powdered activated carbon (91% under batch conditions and 98% removal under flow conditions) were the most effective materials investigated. The silver and sulphur impregnated materials were unstable in digestion condensate under the test conditions used. |
| Databáze: | OpenAIRE |
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