Both and arsenic were readily mobilized under the anaerobic, reducing conditions. During the early stages of operation, most arsenic and 80% and 65%, respectively was associated with suspended particulate matter, and was lost proportionately faster than arsenic
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Bacteria. Seven strains of -oxidizing heterotrophic bacteria were used in the experiments. Three strains strains T-21, T-23, and T-24 were isolated either directly or indirectly via enrichment cultures from AMD from inside an abandoned pyrite mine Cae Coch in the Conwy Valley, North Wales strain T-25 was isolated from an AMD stream at the derelict Parys mine site in
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Preventing Contamination of Catalysts and Metal ion is of interest to a variety of industries. Aggressive solutions, such as acids or bleach, can cause a significant number of metal ions to dissolve into the liquid
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Sulfidation can enhance both the reactivity and selectivity i.e., electron efficiency, εe of zero-valent ZVI in contaminant removal, which may make this cost-effective for a wider range of water treatment applications. However, current sulfidation methods involve either hazardous or unstable sulfidation agents e.g., Na2S, Na2S2O3, and Na2S2O4 or energy-intensive
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novel leaching reagents and leaching technology, such as oxalic acid, have been used to reduce the iron leaching at its source, achieving a highly selective leaching of vanadium over iron
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in Indonesia to process nickel saprolite to become Ferro Nickel, Nickel Pig , Nickel Matte. This study is aimed to assess the potential implementation of High-Pressure Acid HPAL. HPAL is a proven but not utilized in Indonesia due to the high investment, and it requires a large media for waste disposal
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is a low-cost technology used in industrial mining to recover precious metals such as gold and uranium, along with several other highly sought after metals like copper, fr om their
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US2916357A US694933A US69493357A US2916357A US 2916357 A US2916357 A US 2916357A US 694933 A US694933 A US 694933A US 69493357 A US69493357 A US 69493357A US 2916357 A US2916357 A US 2916357A Authority US United States Prior art keywords solution parts nitric acid dissolved Prior art date 1957-11-07 Legal status The legal status is an assumption and is not a legal
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Abstract. Iron oxide in samples of clay containing 8.15% iron oxide was leached in aqueous oxalic acid and hydrochloric acid solutions. Leaching experiments were conducted in the temperature range of 40–80°C for times up to 90 minutes in 0.2 M to 2 M acid solutions. The mixed kinetic mechanism seemed to be the most appropriate model to fit the kinetic data of leaching in oxalic acid while product layer
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· Heap HL is a flexible and constantly developing mineral processing and extraction that is gaining popularity and recognition for existing miners and developers
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