Which two methods are used to extract uranium?

Which two methods are used to extract uranium?

• A. Open-pit mining and sea-water extraction
• B. In situ leaching and solar evaporation
• C. Alluvial mining and heap leaching
• D. Conventional mining and in situ (similar to fracking)

Answer: (D)

The question is testing knowledge of the practical ways uranium is mined. Uranium is typically recovered either by conventional mining or by in-situ leaching. Conventional mining involves physically removing ore from the earth—either by open-pit or underground mining—and then processing the ore to extract uranium oxide. This method works well for ore deposits that are accessible and near the surface or in well-defined ore bodies. In-situ leaching, on the other hand, dissolves uranium while it remains in the ground. A leaching solution is injected into the ore zone through wells, the uranium is dissolved and carried back to the surface in a solution, where it is then recovered. This method minimizes surface disturbance and is especially suited to certain sandstone-type ore bodies. The other options are not the standard paired methods used for uranium extraction on a broad scale. Sea-water contains uranium at extremely low concentrations, making extraction impractical. Solar evaporation is not a primary extraction method for uranium in most contexts. Heap leaching and alluvial mining can occur in some setups, but the well-established combination used in practice is conventional mining plus in-situ leaching.

The question is testing knowledge of the practical ways uranium is mined. Uranium is typically recovered either by conventional mining or by in-situ leaching.

Conventional mining involves physically removing ore from the earth—either by open-pit or underground mining—and then processing the ore to extract uranium oxide. This method works well for ore deposits that are accessible and near the surface or in well-defined ore bodies.

In-situ leaching, on the other hand, dissolves uranium while it remains in the ground. A leaching solution is injected into the ore zone through wells, the uranium is dissolved and carried back to the surface in a solution, where it is then recovered. This method minimizes surface disturbance and is especially suited to certain sandstone-type ore bodies.

The other options are not the standard paired methods used for uranium extraction on a broad scale. Sea-water contains uranium at extremely low concentrations, making extraction impractical. Solar evaporation is not a primary extraction method for uranium in most contexts. Heap leaching and alluvial mining can occur in some setups, but the well-established combination used in practice is conventional mining plus in-situ leaching.