ALTERNATIVE METHODS OF EXTRACTING METALS

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Chemistry

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What do new methods of mining avoid
Avoids disadvantages of traditional mining methods of **digging, moving and disposing of large amounts of rock**
2
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What is phytomining
Plants are used to absorb metal compounds from the soil

Plants are harvested and burned to produce ash

Ash contains metal compounds
3
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What is bioleaching
Bacteria used to produce leachate solutions: contain metal compounds
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Advantages/disadvantages of these methods
**ADVANTAGE**

* require less energy than traditional methods
* work on low concentration ores

**DISADVANTAGE**

* slow to carry out