Chapter14 - Mineral Resources 14 Palo Alto and Urban Gold,...

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Unformatted text preview: Mineral Resources 14 Palo Alto and Urban Gold, Silver Large photographic and electronics industries used gold and silver for processes These metals ended up in their waste due to leaks and ended up in sewage sludge Each metric ton of ash contained 1 ounce of gold and 20 ounces of silver. In the early 1990s Palo Alto began waste water treatment to recover the gold and silver Minerals and Human use There are many minerals used by humans everydaywe sometimes take these for granted Dishes we eat from..telephone used for conversation are just a few examples Processed mineral value is about 5% of the US GDP Reclaimed minerals account for of these Easy to find minerals have been exploited, so, careful conservation and recycling are the best method to preserve these resources Resources and Reserves Mineral resources are elements, compounds, minerals or rocks concentrated in a form that can be extracted to obtain a useful commodity [potentially extractable at a profit] A reserve is that portion of a resource that is identified and is currently available to be legally extracted at a profit Availability and Use...
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Chapter14 - Mineral Resources 14 Palo Alto and Urban Gold,...

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