Alternative methods of extracting metals
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13 Terms
what are some uses of copper?
electronic equipment
what is done to begin the process of phytomining?
Hyperaccumulator plants are grown on land containing a metal compound
what do these plants do with the metal in the soil?
they absorb it and concentrate it in their tissue
what is done with the plants?
they are harvested and burned
what is contained in the ash?
a high concentration of the metal compound
what is used in bioleaching?
bacteria
what is done with the bacteria?
it is mixed with the ore
what do the bacteria then do?
they carry out chemical reactions and produce a solution called leachate
what does the leachate contain?
the metal compound
how can we extract the copper from the copper compounds?
using (usually scrap) iron, as it is more reactive than copper and will displace it
using electrolysis
both phytomining and bioleaching allow us to _____ extract metals from low grade ores
economically
why is this important?
metals on Earth are a finite resource
what is one advantage over traditional mining?
it doesn’t involve digging, transporting and disposing of large amounts of rock
