Extraction methods Flashcards
When is electrolysis used to extract metals
metals above carbon in reactivity series
When is heating carbon used to extract metals
metals below carbon
What are silver and gold found as
uncombined elements
What is the definition of an ore
rock contains enough compound to extract a metal for profit
What element are biological extractions mainly used for
copper
What are 2 biological ways to extract copper
-Bioleaching
-Phytoextraction
describe bioleaching
bacteria grow in low grade ore, produces leachate. then displace copper w scrap iron or electrolysis
describe phytoextraction
grow plants that absorb metal, burned, extract metal
What are advantages of bioleaching
no harmful gases, conserve higher grade ores, no high temps
What are disadvantages og bioleaching
very slow, toxic substances which damage enviornment
Advantages of phytoextraction
no harmful gases, conserve higher grade ores, can do in contaminated soils
Disadvantages of phytoextraction
expensive, depends on weeather
