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industry and the private household sector. Therefore it is particularly sustainable to return these expensive residues to the use-cycle of precious metals by
reclaiming the contained pure metals such as gold, silver, platinum, palladium and rhodium (<xr id="fig:Precious_metals_in_various_forms"/><!--(Fig. 11.1)-->).
Precious metal recycling is nowadays closely related to the protection of the environment. It is integrated into a complex network of processes that benefit the clean supply of water and protection of the air quality. The wastewater streams generated during refining processes are treated by special processes which remove hazardous components. High efficiency wet scrubbing and filtration of exhaust air is employed in all stages of the metal recycling processes.
<figure id="fig:Precious_metals_in_various_forms">
[[File:Precious metals in various forms.jpg|rightleft|thumb|Figure 1: Precious metals in various forms]]
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==<!--11.2-->Refining Methods==
The precious metal containing products and materials submitted into the refining process are generally called precious metal scrap (<xr id="fig:Examples_of_precious_metal_scrap"/><!--(Fig. 11.2)-->). They are usually classified into three categories which differ by the refining processes employed and by the cost-to-value ratio.
<figure id="fig:Examples_of_precious_metal_scrap">
[[File:Examples of precious metal scrap.jpg|left|thumb|Figure 2: Examples of precious metal scrap]]
</figure>
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Main Articel: [[Refining Methods| Refining Methods]]
==<!--11.3-->Recommendations for Scrap Handling==
