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Originally, an urban mine is the stockpile of rare metals in the discarded waste electrical and electronic equipment (WEEE) of a society. [4] Urban mining is the process of recovering these rare metals through mechanical and chemical treatments. In 1997, recycled gold accounted for approximately 20% of the 2700 tons of gold supplied to the ...
The mining law of 1866 had given discoverers rights to stake mining claims to extract gold, silver, cinnabar (the principal ore of mercury) and copper. When Congress passed the General Mining Act of 1872, the wording was changed to "or other valuable deposits," giving greater scope to the law. The 1872 law was codified as 30 U.S.C. §§ 22-42 [14]
About 150 small-and-medium sized companies do urban mining, according to the Korea Urban Mining Association. At SungEel HiTech, the process is not complex or highly automated.
Waste (or wastes) are unwanted or unusable materials.Waste is any substance discarded after primary use, or is worthless, defective and of no use. A by-product, by contrast is a joint product of relatively minor economic value.
GTSO Develops Urban Mining Best Practices to Build Innovative Business Model SAN JOSE, Calif.--(BUSINESS WIRE)-- Green Technology Solutions (OTCBB: GTSO) CEO Paul Watson conducted the first of ...
Landfill mining and reclamation (LFMR) is a process which excavates and processes solid wastes which have previously been landfilled. [1] The process aims to reduce the amount of landfill mass encapsulated within the closed landfill and/or temporarily remove hazardous material to allow protective measures to be taken before the landfill mass is replaced.
In the UK some of these are sometimes termed advanced waste treatment technologies. Biodrying; Gasification. Plasma gasification: Gasification assisted by plasma torches ...
Waste exchange is where the waste product of one process becomes the raw materials for a second process. This is similar to using pre-consumer recycling material in a product. This represents a way of reducing waste disposal through reuse for that which cannot be eliminated.