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Leaching for recovery of copper from municipal solid waste incineration fly ash: Influence of ash properties and metal speciation.

Henric Lassesson (Institutionen för kemi- och bioteknik, Industriell materialåtervinning) ; Karin Karlfeldt Fedje (Institutionen för bygg- och miljöteknik, Vatten Miljö Teknik) ; Britt-Marie Steenari (Institutionen för kemi- och bioteknik, Industriell materialåtervinning)
Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA (1399-3070). Vol. 32 (2014), 8, p. 755-762.
[Artikel, refereegranskad vetenskaplig]

Recovery of metals occurring in significant amounts in municipal solid waste incineration fly ash, such as copper, could offer several advantages: a decreased amount of potentially mobile metal compounds going to landfill, saving of natural resources and a monetary value. A combination of leaching and solvent extraction may constitute a feasible recovery path for metals from municipal solid waste incineration fly ash. However, it has been shown that the initial dissolution and leaching is a limiting step in such a recovery process. The work described in this article was focused on elucidating physical and chemical differences between two ash samples with the aim of explaining the differences in copper release from these samples in two leaching methods. The results showed that the chemical speciation is an important factor affecting the release of copper. The occurrence of copper as phosphate or silicate will hinder leaching, while sulphate and chloride will facilitate leaching.

Nyckelord: municipal solid waste incineration fly ash, copper speciation, X-ray absorption spectroscopy, ash properties, metal recovery, leaching



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Denna post skapades 2014-08-15. Senast ändrad 2015-03-30.
CPL Pubid: 201451

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Industriell materialåtervinning (2007-2014)
Institutionen för bygg- och miljöteknik, Vatten Miljö Teknik

Ämnesområden

Energi
Materialvetenskap
Hållbar utveckling
Oorganisk kemi

Chalmers infrastruktur