Metal recovery from high-grade WEEE: A life cycle assessment

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Metal recovery from high-grade WEEE : A life cycle assessment. / Bigum, Marianne; Brogaard, Line Kai-Sørensen; Christensen, Thomas Højlund.

In: Journal of Hazardous Materials, Vol. 207-208, 2012, p. 8-14.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Author

Bigum, Marianne; Brogaard, Line Kai-Sørensen; Christensen, Thomas Højlund / Metal recovery from high-grade WEEE : A life cycle assessment.

In: Journal of Hazardous Materials, Vol. 207-208, 2012, p. 8-14.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Bibtex

@article{3e002b0a2e5846ccbef87d497b59e325,
title = "Metal recovery from high-grade WEEE: A life cycle assessment",
publisher = "Elsevier BV",
author = "Marianne Bigum and Brogaard, {Line Kai-Sørensen} and Christensen, {Thomas Højlund}",
year = "2012",
doi = "10.1016/j.jhazmat.2011.10.001",
volume = "207-208",
pages = "8--14",
journal = "Journal of Hazardous Materials",
issn = "0304-3894",

}

RIS

TY - JOUR

T1 - Metal recovery from high-grade WEEE

T2 - A life cycle assessment

A1 - Bigum,Marianne

A1 - Brogaard,Line Kai-Sørensen

A1 - Christensen,Thomas Højlund

AU - Bigum,Marianne

AU - Brogaard,Line Kai-Sørensen

AU - Christensen,Thomas Højlund

PB - Elsevier BV

PY - 2012

Y1 - 2012

N2 - Based on available data in the literature the recovery of aluminium, copper, gold, iron, nickel, palladium and silver from high-grade WEEE was modeled by LCA. The pre-treatment of WEEE included manual sorting, shredding, magnetic sorting, Eddy-current sorting, air classification and optical sorting. The modeled metallurgical treatment facility included a Kaldo plant, a converter aisle, an anode refinery and a precious metal refinery. The metallurgic treatment showed significant environmental savings when credited the environmental load from avoided production of the same amount of metals by mining and refining of ore. The resource recovery per tonne of high-grade WEEE ranged from 2 g of palladium to 386 kg of iron. Quantified in terms of person-equivalents the recovery of palladium, gold, silver, nickel and copper constituted the major environmental benefit of the recovery of metals from WEEE. These benefits are most likely underestimated in the model, since we did not find adequate data to include all the burdens from mining and refining of ore; burdens that are avoided when metals are recovered from WEEE. The processes connected to the pre-treatment of WEEE were found to have little environmental effect compared to the metallurgical treatment. However only 12-26% of silver, gold and palladium are recovered during pre-treatment, which suggest that the reduction of the apparent losses of precious metals as palladium, gold and silver during pre-treatment of WEEE is of environmental importance. Our results support in a quantitative manner that metal recovery from WEEE should be quantified with respect to the individual metals recovered and not as a bulk metal recovery rate.

AB - Based on available data in the literature the recovery of aluminium, copper, gold, iron, nickel, palladium and silver from high-grade WEEE was modeled by LCA. The pre-treatment of WEEE included manual sorting, shredding, magnetic sorting, Eddy-current sorting, air classification and optical sorting. The modeled metallurgical treatment facility included a Kaldo plant, a converter aisle, an anode refinery and a precious metal refinery. The metallurgic treatment showed significant environmental savings when credited the environmental load from avoided production of the same amount of metals by mining and refining of ore. The resource recovery per tonne of high-grade WEEE ranged from 2 g of palladium to 386 kg of iron. Quantified in terms of person-equivalents the recovery of palladium, gold, silver, nickel and copper constituted the major environmental benefit of the recovery of metals from WEEE. These benefits are most likely underestimated in the model, since we did not find adequate data to include all the burdens from mining and refining of ore; burdens that are avoided when metals are recovered from WEEE. The processes connected to the pre-treatment of WEEE were found to have little environmental effect compared to the metallurgical treatment. However only 12-26% of silver, gold and palladium are recovered during pre-treatment, which suggest that the reduction of the apparent losses of precious metals as palladium, gold and silver during pre-treatment of WEEE is of environmental importance. Our results support in a quantitative manner that metal recovery from WEEE should be quantified with respect to the individual metals recovered and not as a bulk metal recovery rate.

U2 - 10.1016/j.jhazmat.2011.10.001

DO - 10.1016/j.jhazmat.2011.10.001

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

SN - 0304-3894

VL - 207-208

SP - 8

EP - 14

ER -