Heavy metals removal from automobile shredder residues (ASR)

Automotive shredder residue (ASR): Reviewing its production from end-of-life vehicles (ELVs) and its recycling, energy or chemicals’ valorisation

“…ASR typically contains significant amounts of Cl, S and heavy metals as illustrated in Table 4. The particle size ranges from less than 125 m up to approximately 10 cm [17,24,[32][33][34][35]. The calorific value ranges from 14 to 30 MJ/kg and the ash content from 18% to 68%.…”

“…Certain heavy metals can easily be removed by mechanical separation [29,34]. Granata et al [29] found that the ASR fraction smaller than 0.5 mm contained the highest Cr, Ni, Pb and Zn concentrations: removing this fraction can reduce the overall concentration of these elements in the ASR by more than 77%.…”

“…Granata et al [29] found that the ASR fraction smaller than 0.5 mm contained the highest Cr, Ni, Pb and Zn concentrations: removing this fraction can reduce the overall concentration of these elements in the ASR by more than 77%. Kurose et al [34] demonstrated that Cr, Cd and Pb concentrations in ASR could be reduced by at least 83% by eddy current separation of non-ferrous metals.…”

“…Further heavy metal removal can be obtained by washing ASR with an acid extraction agent [29,33,34]. Depending on the way heavy metals are bound to the matrix, different extraction agents, such as CH 3 COOH, KCl/HCl, NH 4 OH/HCl or H 2 O 2 /CH 3 COONH 4 , give the best results.…”

Pretreatment of automobile shredder residue (ASR) for fuel utilization

“…More than 30 million ELVs are generated each year in the USA, the EU, and Japan (Staudinger and Keoleian, 2001;Péra et al, 2004;Kurose et al, 2006). At present, ELVs are dismantled and valuable parts are preferentially recovered.…”