Acid extraction of molybdenum, nickel and cobalt from mineral sludge generated by rainfall water at a metal recycling plant

This study investigated the leaching yields of Mo, Ni and Co from a mineral sludge of a metal recycling plant generated by rainfalls. The investigated mineral sludge had a complex heterogeneous composition, consisting of particles of settled soil combined with metal-bearing particles (produced by ca...

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Veröffentlicht in:Environmental technology. - 1998. - 37(2016), 5 vom: 29., Seite 630-9
1. Verfasser: Vemic, M (VerfasserIn)
Weitere Verfasser: Bordas, F, Guibaud, G, Comte, S, Joussein, E, Lens, P N L, Van Hullebusch, E D
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2016
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Mineral sludge chemical leaching leaching yields metals sulphuric acid Acids Cobalt 3G0H8C9362 mehr... Nickel 7OV03QG267 Molybdenum 81AH48963U
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520 |a This study investigated the leaching yields of Mo, Ni and Co from a mineral sludge of a metal recycling plant generated by rainfalls. The investigated mineral sludge had a complex heterogeneous composition, consisting of particles of settled soil combined with metal-bearing particles (produced by catalysts, metallic oxides and battery recycling). The leaching potential of different leaching reagents (stand-alone strong acids (HNO3 (68%), H2SO4 (98%) and HCl (36%)) and acid mixtures (aqua regia (nitric + hydrochloric (1:3)), nitric + sulphuric (1:1) and nitric + sulphuric + hydrochloric (2:1:1)) was investigated at changing operational parameters (solid-liquid (S/L) ratio, leaching time and temperature), in order to select the leaching reagent which achieves the highest metal leaching yields. Sulphuric acid (98% H2SO4) was found to be the leachant with the highest metal leaching potential. The optimal leaching conditions were a three-stage successive leaching at 80 °C with a leaching time of 2 h and S/L ratio of 0.25 g L(-1). Under these conditions, the achieved mineral sludge sample leaching yields were 85.5%, 40.5% and 93.8% for Mo, Ni and Co, respectively. The higher metal leaching potential of H2SO4 in comparison with the other strong acids/acid mixtures is attributed to the fact that H2SO4 is a diacidic compound, thus it has more H(+) ions, resulting in its stronger oxidizing power and corrosiveness 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Mineral sludge 
650 4 |a chemical leaching 
650 4 |a leaching yields 
650 4 |a metals 
650 4 |a sulphuric acid 
650 7 |a Acids  |2 NLM 
650 7 |a Cobalt  |2 NLM 
650 7 |a 3G0H8C9362  |2 NLM 
650 7 |a Nickel  |2 NLM 
650 7 |a 7OV03QG267  |2 NLM 
650 7 |a Molybdenum  |2 NLM 
650 7 |a 81AH48963U  |2 NLM 
700 1 |a Bordas, F  |e verfasserin  |4 aut 
700 1 |a Guibaud, G  |e verfasserin  |4 aut 
700 1 |a Comte, S  |e verfasserin  |4 aut 
700 1 |a Joussein, E  |e verfasserin  |4 aut 
700 1 |a Lens, P N L  |e verfasserin  |4 aut 
700 1 |a Van Hullebusch, E D  |e verfasserin  |4 aut 
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773 1 8 |g volume:37  |g year:2016  |g number:5  |g day:29  |g pages:630-9 
856 4 0 |u http://dx.doi.org/10.1080/09593330.2015.1075601  |3 Volltext 
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