SYMPOSIA PAPER Published: 01 January 1984

Recovery of Chromium from Plating Wastes


Recovery of chromium from a plating sludge is discussed. The process consists of two parts: roasting the sludge with sodium carbonate (Na2CO3) and calcium oxide (CaO), followed by leaching. The optimal parameters for roasting are a temperature range of 950 to 1000°C and Na2CO3 and CaO contents of 2.4 and 2.8 mol per mole of chromium oxide (Cr2O3) respectively.

Demineralized water is recommended for the leaching of sodium chromate (Na2CrO4) from the agglomerate formed during roasting. The leached water is recycled through a strongly acidic cation exchanger followed by a weakly basic anion exchanger. A solution of chromate or chromic acid having a concentration up to 60 kg Cr/m3 is obtained.

Author Information

Bolto, BA
CSIRO Division of Chemical Technology, Victoria, Australia
Kotowski, M
Technical University of Lublin (Politechnika Lubelska), Lublin, Poland
Pawlowski, L
Technical University of Lublin (Politechnika Lubelska), Lublin, Poland
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: D34
Pages: 278–288
DOI: 10.1520/STP32707S
ISBN-EB: 978-0-8031-4916-8
ISBN-13: 978-0-8031-0405-1