Recovery of Cr(III) from Tannery Spent Chrome Liquor for Reuse

Khwaja, A. R.; Singh, R J; Tandon, S. N.

doi:10.1061/(asce)0733-9372(2000)126:4(307)

Cited by 5 publications

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the majority of extractants such as oximes, high molecular weight amines, and alkylphosphorus compounds such as mono(2-ethylhexyl)phosphoric acid, bis(2-ethylhexyl)phosphoric acid, and tri- n -octylphosphine oxide used for the extraction of these metal ions generally suffer from the drawback of poor selectivity and or extractant loss. Cyanex 301 [bis(2,4,4 trimethylpentyl)dithiophosphinic acid] has been reported for the recovery of Cr(III) and Ni(II) from some industrial wastes. Cyanex 301 is associated with a foul smell even in dilute solutions.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Chromium and Nickel from Industrial Waste

Gupta

Deep

Tandon

2002

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The paper embodies an analytical approach to the recovery of chromium and nickel from different kinds of industrial wastes, namely, a Cr(III)-Ni(II) plating sludge, a Ni(II) plating mug, and a tannery effluent. The proposed methods employ precipitation, solvent extraction, and electrowinning steps. A toluene solution of Cyanex 923 is used as an extractant for the separation of Cr(III) and Ni(II) from some commonly associated metal ions such as Al(III), Fe(III), Mn(II), Co(II), Cu(II), Zn(II), and Pb(II). The experiments conducted up to 10 cycles indicate a negligible loss in extraction efficiency. The electrodeposition of Cr(III) and Ni(II) offers average cathode efficiencies around 40 and 75%, respectively. The recovered metals are 99.9% pure. The proposed procedures will be helpful in saving the wastage of metals and protecting the environment from metal pollution.

show abstract

Section: Introductionmentioning

confidence: 99%