Removal and Recovery of Metal Cyanides from Industrial Effluents.

Patil YB and Paknikar KM (1999) Removal and recovery of metal cyanides from industrial effluents. Process Metallurgy 9: 707-716 (Elsevier Science, Scopus; ISSN: 1572-4409)

Posted: 16 Nov 2014

See all articles by Yogesh Patil

Yogesh Patil

Symbiosis International (Deemed University), Pune, India

K. Paknikar

Independent

Date Written: November 15, 2014

Abstract

Biosorption of metal-cyanide complexes viz. tetracyanocuprate(II) {[Cu(CN)4]-2} (TCC) and tetracyanonickelate(II) {[Ni(CN)4]-2} (TCN) from solutions was studied using different fungal biosorbents. Optimum sorption of TCC and TCN by the biosorbents tested occurred at pH 4.0. Among the cultures used, Cladosporium cladosporioides showed maximum loading capacity (40 μmol/g and 34 μmol/g for TCC and TCN, respectively) which was higher than activated charcoal. Further studies on C. cladosporioides showed that rate of uptake of TCC and TCN was miximum in the first 15 min (>50%), though equilibration of the system was achieved in 30 min. Uptake of both the metal-cyanide complexes was found to increase linearly as a function of initial metal-cyanide concentration up to 1.75 mM. The data could be fitted to Langmuir and Freundlich models for adsorption processes. Adsorbed TCC and TCN could be desorbed using 1 M NaOH with more than 95% efficiency. Concentrations achieved in the eluant were 38 (TCC) and 32 (TCN) fold of the original, respectively. The traces of metal-cyanide complexes remaining in solution after biosorption were completely biodegraded by a bacterial consortium in 5-6 h. The treated solution fully conformed to the disposal standards prescribed by statutory agencies

Suggested Citation

Patil, Yogesh and Paknikar, K., Removal and Recovery of Metal Cyanides from Industrial Effluents. (November 15, 2014). Patil YB and Paknikar KM (1999) Removal and recovery of metal cyanides from industrial effluents. Process Metallurgy 9: 707-716 (Elsevier Science, Scopus; ISSN: 1572-4409). Available at SSRN: https://ssrn.com/abstract=2524811

Yogesh Patil (Contact Author)

Symbiosis International (Deemed University), Pune, India ( email )

Lavale (Hill top)
Gram: Lavale, Tal: Mulshi, Dist: Pune
Pune, Maharashtra 412115
India

HOME PAGE: http://https://siu.edu.in/research.php

K. Paknikar

Independent

No Address Available

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