BIOLEACHING OF LATERITIC NICKEL ORE BY ULTRASOUND

Authors
KAR RN SUKLA LB SWAMY KM PANCHANADIKAR VV NARAYANA KL
Citation
Rn. Kar et al., BIOLEACHING OF LATERITIC NICKEL ORE BY ULTRASOUND, Metallurgical and materials transactions. B, Process metallurgy and materials processing science, 27(3), 1996, pp. 351-354
Citations number
18
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Journal title
Metallurgical and materials transactions. B, Process metallurgy and materials processing science → ACNP
ISSN journal
10735615
Volume
27
Issue
3
Year of publication
1996
Pages
351 - 354
Database
ISI
SICI code
1073-5615(1996)27:3<351:BOLNOB>2.0.ZU;2-W
Abstract
The bioleaching of nickel from lateritic ore of Orissa, India, using a native Aspergillus niger strain was studied with and without ultrasou nd. Different parameters, such as spore concentration, amount of dextr ose in the medium, pulp densities, and sonication time, were studied f or maximizing the extraction of nickel. Enhanced recoveries and reduct ion in leaching time were demonstrated using ultrasound. The highest a mount of nickel, 95 pct, was extracted in 14 days with an inoculum siz e of 10(6) spore/mL and 2 pct dextrose in the medium under 30 minutes ultrasonic pretreatment using 43 KHz frequency at 1.5 W/cm(2) intensit y. It was also found that ultrasound assists in selective leaching of nickel over iron.