Fluoride Toxicity in Bioleaching of Fluorapatite

Jarno Mäkinen; Päivi Kinnunen; Mona Arnold; Outi Priha; Tuija Sarlin

doi:10.4028/www.scientific.net/AMR.1130.406

Paper Titles

Influence of Biological and Environmental Factors on Leaching Efficiency during Chalcopyrite Bioleaching Process
p.387

Indium Extraction from Reiche Zeche Sphalerite and Community Analysis of Acidic Mine Water
p.392

Chalcopyrite Bioleaching at High Sulfate Concentrations
p.396

Enhanced Column Bioleaching of Copper Sulfides by Forced Aeration
p.400

Fluoride Toxicity in Bioleaching of Fluorapatite
p.406

Roles of Oligotrophic Acidophiles (Alicyclobacillus) in Chalcopyrite Bioleaching System: Shake Flask Evaluation
p.410

Bioleaching of Aluminum Slags with Thermophilic Bacteria
p.414

Bioleaching of Copper Sulphide Ore by a Microbial Consortium Isolated from Acid Mine Drainage: Influence of [Fe²⁺]
p.418

Bioleaching vs. Chloride Leaching: Real Advantages and Drawbacks for Primary Sulfides
p.423

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1130Fluoride Toxicity in Bioleaching of Fluorapatite

Fluoride Toxicity in Bioleaching of Fluorapatite

Abstract:

The use of biohydrometallurgical processes may be restricted by microbial inhibition due to inhibiting fluoride originating from the feed material. In this work, phosphorus bioleaching experiments on fluorapatite ore were conducted in a reactor using Fe-and S-oxidizing bacteria, resulting in 56 % leaching yield for P, despite abundant (800 mg l^-1) F in the pregnant leach solution. In further F toxicity experiments it was observed that aluminum had a significant role in decreasing the inhibition caused by F, by producing stable complexes with Al. The bioleached ore contained plenty of Al, explaining why bioleaching was not strongly inhibited.

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Periodical:

Advanced Materials Research (Volume 1130)

Pages:

406-409

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1130.406

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Online since:

November 2015

Authors:

Jarno Mäkinen, Päivi Kinnunen, Mona Arnold, Outi Priha, Tuija Sarlin

Keywords:

Bioleaching, Fluorapatite, Fluoride, Phosphorus, Toxicity

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