Paper Title:
Thermodynamic Modelling of Phosphate and Chloride Effects on Solid and Solution Phase Ferric Iron Speciation
  Abstract

The purpose of this study was to model, based on thermodynamic equilibrium constants, the effects of chloride and phosphate ion on the speciation of ferric iron in solution and on Fe(III)-precipitates. The thermodynamic modelling was based on the geochemical modelling code PHREEQC and the thermodynamic database WATEQ4F. Increasing phosphate levels (g per L range) increase the complexation of ferric ion with phosphate (FeH2PO42+) with a parallel decrease in ferric sulphate complex (FeSO4+) and release of sulphate as SO42- in solution. Chloride ion at comparable levels and under otherwise similar conditions had negligible effects on the speciation of soluble iron species. In the solid phase analysis, jarosite and goethite species declined with increasing phosphate levels, whereas chloride did not affect the relative proportions of secondary Fe(III) minerals in the solid phase. Saturation index values for jarosites and goethite were dependent on the temperature with the range of phosphate levels (0–20 g/L) examine in this study.

  Info
Periodical
Advanced Materials Research (Volumes 71-73)
Edited by
Edgardo R. Donati, Marisa R. Viera, Eduardo L. Tavani, María A. Giaveno, Teresa L. Lavalle, Patricia A. Chiacchiarini
Pages
445-448
DOI
10.4028/www.scientific.net/AMR.71-73.445
Citation
O. H. Tuovinen, P. Nurmi, L. Ahonen, "Thermodynamic Modelling of Phosphate and Chloride Effects on Solid and Solution Phase Ferric Iron Speciation", Advanced Materials Research, Vols. 71-73, pp. 445-448, 2009
Online since
May 2009
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Mei Lin Liu, Ren Man Ruan, Jian Kang Wen, Dian Zuo Wang
Abstract:In this study, the viscosities and conductivities of bioleaching solution were determined by Ubbelohde viscometer and conductivity meter,...
149
Authors: Cecilia S. Demergasso
Abstract:The paper “Bacterial succession in bioheap leaching” [1] initiated the search for methods to analyze the microbial dynamics in bioleaching...
21
Authors: James A. Brierley, M.C. Kuhn
Abstract:The importance of comprehensive laboratory evaluation for development of an ore body to commercial processing using biohydrometallurgy cannot...
311
Authors: Pauliina Nurmi, Lasse Ahonen, Olli H. Tuovinen
Abstract:In this study the effects of pH and temperature on iron solubility were predicted using the geochemical modelling code PHREEQC and the...
441
Authors: Jin Liu, Dong Wei Li, Shao Jian Zhang, Dou Li, Lin Yu
Sustainable Materials and Applications
Abstract:The bioleaching effect of different concentrations of silver ion catalysis on chalcopyrite tailings has been investigated in shaking flasks....
635