Effect of Temperature on The Bioleaching of Iron from Silica Sand with AspergillusnigerCorrelated with Shrinking Core and Mixed Kinetic Models

Journal Title: Saudi Journal of Engineering and Technology - Year 2017, Vol 2, Issue 5

Abstract

Abstract: The influence of temperature on the bioleaching of iron from silica sand with Aspergillusniger has been studied with three size fractions of silica sand: +120-212µm, +212-300µm, and +300-425µm over the temperature range 40 to 800C for several hours. The experimental data were fitted to the shrinking core model (ash layer diffusion control and chemical reaction control) and a mixed kinetic model that incorporates a multiplying factor, b. Optimal temperature for bioleaching was found to be 700C and the amount of iron leached increased with decreasing particle size, with +120-212µm being the most effective particle size fraction. The shrinking core model with chemical reaction control and ash layer diffusion control failed to explain the effect of temperature on the kinetics of bioleaching. The mixed kinetic model with the multiplying factor b=0.2 gave a perfect fit to the experimental data after the second hour of bioleaching. At the early part of the bioleaching process where the mixed kinetic model failed, ash layer diffusion seemed to be in control. Based on our work, a staged bioreactor design that relies on the ash layer and mixed kinetics models may be required for the process. Keywords: Silica sand, Aspergillusniger, Bioleaching, Iron, Shrinking core, Mixed Kinetics, Model, Temperature.

Authors and Affiliations

O. C. N. Ndukwe

Keywords

Related Articles

Regional Medical Platform Based on Middleware

Abstract: In order to realize the sharing of medical data and solve the current situation of excessive medical treatment and waste of resources between patients and medical institutions, medical information interface eng...

Sustainability of Groundwater for Domestic Uses in Rural Communities of Kogi State, Nigeria

Abstract:Groundwater is a natural resource that is of immense importance to life and its characteristics are greatly determined by the properties of the immediate geologic formations. Generally, the development of ground...

A Smart Traffic Management System for Congestion Control and Warnings Using Internet of Things (IoT)

Abstract: Over the years, there has been a sudden increase in the number of vehicles on road. Traffic congestion, is a growing problem everyone faces in their daily life. Manual control of traffic by policeman has not pr...

Inhibitory Potentials of Bamboosa vulgaris Leaves Extract on Corrosion Inhibition of Mild Steel in 1M HCl Solution

Abstract: The corrosion inhibitory potentials of Bamboosa vulgaris leaves extract in 1M HCl solution was studied using gravimetric and gasometric techniques. The results obtained from both gasometrical and gravimetric an...

How to Improve the New Product Development

Abstract: In order to compete in the dynamic business environment, it is has become extremely essential for the businesses and industries to enhance their performance. To achieve this new product development is considere...

Download PDF file
  • EP ID EP401716
  • DOI -
  • Views 120
  • Downloads 0

How To Cite

O. C. N. Ndukwe (2017). Effect of Temperature on The Bioleaching of Iron from Silica Sand with AspergillusnigerCorrelated with Shrinking Core and Mixed Kinetic Models. Saudi Journal of Engineering and Technology, 2(5), 197-204. https://europub.co.uk/articles/-A-401716