mostafa.redwan

Mostafa GamalEldeen Taha Redwan

Professor - Professor of Environmental Geochemistry at Sohag Faculty of Science-Geology Department

Faculty of science

Address: Sohag Faculty of Science, Geology dep., P.O. Box 82524, Sohag, Egypt

7

Like
5 3 13 27 3 6 770 203
110

Newly Added
  • Courses 5
  • Course Supplements 3
  • Courses Tasks 13
  • Publications 27
  • Office hours 3
  • Announcements 6
  • File uploaded 0
  • Downloaded Times 0

Influence of climate, mineralogy and mineral processing on hardpan formation in two, low-sulfide, high- carbonate, Gold mine tailings in the Eastern Desert of Egypt

2012 | Keywords Column experiments, Hardpan, Thickened deposition, Tailings, Gold mine,
Influence of climate, mineralogy and mineral processing on hardpan formation in two, low-sulfide, high- carbonate, Gold mine tailings in the Eastern Desert of Egypt
Despite its importance within environmental management strategies, little concern is shown to sulfide oxidation and/or hardpan formation at neutral pH where dry condition prevails. Two gold mine tailings in Egypt, El Sid and Barramiya, were studied for their geochemical/mineralogical properties, and climate influence on hardpan formation. The tailings are characterised by homogeneous silt-sized sediments (>42%), have high carbonate, predominantly as ... Read more

Application of Mineral Liberation Analysis in studying micro-sedimentological structures within sulfide mine tailings and their effect on hardpan formation

2012 | Keywords Geochemistry, Mineralogy Geochemistry, Hardpan layers, mine tailings, Davidschacht, MLA,
Application of Mineral Liberation Analysis in studying micro-sedimentological structures within sulfide mine tailings and their effect on hardpan formation
In this paper, mineral liberation analysis (MLA) was applied as a new approach to elucidate and quantify textural, mineralogical, and chemical variations on a μm/mm scale to understand the alteration processes relevant for hardpan formation at the Davidschacht mine tailings in Freiberg, Germany. Additionally, the bulk mineralogical, geochemical, and physical properties were investigated in detail. Within the upper 1.5m of ... Read more

Application of EDXRF handheld to optimize exploration strategies

2012 | Keywords Exploration, grain size fraction, Stream sediment, Heavy mineral concentrate, EDXRF handheld,
Application of EDXRF handheld to optimize exploration strategies
Stream sediment chemistry and heavy mineral concentrates (HMC) are basic tools for exploring ore deposits. Fast analytical results are needed to optimize exploration strategies. Using an energy dispersive X-ray fluorescence (EDXRF) handheld fixed on a stage, the analysis could be done in the field providing informative results to optimize the exploration strategy. We investigated in the laboratory the effect of ... Read more

Understanding micro-environment development in mine tailings using MLA and image analysis

2012 | Keywords mine tailings, lamination, micro environment, MLA, mineralogy,
Understanding micro-environment development in mine tailings using MLA and image analysis
In the course of ore mineral treatment large amounts of mineral residues will be deposited in tailings dams. The spilled material might contain some amount of valuable as well as hazardous material. The spilling process generates vertical and lateral mineral and grain size fractionation. Mine tailings therefore show distinct chemical and mineralogical pattern along the spilling path and across the ... Read more

Reactive transport modelling of weathering processes in intensely stratified mine tailings

2012 | Keywords weathering, Mineral Liberation Analysis, mine tailings, reactive transport modelling, cemented layers, metal retention, unsaturated zone,
Reactive transport modelling of weathering processes in intensely stratified mine tailings
Reactive transport simulations have been applied to investigate possible effects of stratification on the potential of sulfide-bearing mine tailings to form protective cemented layers and to retain toxic elements. Our research is based on a German tailings site, where material is intensely stratified on a mm-cm scale. The computational domain was defined as an one dimensional column the size of ... Read more

Application of MLA in reactive transport modeling of weathering processes in intensely stratified tailings

2011 | Keywords Reactive Transport Modeling, Contamination, Simulation, Mineral Liberation Analysis,
Application of MLA in reactive transport modeling of weathering processes in intensely stratified tailings
Reactive transport simulations have been applied to investigate possible effects of stratification on the potential of sulfide-bearing mine tailings to form protective cemented layers and to retain toxic elements. Our research is based on a German tailings site, which material is intensely stratified on a mm-cm scale. Multiple cemented layers have been observed in the oxidized part of the tailings, ... Read more

Simultaneous Monitoring of Water Saturation and Fluid Conductivity in Unconsolidated Sand Columns

2010 | Keywords
Simultaneous Monitoring of Water Saturation and Fluid Conductivity in Unconsolidated Sand Columns
Electrical conductivity can easily be measured, but interpretation is ambiguous since saturation, fluid conductivity, and material properties are interacting parameters. This study aims to indirectly obtain fluid conductivity evolution in time and space in column experiments by repetitively applying two independent non-destructive multi-level methods. Water saturation, is derived from the difference in x-ray attenuation by dry, partially and fully saturated ... Read more