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

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Alteration parameters affecting the Luxor Avenue of the Sphinxes-Egypt

2018 | Keywords Avenue of the Sphinxes, Burial effects, Solar effects, Alteration,
Alteration parameters affecting the Luxor Avenue of the Sphinxes-Egypt
Stone alteration in the environment is caused by various extrinsic disintegration agents, besides, their intrinsic properties “mineralogical composition, textures and internal structure”. Therefore, the purpose of the current study was to evaluate the weathering state affecting the Luxor Avenue of the Sphinxes by studying its chemical, mineralogical and physio-mechanical characteristics, in addition to morphological features. Scientific techniques, such as X-ray ... Read more

Chemical characteristics and assessment of groundwater quality in Halayieb area, southeastern part of the Eastern Desert, Egypt

2018 | Keywords groundwater characterization, groundwater quality, Halayieb, Egypt, salinity, suitability,
Chemical characteristics and assessment of groundwater quality in Halayieb area, southeastern part of the Eastern Desert, Egypt
Halayieb area is located at the southeastern corner on the border between Egypt and Sudan. The area has very important strategic aspects to Egypt. Groundwater is the only source of fresh water in the area. The hydrogeochemical characterizations of groundwater in the area were carried out, to assess the quality of groundwater for its suitability for drinking and irrigation purposes. ... Read more

Flood hazard assessment and heavy metal distributions around Um Gheig mine area, Eastern Desert, Egypt

2017 | Keywords Pb-Zn-mine, Pollution, Contamination, Enrichment indices, Heavy metals, Um Gheig, Egypt,
Flood hazard assessment and heavy metal distributions around Um Gheig mine area, Eastern Desert, Egypt
This study focuses on wadi Um Gheig and its associated Pb-Zn mine to quantify the possible dispersion pathways of heavy metals to the surrounding environment. The morphometric drainage system parameters were specified by ArcGIS 9.3. A total of 21 samples were collected and analyzed using XRF, XRD, ICP-OES and SEM. Different enrichment indices were applied to specify the degree and ... Read more

Application of quantitative mineralogy on the neutralization potential calculations within µm-scale stratified mine tailings

2017 | Keywords Mining wastes, Acid rock drainage, Bulk neutralizing/acid potential, Mineralogical neutralizing/acid potentia, Reactive Transport Modeling,
Application of quantitative mineralogy on the neutralization potential calculations within µm-scale stratified mine tailings
Estimation of the long-term environmental impact of mining wastes is of socio-economic interest. Bulk analytical approaches of the neutralizing (NP) and acid potentials (AP) provide in general worst-case scenarios for acid rock drainage (ARD) predictions and long-term evaluation. Taking individual graded layers with variable reactive mineral ratios into consideration, alternating zones, highly contrasting in their neutralizing and acid potential, can ... Read more

Heavy metals seasonal variability and distribution in Lake Qaroun sediments, El-Fayoum, Egypt

2017 | Keywords Heavy metals, Sediments, Multivariate statistical analysis, Lake Qaroun, Egypt,
Heavy metals seasonal variability and distribution in Lake Qaroun sediments, El-Fayoum, Egypt
This study was carried out to investigate the seasonal variability and distribution of heavy metals “HMs” (Fe, Mn, Co, Cr, Cu, Ni, Pb, Zn and V) in the bottom sediments of Lake Qaroun, in Egypt. The samples were collected from 10 sites in summer and winter seasons in 2015. Total metals concentrations were measured using inductively coupled plasma spectrometer. Multivariate ... Read more

Effect of water–rock interaction processes on the hydrogeochemistry of groundwater west of Sohag area, Egypt

2016 | Keywords Hydrogeochemistry, Sohag Governorate, Quaternary aquifer, Water–rock interaction, Groundwater, Egypt,
Effect of water–rock interaction processes on the hydrogeochemistry of groundwater west of Sohag area, Egypt
Groundwater is used intensively for land reclamations and domestic purposes in new reclaimed areas west of the Nile Valley in Sohag Governorate, Upper Egypt as it is the only source of water in the area. Twenty-six groundwater samples are collected to evaluate the hydrochemical characteristics and the impact of water–rock interaction on the chem-istry of groundwater using classical geochemical and ... Read more

Factors controlling groundwater hydrogeochemistry in the area west of Tahta, Sohag, Upper Egypt

2016 | Keywords Groundwater chemistry, Ionic ratio, Factor analysis, Ion exchange, Upper Egypt,
Factors controlling groundwater hydrogeochemistry in the area west of Tahta, Sohag, Upper Egypt
Groundwater quality suffers from various degradation mechanisms such as extensive urbanization, agricultural and industrial activities in many developing countries. This study was carried out to identify the factors responsible for the change in the hydrogeochemistry of groundwater in the area west of Tahta, Sohag, Upper Egypt. The Piper diagrams show the predominance of Na–Cl (75%) with minor Ca–Na–HCO3 and Ca–Cl ... Read more

Seasonal variation and enrichment of metals in sediments of Rosetta branch, Nile River, Egypt

2016 | Keywords Heavy metals, Sediments, Geo-accumulation index, Pollution Load Index, Rosetta branch, Egypt,
Seasonal variation and enrichment of metals in sediments of Rosetta branch, Nile River, Egypt
This study investigated heavy metal pollution in sediments of the Rosetta branch of the River Nile of Egypt to quantify the toxic distribution potential of metals into the surrounding environment. Sediment samples were collected at 9 sites during in four seasons. Organic matter and total metal concentrations were determined using loss on ignition and inductively coupled plasma spectrometry, respectively. Principal ... Read more

Using Na/K ratios to identify the potential impacts of sewage effluents on the groundwater quality in Sohag area, the Nile Valley, Egypt

2016 | Keywords
Using Na/K ratios to identify the potential impacts of sewage effluents on the groundwater quality in Sohag area, the Nile Valley, Egypt
Improper disposal of wastewater is an important source of groundwater contamination, as it poses serious threats to the environment and human health. In this case study, 18 groundwater and 3 sewage effluent samples were collected from the area adjacent to a wastewater treatment plant in Sohag, Egypt. These samples were subjected to detailed chemical and bacteriological analyses to quantify the ... 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