000			03891nam a2200301Ia 4500
005			20250223033112.0
008			231030s9999 xx 000 0 und d
049			_aDeposit
082			_a550
097			_aPh.D
099			_aCai01.12.15.Ph.D.2021.Al.I
100			_aAlshymaa Mohammad Guda Mansour ,
245			_aImplementation of magnetism and geochemistry tools on the environmental pollution assessment of the Abu Zaabal Area, South-East Delta, Egypt / _cAlshymaa Mohammad Guda Mansour ; Abd El Mohsen Zico , Ibrahim Elhemaly, Esmat Abd Elaal
246			_aاستخدام وسائل المغناطيسية والجيوكيمياء لتقييم التلوث البيئي بمنطقة أبو زعبل – جنوب شرق الدلتا - مصر
260			_c2021.
502			_aThesis (Ph.D.)-Cairo University - Faculty of Sciences - Department of Geology
504			_aBibliography: p. 133-149.
520			_aThe suitability of magnetic parameters as a pre-liminary tool for anthropogenic heavy metals’ (HMs) pollution assessment is proved and supported by many published studies. However, the extent to which this method is effective in an area of complex setting and the way that magnetic signals will be affected are still not well-known. This study aims for HMs pollution assessment in Abu Zaabal area and its vicinities, to understand how the natural geogenic input and interfering land-use affect the magnetic signals, and the viability of magnetic proxy tool to detect and assess HMs pollution in such complex areas. The study area is located south-east Nile Delta that was partly flooded before the High Dam construction where agricultural, residential (urbanized and reclaimed lands), and various industrial activities are interfering. It is one of the most polluted areas in the Nile Delta. Its location encouraged a spatial grain size gradation, which was supported by grain size analysis, from fine (silt and clay) in the north and west to coarser sand in the east and south. Field work (in-situ magnetic measurements and sampling), land-use mapping, grain size analysis, magnetic measurements and other calculated parameters (χ, χfd%, κT, XARM, and S-ratio), magnetic and geochemical mapping, risk assessment indices calculations (CF, EF, Igeo, and PLI), and statistical analysis were conducted to achieve this purpose. A total of 72 surface soil samples were collected to represent the different soil types and land-uses. In addition, 18 sites were selected for core and/or subsurface sampling. On the other hand, both in-situ bulk magnetic susceptibility (κ), measured at 170 sites, and mass specific susceptibilities (χ) show a distribution that corresponds to lithology where they were high in silty and clayey soil in the north and west and low in the other sandy parts. However, strong signals are recorded in sandy areas in the middle, and SE around the main industrial sites; the old steel factory, lead factory, and Akrasha area. Besides, the vertical profiles of χ along with frequency dependent susceptibility (χfd%) in these areas show the ideal distribution of industrial fly-ash. The thermomagnetic runs (κT) revealed that magnetite and titanomagnetite are the dominating magnetic phases that controls the magnetic signal in most of samples. The S ratio-300mT with mean value 0.92 (surface soil samples), indicates a substantial portion of hematite or goethite while S ratio-100mT with mean value of 0.72 indicates that not all the present magnetite is soft (MD)but it is of mixed origin of anthropogenic and natural sources.
650			_aGeology
653			_aMagnetism
700			_aRobert Schogler
856			_uhttp://172.23.153.220/th.pdf
905			_aMohamady
942			_cTH _2ddc
999			_c163910 _d163910
336			_2rda content _atext
337			_2rdamedia _aUnmediated
338			_2rdacarrier _avolume