Instrumental neutron activation analysis of soil and sediment samples from Siwa Oasis, Egypt

Abstract

Instrumental neutron activation analysis was used to study geochemical peculiarities of the Siwa Oasis in the Western Egyptian Desert. A total of 34 elements were determined in soil and sediment samples

Geochemical Assessment of the Quaternary Soil in Siwa Oasis, Western Desert, Egypt

“…The Siwa depression is about 82 km long, 21 km wide with a total area of about 1000 km2. It lies at about 18 m below the sea level being completely surrounded by the Sahara Desert (Badawy et al, 2015).The climate of Siwaexhibits extreme aridity from April to November and very lowrainfall from December to March (10 mm/yr on average), andits population increased from about 8,000 residents in 1980 to 28,000 residents in 2016. (Gindy and El-Askary, 1969).…”

“…The Quaternary soils in Siwa Oasis were subjected to a fewpedogenetic,textural and mineralogical studies by earlier workers (e.g. Saleh, 1970;Harga et al, 1975;Aziz and Fanous, 1979;Abdou et al,1980 and1981;El-Khoriby and Issa, 1998;Omran, 2002;Bahanasawy, 2006).The geochemistry of Siwa Oasis soils received attention of recent workers dealing only with soil salinity and degradation (Ismail et al, 2006;Azzam and Salem, 2007;Aly, 2014;Badawy et al, 2015;Elnaggar et al, 2016;Rashed, 2016a and2016b;Rafie, 2017).…”

Neutron Activation Analysis to Probe the Air Pollution Using Plant Biomonitoring in Egypt

“…In the case of long-lived isotopes, the samples in aluminum caps were irradiated for approximately 3 days in the Cd screened channel 1 with a neutron flux of 1.8×10 11 n/cm 2 •s. The samples were repacked and measured first after 3 days of decay for 30 min and then after 20 days of decay for 1.5 h [9], [11], [12]. Genie2000 software was used to store, display, and analyze the gamma spectra.…”

Detection of zones of soil contamination with contrast-in-resistivity ecotoxicants by profiling

“…The development of methods for monitoring the environment is one of the promising fields in science [4][5][6], which will make it possible to more quickly and accurately determine the degree and location of pollution, which has a positive effect on the state of the environment. Direct methods are used for soil monitoring, which involve the extraction of soil samples and their study in laboratory conditions, which is a laborious process [7][8]. In this situation, the development of indirect contactless and not requiring well logging methods of monitoring, such as geophysical methods [9][10], which make it possible to quickly detect the contamination zone by electrical sounding and resistivity profiling, is relevant.…”