Geochemical and electrical characterization of heavy metals in contaminated soils

Heliyon

Ahmed Melegy¹  Salwa Hassan²  Hussein Metwaly²  Mohamed M. Gomaa³ 

[1] Corresponding author.;Geological Department, National Research Centre, El-Behoos St., Dokki, Cairo, Egypt;Geophysical Sciences Department, Head of Geophysical Exploration Group, National Research Centre, El-Behoos St., Dokki, Cairo, Egypt;

关键词: Physical chemistry;    Geochemistry;    Geology;    Geophysics;    Earth sciences;    Hydrology;   

DOI  :  

来源: DOAJ

【 摘 要 】

The present work is conducted in the industrial district south of greater Cairo (ElTabbin area). Some heavy metals like Mn, Co, Ni, Cu, Zn, Pb, Cr, Ba, Cd, Mo were determined in polluted soils during May, 2018. At the study area, results displayed that average heavy metals concentrations differ considerably. They are decreased from Mn to Cd (Mn > Ba > Zn > Cr > Ni > Co > Pb > Cu > Mo > Cd). The average ranges as follows: Mn (255.8–31448.2 ppm); Ba (145.2–17545.6 ppm); Zn (53.3–1589.9 ppm); Cr (26.7–311.3 ppm); Ni (29.7–114.1 ppm); Co (13.2–39.8 ppm); Pb (5.7–77.4 ppm); Cu (7.6–35.2 ppm); Mo (0.1–15.9 ppm) and Cd (0–1.5 ppm), respectively. ElTabbin area has heavy manufacturing activity at Egypt. ElTabbin area was chosen as a model for that contamination.Electrical characteristics of some specimens from El- Tebbin area, Egypt, were taken and measured electrically at frequency range (10−3 to 100 kHz). Major and heavy elements were measured at specimens. Specimens were classified to three categories according to electrical properties. The changes were the consequence of change in minor and major mineral composition in the specimens. Electrical properties were able to recognize different specimens according to different levels of contaminants in the specimens. Texture, tortuosity and minor elements of heavy elements are the controlling factors that control electrical properties at specimens. High values concentration of Mn, Ni, and Zn heavy elements increases conductivity while the high concentration of Pb and Cu heavy elements decreases the conductivity. The mixing up of these different minor and major minerals and elements at specimen may lead to the change of conductivity values. The main controlling factors of the major elements are the Fe2O3 and SiO2, while the main controlling factors of the minor elements are the Mn and Pb. Our main objective is to study mixing up of the different minor and major minerals and elements on electrical properties of rocks.

【 授权许可】

Unknown