QE520 : Investigation the concentration and pollution level of potentially toxic elements in soils and native plants in Foromad mining area (Western Sabzevar)
Thesis > Central Library of Shahrood University > Geosciences > MSc > 2022
Authors:
[Author], Afshin Qishlaqi[Supervisor]
Abstarct: Heavy mextal pollution, especially in mining areas, is one of the most important challenges of environmental problems. The Foromad mining area in the west of Sabzevar district is susceptible to the presence of various heavy mextals due to the presence of chromite mines and numerous mining operations, and there is a possibility of contamination of soil and plants with these mextals. The present research was conducted with the aim of determining the concentration of mextals and semi-mextals such as arsenic, chromium, nickel, copper, zinc and lead in the soils and plants around the mining area of Foromad. For this purpose, 15 surface soil samples and 5 plant samples were randomly taken from the target area. The concentration of potentially toxic mextals was determined using the ICP-MS method. The average concentration of arsenic, chromium, nickel, copper, zinc and lead was 9.93 ppm, 1182.5 ppm, 697.7 ppm, 38.13 ppm, 60.7 ppm and 6.56 ppm, respectively. The maximum concentration of chromium and nickel was observed in the mining area and near the waste piles. Also, baxsed on the calculated geochemical indices of Earth Accumulation Coefficient (Igeo), Single Factor Pollution Index (Pi) and Pollution Load Index (PLI), the soils of Foromad mining area show very severe pollution in terms of chromium and nickel. The results obtained from the comparison of the average concentration of heavy mextals in plant samples with their toxic range showed that chromium is in the safe range (near the lower limit of the toxic range), arsenic and lead mextals are in the normal range, copper and zinc in The toxic range and finally the nickel mextal with an average of 138 ppm is beyond the toxic range. Finally, baxsed on the biochemical coefficients (bioconcentration and transfer coefficients), the plain Artemisia plant was introduced as a suitable species for cleaning nickel-contaminated soils.
Keywords:
#key words: Soil pollution #Heavy mextals #Native Plants #Foromad #Sabzevar. Keeping place: Central Library of Shahrood University
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