Rare earth elements in surface soils of the Davarzan area, NE of Iran

Mazhari, Seyed Ali; Attar, R. Sharifiyan

doi:10.1016/j.geodrs.2015.03.001

Cited by 15 publications

(2 citation statements)

References 29 publications

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“…The REE could be an appropriate indicator to define pedogenetic processes, weathering condition and source identification of soils [12,25]. The REE composition of SR surface soils is significantly dependent on parent materials [28,31]. So, the investigation of sewage irrigation on REE content could be helpful to determine soil geochemical variations in this area.…”

Section: Soils Geochemical Compositionmentioning

confidence: 99%

Geochemical and environmental investigation of sewage-irrigated soils and crops of Sabzevar, NE of Iran

2019

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The present study identifies the effects of sewage irrigation on the surface soils geochemistry and the concentration of heavy metals in plants of Sabzevar area, which were irrigated for a long time by wastewater. This study shows that the sewage irrigation has led to decreasing pH and increasing organic matter, and also it makes the accumulation of P 2 O 5 , high-field-strength elements (Ga, Ta, Th, U and Y) and heavy metals (Cd, Co, Cu, Pb, Sn and Zn) in contaminated soils. Likewise, the concentration of rare-earth elements (REE) in contaminated soils is more than background samples with moderate enrichment of light REE compared with high REE in REE pattern diagram (mean La N /Lu N = 5.77). The calculated transfer factor and enrichment factor indexes in plants grown on the polluted soils are significantly higher than the control samples which show the heavy metal enrichment in the contaminated samples. Although the cultivated crops on this area (maize, beet, alfalfa, barely) are used only for animal feed, the heavy metal analysis indicated that the concentration of Cr, Cu, Ni and Pb in these plants, especially alfalfa and maize, is more than the maximum permitted levels defined in different standards.

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Section: Soils Geochemical Compositionmentioning

confidence: 99%

Geochemical and environmental investigation of sewage-irrigated soils and crops of Sabzevar, NE of Iran

2019

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“…1). The northern heights of the Davarzan plain are part of Sabzevar ophiolite mélange (SOM), (Mazhari and Attar, 2015). The main lithological units in the Davarzan area can be divided into two groups of Eocene rocks and the main ophiolite unit.…”

Section: Study Area Descriptionmentioning

confidence: 99%

Groundwater conceptual pollution model and related human health hazards, the main dilemma of a desert aquifer near ophiolite complex

Sudegi

Bagheri

Jafari

et al. 2023

Environ Geochem Health

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Groundwater is a nite resource in Davarzan region with limited annual rainfall in the northeast of Iran. This aquifer is located between the ophiolite complex mountain in the north and salty playa at the south. 26 groundwater and 4 springs' samples were analyzed to assess the origin of groundwater pollution and explains links between the disturbed heavy metals composition of the earth's surface and the human health risks. The main heavy metal pollutants in the groundwater are Cr, Fe, As and Pb ions. In general, the groundwater salinity and some elements such as Cr and As are increased along with surface topography and groundwater ow directions from the northern ophiolite highlands recharge area to the adjacent desert discharging zone in the south. Despite the ophiolite complexes being the most enriched in Cr element, the lowest Cr concentration in the groundwater was measured near the ophiolite area, which is in the range of its discharged springs. Based on the groundwater conceptual pollution model, bedrock geochemistry controls the composition of soil and hence that of groundwater. The Cr samples show a direct relation with the EC value indicating that intrusion of salinity from the salt pan is probably another reason for the increased Cr concentration. They are the most important natural sources of metal entry into bodies of the groundwater. The results of health risk assessment indicated that the groundwater suffered from signi cant contamination and if used for long-term without pre-treatment, may pose serious health risks to human population via drinking water and irrigation of agricultural elds. This is the rst attempt to apply hydrogeological setting along with the source of pollution and its health risk in a desert-ophiolitic area.

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Effects of rare earth elements (REE) on terrestrial organisms: current status and future directions

et al. 2022

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Rare earth elements in surface soils of the Davarzan area, NE of Iran

Cited by 15 publications

References 29 publications

Geochemical and environmental investigation of sewage-irrigated soils and crops of Sabzevar, NE of Iran

Geochemical and environmental investigation of sewage-irrigated soils and crops of Sabzevar, NE of Iran

Groundwater conceptual pollution model and related human health hazards, the main dilemma of a desert aquifer near ophiolite complex

Effects of rare earth elements (REE) on terrestrial organisms: current status and future directions

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