Geological Environment and Engineering
Neda Khajooee; Sourosh Modabberi; Behnoush Khosh manesh Zadeh; Fatemeh Razavian
Abstract
Population growth and increasing urbanization expose city dwellers to higher degrees of urban pollutants, especially when they spend long time in enclosed environments with inadequate ventilation. This study is the first research on inorganic pollutants in indoor dust particles of Tehran city, which ...
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Population growth and increasing urbanization expose city dwellers to higher degrees of urban pollutants, especially when they spend long time in enclosed environments with inadequate ventilation. This study is the first research on inorganic pollutants in indoor dust particles of Tehran city, which applies geochemical indices to estimate the intensity of dust pollution by potentially harmful elements. A number of 31 indoor dust samples were passively collected from inside the residential and office buildings in the central and densely populated districts of the city and were analyzed by ICP-Ms at the Universitat Rovira i Virgili, Tarragona, Spain. Single geochemical indices of the Contamination Factor, Geoaccumulation Index, Enrichment Factor, and cumulative indices of Pollution Load and Potential Ecological Risk Indices were calculated. The results of elemental analysis showed that the concentration of arsenic, cadmium, copper, mercury, lead and zinc in Tehran indoor dust is higher than that in some cities in the world. On the other hand, cobalt, chromium, nickel and vanadium present low concentrations in the analyzed indoor dust samples. This result was confirmed by the cumulative indices as well as the contamination factor. In contrast, some other factors showed a low to medium degree of pollution for the above-mentioned elements. Based on the obtained concentration of elements in the dust samples, it can be argued that the geochemical indices indicating low to moderate pollution are not applicable and trustable in the current study.
Mehdi Khorasanipour; Afsaneh Barvar
Abstract
Accumulation of potentially toxic elements in agriculture soil is one of the main serious environmental concerns in the greenhouse cultivation. The environmental investigation of potentially toxic elements (V, Ag, Se, Ni, Pb, As, Cr, Co, Cd, Cu, Fe, Mo, Mn, Sn, Sb, Bi and Zn) in the greenhouse cultivated ...
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Accumulation of potentially toxic elements in agriculture soil is one of the main serious environmental concerns in the greenhouse cultivation. The environmental investigation of potentially toxic elements (V, Ag, Se, Ni, Pb, As, Cr, Co, Cd, Cu, Fe, Mo, Mn, Sn, Sb, Bi and Zn) in the greenhouse cultivated soils of the Bagher-Abad area, Jiroft is the main objective of this study. After preliminary field investigations, 20 soil samples were collected by mean of composite method. Collected samples were analyzed using inductively coupled plasma mass spectrometry (ICP-MS) method at the Labwest laboratory, Perth, Australia. The results were discussed using statistical methods and environmental indices with respect to the natural background and worldwide concentrations of target elements. The data showed that only Zn, Cd, Mo, As and in some cases Sb have medium enrichment in the investigated soils. For some of the selected soils the bioavailability or solubility of target elements was determined using 0.005M DTPA leaching solution. Among the investigated elements Cd and Zn showed the maximum bioavailable fraction corresponding to the medium to high risk assessment codes. Antimony is the only trace element that showed poor enrichment (39.3 µg/L) in the irrigation water used for the target greenhouse soils.
Soroush Modabberi; Y. Rahimsouri; A. Yaghubpur; S. Alipour
Abstract
Black shales of the abandoned antimony mine of Aq-Darreh Bala Village in northwest of Takab city, northwest Iran, contain high concentrations of toxic elements, especially As (4403–11883 ppm), Sb (405–1022 ppm) and Hg (30–58 ppm). Enrichment factor calculations revealed that some ...
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Black shales of the abandoned antimony mine of Aq-Darreh Bala Village in northwest of Takab city, northwest Iran, contain high concentrations of toxic elements, especially As (4403–11883 ppm), Sb (405–1022 ppm) and Hg (30–58 ppm). Enrichment factor calculations revealed that some trace elements including As, Sb, Hg, Zn, U, Sr, Ni, V, Co, Cu, Mo, Ni, and Zr have been depleted, while, Pb, Th, Ga, Rb, and Ta are enriched during weathering. Mass balance calculation results show the highest release percents (% loss) belongs to Cd, Zn, U, Sr, Ni, V, Cu, As, Mo, Tl, Zr, Hg and Sb respectively. The highest weight amount of released elements belongs to As, Sb, Sr, Zn, Ni, V, Zr, Cu, U, and Hg respectively. As a result, it can be concluded that the black shale outcrops in the Aq-Darreh Bala abandoned antimony mine area have a main role as a geogenic source in environmental contamination of downstream environments.
