Concentrations of selected toxic elements in ewe  living near an environmentally loaded area of eastern part of Slovakia

Heavy metals pollution potential in National Iron Ore Mining Company, Itakpe was investigated. Two mining sites located at the east mining pits such as M3O, which is 370 m above sea level and M2O, which is 350 m above sea level were studied. Sequential extraction techniques was utilised to examine the distribution effect of the heavy metals pollution potential on the environment. Twelve representative (six-soil, two-sediment, two-plant and two-water) samples were collected, pre-treated and prepared for this study. The atomic absorption spectrometer was used to analyse the concentration of the metals after the sequential and single-stage extractions were determined. Results showed that Chromium, Arsenic, Cadmium and Copper are more bioavailable in the study area than Lead and Iron. This findings indicate that human, animals and plants are exposed to toxic elements (metals and metalloids).

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Toxic Elements in Dried Milk and Evaluation of their Dietary Intake in Infant Formula

International Journal of Veterinary Science ◽

10.37422/ijvs/20.070 ◽

2020 ◽

Cited By ~ 1

Keyword(s):

Infant Formula ◽

Toxic Elements ◽

Daily Intake ◽

Milk Formula ◽

Tolerable Daily Intake ◽

Mean Values ◽

Infant Foods ◽

Icp Ms ◽

Maximum Limit ◽

Sensitive Group

Infant’s feeding patterns are important for development and growth; therefore babies are very sensitive to toxic elements, mainly through their food, so in the present study, the concentrations and daily intake of some Toxic Elements (TEs); Lead (Pb), Arsenic (As), Cadmium (Cd), Mercury (Hg) and Aluminum (Al) were measured in different and random 60 dried infant foods {30 infant formula (0-6 months) and 30 milk-cereal based infant formula (6 months)} which obtained from various supermarkets and pharmacies. The analysis was done using Inductive Coupled Plasma - Mass Spectrometer (ICP-MS). It could be determined the lead, arsenic, cadmium, mercury and aluminum by mean values of 0.424±0.006, 0.205±0.003, 0.014±0.0001, 0.298±0.007and 0.464±0.029 mg/Kg in the examined infant milk formula samples and a ranged minimum to maximum concentrations of 0.114-0.177, 0.155-0.293, 0.014-0.015, 0.282-0.310 and 0.287-0.437 mg/kg, respectively in the examined milk-cereal based infant formula. Present study indicates that, the greater level of contamination of examined infant formula samples with toxic elements (lead and mercury) surpasses the maximum limit and Provisional Tolerable Daily Intake (PTDI) of these elements. Mercury is over PTDI (0.0005 mg/kg bw/day) in all milk-cereal based infant formula samples, also arsenic in all examined samples of this type of formula was exceed the maximum limit (0.05 mg/kg) of Indian standard. This investigation shows such types of infant formula need more amendment to set limit of more toxic metals for this sensitive group of population.

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Hydrogeochemistry of Toxic Elements in Urbanized Geotechnical Systems

Water Quality Research Journal ◽

10.2166/wqrj.1997.030 ◽

1997 ◽

Vol 32 (3) ◽

pp. 523-550

Author(s):

S.N. Volkov

Keyword(s):

Heavy Metals ◽

Toxic Elements ◽

Life Support ◽

Alkylating Agents ◽

Pollution Sources ◽

The Urals

Abstract In urbanized geotechnical systems (UGSs), the majority of problems related to the ecological hydrochemistry of Cd, Pb, Ni and other heavy metals are the result of emergent characteristics of a system as a whole as opposed to individual pollution sources. In petrochemical UGSs, pollution of the environment from compounds containing methylating or alkylating agents results in an increase in the mobility of Cd, Pb, Ni, Cr and As. This process is controlled by environmental and microclimatic factors rather than by pollution sources. Under conditions of predominant dust and element effects, geo-chemically paradoxical associations of Cd with Ni, Mn and Cr can be formed in the main life support media in mining and metallurgical UGSs. Uncontrolled processes of hydrochemical interactions take place in complex multifunctional UGSs, leading to a change in speciation of heavy metals, particularly cadmium. This report is part of a 5-year study of the geotechnical systems in the Urals.

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Speciation Changes of Three Toxic Elements inLentinus edodesAfter Drying and Soaking

Journal of Food Processing and Preservation ◽

10.1111/jfpp.12772 ◽

2016 ◽

Vol 41 (2) ◽

pp. e12772 ◽

Cited By ~ 4

Author(s):

Chen Chen ◽

Guitang Chen ◽

Song Wang ◽

Fei Pei ◽

Qiuhui Hu ◽

...

Keyword(s):

Toxic Elements

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Current Status and Temporal Trend of Potentially Toxic Elements Pollution in Agricultural Soil in the Yangtze River Delta Region: A Meta-Analysis

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18031033 ◽

2021 ◽

Vol 18 (3) ◽

pp. 1033

Author(s):

Shufeng She ◽

Bifeng Hu ◽

Xianglin Zhang ◽

Shuai Shao ◽

Yefeng Jiang ◽

...

Keyword(s):

Yangtze River ◽

Agricultural Soil ◽

Toxic Elements ◽

Temporal Trend ◽

Meta Analysis ◽

Yangtze River Delta ◽

Potentially Toxic Elements ◽

River Delta ◽

The Yangtze River ◽

The Yangtze River Delta

Potentially toxic elements (PTEs) pollution in the agricultural soil of China, especially in developed regions such as the Yangtze River Delta (YRD) in eastern China, has received increasing attention. However, there are few studies on the long-term assessment of soil pollution by PTEs over large regions. Therefore, in this study, a meta-analysis was conducted to evaluate the current state and temporal trend of PTEs pollution in the agricultural land of the Yangtze River Delta. Based on a review of 118 studies published between 1993 and 2020, the average concentrations of Cd, Hg, As, Pb, Cr, Cu, Zn, and Ni were found to be 0.25 mg kg−1, 0.14 mg kg−1, 8.14 mg kg−1, 32.32 mg kg−1, 68.84 mg kg−1, 32.58 mg kg−1, 92.35 mg kg−1, and 29.30 mg kg−1, respectively. Among these elements, only Cd and Hg showed significant accumulation compared with their background values. The eastern Yangtze River Delta showed a relatively high ecological risk due to intensive industrial activities. The contents of Cd, Pb, and Zn in soil showed an increasing trend from 1993 to 2000 and then showed a decreasing trend. The results obtained from this study will provide guidance for the prevention and control of soil pollution in the Yangtze River Delta.

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Two-Step Solvent Extraction of Radioactive Elements and Rare Earths from Estonian Phosphorite Ore Using Nitrated Aliquat 336 and Bis(2-ethylhexyl) Phosphate

Minerals ◽

10.3390/min11040388 ◽

2021 ◽

Vol 11 (4) ◽

pp. 388

Author(s):

Silvester Jürjo ◽

Liis Siinor ◽

Carolin Siimenson ◽

Päärn Paiste ◽

Enn Lust

Keyword(s):

Rare Earth ◽

Solvent Extraction ◽

Rare Earth Elements ◽

Toxic Elements ◽

Downstream Processing ◽

Liquid Extraction ◽

Aliquat 336 ◽

Radioactive Elements ◽

Improved Method ◽

Ph Values

Estonian phosphorite ore contains trace amounts of rare earth elements (REEs), many other d-metals, and some radioactive elements. Rare earth elements, Mo, V, etc. might be economically exploitable, while some radioactive and toxic elements should be removed before any other downstream processing for environmental and nutritional safety reasons. All untreated hazardous elements remain in landfilled waste in much higher concentration than they occur naturally. To resolve this problem U, Th, and Tl were removed from phosphorite ore at first using liquid extraction. In the next step, REE were isolated from raffinate. Nitrated Aliquat 336 (A336[NO3]) and Bis(2-ethylhexyl) Phosphate (D2EHPA) were used in liquid extraction for comparison. An improved method for exclusive separation of radioactive elements and REEs from phosphorite ore in 2-steps has been developed, exploiting liquid extraction at different pH values.

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