Determination of heavy metals in soil
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Ecologie generală şi biodiversitate (779)
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KERIMLI, Gunay, RAFIYEVA, Hicran, SAMADOVA, Aytan. Determination of heavy metals in soil . In: Ecological and environmental chemistry : - 2022, Ed. 7, 3-4 martie 2022, Chișinău. Chisinau: Centrul Editorial-Poligrafic al USM, 2022, Ediția 7, Vol.1, pp. 156-157. ISBN 978-9975-159-07-4.. 10.19261/eec.2022.v1
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Ecological and environmental chemistry
Ediția 7, Vol.1, 2022
Conferința "Ecological and environmental chemistry 2022"
7, Chișinău, Moldova, 3-4 martie 2022

Determination of heavy metals in soil

CZU: 574:504.53.054

Pag. 156-157

Kerimli Gunay, Rafiyeva Hicran, Samadova Aytan
 
Baku State University
 
 
Disponibil în IBN: 16 martie 2022


Rezumat

The term ―heavy metals‖ refers to environmental pollution and the toxic effects of elements when they enter the biota. These elements have a great affinity for physiologically important organic compounds. Heavy metals differ not only in the degree of impact on the soil, but also in the condition in which they are located. By its nature, soil is a combination of various clay minerals of organic and inorganic origin. Currently, two different terms are widely used to describe almost the same group of chemical elements: trace elements and heavy metals. In total, there are more than 40 heavy metals. Priority pollutants are Pb, Cd, Zn, Hg, As and Cu, as man-made accumulation in the environment is very high. Excessive amounts in the body of living things disrupt all metabolic processes and cause serious diseases in humans and animals. At the same time, many of their elements (Co, Cu, Zn, Se, Mn), as mentioned above, are widely used in the national economy (especially in agriculture, medicine, etc.) under the name of trace elements. The biggest threat to the soil comes from man-made factors. Various industries, where the wastes are heavy metal particles, unfortunately the best filters are equipped in such a way as to allow the passage of heavy metal elements that first enter the atmosphere and then penetrate the soil along with industrial wastes. This type of pollution is called man-made. In this case, the mechanical composition of the soil, carbonate content and absorption capacity are of great importance. Elements N, P2O5, K2O, Na, Fe, Cu, Zn in the 30-60 cm layer of the soil on the basis of the sample taken from the fruit field within the territory of Gakh region are indicated in the measure of more or less than the norm standards. Code: 23; Area: ɘibɘyli Nr.1; Depth: 0-30 sm; Plant: Meyva bagi Coordinates: Nr. 41,33327644 E: 46,84144269 Nr. Parameter Unit Norm Method Result Assessment 1 pH (1 : 2,5) μs sm 6,5-7,5 ГОСТ 26423-85 7,51 Zɘif Gɘlɘvi 2 EC % 0-4000 ГОСТ 26423-85 1728 Duzsuz 3 CaCO3 % 5-15 Seybler 2,54 Az kirɘkli 4 Humus % 3-4 Wolkey Black 2,9 Orta 5 Azot kg/ha 0,09-0,17 ГОСТ 26107-84 0,17 Yuksɘk 6 P2O5 kg/ha 60-90 Olsen 8,01 Cox Az 7 K2O mg/kg 250-500 ГОСТ 26210-91 214,2 Az 8 Na mg/kg 80-120 ГОСТ 26210-91 480 Cox Yuksɘk 9 Fe mg/kg 2,51-4,5 ГОСТ 26210-91 8,88 Yuksɘk 10 Cu mg/kg >0,2 ГОСТ 26210-92 3,2 Yetɘrli 11 Zn mg/kg 0,71-2,4 ГОСТ 26210-93 1,04 Orta It is now known that almost all particles of heavy metals can be present in the soil in the following conditions: in the form of a mixture of oxidized isomorphic particles in the form of salt deposits, in the crystal lattice, in soluble form, directly in soil solution and even part of organic matter. It should be noted that the behavior of metal particles can vary depending on redox conditions, soil composition and carbon dioxide levels. Depending on the composition of the soil, geographical data and distance from industrial areas, there may be different types of heavy metals in the soil, each of which poses a certain degree of environmental hazard. Because the structure of the soil can be different in different places, redox conditions, reactivity, as well as the binding mechanisms of heavy metals in the soil are different.