Relationships Between Soil Characteristics and Concentrations of Lead and Zinc in Soils and in Oriental Tobacco

Gergana Y. Hristozova1,2, Penka S. Zaprjanova1*, Savka G. Marinova2
1 - Agricultural University, Faculty of Plant Protection and Agroecology, Department of Agroecology and Environmental Protection, 12 Mendeleev Blvd., 4000 Plovdiv, BULGARIA 2 - Plovdiv University "Paisii Hilendarski", Faculty of Physics and Technology, Department of Physics Education, 24 Tsar Asen Str., 4000 Plovdiv, BULGARIA
*Corresponding author:
Abstract. Increasing efforts to curb tobacco use worldwide have been made in recent years. Harmful substances in tobacco raw material and cigarettes have been the primary focus of attention. Obtaining information regarding the relationship between soil characteristics and the absorption of heavy metals by tobacco plants could improve the estimations for metal uptake by the plants and the associated health risks with exposure to tobacco smoke. This study was conducted in the Eastern, Central, and parts of the Western Rhodope Mountains using Oriental tobacco plants. The determined soil characteristics were: pH, humus content, and texture. Inductively coupled plasma atomic emission spectroscopy was used to measure the concentration of Pb and Zn in mature tobacco leaves, and the total content and mobile forms of the same elements in the soil. The correlation/regression analyses showed statistically significant linear relationships between the total content and mobile forms of Pb and Zn in soils. The concentration of Zn in tobacco leaves was linearly proportional to the Zn content in soils. The power model adequately reflected the relationship between the Pb total content and mobile forms in soils. The relationships between clay content and the concentrations of Pb and Zn in tobacco leaves were statistically significant.
Key words: zinc, lead, heavy metals, oriental tobacco, soil.

Ecologia Balkanica, 2020, Volume 12, Issue 1, pp. 1-10
Article № eb.19151 [Full text - PDF]pdf

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