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STUDY OF THE CORRELATIVITY BETWEEN PARAMETERS AND MINERALOGY OF CONTAMINATED AGRICULTURAL SOILS
Abstract
The aim of the paper is to investigate the correlations between the parameters and mineralogy of agricultural soils contaminated by hazardous elements originated from the metallurgical industry. The mineralogical constituents of soil have a major influence on soil fertility and production capacity, as well as on migration and assimilation in various proportions of the elements both with nutritional role for plants and potential toxic ones. The importance of the study originates from the necessity of knowing the soil characteristics and composition in a specific areal in order to take appropriate measures to improve the fertility of cropping soil, reduce the transfer of dangerous elements in cultivated plants, adjusting crops rotation patterns, regulating the agronomic measures and changing the land use categories for agricultural purposes. Soil samples were taken from two horizons (depths of 0-5 cm and 5-30 cm) in different sites in three localities next to the iron and steel works of Galati, Romania. The farmlands with the cultivated plants Triticum vulgare L. (wheat) and Helianthus annuus L. (sunflower) were distributed in the northern, western and south-western part of the enterprise. The soil analyses were performed at INPOLDE interdisciplinary research network and Doctoral School of Dunarea de Jos University of Galati, Romania, and at The County Office for Pedological and Agrochemical Studies of Galati. The soils were subjected to physical-chemical analyses in order to determine those parameters that underlie the accumulation of hazardous metals in the cultivated plants (granulometric composition, pH, total CaCO3 (%), organic carbon (OC, %)). The Attenuated Total Reflectance - Fourier transform infrared (ATR-FTIR) spectroscopy technique was used to investigate the spectral signature of soil mineralogy, and the composition of wheat and sunflower tissues.
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