Assessment of the current state of agricultural land pollution with heavy metals

Abstract

In the modern period the quality of the land, especially for agricultural production is an especially important aspect. For evaluation of agricultural lands pollution, a on land pollution by heavy metals, related to 1 and 2 hazard class study was conducted. The study of these metals was carried out in one of the industrial districts of the Irkutsk region – Usol’sky. The study of soils on the content of heavy metals Hg, Cu, Cd, Pb, Zn, Ni, Cr, As was carried out on different agricultural lands for different landscape structures. Grounds for selection of soil samples laid with uniform soil, vegetation conditions and uniform mechanical composition of the soil. The grounds were laid out in distant from the industrial sources, the land located under the “torch” Heating Electrical Station (HES) and the land along Federal highway and the land adjacent to industrial sites. The content of mobile forms of heavy metals are given in tabular material. Analysis of soil samples was carried out for humus horizon (0-10 cm), where the accumulation of heavy metals occurs. From the above factual (tabular) material it follows that the current state of agricultural lands of the Usol’sky district is satisfactory, with the exception of lands located along the Federal highway and land adjacent to the industrial site of OJSC (OAO) “Usol’e - Khimprom”. As studies have shown the anomalous accumulation of heavy metals in the soils of this area doesn’t occur, which can be explained by the conditions of leaching regime, the mobility of metals, light and middle loam and sandy loam mechanical composition of the soil.