Identification and estimation of polycyclic aromatic hydrocarbons contamination in surface soils from vicinity of village Dhandoor landfill
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Date
2023-06
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CCSHAU, Hisar
Abstract
Constant release of organic pollutants in the environment and their association with components such as soil, water and air particulate matter is a serious concern. In this process, estimation of one such organic pollutant, polycyclic aromatic hydrocarbons (PAHs) is necessary to check for their contamination exposure in soil and surrounding environment. PAHs levels in surface soils were estimated in the garbage disposal landfill site of Dhandoor, agricultural field adjacent to landfill site and roadside. The total concentration of 16 PAHs ranged between 38.8 to 412 μg/kg in landfill soils, 38.25 to 266.6 μg/kg in agricultural fields and 20.5 to 169.8 μg/kg in roadside soils. The PAHs contamination in the studied research site follow the order: landfill > agricultural field > roadside. High molecular weight of PAHs constitutes maximum of the total PAHs contamination at sites. Dominance of 4 and 5-rings PAHs at all three sampling sites, signifies pyrogenic origin of PAHs. Carcinogenic PAHs chrysene, benzo (a)-pyrene and benzo (b)-fluoranthene are identified at almost every landfill sites. Benzo(b)-fluoranthene was found slightly higher than the least contamination level at landfill sites only. It appears that the probable PAHs contamination in the surrounding agricultural field aroused due to migration of pollutants from landfill sites majorly. PAHs contamination due to vehicle emission from nearby road appears to be non-significant for landfill and agricultural field.