Abstract
An evaluation of environmental pollution in the region of Bordj Bou Arreridj (BBA), Algeria according to metallic trace elements has been carried out, to determine the levels of the 10 elements accumulated in lichens and the different sources found in the region. A total of 192 samples of Xanthoria parietina lichen were collected over an area of 3920.42 km². Sampling sites include urban sites, rural sites, green parks, sites near high traffic streets and industrial enterprises. The lichen samples were analyzed by FAAS for the ten elements and their concentrations were mapped. Concentrations of Pb, Cd, Sb and Zn were higher at urban sites and increased with proximity to highways and industrial areas. These results suggest that the composition of lichen elements is strongly affected by road traffic. While the sources of the elements Co, Ni, Fe, Mn and Cr probably come from dust from quarrying and contaminated soil deposits in particular, to the north and west of the region. This mapping of metal pollution can establish the first biological monitoring network in the study area. Keywords: Biomonitoring of lichens, Metallic elements, Pollution sources, Distribution maps, BBA. DOI: 10.7176/JEES/12-2-03 Publication date: February 28 th 2022
Highlights
IntroductionEmissions such as the elements have long been recognized as potential threats to the environment and human health (Azimi et al 2005)
Materials and methods 2.1 Study area The sampling was carried out in the region of Bordj Bou Arreridj (BBA) located in the North East of Algeria, which has a total area of 3920.42 km2
The coefficient of variation (CV) of metallic trace elements (MTE) concentrations in the thalli measured is varied between 18.2%
Summary
Emissions such as the elements have long been recognized as potential threats to the environment and human health (Azimi et al 2005). In this problem, the metallic trace elements (MTE) that are mentioned in the literature constitute the most important category of atmospheric pollutants. In order to follow this pollution with the measurement of MTE in the atmosphere, physical and chemical methods as well as biological methods are available (De Temmerman et al 2004). Physico-chemical measurements are objective and precise methods, but the use of this technical equipment is not widespread for economic reasons, compared to biological methods (Conti & Cecchetti 2001; Wolterbeek 2002; Tian et al 2015)
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