![]() ![]() Heavy metal contamination of aquatic ecosystems has received much attention because of its toxicity, abundance, and persistence (Arnason and Fletcher 2003). The major highway like Dhaka Aricha highway is being polluted for vehicle emissions, an industrial pollution that causes the disturbance of the environment. The situation is worst in the transition point of the city like bus stands. High population and large density of vehicle emissions are industrial pollutions that are circulated everywhere, the main culprits to degrade the system (Chowdhury 2006 Islam 2014). Environmental pollution has crossed its line, degrading the whole environment day by day. Dhaka, a megacity in the world, is in the worst situation in terms of environmental perspective. Our planet, or in a small sense the environment, has the capability to minimize the adverse effects, but now, it is alarming for us to think about it. Rapid urbanization and industrialization in Bangladesh leads to economic growth and gives the chance of thinking of being a developed country in the future on the other side, this process changes the whole environment drastically. These results might be helpful for future monitoring of further increase of heavy metal concentrations in surface soils along highways. R-mode cluster analysis reveals three distinct groups in both site and metal basis clustering that shows a similar pattern with the PCA. Principal component analysis (PCA) of parameters exhibits three major components. Pollution load index calculated from the CFs indicates that soils are strongly contaminated by Zr and Sn. The resulting geoaccumulation index ( I geo) value shows the following order: Sn > Zr > P > Mn > Zn > Rb > Fe > Ba > Ti > Sr > K > Ca > Al. Pollution indices are determined by enrichment factor in an order of Zr > Sn > P > Mn > Zn > Rb > Fe > Ba > Sr > Ti > K > Ca > Al. Thirteen different metals were found in the tested samples. Surface soil samples were collected in dry season from different locations of Dhaka Aricha highway and analyzed by energy dispersive X-ray fluorescence (EDXRF). ![]() In this study, metal pollution and their sources in surface soils were evaluated by pollution indices and multivariate statistical techniques in association with a geographical information system (GIS). ![]()
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