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VOL. 5, ISSUE 4 (2021)
A review on heavy metal contamination by non-exhaust vehicular emission on leafy vegetables growing near road side areas
Authors
Neelesh Agrawal, Asha verma
Abstract
Vehicular non-exhaust emission are the major sources for release of heavy metals in the atmosphere. The sources through which non-exhaust vehicular emissions contribute to road dust are tire, brake and clutch wear as well as road surface abrasion. The released heavy metals through traffic will easily find their way in leafy vegetables through anthropogenic sources by absorbing through their thin leafy tissues. Vehicle brakes release a significant amount of heavy metals in the form of wear particles. One of the most dangerous elements contained in brake pads is copper. Due to traffic load the vegetables grown road side may contaminate with these copper emissions in the form of wear particles from brake pads through anthropogenic source. Vegetables grown on road side fields are exposed to atmospheric pollution in the form of metal containing aerosols through vehicular emissions. These metal containing aerosols may lead high accumulation of heavy metals such as Pd, Cd, Ni, Cu and Zn in leafy vegetables due to atmospheric depositions. The number of vehicles in operation increasing year by year and lengthening of trips have resulted in the emissions of larger amount of metals originating from brake, tyre, and road wear. Zn is the most abundant heavy metal from tire wear. Its high concentration resulted from the addition of ZnO to the tire during vulcanisation. This review is an attempt to determine the effect of heavy metals coming out from non-exhaust vehicular emissions on the leafy vegetables grown near road side areas.
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Pages:25-28
How to cite this article:
Neelesh Agrawal, Asha verma "A review on heavy metal contamination by non-exhaust vehicular emission on leafy vegetables growing near road side areas ". International Journal of Chemical Science, Vol 5, Issue 4, 2021, Pages 25-28
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