Environmental Monitoring and Assessment

, Volume 142, Issue 1–3, pp 269–278 | Cite as

Atmospheric deposition of heavy metals (Cu, Zn, Cd and Pb) in Varanasi City, India

  • Rajesh Kumar Sharma
  • Madhoolika Agrawal
  • Fiona M. Marshall
Article
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Abstract

Rapid growth in urbanization and industrialization in developing countries may significantly contribute in heavy metal contamination of vegetables through atmospheric depositions. In the present study, an assessment was made to investigate the spatial and seasonal variations in deposition rates of heavy metals and its contribution to contamination of palak (Beta vulgaris). Samples of bulk atmospheric deposits and Beta vulgaris for analysis of Cu, Zn, Cd and Pb were collected from different sampling locations differing in traffic density and land use patterns. The results showed that the sampling locations situated in industrial or commercial areas with heavy traffic load showed significantly elevated levels of Cu, Zn and Cd deposition rate as compared to those situated in residential areas with low traffic load. The deposition rates of Cu, Zn and Cd were significantly higher in summer and winter as compared to rainy season, however, Pb deposition rate was significantly higher in rainy and summer seasons as compared to winter season. Atmospheric depositions have significantly elevated the levels of heavy metals in B. vulgaris collected during evening as compared to those collected in morning hours. The study further showed that local population has maximum exposure to Cd contamination through consumption of B. vulgaris. The present study clearly points out the urban and industrial activities of a city have potential to elevate the levels of heavy metals in the atmospheric deposits, which may consequently contaminate the food chain and thus posing health risk to the local population.

Keywords

Heavy metals Deposition rate Shelf time Seasons Beta vulgaris Urban 
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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Rajesh Kumar Sharma
    • 1
  • Madhoolika Agrawal
    • 1
  • Fiona M. Marshall
    • 2
  1. 1.Department of BotanyBanaras Hindu UniversityVaranasiIndia
  2. 2.SPRU, Freeman CentreUniversity of SussexBrightonUK

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