Monitoring the Atmospheric Deposition of Heavy Metals at Source and Non-Source Oriented Sites of Varanasi, India
We measured the atmospheric depositions of total particulates and seven heavy metals (Cd, Cr, Cu, Mn, Ni, Pb and Zn) at twentytwo urban and sub-urban locations of Varanasi, a holy city of India. Heavy metals in bulk deposits were measured using atomic absorption spectrophotometry. Atmospheric depositions of Zn remained highest
(31.65 to 636.15 g ha-1y-1) followed by Mn (8.1 to 379.5 g ha-1y-1), Pb (5.0 to 140 g ha-1y-1), Cu (4.5 to 122.7 g ha-1y-1), Ni (2.0 to 58.1 g ha-1y-1), Cr (5 to 55 g ha-1y-1) and Cd remained the lowest (0.45 to 17.7 g ha-1y-1). The deposition of heavy metals remained highest during winter and lowest during rainy season. Atmospheric emissions coupled with wind actions appeared to have raised atmospheric loadings of heavy metals even in areas far away from source oriented sites. Since the city of Varanasi is flanked by a vast stretch of holy river Ganga at one side and agricultural lands at other sides, our data have relevance establishing air-soil-water-vegetable continuum of heavy metals from a human health perspective.
Allen, S.E., Grimshaw, H.M. and A.P. Rowland (1986). Chemical analysis. In: Methods in Plant Ecology. 2nd ed. P.D. Moore and S.B. Chapman (eds). Blackwell Scientific Publication, Oxford, London, 285-344.
Azimi, S., Cambier, P., Lecuyer, I. and D. Thevenot (2004). Heavy metal determination in atmospheric deposition and other fluxes in northern France agroecosystems. Water, Air, and Soil Pollution, 157: 295-313.
Azimi, S., Rocher, V., Gamaud, S., Varreult, G. and D.R. Thevenot (2005). Decrease of atmospheric deposition of heavy metals in urban areas from 1994 to 2002, Paris, France. Chemosphere, 61: 645-651.
Conko, K.M., Rice, K.C. and M.M. Kennedy (2004). Atmospheric wet deposition of trace elements to a suburban environment, Reston, Virginia, USA. Atmospheric Environment, 38: 4025-4033.
Dolk, H.M. and M. Vrijheid (2003). The impact of environmental pollution on congenital anomalies. British Medical Bulletin, 68: 25-45.
Jain, M., Kulshrestha, U.C., Sarkar, A.K. and D.C. Parashar (2000). Influence of crustal aerosols on wet deposition at urban and rural sites in India. Atmospheric Environment, 34: 5129-5137.
Khillare, P.S., Balachandran, S. and B.R. Meena (2002). Spatial and temporal variation of heavy metals in atmospheric aerosol of Delhi. Environmental Monitoring and Assessment, 90: 1-21.
Kim, G., Scudlark, J.R. and T.M. Church (2000). Atmospheric wet deposition of trace elements to Chesapeake and Delaware Bays. Atmospheric Environment, 34: 3437-3444.
Lawlor, A.J. and E. Tipping (2003). Metals in bulk deposition and surface waters at two upland locations in Northern England. Environmental Pollution, 121: 153-167.
Moseholm, L., Larsen, E.H., Andersen, B. and M.M. Nielsen (1992). Atmospheric deposition of trace elements around point sources and human health risk assessment. I: Impact zones near a source of lead emissions. The Science of the Total Environment, 126: 243-262.
Pandey, J., Agrawal, M., Khanam, N., Narayan, D. and D. Rao (1992). Air pollutant concentrations in Varanasi, India. Atmospheric Environment, 26B: 91-98.
Pandey, J. and M. Agrawal (1994). Evaluation of air pollution phytotoxicity in a seasonally dry tropical urban environment using three woody perennials. The New Phytologist, 126: 53-61.
Pandey, J. (2005). Evaluation of air pollution phytotoxicity downwind of a phosphate fertilizer factory in India. Environmental Monitoring and Assessment, 100: 249-266.
Pandey, J. and K. Shubhashish (2006). Atmospheric deposition of nutrient elements at selected urban sites of Varanasi, India. In: Proceedings of Environmental Degradation and Conservation, 16-17 December, 2006. Jaspal Prakashan, Patna, India.
Pandey, J. and U. Pandey (2009). Accumulation of heavy metals in dietary vegetables and cultivated soil horizon in organic farming system in relation to atmospheric deposition in a seasonally dry tropical region of India. Environmental Monitoring and Assessment, 148: 61-74.
Polkowska, Z., Grynkiewicz, M., Górecki, T. and J. Namieœnik (2001). Level of lead in atmospheric deposition in a large urban agglomeration in Poland. Journal of Environmental Monitoring, 3: 146-149.
Reinfelder, J.R., Totten, L.A. and S.J. Eisenreich Michael Aucott (2005). Research Project Summary. New Jersey Atmospheric Deposition Network (April, 2005).
Sharma, R.K., Agrawal, M. and M. Marshall (2007). Heavy metal contamination of soil and vegetables in suburban area of Varanasi, India. Ecotoxicology and Environmental Safety,66: 258-266.
Singh, R.K. and M. Agrawal (2005). Atmospheric depositions around a heavily industrialized area in a seasonally dry tropical environment of India. Environmental Pollution,138: 142-152.
Stern, A.C., Boubel, R.W., Turner, D.B. and D.L. Pox (1984). Sources of air pollution. In: Fundamentals of Air Pollution, 2nd edn. Academic Press, New York. 76-100.
Sweet, C.W., Weiss, A. and S.J. Vermette (1998). Heavy metal balances of agro-ecosystems in the Netherlands. Netherlands Journal of Agricultural Science, 46: 171-192.
Thornton, G.J.P. and N.B. Dise (1998). The influence of catchment characteristics, agricultural activities and atmospheric deposition on the chemistry of small streams in the English Lake District. The Science of the Total Environment, 216: 63-75.