Correlation analysis of toxic metals on motorway and national highway


  • Shamyla Nawazish
  • Syed M. Bukhari Department of Chemistry, COMSATS Institute of Information Technology
  • Aamir Muhammad
  • Ikramullah U. Khan Department of Weed Science, The University of Agriculture, Peshawar, Pakistan
  • AJ Alhassan
  • Mumtaz Hussain
  • Asma Zaidi


Cadmium, correlation, dust, environmental pollution, lead.


Research evaluating levels of toxic metals along with the busy pollution prone, due to exhaust smoke & sand dust on roads is timely gesture. Five (5) sampling sites were strategic along Motorway (M-3) and National Highway (N-5) in Pakistan. The sites were respectively designed as; M-3a, M-3b, M-3c, M-3d, M-3e and N-5a, N-5b, N-5c, N-5d and N-5e. In each case dust was accumulated 24hours within two consecutive months, in petri plates encrusted with polystyrene foam kept 15 m away from roads as reference control and its corresponding road sites dust deposit near roads as test. The lead (Pb2+) and cadmium (Cd2+) contents were estimated using Atomic Absorption Spectrophotometer (AAS).  The results showed high Pb2+ concentration along M-3 and N-5 road sides sand dust deposit compared to controls. High Cd2+ contents were also recorded in road sides deposit at M-3e and M-3d compared to controls at 15m away from the roads. Although high levels of these toxic metals were detected in the road sides sand deposit compared to controls. The controls may be considered to also harbor reasonable concentration of the metals. The correlation co-efficient between the metal contents & traffic density proved that Pb2+ & Cd2+ were constantly toting up from vehicular (exhaust dust). The finding may therefore indicates that settlers along these roads are at high risk of toxicity of these metals.


Mehmood, A.K. & Khan, S.R. 2005. Air Pollution: Key Environmental Issues in Pakistan.Working paper series number 99: 1-22.

Sarwar, A. & Muhammad, N.K. 2014. Chemical composition of wet precipitation of air pollutants: A case study in Karachi, Pakistan. Atmosfera. 27: 35-46.

Ahmed, F. & Ishiga, H. 2006. Trace metal concentrations in street dusts of Dhaka city, Bangladesh. Atmospheric Environment 40: 3835-3844.

EPA. 2012. Alaska native village air quality fact sheet series road dust. Environmental Protection Agency Region United States. EPA 910-F-10-005.

Abdel-Latif, N.M. & Saleh, I.A. 2012. Heavy metals contamination in roadside dust along major roads and correlation with in Cairo. Egypt. The Journal of American Science 8: 379-389.

Clean Air Act USA. 1992. Emission standards for new motor vehicles or new motor vehicle engines. Legal Information Institute Cornell University. (Accessed on 03-09-2015) URL:

Dufault, R., Schnoll, R., Lukiw, W.J., LeBlanc, B., Cornett, C.H., Patrick, L., Walling, D., Steven, G. & Cride, R. 2009. Mercury exposure, nutritional deficiencies and metabolic disruptions may affect learning in children. Behavioral and Brain Functions 5: doi: 10.1186/1744-9081-5-44.

Karl, T.R., Melillo, J.M. & Petrson T.C. 2009. Global Climate Change Impacts in the United States. United States Global Change Research Program. Cambridge University Press, New York, USA. 7-188.

Roman, M., Idrees, I.M. & Sami, U.A. 2013. A sociological study of environmental pollution and its effects on the public health Faisalabad city. International Journal of Education and Research 1: 1-12.

Gen, W.Q., Allen, R., Brauer, W., Davies, M.H.W., Mancini, G.B.J. & Lear, S.A. 2014. Long-term exposure to traffic- related air pollution and progression of carotid artery atherosclerosis: a prospective cohort study. Occupational and Environmental Medicine 4: e004743.

Adams, P.W. & Lamoureux, S.A. 2005. Literature Review of the Use of Native Northern Plants for the Re-Vegetation of Arctic Mine Tailings and Mine Waste. 4-67

Khairy, M.A., Barakat, A.O., Mostafa, A.R. & Wade, T.L. 2011. Multielement determination by flame atomic absorption of road dust samples in Delta Region. Egypt. Microchemical Journal. 97: 234-242.

Awan, M.A., Ahmed, S.H., Aslam, M.R. & Qazi, I.A. 2011. Determination of total suspended particulate matter and heavy metals in ambient air of four cities of Pakistan. Iranica Journal of Energy and Environment 2: 128-132.

Florence, T.M. & Batley, G.E. 1977. Determination of the chemical forms of trace metals in natural water, with special reference to copper, lead, cadmium and zinc. Talanta 24: 151-158.

Amusan, A.A., Bada, S.B. & Salami, A.T. 2003. Effect of traffic density on heavy metal contents of soil and vegetation along roadside of Osun State, Nigeria. West African Journal of Applied Ecology 4: 107-114.

Zhang, F., Yan, X., Zeng, C., Zhang, M., Shrestha, S., Devkota, L.P. & Yao, T. 2012. Influence of traffic activity on heavy metal concentrations of roadside farmland soil in mountainous areas. International Journal of Environmental Research and Public Health 9: 1715-1731.

Arslan, H. & Gizir, A.M. 2006. Heavy-metal content of roadside soil in mersin, Turkey. Fresenius Envrnmental Bulletin 15: 15-20.

Jing, Y., Hongliang, C.L.T. & Zhao, Z. 2014. Heavy metal accumulation characteristics of Nepalese alder (Alnus nepalensis) growing in a lead-zinc spoil heap, Yunnan, south-western China. Journal of Biogeosciences and Forestry 7: 204-208.

Clarke, D.E., William, W.E., Petronis, K.R., Jean, Y.K., Chatterjee, A. & James, C.A. 2010. Increased risk of suicidal ideation in smokers and former smokers compared to never smokers: Evidence from the Baltimore ECA follow-up study. Suicide and Life-Threatening Behavior 40: 307-318.

Karar, K., Gupta, A.K., Kumar & Kantibiswas, A. 2006. Characterization and identification of the sources of chromium, zinc, lead, cadmium, nickel, manganese and iron in PM10 particulates at the two sites of Kolkata, India. Environmental Monitoring and Assessment 120: 347-360.

Peng, X., Qing, C., Deng, Y.Y.S., Ni, B., Yang, X.H. & Chen, S. 2010. Spatial and temporal effects on heavy metal pollution of atmospheric dust in fire coal of city power plant. The 4th International Conference on Bioinformatics and Biomedical Engineering, China. 1-4. Doi: 10.1109/ICBBE.2010.5514742.

Tanushree, B., Chakraborty, S., Bhumika, F. & Piya, B. 2011. Heavy metal concentrations in street and leaf deposited dust in Anand city India. Research Journal of Chemical Sciences 1: 61-66.

Veliu, A. & Syla, A. 2008. Air pollution with particulate matter and heavy metals of Kosova Thermal power plant. Journal of International Environmental Application & Science. 3: 280-287.

MEPA. 2005. Report for the Analysis of Heavy Metals by Dust Speciation. Pollution Prevention and Control Unit, MEPA. 1-14

Mehmood, Q., Arshid, P., Bibi, S.Z., Habiba, Z., Hajira, Y., Muhammad, W., Zahidullah & Sumera, A. 2013. Natural Treatment Systems as Sustainable Ecotechnologies for the Developing Countries. Biomed Research International 2013: 1-19.

Akhionbare, S.M.O. 2011. Multivariate statistical analysis of heavy metals in street dust of owerri metropolis, Nigeria. International Journal of Science and Nature 2: 844-849.

Figueroa, D.M., Margarita, D., Villanueva, O. & Parra, M.L.D. 2007. Heavy metal distribution in dust from elementary schools in Hermosillo, Sonora, Meixico. Atmospheric Environment 41: 276-288.

Hegazi, A.A. & Al-Kaydi, A.F.Y. 2010. Effect of road dust on vegetative characters and leaves heavy metal contents of Ziziphus spina-christi (L.) Willd, Syzium cumini (L.) skeels and Oleaeuropea L. seedlings. Journal of Horticulture Science and Ornamental Plants 2: 98-107.

Bada, B.S. & Oyegbami, O.T. 2012. Heavy metals concentrations in roadside dust of different traffic density. Journal of Environment and Earth Science 2: 54-59.

Junaid, A., Khan, S.A. & Khan, S.H. 2013. Heavy metals contamination in roadside soil near different traffic signals in Dubai, United Arab Emirates. Journal of Saudi Chemical Society 17: 315-319.

Jaradat, Q.K., Momani, A., Jbarah, A.Q. & Massade, A. 2004. Inorganic analysis of dust fall and office dust in an industrial area of Jordan. Environmental Research 96: 139-144.

Shinggu, D.Y., Ogugbuaja, V.O., Barminas, J.T. & TomaI, T. 2007. Analysis of street dust for heavy metal pollutants in Mubi, Adamawa State, Nigeria. International Journal of Physical Sciences 2: 290-293.

Ahmad, M., Usman, M. & Shafiq, N. 2006. Dispersion gradient of free fall dust and heavy metal elements concentrations in dust along main road. Journal of Chemical Society of Pakistan 28: 567-575.

Lamme, G., Ghim, Y.S., Broekaert, J.A.C. & Gao, H.W. 2006. Heavy metals in air of an Eastern China coastal urban area and the yellow sea. Fresenius Environmental Bulletin 15: 1539-1548.

Rashed, M.N. 2008. Total and extractable heavy metals in indoor, outdoor and street dust from Aswan city. Egypt. Clean 36: 850-857.

Bosco, M.L., Varrica, D. & Dongarra, G. 2005. Case study: inorganic pollutants associated with particulate matter from an area near a petrochemical plant. Environmental Research 99: 18-30.

Zereini, F., Alt, F., Messerschmidt, J., Wiseman, C., Feldmann, I., Von, B.A., Muller, J., Liebel, K. & Puttmann, W. 2005. Concentration and distribution of heavy metals in urban airborne particulate matter in Frankfurt am Mian, Germany. Environmental Science & Technology 39: 2983-2989.

Hussain, M.Y., Yousuf, M. & Din Imran, M.A. 2008. Pollutant of environment: Qualification, quantification and characterization of airborne particulates. Pakistan Journal of Agricultural Science 45: 116-118.

Nawazish, S., Mumtaz, H., Ashraf, M.Y., Ashraf, M. & Jamel, A. 2012. Effect of automobile related metal pollution (Pb2+& Cd2+) some physiological attributes of wild plants. International Journal of Agricultural Biology 6: 953-958.

Alhassan, A.J., Sule, M.S., Atiku, M.K., Wudil, A.M., Dangambo, M.A., Mashi, J.A. & Ibrahim, N.A. 2012. Study of Correlation between heavy metal concentration, street dust and level of traffic in major roads of Kano Metropolis, Nigeria. Nigerian Journal of Basic and Applied Science 20: 161-168.