In this study, total suspended particulate matter (aerodynamic diameter range between 0.05 and 5 µm) levels in the vicinity of the Diamond Cement (DIACEM) Factory, Aflao, Ghana were measured and analyzed for As, Cr, Ni and Zn using multi-elemental technique of instrumental neutron-activation analysis. The primary objective of the study was to assess the human health risk of the trace metals exposure for children and adult population in four stratified zones in the study area. From the results, the mean dust level (538.92 µg/m3) around the cement facility deviated completely from regulatory specification (150 µg/m3) indicating massive air pollution in the area. The mean concentration (mg/kg) of trace metals in the area were found in the order of Ni (44.38) >Zn (25.65) > Cr (15.26) >As (2.87). The human-risk assessment study indicated that non-carcinogenic risk was insignificant but the risk of cancer could be probable. Ingestion exposure was the highest level of risk found for both adults and children population in the area. The study encourages more work as it cautioned that the current results cannot symbolize a general portrait of the cement industry in Ghana, explaining that similar facilities may differ in their pollution cleaning strategies and environmental conditions.
airborne dust, arsenic, carcinogenic, cement industry, enrichment factor, hazard index, ingestion, risk assessment, slope factor, trace metals
 Abdulkkareem A.S., Urban Air pollution by Computer Simulation: A Case Study of PetroleumRefining Company, Chemical Engineering Department, Federal University of Technology: Minna Niger State, Nigeria, 2008.
 Tajudeen, Y., Okpuzor, J. & Fausat, A.T., Investigation of general effects of cement dust to clear the controversy surrounding its toxicity. Asian Journal of Scientific Research, 4(4), pp. 315–325, 2011. http://dx.doi.org/10.3923/ajsr.2011.315.325
 Ahmed, H.O. & Abdullah, A.A., Dust and respiratory symptoms among cement factory workers in the United Arab emirates. Industrial Health, 50, pp. 214–222, 2012. http://dx.doi.org/10.2486/indhealth.MS1320
 Schuhmacher, M., Nadal M. & Domingo, J.L., Environmental monitoring of PCDD/Fs and metal in the vicinity of a cement plant after using sewage sludge as a secondary fuel. Chemosphere, 7, pp. 1502–1508, 2009. http://dx.doi.org/10.1016/j.chemosphere.2008.11.055
 Schuhmacher, M., Llobet, J.M., Granero, S., Rivera, J., Muller, L. & Domingo, J.L., Atmospheric deposition of PCDD/Fs near an old municipal solid waste incinerator: level in soil and vegetation. Chemosphere, 40, pp. 593–600, 2002. http://dx.doi.org/10.1016/S0045-6535(99)00292-1
 Demir, T.A., Isikli, B., Urer, S.M., Berber, A., Akar, T., Canbek, M. & Kalyoncu, C., Nickel exposure and its effects. Biometal, 18, pp. 7–13, 2005. http://dx.doi.org/10.1007/s10534-004-1209-9
 Alikija, W., Iyawe, V.I., Jarikre, L.N. & Chiwuzie, J.C., Ventilatory function of workers at Okpella cement factory in Nigeria. West African Journal of Medicine, 9(3), pp. 187–192, 1990.
 Ezenwa, A.O., A study of the prevalence of occupational diseases and the factors affecting their identification and reporting in Nigeria. Nigerian Medical Journal, 31, pp.12–14, 1996.
 Madrid, L., Diaz-Barrientos, E. & Madrid, F., Distribution of heavy metal contents of urban soils in parks of Seville. Chemosphere, 49, pp. 1301–1308, 2002. http://dx.doi.org/10.1016/S0045-6535(02)00530-1
 Abassi, M.N. & Tufail, M., Health risks assessment for heavy elements suspended in dusty air along Murree Highway, Pakistan. American-Eurasian Journal of Agriculture and Environmental Sciences, 13(3), pp. 372–377, 2013.
 WHO (World Health organization)., Cadmium environmental health criteria, Geneva, 134, 1992.
 Lai, H-Y., Hseu, Z-Y., Chen, T-C., Chen, B-C., Guo, H-Y. & Chen, Z-S., Health riskbased assessment and management of heavy metals-contaminated soil sites in Taiwan. International Journal of Environmental Research and Public Health, 7, pp. 3595–3614, 2010. http://dx.doi.org/10.3390/ijerph7103596
 Rovira, J., Mari, M., Schuhmacher, M., Nadal, M. & Domingo, J.L., Monitoring environmental pollutants in the vicinity of a cement plant: A temporal study. Archives of Environmental Contamination and Toxicology, 60, pp. 372–384, 2011. http://dx.doi.org/10.1007/s00244-010-9628-9
 Potts, P.J., Thrope, O.W., Isaacs M.C. & Wright, D.W., High-precision instrumental neutron-activation analysis of geological samples employing simultaneous counting with both planar and coaxial detectors. Chemical Geology, 48(1–4), pp. 145–155, 1985.
 Ehmann, W.D. & Vance, D.E. Radiochemistry and Nuclear Methods of Analysis, John Wiley & Sons: Lexington Kentucky Aiken, SC, pp. 45, 1991.
 USEPA (United States Environmental Protection Agency). “Soil Screening Guidance: Technical Background Document”. EPA/540/R-95/128. Office of Soild Waste and Emergency Response; 1996.
 Hu, Y., Bai, Z., Zhang, L., Wang, X., Zhang, L., Yu, Q. & Zhu, T., Health risk assessment for traffic policemen exposed to Polycyclic Aromatic Hydrocarbons (PAHs) in Tianjin, China. Science of the Total Environmental. 382, pp. 240–250, 2007. http://dx.doi.org/10.1016/j.scitotenv.2007.04.038
 Zhang, N., Liu, J., Wang, Q. & Liang Z., Health risk assessment of heavy metal exposure to street dust in the zinc smelting district, Northeast China. Science of the Total Environment, 408, pp. 726–733, 2010. http://dx.doi.org/10.1016/j.scitotenv.2009.10.075
 Man, Y.B., Sun, X.L., Zhao, Y.G., Lopez, B.N., Chung, S.S., Wu, S.C., Cheung, K.C. & Wong, M.H., Health risk assessment of abandoned agricultural soils based on heavy metal contents in Hong Kong, the world’s most populated city. Environmental International, 36, pp. 570–576, 2010. http://dx.doi.org/10.1016/j.envint.2010.04.014
 USEPA (United States EPA)., Supplement Guidance for developing soil screening level for superfund sites. OSWER 9355.4-24. Office of solid waste and Emergency Response, 2001.
 Li, P-H., Kong, S-F., Geng, C-M., Han, B., Lu, B., Sun, R-F., Zhao, R-J. & Bai1, Z-P., Assessing the hazardous risks of vehicle inspection workers’ exposure to particulate heavy metals in their work places. Aerosol and Air Quality Research, 13, 255–265, 2010.
 WHO (World Health Organization), Guidelines for air quality. WHO/SDE/OEH/0002, World Health Organization, Geneva, Switzerland, 2000. Internet address: available at http://www.who.Int/peh
 Kumar, V., Ramachandran, T.V. & Prasad, R., Natural radioactivity in Indian building materials and by-products. Journal of Radioanalytical and Nuclear Chemistry, 266(3), pp. 93–96, 2011.
 Ali-Khodja, H., Belaala, A., Demmane-Debbih, W., Habbas, B. & Boumagoura, N., Air quality and deposition of trace elements in Didouche Mourad, Algeria. Environmental Monitoring and Assessment, 138, pp. 219–231, 2000. http://dx.doi.org/10.1007/s10661-007-9792-1
 Oguntoke, O., Awanu, A.E. & Harord, J., Impact of cement factory operations on air quality and human health in Ewekoro Local Government Area, South-Western Nigeria. International Journal Environmental Studies, 69(6), pp. 934–945, 2012. http://dx.doi.org/10.1080/00207233.2012.732751
 Khamparia, A., Chattergee, S.K. & Sharma G.D., Assessment on effect of cement dust pollution on soil health. Journal of Environmental Research and Development, 7(1A), pp. 368–374, 2013.
 Tiwari, S., Arnold, R., Saxena, A., Mishra, R.M. & Tiwari, S., Seasonal concentration of SPM, SO2 and NOx in the ambient air at various sampling sites of JK white cement plant gotan, (Rajasthan). International Journal of Pharmaceutical and Life Sciences, 5(4), pp. 3485–3496, 2014.
 Zeleke, Z.K., Moen, B.E. & Bråtveit, M., Cement dust exposure and acute lung function: A cross shift study. BMC Pulmonary Medicine, 10(9), pp. 1–8, 2010. http://dx.doi.org/10.1186/1471-2466-10-19
 Banerjee, A.D.K., Heavy metal levels and solid phase speciation in street dusts of Delhi, India. Environmental Pollution, 123, pp. 95–105, 2003. http://dx.doi.org/10.1016/S0269-7491(02)00337-8
 Bhargava, A.K., Gupta, R., Bhargava, S. & Paridhi, D., Effect of automobile exhaust on total N, P and heavy metals of road side sugarcane at district Saharanpur. Ad Plant Science, 16, 557–560, 2003.