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 P. Ravikumar, K.L. Prakash, R.K. Somashekar, Air quality indices to understand the ambient air quality in vicinity of dam sites of different irrigation projects in Karnataka State, India International Journal of Science and Nature. 5 (3) (2014).
 K. Ravindra, A. K. Mittal, R. Van Grieken, Health risk assessment of urban suspended particulate matter with special reference to polycyclic aromatic hydrocarbons: A review. Rev. Environ. Health. 16 (2001) 169-189.
 M. Prakash, J.K. Bassin, Analysis of ambient air quality using air quality index – a case study, International Journal of Advanced Engineering Technology, Vol. 1 (II) (2010) 106-114.
 J. M. Okuo, P. O Okolo, Levels of As, Pb, Cd and Fe in total suspended particulate matter (TSPM) in ambient air of artisan's workshops in Benin City, Nigeria, J. Sci and Ind. Stud. 1(1) (2003) 32 – 35.
 I. U. Chiemeka, Air aerosols metal constituents and concentration at Okigwe Nigeria, Int.J. of Physical Sc. 5(4) (2010) 283 – 286.
 G. Majewski, M. Klenieewska, A. Brandyk, Seasonal variation of particulate matter mass concentration and content of metal, Polish J. of Eniron. Stud. 20(2) (2011) 417 – 427.
 Understanding particle pollution, www3. epa. gov/airtrends/aqtrnd04/pmreport03/ pmunderstand_2405. pdf, accessed 10/01/(2016).
 S. C. Bhatia, Environmental Chemistry, CBS Publishers, New Delhi-110002, India (2002) pp.132-174.
 S. E Manahan, Fundamentals of environmental chemistry, CRC press LLC, Boca Raton, (2011) p.521 – 529.
 M. Langner, T. Draheim, W. Endlicher, Particulate Matter in the Urban Atmosphere: Concentration, Distribution, Reduction – Results of Studies in the Berlin Metropolitan Area; In Perspectives in Urban Ecology, W. Endlicher et al. (Eds. ), Springer-Verlag Berlin Heidelberg, (2011).
 S.O. Ngele, F.K. Onwu, Measurement of ambient air fine and coarse particulate matter in ten South – East Nigerian cities. Res. J. Chem. Sc. 5(1) (2015) 71 – 77.
 A. Pederzoli, M. Mircea, S. Finard, A. di Sarray, Zanini G., Quantification of Saharan 622 dust contribution to PM10 concentrations over Italy during 2003-2005, Atmos. Environ. 44 (2010) 4181-4190.
 D.R. Gomez, S.L. Reich, L.E. Dawidowski, C. Vazquez, A combined analysis to identifyairborne PM10 sources, J. Environ. Monit. 7(2005)52-59.
 V. P. Aneja, A. Aaron Isherwood, P. Morgan, Characterization of particulate matter (PM10) related to surface coal mining operations in Appalachia, Atmospheric Environment 54 (2012) 496 – 501.
 S. Arslan, A. Aybeka, H. C. Ekerbdçer, Measurement of personal PM10, PM2. 5 and PM1 exposures in tractor and combine operations and evaluation of health disturbances of operators, Journal of Agricultural Sciences. 16 (2010) 104-115.
 C.Y. Yang,C. C. Chang, H.Y. Chuang, S.S. Tsai, T. N. Wu, C.K. Ho, Relationship between air pollution and daily mortality in a subtropical city: Taipei Taiwan, Environ Int. 30 (2004) 519–23.
 R. Afroz, M. N. Hassan, N. A. Ibrahim Review of air pollution and health impacts in Malaysia, Environmental Research. 93(2) (2003) 71-78.
 S. M. Hassan and M. E. Abdullahi, Evaluation of pollutants in ambient air; A case study of Abuja, Nigeria, Int. J. Sci. and Research 2(12) (2012) 1-9.
 D. Giri, V. Krishna Murthy, P. R. Adhikary, The Influence of Meteorological Conditions on PM10 Concentrations in Kathmandu Valley, Int. J. Environ. Res. 2(1) (2008) 49-60.
 P. K. Bhuyan, P. Samantray, S. P. Rout, Ambient air quality status in Choudwar area of Cuttack District. International J. Environmental Sciences. 3(1) (2010) 343-356.
 G. Norris, S.N. Youngpong, J.O. Koening, T.V. Larson, L. Sheppard, J.W. Stout, An association between fine particles and asthma emergency department visits for children in Seattle, Environ. Health Perspect. 107 (1999)489-493.
 A.C. Pope, Epidemiology of Fine Particulate Air Pollution and Human Health, Biologic Mechanism and who's at Risk?, Environ. Health Perspect. 108 (2000) 713-723.
 J.M. Samet, F. Dominic, F.C. Currieo, T. Course, S. Zeagr, Fine Particulate Air Pollution and Mortality in29 US Cities 1987-1994, N. Engl. J. Med. 343 (2000) 1742-1749.
 S.G. Ong, J. Liu, C.M. Wong, T.H. Lam, A.Y. Tam, L Daniel, A.J. Hedley, Studies on respiratory health of primary school children in urban communities of Hong Kong, Science Total Environ. 106 (1991) 121-135.
 S. K Prajapati, B.D. Tripathi, Seasonal variation of leaf dust accumulation and pigment content in plant species exposed to urban particulate pollution, J. Environmental Quality. 37 (2008) 865-870.
 EPA, Protecting visibility: An EPA report to congress, research triangle park, NC office of air quality and planning standards EPA report no. EPA-450/5-79-008 (1979).
 Y.J. Kim, K.W. Lee, S. Kim and J.S. Ham, Fineparticulate characteristics and its impact on visibility impairment at two urban sites in Korea; Seoul and Incheon, Atmospheric Environment. 40 (2006) 5593-5605.
 M. Ferm, J. Watt, S. O'Hanlon, F. De Santis, C. Varotasas, Deposition Measurement of particulate matter in connection with corrosion studies. Anal Chem. Bioanal. 384 (2006) 1320-1330.
 B. Sengupta (Ed. ), Guidelines for ambient air quality monitoring, National ambient air quality monitoring series, NAAQMS. Central pollution control board, Parivesh Bhawan, East Ajun Nagar, Delhi, April, 2003, http: /www. cpcb. nic. in/newitems/7. pdf accessed 20/03/(2014).
 C.O. Ogba, B.P. Utang, Air pollution climatology in spatial planning for Sustainable development in the Niger Delta, Nigeria, TS 1D – Environment and land use planning, FIG working week 2009 Surveyor's Key Role in Accelerated Development, 3-8 May, 2009, Eilat, Israel. https: /www. fig. net/resources/proceedings/fig_proceedings/fig2009/papers/ts01d/ ts01d_ogba_utang_3202. pdf accessed 19/12/15 (2009).
 F.C. Ibe, P.C. Njoku, J.I. Alinnor, A.I. Opara, Spatial variation of NO2 and SO2 in the ambient environment of Imo State, Nigeria, IJSET. 5(1) (2016) 33 – 46.
 D. Kim, K. Lee, J. Cha, S. Lee, Temporal and spatial distribution of troposphericNO2 over Northeast Asia using OMI data during the years 2005–2010Atmospheric Pollution Research. 6 (2015) 768-777.
 T.W. Wong, W.W.S. Tam, A.K.H. Lau, S.K.W. Ng, I.T.S. Yu, A.H.S. Wong, D. Yeung, A Study of the Air Pollution Index Reporting System; Tender Ref. AP 07-085, Environmental Protection Department (EPD) of the Hong Kong, Final report, Hong Kong, 27 June 2012, pp.1-51.
 US, EPA, Air quality index (AQI); A guide to air quality and your health, U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Outreach and Information Division. Research Triangle Park, NC. February 2014. EPA-456/F-14-002, www3. epa. gov/airnow/aqi_brochure_02_14. pdf, accessed 12/01/(2016).
 C.S. Li, C.H. Lin, Carbon profile of residential indoor PM1 and PM2. 5 in the subtropical region. Atmospheric Environment. 37 (2003) 881–888.
 O. Hanninen, G. Hoek, S. Mallone, E. Chellini, K. Katsouyanni, C. Gariazzo, G. Cattani, A. Marconi, P. Molnar, T. Bellander, M. Jantunen, Seasonal patterns of outdoor PM infiltration into indoor environments: Review and meta–analysis of available studies from different climatological zones in Europe. Air Quality Atmosphere and Health. 4 (2011).
 S. Sidra, Z. Ali, Z., A. Nasir and I. Colbeck, Seasonal variation of fine particulate matter in residential micro–environments of Lahore, Pakistan, Atmospheric Pollution Research. 6 (2015) 797‐804.
 W. Huang, E. Long, J. Wang, R. Huang and L. Ma, Characterizing spatial distribution and temporal variation of PM10 and PM2. 5 mass concentrations in an urban area of Southwest China, Atmospheric Pollution Research. 6 (2015) 842‐848.
 E.A. Ubuoh, S. M.O. Akhionbare, Effect of pig production on the ambient air quality of Egbeada in Mbaitoli LGA of Imo State, Nigeria, J. Sci. and Multidisciplinary Research. 3 (2011) 8-16.
 U.K. Okoro, W. Chen, T.C. Chineke, O.K. Nwofor, Recent monsoon rainfall characteristics over the Niger Delta Region of Nigeria: A casual link, IJSET. 3 (2) (2014) 634-651.
 U.K. Okoro, W. Chen, T.C. Chineke, O.K. Nwofor Comparative analysis of gridded datasets and gauge measurements of rainfall in the Niger Delta region of Nigeria, Research Journal of Environ. Sci. 8(7) (2014) 373 – 390.
 FRN (Federal Republic of Nigeria), Official Gazette, Legal Notice on publication of the details of the Breakdown of the National and State Provisional total, 2006 Census. Federal Republic of Nigeria Official Gazette, Government Notice No. 21, Lagos, 15th May, 2007, Vol. 94, pp.1-26.
 F. C. Ibe, P. C. Njoku, J. I. Alinnor, A. I. Opara, Evaluation of ambient air quality in parts of Imo State, Nigeria. Res. J. Chem. Sci. 6(1) (2016) 41-52.
 O. Odeyemi, and O.A. Ogunseitan, Petroleum Industry and its Pollution Potentialin Nigeria. Oil & Petroleum Pollution, Applied Science. 2 (1985)223-228.
 NNPC, (Nigeria National Petroleum Corporation), Nigerian National Petroleum Cooperation, Monthly Petroleum Information, September 1984, Lagos, Nigeria, Vol. 53.
 Y. Mohammed, J.J. Caleb, Assessment of some air pollutants and their corresponding air quality at selected activity areas in Kaduna metropolis. Proceedings of 37th Annual International Conference of Chemical of Nigeria (SCN) at Uyo, Akwa Ibom State Nigeria, 7th – 12th September, 2014, Vol. I (2014).
 E.N. Verla, A.W. Verla, L. Ugwulor, Seasonal variation of heavy metals in playgrounds of public schools within Owerri Metropolis, Imo State, Nigeria, International Letters of Chemistry, Physics and Astronomy. 50 (2015) 61-70.
 D.S. Wilks, Statistical methods in the atmospheric sciences, 2nd edition, Academic press, California, (2006).
 B. Gomisceka, H. Hauck, S. Stoppera, O. Preining, Spatial and temporal variations of PM1, PM2. 5, PM10 and particle number concentration during the AUPHEP - project, Atmospheric Environment. 38 (2004) 3917 -3934.
 B.S. Bada, K.A. Olatunde, O.A. Oluwafunmilayo, Air quality assessment in the vicinity of quarry site, Environment and Natural Resources Research. 3(2) (2013) 111-115.
 N. Egwurugwu, A. Nwafor, O.J. Oluronfemi, S.C. Iwuji, E.A. Alagwu, Impact of prolonged exposure to oil and gas flares on human renal functions, Int. Res. J. Medical Sci. 1(11) (2013) 9-16.
 M. Rhonda, Air Quality and Agriculture, AG/Environment/2015-01pr, March 2015 https: /agwastemanagement. usu. edu/Air_Quality_and_Agriculture. pdf. accessed 26/02/(2016).
 V. K. Nartey, J. N. Nanor, R. K. Klake, Effects of quarry activities on some selected communities in the Lower Manya Krobo District of the Eastern Region of Ghana, Atmospheric and Climate Sciences. 2 (2012) 362-372.
 A. Titi, M. Dweirj, K. Tarawneh, Environmental effects of the Open Cast mining a Case Study: Irbid Area, North Jordan, American Journal of Industrial and Business Management. 5 (2015) 404-423.
 United States Environmental Protection Agency, AP-42 Emission Factors. Brick and Structural Clay Product Manufacturing. U. S. Environmental Protection Agency Office of Air Quality Planning and Standards, Emission Factor and Inventory Group Research Triangle Park, NC 27711, August, 1997. https: /www3. epa. gov/ttnchie1/ap42/ch11/bgdocs/b11s03. pdf, accessed 26/02/(2016).
 M. Kampa, E. Castanas, Human Health Effects of Air Pollution. Environmental Pollution, 151 (2008) 362-367.
 Particulate Matter Pollution Fact Sheet, https: /ndep. nv. gov/baqp/monitoring/ docs/particulate_matter. pdf, accessed 02/03/(2016).
 R.A. Norrimi, A. R. Nor, I.M. Nuru, S. Y. Ahmad, Time Series Evaluation of Ozone Concentrations in Malaysia Based on Location of Monitoring Stations, International Journal of Engineering and Technology. 3(3) (2013) 390 – 394.
 G. Nunnari, S. Dorling, U. Schlink, G. Cawley, R. Foxall, T. Chatterton, Modelling SO2 concentration at a point with statistical approaches, Environmental Modelling and Software. 19 (2004) 887-905.
 G. Saffarini, S. Odat, Time series analysis of air pollution in Al-Hashimeya Town Zarqa, Jordan, Jordan Journal of Earth and Environmental Sciences. 1(2) (2008) 63- 72.
 S.O. Ngele, N.I. Elom, P.A. Nwofe, P.E. Agbo, A.O. Ogah, R.C. Ehiri, Diurnal Variation of ambient air pollutants concentration in two motor parks in Ebonyi State, Nigeria, Adv. Environ. Biol. 9(23) (2015) 271-278.
 M. Marconi, D.M. Sferlazzo, S. Becagli, C. Bommarito, G. Calzolai, M. Chiari, A. di Sarra, C. Ghedini, J.L. Gómez-Amo, F Lucarelli., D. Meloni, F. Monteleone, S. Nava, G. Pace, S. Piacentino, F. Rugi, M. Severi, R. Traversi, R. Udisti, Saharan dust aerosol over the Central Mediterranean Sea: PM10 chemical composition and concentration versus optical columnar measurements, Atmos. Chem. Phys. 14 (2014).
 F. Roda, J. Bellot, A. Avila, A. Escarra, J. Piiiol, J. Terradas, Saharan dust and the atmospheric inputs of elements and alkalinity to Mediterranean ecosystems. Water, Air and Soil Poll. 66 (1993) 277-288.
 J.M. Prospero, R.A. Glaccum, R.T. Nees, Atmospheric transport of soil dust from Africa to South America, Nature. 289 (1981) 570-572.
 FRN (Federal Republic of Nigeria) (2011).