A solid phase extraction procedure for the determination of heavy metals in street dust from Dammam,Kingdom of Saudi Arabia and Estimation of the health risk

A relatively rapid,accurate and precise solid phase extraction procedure is developed for the determination of fe,mn,zn,cu,pb and co in street dust samples. quantitation is performed by flame atomic absorption spectrometry (faas) . the proposed method is based on the retention of the metal ions on dowexmarathon c,a strong acid cation exchange resin. the precision and accuracy of the proposed procedure wereevaluated by comparison with certified reference material (bcr 701). to best of our knowledge,there is no any study for separation and pre-concentration of heavy metals using dowex marathon c resin as a solid phase extraction. this method was applied to the determination of the analytes in street dust samples collected from dammam city,capital of the eastern province and fifth largest city in saudi arabia. the results showed that the dust samples contained significant levels of the studied metals (except cd),in comparison with the control values. in order to evaluate the contamination by heavy metals and to study their effect on the human health,contamination factor,enrichment factors,pollution load index,and modified contamination degree were calculated. the models used in present study to evaluate exposure risk of adults and children to heavy metals in street dust are based on models according to us environmental protection agency (usepa) . health risk analysis indicates that there is probably no risk to health from oral ingestion,dermal contact with dust particles and inhalation of dust particles from the air of street dust. © 2017,university of mohammed premier oujda morocco.