title: Bioaccessibility and health risk of arsenic, mercury and other metals in urban street dusts from a mega-city, Nanjing, China.
abstract: The oral bioaccessibility and the human health risks of As, Hg and other metals (Cu, Pb, Zn, Ni, Co, Cd, Cr, Mn, V and Fe) in urban street dusts from different land use districts in Nanjing (a mega-city), China were investigated. Both the total contents and the oral bioaccessibility estimated by the Simple Bioaccessibility Extraction Test (SBET) of the studied elements varied with street dusts from different land use districts. Cd, Zn, Mn, Pb, Hg and As showed high bioaccessibility. SBET-extractable contents of elements were significantly correlated with their total contents and the dust properties (pH, organic matter contents). The carcinogenic risk probability for As and Cr to children and adults were under the acceptable level (<1×10(-4)). Hazard Quotient values for single elements and Hazard Index values for all studied elements suggested potential non-carcinogenic health risk to children, but not to adults.
authors.affiliation: Key Lab of Analytical Chemistry for Life Science, Ministry of Education, Center of Material Analysis, Nanjing University, Nanjing 210093, Jiangsu Province, PR China. huxin_china@yahoo.com
authors.forename: Xin
authors.initials: X
authors.lastname: Hu
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jun
authors.initials: J
authors.lastname: Luo
authors.forename: Tijian
authors.initials: T
authors.lastname: Wang
authors.forename: Hongzhen
authors.initials: H
authors.lastname: Lian
authors.forename: Zhuhong
authors.initials: Z
authors.lastname: Ding
mesh_terms: D000328:Adult; D001151:Arsenic / Q000032:analysis*; D001682:Biological Availability; D002274:Carcinogens, Environmental / Q000032:analysis*; D002648:Child; D002681:China; D002947:Cities; D004391:Dust / Q000032:analysis*; D004781:Environmental Exposure / Q000032:analysis*; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis*; D018570:Risk Assessment
chemical_list: D002274:Carcinogens, Environmental; D004391:Dust; D019216:Metals, Heavy; D001151:Arsenic