Assessment of children's exposure to arsenic from CCA-wood staircases at apartment complexes in Florida.
Arsenic exposure from wood treated with chromated copper arsenate (CCA) remains a concern due to its presence around homes. This study evaluated children's exposure to As from CCA-treated staircases through determination of bioaccessible soil As and measurements of dislodgeable As on hand railings, steps and surfaces of household objects impacted by CCA-wood leachate. Total As concentrations in 84 soil samples from 4 apartment complexes were elevated at 1.2-66.6 mg/kg with bioaccessible As at 17-84%. Deterministic risk equations were used to estimate daily doses of As in children with estimates ranging from 0.41-54.9 μg/day from ingestion of dislodgeable As. Lifetime average daily doses from ingestion of dislodgeable As and soil ranged from 8.1×10(-6) to 3.0×10(-5) mg/kg/day, with estimated cancer risks being 1.2-4.5×10(-5). Collectively, these results highlight potential health risks in children who have near-daily exposure to As from CCA-wood and are consistent with estimates generated by USEPA's SHEDS-Wood probabilistic exposure model.
Soil Water Science Department, University of Florida, Gainesville, FL 32611, United States.
Julia Ky
JK
Gress
Soil Water Science Department, University of Florida, Gainesville, FL 32611, United States; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 201146, China.
Jason T
JT
Lessl
Soil Water Science Department, University of Florida, Gainesville, FL 32611, United States.
Xiaoling
X
Dong
Soil Water Science Department, University of Florida, Gainesville, FL 32611, United States; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 201146, China. Electronic address: lqma@ufl.edu.
Lena Q
LQ
Ma
D001149:Arsenates / Q000032:analysis* / Q000737:chemistry; D002648:Child; D004781:Environmental Exposure / Q000706:statistics & numerical data*; D005431:Florida; D015386:Hazardous Substances / Q000032:analysis* / Q000737:chemistry; D006798:Housing / Q000706:statistics & numerical data*; D006801:Humans; D015233:Models, Statistical; D014934:Wood / Q000737:chemistry*
D001149:Arsenates; D015386:Hazardous Substances; C040890:chromated copper arsenate
Bioaccessible; Chromated copper arsenate; Dislodgeable arsenic; Lifetime average daily dose; SHEDS-Wood model