Assessment of children's exposure to arsenic from CCA-wood staircases at apartment complexes in Florida

作者：Gress, Julia Ky; Lessl, Jason T.; Dong, Xiaoling; Ma, Lena Q.^*

来源：Science of the Total Environment, 2014, 476: 440-446.

DOI：10.1016/j.scitotenv.2014.01.018

• Chromated copper arsenate
• Bioaccessible
• Dislodgeable arsenic
• Lifetime average daily dose
• SHEDS-Wood model

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 mu g/day from ingestion of dislodgeable As. Lifetime average daily doses from ingestion of dislodgeable As and soil ranged from 8.1 x 10(-6) to 3.0 x 10(-5) mg/kg/day, with estimated cancer risks being 1.2-4.5 x 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. Published by Elsevier B.V.

• 出版日期2014-4-1
• 单位污染控制与资源化研究国家重点实验室; 南京大学