A mass balance approach for evaluating leachable arsenic and chromium from an in-service CCA-treated wood structure
A mass balance approach for evaluating leachable arsenic and chromium from an in-service CCA-treated wood structure
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DOI：
10.1016/j.scitotenv.2006.10.037
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发表时间：
2007-01-01
影响因子：
9.8
通讯作者：
Townsend, Timothy G.
中科院分区：
文献类型：
--
作者：
Shibata, Tomoyuki;Solo-Gabriele, Helena M.;Townsend, Timothy G.
许多现有的住宅木结构，如玩具和甲板，已处理铬酸铜砷酸盐（CCA）。这种防腐化学品可以通过与降雨接触，随着时间的推移逐渐从这些结构中释放出来。本研究的目的是评估从暴露于降雨的在役CCA处理甲板中浸出的砷和铬的水平，以及它们对土壤和浅层地下水的可能影响。两个监测站，一个包含CCA处理的甲板，另一个包含未处理的甲板作为对照，在本研究的外部建造。降雨，径流水从甲板上，甲板下的土壤，渗透水通过0.7米深的土壤进行了监测砷和铬在为期3年。经CCA处理的表层径流中砷（0.114-4.66 mg/L）和铬（0.0080.470 mg/L）的浓度显著高于未经CCA处理的表层径流（
Many existing residential wood structures, such as playsets and decks, have been treated with chromated copper arsenate (CCA). This preservative chemical can be released from these structures incrementally over time through contact with rainfall. The objective of this study was to evaluate the levels of arsenic and chromium leached from an in-service CCA-treated deck exposed to rainfall, as well as their possible impacts on soils and shallow groundwater. Two monitoring stations, one containing a CCA-treated deck and the other containing an untreated deck as a control, were constructed outside for this study. Rainfall, runoff water from the decks, soils below the decks, and infiltrated water through 0.7-m depth of soil were monitored for arsenic and chromium over a period of 3 years. The concentration of the CCA-treated deck runoff for arsenic (0.114-4.66 mg/L) and chromium (0.0080.470 mg/L) were significantly (p < 0.001) higher than the untreated deck runoff (