Transport and interaction of arsenic, chromium, and copper associated with CCA-treated wood in columns of sand and sand amended with peat.
Transport and interaction of arsenic, chromium, and copper associated with CCA-treated wood in columns of sand and sand amended with peat.
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DOI：
10.1016/j.chemosphere.2009.12.019
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发表时间：
2010-02
期刊：
影响因子：
8.8
通讯作者：
Cai Y
中科院分区：
文献类型：
--
作者：
Hu L;Diez-Rivas C;Hasan AR;Solo-Gabriele H;Fieber L;Cai Y
进行了实验室柱浸实验，以研究与经过 CCA 处理的木材相关的 As、Cr 和 Cu 在有或没有泥炭改良的沙子中的迁移和相互作用。结果表明，As、Cr和Cu在这些基质中的浸出行为完全不同。底物特性和微生物活性对这三种元素的运输和转化产生不同的影响。无论是否经过泥炭改良，砷都会迅速从柱中浸出，而铬在整个实验期间（215 天）仍保留在所有柱中。铜仅在没有泥炭的基质柱中浸出。微生物的存在明显促进了As的转运，而对Cr和Cu的转运没有表现出明显的影响。在吸附和运输过程中观察到这三个元素之间的相互作用。土壤上 Cu 的吸附随着 As 的吸附而增强，这可能是由于 As 吸附而导致土壤表面带更多的负电荷。由于 Cr 吸附引起额外的 As 结合位点，土壤上 Cr 的吸附增加了 As 的吸附。这些结果表明，受 CCA 处理的木材影响的土壤中砷浓度可能大大超过基于土壤对砷吸附能力的预测。评估经 CCA 处理的木材对人类健康的影响应考虑三种元素的独特迁移特征及其在土壤中的相互作用。
Laboratory column leaching experiments were conducted to investigate the transport and interaction of As, Cr, and Cu associated with CCA-treated wood in sand with and without peat amendment. Results showed that leaching behavior of As, Cr, and Cu in these substrates were totally different. Substrate characteristics and microorganism activity posed distinct effects on the transport and transformation of these three elements. Arsenic was rapidly leached out from the columns with or without the amendment of peat, while Cr remained in all columns during the entire experimental period (215 days). Copper was leached out only in the substrate column without peat. The presence of microorganism clearly facilitated the transport of As, while it did not show obvious effects on the transport of Cr and Cu. Interactions among these three elements were observed during the processes of adsorption and transport. The adsorption of Cu on soil was enhanced with the adsorption of As, likely caused by a more negatively charged soil surface because of As adsorption. The adsorption of Cr on soil increased the adsorption of As due to the additional As binding sites induced by Cr adsorption. These results suggest that As concentrations in the soil affected by CCA-treated wood could largely exceed predictions based on soil adsorption capacity for As. The evaluation of the impact on human health associated with CCA-treated wood should take consideration of the distinct transport characteristics of three elements and their interactions in soils.
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影响因子：
11.4
作者：
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通讯作者：
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影响因子：
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作者：
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