Field-scale leaching of arsenic, chromium and copper from weathered treated wood

被引：48

作者：

Hasan, A. Rasem ^{[1
]}

Hu, Ligang ^{[2
]}

Solo-Gabriele, Helena M. ^{[1
]}

Fieber, Lynne ^{[4
]}

Cai, Yong ^{[2
,3
]}

Townsend, Timothy G. ^{[5
]}

机构：

[1] Univ Miami, Dept Civil Architectural & Environm Engn, Coral Gables, FL 33124 USA

[2] Florida Int Univ, Dept Chem & Biochem, Miami, FL 33199 USA

[3] Florida Int Univ, SE Environm Res Ctr, Miami, FL 33199 USA

[4] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, Miami, FL 33149 USA

[5] Univ Florida, Dept Environm Engn Sci, Gainesville, FL 32611 USA

来源：

ENVIRONMENTAL POLLUTION | 2010年 / 158卷 / 05期

关键词：

ACQ; Arsenic; CCA; Chromium; Copper; Treated wood; Weathered wood; AQUATIC TOXICITY; ENVIRONMENT; SPECIATION; RELEASE; IMPACTS; SERVICE; MULCH;

D O I：

10.1016/j.envpol.2009.12.027

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Earlier studies documented the loss of wood preservatives from new wood. The objective of this study was to evaluate losses from weathered treated wood under field conditions by collecting rainfall leachate from 5 different wood types, all with a surface area of 0.21 m(2). Wood samples included weathered chromate copper arsenate (CCA) treated wood at low (2.7 kg/m(3)), medium (4.8 kg/m(3)) and high (35.4 kg/m(3)) retention levels, new alkaline copper quat (ACQ) treated wood (1.1 kg/m(3) as CuO) and new untreated wood. Arsenic was found to leach at a higher rate (100 mg in 1 year for low retention) than chromium and copper (<40 mg) in all CCA-treated wood samples. Copper leached at the highest rate from the ACQ sample (670 mg). Overall results suggest that metals' leaching is a continuous process driven by rainfall, and that the mechanism of release from the wood matrix changes as wood weathers. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1479 / 1486

页数：8

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