PMID: 16509348Mar 3, 2006Paper

Release of arsenic to the environment from CCA-treated wood. 2. Leaching and speciation during disposal

Environmental Science & Technology
Bernine I KhanYong Cai

Abstract

Wood treated with chromated copper arsenate (CCA) is primarily disposed within construction and demolition (C&D) debris landfills, with wood monofills and municipal solid waste (MSW) landfills as alternative disposal options. This study evaluated the extent and speciation of arsenic leaching from landfills containing CCA-treated wood. In control lysimeters where untreated wood was used, dimethylarsinic acid (DMAA) represented the major arsenic species. The dominant arsenic species differed in the lysimeters containing CCA-treated wood, with As(V) greatest in the monofill and C&D lysimeters and As(III) greatest in the MSW lysimeters. In CCA-containing lysimeters, the organoarsenic species monomethylarsonic acid (MMAA) and DMAAwere virtually absent in the monofill lysimeter and observed in the C&D and MSW lysimeters. Overall arsenic leaching rate varied for the wood monofill (0.69% per meter of water added), C&D (0.36% per m), and MSW (0.84% per m) lysimeters. Utilizing these rates with annual disposal data, a mathematical model was developed to quantify arsenic leaching from CCA-treated wood disposed to Florida landfills. Model findings showed between 20 and 50 t of arsenic (depending on lysimeter type) had leached prior to 2000...Continue Reading

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Citations

Mar 14, 2012·Applied Microbiology and Biotechnology·Shubhi SrivastavaNandita Singh
Feb 10, 2010·Environmental Geochemistry and Health·Howard W MielkePaul W Mielke
Mar 27, 2009·Journal of the Air & Waste Management Association·Elisabeth L HawleyMichael C Kavanaugh
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Aug 11, 2021·Chemosphere·Lais Gonçalves da CostaAmy B Bishell
Jan 31, 2015·Environmental Science & Technology·Raoul-Marie CoutureChristopher T Parsons

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