Release of arsenic to the environment from CCA-treated wood. 1. Leaching and speciation during service

Bernine I. Khan, Helena M Solo-Gabriele, Timothy G. Townsend, Yong Cai

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Insufficient information exists about the speciation of arsenic leaching from in-service chromated copper arsenate (CCA)-treated products and the overall impact to soils and groundwater. To address this issue, two decks were constructed, one from CCA-treated wood and the other from untreated wood. Both decks were placed in the open environment where they were impacted by rainfall. Over a one-year period, rainwater runoff from the decks and rainwater infiltrating through 0.7 m of sand below the decks was collected and analyzed for arsenic species by HPLC-ICP-MS. The average arsenic concentration in the runoff of the untreated deck was 2-3 μg/L, whereas from the CCA-treated deck it was 600 μg/L Both inorganic As(III) and As(V) were detected in the runoff from both decks, with inorganic As(V) predominating. No detectable levels of organoarsenic species were observed. The total arsenic concentration in the infiltrated water of the treated deck had risen from a background concentration of 3 μg/L to a concentration of 18 μg/L at the end of the study. Data from the deck study were combined with annual CCA-treated wood production statistics to develop a mass balance model to estimate the extent of arsenic leaching from in-service CCA-treated wood structures to Florida soils. Results showed that during the year 2000, of the 28 000 t of arsenic imported into the state and utilized for in-service CCA-treated wood products, approximately 4600 t had already leached. Future projections suggest that an additional 11 000 t of arsenic will leach during in-service use within the next 40 years.

Original languageEnglish
Pages (from-to)988-993
Number of pages6
JournalEnvironmental Science and Technology
Volume40
Issue number3
DOIs
StatePublished - Feb 1 2006

Fingerprint

Arsenic
arsenate
Leaching
arsenic
Wood
leaching
copper
Copper
Runoff
runoff
rainwater
Soils
Wood products
services
chromated copper arsenate
Rain
Groundwater
mass balance
Sand
soil

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Release of arsenic to the environment from CCA-treated wood. 1. Leaching and speciation during service. / Khan, Bernine I.; Solo-Gabriele, Helena M; Townsend, Timothy G.; Cai, Yong.

In: Environmental Science and Technology, Vol. 40, No. 3, 01.02.2006, p. 988-993.

Research output: Contribution to journalArticle

@article{151eda95066e4de5bf6a91d15a9d2a87,
title = "Release of arsenic to the environment from CCA-treated wood. 1. Leaching and speciation during service",
abstract = "Insufficient information exists about the speciation of arsenic leaching from in-service chromated copper arsenate (CCA)-treated products and the overall impact to soils and groundwater. To address this issue, two decks were constructed, one from CCA-treated wood and the other from untreated wood. Both decks were placed in the open environment where they were impacted by rainfall. Over a one-year period, rainwater runoff from the decks and rainwater infiltrating through 0.7 m of sand below the decks was collected and analyzed for arsenic species by HPLC-ICP-MS. The average arsenic concentration in the runoff of the untreated deck was 2-3 μg/L, whereas from the CCA-treated deck it was 600 μg/L Both inorganic As(III) and As(V) were detected in the runoff from both decks, with inorganic As(V) predominating. No detectable levels of organoarsenic species were observed. The total arsenic concentration in the infiltrated water of the treated deck had risen from a background concentration of 3 μg/L to a concentration of 18 μg/L at the end of the study. Data from the deck study were combined with annual CCA-treated wood production statistics to develop a mass balance model to estimate the extent of arsenic leaching from in-service CCA-treated wood structures to Florida soils. Results showed that during the year 2000, of the 28 000 t of arsenic imported into the state and utilized for in-service CCA-treated wood products, approximately 4600 t had already leached. Future projections suggest that an additional 11 000 t of arsenic will leach during in-service use within the next 40 years.",
author = "Khan, {Bernine I.} and Solo-Gabriele, {Helena M} and Townsend, {Timothy G.} and Yong Cai",
year = "2006",
month = "2",
day = "1",
doi = "10.1021/es0514702",
language = "English",
volume = "40",
pages = "988--993",
journal = "Environmental Science & Technology",
issn = "0013-936X",
publisher = "American Chemical Society",
number = "3",

}

TY - JOUR

T1 - Release of arsenic to the environment from CCA-treated wood. 1. Leaching and speciation during service

AU - Khan, Bernine I.

AU - Solo-Gabriele, Helena M

AU - Townsend, Timothy G.

AU - Cai, Yong

PY - 2006/2/1

Y1 - 2006/2/1

N2 - Insufficient information exists about the speciation of arsenic leaching from in-service chromated copper arsenate (CCA)-treated products and the overall impact to soils and groundwater. To address this issue, two decks were constructed, one from CCA-treated wood and the other from untreated wood. Both decks were placed in the open environment where they were impacted by rainfall. Over a one-year period, rainwater runoff from the decks and rainwater infiltrating through 0.7 m of sand below the decks was collected and analyzed for arsenic species by HPLC-ICP-MS. The average arsenic concentration in the runoff of the untreated deck was 2-3 μg/L, whereas from the CCA-treated deck it was 600 μg/L Both inorganic As(III) and As(V) were detected in the runoff from both decks, with inorganic As(V) predominating. No detectable levels of organoarsenic species were observed. The total arsenic concentration in the infiltrated water of the treated deck had risen from a background concentration of 3 μg/L to a concentration of 18 μg/L at the end of the study. Data from the deck study were combined with annual CCA-treated wood production statistics to develop a mass balance model to estimate the extent of arsenic leaching from in-service CCA-treated wood structures to Florida soils. Results showed that during the year 2000, of the 28 000 t of arsenic imported into the state and utilized for in-service CCA-treated wood products, approximately 4600 t had already leached. Future projections suggest that an additional 11 000 t of arsenic will leach during in-service use within the next 40 years.

AB - Insufficient information exists about the speciation of arsenic leaching from in-service chromated copper arsenate (CCA)-treated products and the overall impact to soils and groundwater. To address this issue, two decks were constructed, one from CCA-treated wood and the other from untreated wood. Both decks were placed in the open environment where they were impacted by rainfall. Over a one-year period, rainwater runoff from the decks and rainwater infiltrating through 0.7 m of sand below the decks was collected and analyzed for arsenic species by HPLC-ICP-MS. The average arsenic concentration in the runoff of the untreated deck was 2-3 μg/L, whereas from the CCA-treated deck it was 600 μg/L Both inorganic As(III) and As(V) were detected in the runoff from both decks, with inorganic As(V) predominating. No detectable levels of organoarsenic species were observed. The total arsenic concentration in the infiltrated water of the treated deck had risen from a background concentration of 3 μg/L to a concentration of 18 μg/L at the end of the study. Data from the deck study were combined with annual CCA-treated wood production statistics to develop a mass balance model to estimate the extent of arsenic leaching from in-service CCA-treated wood structures to Florida soils. Results showed that during the year 2000, of the 28 000 t of arsenic imported into the state and utilized for in-service CCA-treated wood products, approximately 4600 t had already leached. Future projections suggest that an additional 11 000 t of arsenic will leach during in-service use within the next 40 years.

UR - http://www.scopus.com/inward/record.url?scp=32344438820&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=32344438820&partnerID=8YFLogxK

U2 - 10.1021/es0514702

DO - 10.1021/es0514702

M3 - Article

VL - 40

SP - 988

EP - 993

JO - Environmental Science & Technology

JF - Environmental Science & Technology

SN - 0013-936X

IS - 3

ER -