Pilot scale evaluation of sorting technologies for CCA treated wood waste

Monika Blassino, Helena M Solo-Gabriele, Timothy Townsend

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Two sorting technologies including a chemical stain method and an x-ray fluorescence technique were investigated for separating chromated copper arsenate (CCA) treated wood from other wood types in the wood waste stream. Stains were investigated in both laboratory and field settings. Studies included specially mixed solutions with chrome azurol, 1-(2-pyridylazo)-2-naphthol (PAN) and rubeanic acid chemicals. X-ray fluorescence was tested in the laboratory using a commercially available x-ray fluorescence spectrometer. Laboratory scale experiments showed that both technologies were able to detect CCA treated wood in mixtures of treated wood and untreated wood, with detection limits on the order of 3 to 5% CCA. Results from field experiments at construction and demolition facilities indicate that although the chemical stains can be effectively used to identify CCA treated wood waste in field settings, their use will be limited to sorting relatively small wood waste piles due to increased labor and time needed for processing the wood waste. Operational parameters for sorting using x-ray fluorescence technology were established. These parameters concluded that arsenic was the most sensitive metal for analysis, analysis time was less than 2 seconds per wood sample, and the maximum separation distance between the sample and the x-ray probe was 2.5 cm. X-ray technology shows considerable promise for separating large quantities of CCA-treated wood from other wood types in the field using an on-line sorting system.

Original languageEnglish
Pages (from-to)290-301
Number of pages12
JournalWaste Management and Research
Volume20
Issue number3
StatePublished - Jul 14 2002

Fingerprint

Wood wastes
arsenate
Sorting
sorting
Wood
copper
Copper
X rays
Fluorescence
fluorescence
Naphthol
Demolition
wood waste
evaluation
demolition
chemical method
Arsenic
X-ray fluorescence
Piles
Spectrometers

Keywords

  • Arsenic
  • CCA
  • Chromium
  • Construction and demolition facility
  • Copper
  • Treated wood
  • wmr 362-4
  • Wood waste

ASJC Scopus subject areas

  • Waste Management and Disposal

Cite this

Pilot scale evaluation of sorting technologies for CCA treated wood waste. / Blassino, Monika; Solo-Gabriele, Helena M; Townsend, Timothy.

In: Waste Management and Research, Vol. 20, No. 3, 14.07.2002, p. 290-301.

Research output: Contribution to journalArticle

@article{8d42c9855da6490988faacd5b765d56c,
title = "Pilot scale evaluation of sorting technologies for CCA treated wood waste",
abstract = "Two sorting technologies including a chemical stain method and an x-ray fluorescence technique were investigated for separating chromated copper arsenate (CCA) treated wood from other wood types in the wood waste stream. Stains were investigated in both laboratory and field settings. Studies included specially mixed solutions with chrome azurol, 1-(2-pyridylazo)-2-naphthol (PAN) and rubeanic acid chemicals. X-ray fluorescence was tested in the laboratory using a commercially available x-ray fluorescence spectrometer. Laboratory scale experiments showed that both technologies were able to detect CCA treated wood in mixtures of treated wood and untreated wood, with detection limits on the order of 3 to 5{\%} CCA. Results from field experiments at construction and demolition facilities indicate that although the chemical stains can be effectively used to identify CCA treated wood waste in field settings, their use will be limited to sorting relatively small wood waste piles due to increased labor and time needed for processing the wood waste. Operational parameters for sorting using x-ray fluorescence technology were established. These parameters concluded that arsenic was the most sensitive metal for analysis, analysis time was less than 2 seconds per wood sample, and the maximum separation distance between the sample and the x-ray probe was 2.5 cm. X-ray technology shows considerable promise for separating large quantities of CCA-treated wood from other wood types in the field using an on-line sorting system.",
keywords = "Arsenic, CCA, Chromium, Construction and demolition facility, Copper, Treated wood, wmr 362-4, Wood waste",
author = "Monika Blassino and Solo-Gabriele, {Helena M} and Timothy Townsend",
year = "2002",
month = "7",
day = "14",
language = "English",
volume = "20",
pages = "290--301",
journal = "Waste Management and Research",
issn = "0734-242X",
publisher = "SAGE Publications Ltd",
number = "3",

}

TY - JOUR

T1 - Pilot scale evaluation of sorting technologies for CCA treated wood waste

AU - Blassino, Monika

AU - Solo-Gabriele, Helena M

AU - Townsend, Timothy

PY - 2002/7/14

Y1 - 2002/7/14

N2 - Two sorting technologies including a chemical stain method and an x-ray fluorescence technique were investigated for separating chromated copper arsenate (CCA) treated wood from other wood types in the wood waste stream. Stains were investigated in both laboratory and field settings. Studies included specially mixed solutions with chrome azurol, 1-(2-pyridylazo)-2-naphthol (PAN) and rubeanic acid chemicals. X-ray fluorescence was tested in the laboratory using a commercially available x-ray fluorescence spectrometer. Laboratory scale experiments showed that both technologies were able to detect CCA treated wood in mixtures of treated wood and untreated wood, with detection limits on the order of 3 to 5% CCA. Results from field experiments at construction and demolition facilities indicate that although the chemical stains can be effectively used to identify CCA treated wood waste in field settings, their use will be limited to sorting relatively small wood waste piles due to increased labor and time needed for processing the wood waste. Operational parameters for sorting using x-ray fluorescence technology were established. These parameters concluded that arsenic was the most sensitive metal for analysis, analysis time was less than 2 seconds per wood sample, and the maximum separation distance between the sample and the x-ray probe was 2.5 cm. X-ray technology shows considerable promise for separating large quantities of CCA-treated wood from other wood types in the field using an on-line sorting system.

AB - Two sorting technologies including a chemical stain method and an x-ray fluorescence technique were investigated for separating chromated copper arsenate (CCA) treated wood from other wood types in the wood waste stream. Stains were investigated in both laboratory and field settings. Studies included specially mixed solutions with chrome azurol, 1-(2-pyridylazo)-2-naphthol (PAN) and rubeanic acid chemicals. X-ray fluorescence was tested in the laboratory using a commercially available x-ray fluorescence spectrometer. Laboratory scale experiments showed that both technologies were able to detect CCA treated wood in mixtures of treated wood and untreated wood, with detection limits on the order of 3 to 5% CCA. Results from field experiments at construction and demolition facilities indicate that although the chemical stains can be effectively used to identify CCA treated wood waste in field settings, their use will be limited to sorting relatively small wood waste piles due to increased labor and time needed for processing the wood waste. Operational parameters for sorting using x-ray fluorescence technology were established. These parameters concluded that arsenic was the most sensitive metal for analysis, analysis time was less than 2 seconds per wood sample, and the maximum separation distance between the sample and the x-ray probe was 2.5 cm. X-ray technology shows considerable promise for separating large quantities of CCA-treated wood from other wood types in the field using an on-line sorting system.

KW - Arsenic

KW - CCA

KW - Chromium

KW - Construction and demolition facility

KW - Copper

KW - Treated wood

KW - wmr 362-4

KW - Wood waste

UR - http://www.scopus.com/inward/record.url?scp=0035992514&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035992514&partnerID=8YFLogxK

M3 - Article

VL - 20

SP - 290

EP - 301

JO - Waste Management and Research

JF - Waste Management and Research

SN - 0734-242X

IS - 3

ER -