Preservative leaching from chromated copper arsenate (CCA) treated timber to the soil enviroment

Wood has been used for centuries as building materials and the concern of le~ching of toxic elements into the soils and groundwater arise when Chromated Copper Arsenate (CCA) wood preservatives were used to extend the service life of timbers in soil contact against decay and termites infestation. In...

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Main Author:	Chin, Willy Siaw Min
Format:	Thesis
Language:	English
Published:	2013
Subjects:	GE Environmental Sciences
Online Access:	http://ir.unimas.my/id/eprint/10143/1/Willy%20Chin%20Siaw%20Min%20ft.pdf
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id	my-unimas-ir.10143
record_format	uketd_dc
spelling	my-unimas-ir.101432023-05-05T06:59:17Z Preservative leaching from chromated copper arsenate (CCA) treated timber to the soil enviroment 2013 Chin, Willy Siaw Min GE Environmental Sciences Wood has been used for centuries as building materials and the concern of le~ching of toxic elements into the soils and groundwater arise when Chromated Copper Arsenate (CCA) wood preservatives were used to extend the service life of timbers in soil contact against decay and termites infestation. In this study, the levels of total copper, chromium and arsenic within CCAtreated poles and in soils surrounding the poles in service at a plot in Timber Research and Technical Training Centre, Kuching, Sarawak, Malaysia since 1980 or 1981, were investigated There are significant decreases of CCA salt retention in poles after 30 years of weathering (p<0.05) but with insignificant differences (p>0.05) between retention of CCA salt in wood 1300 mm above ground level and 0-20 mm below ground level. The levels of these elements were found to be significantly elevated compared to control sites (background level) in soils immediately adjacent to the treated poles. The metal levels were highest at the soil surface in contact with the poles but decreased with distance and depth. Mean extractable arsenic levels ranged from 14.53 up to 100.06 mg/kg, chromium levels from 23.31 to 148.32 mg/kg and mean copper levels from 21.83 to 104.72 mg/kg. The results show that the soil is contaminated, albeit slightly, after 30 years exposure of CCA treated wood in ground contact. Universiti Malaysia Sarawak, (UNIMAS) 2013 Thesis http://ir.unimas.my/id/eprint/10143/ http://ir.unimas.my/id/eprint/10143/1/Willy%20Chin%20Siaw%20Min%20ft.pdf text en validuser masters Universiti Malaysia Sarawak, UNIMAS Faculty of Resource Science and Technology.
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English
topic	GE Environmental Sciences
spellingShingle	GE Environmental Sciences Chin, Willy Siaw Min Preservative leaching from chromated copper arsenate (CCA) treated timber to the soil enviroment
description	Wood has been used for centuries as building materials and the concern of le~ching of toxic elements into the soils and groundwater arise when Chromated Copper Arsenate (CCA) wood preservatives were used to extend the service life of timbers in soil contact against decay and termites infestation. In this study, the levels of total copper, chromium and arsenic within CCAtreated poles and in soils surrounding the poles in service at a plot in Timber Research and Technical Training Centre, Kuching, Sarawak, Malaysia since 1980 or 1981, were investigated There are significant decreases of CCA salt retention in poles after 30 years of weathering (p<0.05) but with insignificant differences (p>0.05) between retention of CCA salt in wood 1300 mm above ground level and 0-20 mm below ground level. The levels of these elements were found to be significantly elevated compared to control sites (background level) in soils immediately adjacent to the treated poles. The metal levels were highest at the soil surface in contact with the poles but decreased with distance and depth. Mean extractable arsenic levels ranged from 14.53 up to 100.06 mg/kg, chromium levels from 23.31 to 148.32 mg/kg and mean copper levels from 21.83 to 104.72 mg/kg. The results show that the soil is contaminated, albeit slightly, after 30 years exposure of CCA treated wood in ground contact.
format	Thesis
qualification_level	Master's degree
author	Chin, Willy Siaw Min
author_facet	Chin, Willy Siaw Min
author_sort	Chin, Willy Siaw Min
title	Preservative leaching from chromated copper arsenate (CCA) treated timber to the soil enviroment
title_short	Preservative leaching from chromated copper arsenate (CCA) treated timber to the soil enviroment
title_full	Preservative leaching from chromated copper arsenate (CCA) treated timber to the soil enviroment
title_fullStr	Preservative leaching from chromated copper arsenate (CCA) treated timber to the soil enviroment
title_full_unstemmed	Preservative leaching from chromated copper arsenate (CCA) treated timber to the soil enviroment
title_sort	preservative leaching from chromated copper arsenate (cca) treated timber to the soil enviroment
granting_institution	Universiti Malaysia Sarawak, UNIMAS
granting_department	Faculty of Resource Science and Technology.
publishDate	2013
url	http://ir.unimas.my/id/eprint/10143/1/Willy%20Chin%20Siaw%20Min%20ft.pdf
_version_	1783728014446559232

Preservative leaching from chromated copper arsenate (CCA) treated timber to the soil enviroment

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