Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.chemosphere.2007.03.051
Title: Selected organochlorine pesticide and polychlorinated biphenyl residues in house dust in Singapore
Authors: Tan, J.
Cheng, S.M.
Loganath, A. 
Chong, Y.S. 
Obbard, J.P. 
Keywords: Follow-up study
House dust
Organochlorine pesticides
Organochlorines
Polychlorinated biphenyls
Singapore
Issue Date: 2007
Source: Tan, J., Cheng, S.M., Loganath, A., Chong, Y.S., Obbard, J.P. (2007). Selected organochlorine pesticide and polychlorinated biphenyl residues in house dust in Singapore. Chemosphere 68 (9) : 1675-1682. ScholarBank@NUS Repository. https://doi.org/10.1016/j.chemosphere.2007.03.051
Abstract: Although the use of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) has been prohibited in Singapore since 1980, OCPs and PCBs still can be detected in the environment and represent a potential threat to public health. In this study, OCPs and PCBs were measured in house dust samples collected from 31 homes across the island-state of Singapore. Organochlorine pesticides, such as hexachlorocyclohexanes (HCHs), chlordanes and dichlorodiphenyltrichloroethanes (DDTs) were tested, with a range of <LOD to 240 ng g-1 dust, <LOD to 110 ng g-1 dust and <LOD to 770 ng g-1 dust, respectively. Of 41 target PCB congeners measured, 28 were detected, and the median level of ∑PCBs was 5.6 ng g-1 dust. The prevalence of these pesticides and industrial chemicals which have been banned many years ago suggests limited indoor degradation and on-going environmental accumulation. Weak negative correlations between an increased elevation of the residence and the concentration of DDTs and some low-chlorinated PCB congeners were noted, most likely due to increased ventilation and distance from ground-based sources at higher floors. Levels detected in several studies conducted in the USA were several orders of magnitude higher than concentrations observed in Singapore. Heavier use of chlorinated products in the USA, as well as different sampling methods, sampling time and site characteristics are likely explanations for the observed differences. Daily human intake of OCPs and PCBs via house dust was calculated, but values were low compared with dietary data from overseas. Ingestion of dust is indeed an exposure passway for these organochlorines, but may not be the predominant one. © 2007 Elsevier Ltd. All rights reserved.
Source Title: Chemosphere
URI: http://scholarbank.nus.edu.sg/handle/10635/26106
ISSN: 00456535
DOI: 10.1016/j.chemosphere.2007.03.051
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

35
checked on Dec 5, 2017

WEB OF SCIENCETM
Citations

32
checked on Dec 5, 2017

Page view(s)

259
checked on Dec 11, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.