Analysis of polychlorinated dibenzo-p-dioxins and furans in various aqueous samples in Taiwan

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Title:	Analysis of polychlorinated dibenzo-p-dioxins and furans in various aqueous samples in Taiwan
Authors:	Thuan,NT;Tsai,CL;Weng,YM;Lee,TY;Chang,MB
Contributors:	環境工程研究所
Keywords:	SUSPENDED PARTICULATE MATTER;DRINKING-WATER TREATMENT;REMOVAL;PCDFS;PCDDS;PRECURSORS;HOMOLOG;RIVER;PCBS
Date:	2011
Issue Date:	2012-03-27 17:04:12 (UTC+8)
Publisher:	國立中央大學
Abstract:	Twenty-one fresh water samples were taken from reservoirs, wells and drinking water treatment plants in Taiwan for measurement of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) concentrations. Due to low concentration of PCDD/Fs, water samples (400-1000 L) were collected by using the on-site large volume pre-concentration system and analyzed by high resolution gas chromatography (HRGC)/high resolution mass spectrometer (HRMS). Different characteristics of dioxin profiles in surface water and groundwater are observed. The PCDD/F concentrations in fresh water samples varied from 0.001 to 0.265 pg WHO(98)-TEQ/L which are lower than the standard (12 pg WHO98-TEQ/L) set by the Taiwan Environmental Protection Administration (TEPA) for drinking water. Only a small fraction (< 5%) of the total PCDD/F concentration in fresh water samples was water-soluble. As a result of their hydrophobicity. PCDD/Fs are effectively removed along with suspended solid via the water treatment process (average 98% removal efficiency). (C) 2011 Elsevier Ltd. All rights reserved.
Relation:	CHEMOSPHERE
Appears in Collections:	[Graduate Institute of Environmental Engineering ] journal & Dissertation

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