Novel evidence for natural formation of dioxins in ball clay.

Horii, Y., van Bavel, B., Kannan, K., Petrick, Gert, Nachtigall, Kerstin and Yamashita, N. (2007) Novel evidence for natural formation of dioxins in ball clay. Chemosphere, 70 (7). pp. 1280-1289. DOI 10.1016/j.chemosphere.2007.07.066.

[img] Text
Novel evidence for natural.pdf - Published Version
Restricted to Registered users only

Download (7Mb) | Contact

Supplementary data:

Abstract

Elevated concentrations of dioxins in ancient ball clay from the Mississippi Embayment suggest natural formation of dioxins in the environment. Evidence for such natural formation in ball clay derives from unique congener profiles in undisturbed ancient clay deposits and from the lack of other anthropogenic contaminants. Here we present novel evidence of natural formation of dioxins based on congener-specific carbon isotopic analysis of octachlorodibenzo-p-dioxin (OCDD) in ball clays from the USA and Japan. The analyses were performed using a combination of double-column high performance liquid chromatography clean-up and two-dimensional gas chromatography–isotope ratio mass spectrometry. Elevated concentrations of OCDD found in ball clays from the USA and Japan were isotopically distinguished from the anthropogenic source materials (fly ash and pentachlorophenol) and environmental samples (sediment and soil). The isotopic signatures and the occurrence of OCDD in ancient ball clays deposited in the Tertiary Era provide evidence for the in situ formation of dioxins.

Document Type: Article
Keywords: Stable carbon isotope; Octachlorodibenzo-p-dioxin; Kaolin; CSIA; Dioxin source; Pentachlorophenol; PCDD
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.chemosphere.2007.07.066
ISSN: 0045-6535
Date Deposited: 29 Apr 2009 10:07
Last Modified: 11 Dec 2017 11:34
URI: http://oceanrep.geomar.de/id/eprint/2271

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...