Universität zu Köln

Mansfeldt, Tim ORCID: 0000-0002-7557-6827 and Hohener, Patrick ORCID: 0000-0002-4453-566X (2016). Isotopic Fingerprints of Iron Cyanide Complexes in the Environment. Environ. Sci. Technol., 50 (14). S. 7382 - 7389. WASHINGTON: AMER CHEMICAL SOC. ISSN 1520-5851

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Abstract

Tracing the origin of iron cyanide complexes in the environment is important because these compounds are potentially toxic. We determined the stable isotopic compositions of cyanide carbon (C-CN) and cyanide-nitrogen (N-CN) in 127 contaminated solids and 11 samples of contaminated groundwater from coal carbonization sites, blast furnace operations, and commercial cyanide applications. Coal-carbonization-related cyanides had unique high mean delta C-13(CN) values of -10.5 +/- 3.5 parts per thousand for the solids and -16.1 +/- 1.2 parts per thousand for the groundwater samples, while the values for blast furnace sludge (-26.9 +/- 1.5 parts per thousand), commercial cyanides (-26.0 +/- 3.0 parts per thousand), and their corresponding groundwaters were significantly lower. Determination of delta C-13(CN) is a promising tool for identifying the source of cyanide contamination. However, for coal carbonization sites, historical research into the manufacturing process is necessary because a nonconventional gas works site exhibited exceptionally low delta C-13(CN) values of -22.7 +/- 1.7 parts per thousand. The delta N-15(CN) values for samples related to coal carbonization and blast furnaces overlapped within a range of +0.1 to +10.3 parts per thousand, but very high delta N-15(CN) values seemed to be indicative for a cyanide source in the blast furnace. In contrast, commercial cyanides tend to have lower delta N-15(CN) values of -5.6 to +1.9 parts per thousand in solids and -0.5 to +3.0 parts per thousand in the groundwater.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Mansfeldt, Tim UNSPECIFIED orcid.org/0000-0002-7557-6827 UNSPECIFIED Hohener, Patrick UNSPECIFIED orcid.org/0000-0002-4453-566X UNSPECIFIED
URN:	urn:nbn:de:hbz:38-269754
DOI:	10.1021/acs.est.6b01565
Journal or Publication Title:	Environ. Sci. Technol.
Volume:	50
Number:	14
Page Range:	S. 7382 - 7389
Date:	2016
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1520-5851
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Geosciences > Geographisches Institut
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MANUFACTURED-GAS PLANTS; CONTAMINATED SOILS; WATER-QUALITY; STABLE CARBON; NITROGEN; COALS; IDENTIFICATION; FRACTIONATION; ABUNDANCE; WASTES Multiple languages Engineering, Environmental; Environmental Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26975