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Partitioning of polycyclic musk compounds in soil and aquatic environment—experimental determination of K$_{DOC}$

Content Provider	Springer Nature Link
Author	Böhm, Leonard Düring, Rolf Alexander
Copyright Year	2010
Abstract	Polycyclic musk compounds (PMC) are used as fragrances in cosmetics and detergents and enter rivers via domestic wastewater and sewage treatment plants. Soils can be contaminated by PMC through application of sewage sludge. Accumulation of PMC occurs in sediments and biota due to their persistence and lipophilicity. Dissolved organic matter (DOM) is of special relevance for their transport and behavior in the environment as it acts as solubilizer and carrier in aquatic and terrestrial systems. With the distribution coefficient K$_{DOC}$, one can predict their affinity to DOM. Different approaches exist to determine K$_{DOC}$, resulting in a range of coefficients for a number of organic pollutants. The objective of this study was to determine K$_{DOC}$ values for PMC using solid-phase microextraction (SPME).A method to determine K$_{DOC}$ was customized and applied to five PMC. Sorption was analyzed using different concentrations of humic acid (HA) solutions and headspace SPME coupled with GC/MS/MS. HA represented DOM. Regarding sorption in soils, sediments, and sewage sludge, a large concentration range of HA solutions up to 660 mg L$^{−1}$ dissolved organic carbon (DOC) was chosen. Simultaneous determination of all components in a mixture was compared to experiments with single compounds. The method was matched using pyrene.Determined log K$_{DOC}$ values were between 3.32 and 3.67. Compared to experiments with single compounds, determination of the components in a mixture showed no significant difference. Verification experiments with pyrene revealed a close match between K$_{DOC}$ determined in the current study and K$_{DOC}$ literature data. K$_{DOC}$ values of most economical and environmental important PMC 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta[g]-2-benzopyrane (HHCB) and 1-(5,6,7,8-tetrahydro-3,5,5,6,8,8-hexamethyl-2-naphthalenyl)-ethanone (AHTN) are comparable to but slightly lower than K$_{OC}$ values recently published. The greater K$_{DOC}$ for AHTN compared to the one of HHCB corresponds to greater amounts found in sediments. The large range in HA concentrations, allows for an assessment of PMC partitioning behavior in sewage treatment plants and soils contaminated with PMC.This method is applicable for semi-volatile substances. Since compounds have varying characteristics, this method has to be verified regarding specific parameters particularly kinetics. Suitability of this method should be tested for relevant PMC metabolites and to determine K$_{DOC}$ with natural organic matter from soils, rivers, sediments, and sewage sludge. This adapted method can be used to establish K$_{DOC}$ values for a variety of substances in a short amount of time and is applicable to environmental fate modeling and registration of chemicals.
Starting Page	708
Ending Page	713
Page Count	6
File Format	PDF
ISSN	14390108
Journal	Journal of Soils and Sediments
Volume Number	10
Issue Number	4
e-ISSN	16147480
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-02-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	ADBI AHDI AHTN ATII Dissolved organic matter Environmental fate Headspace solid-phase microextraction HHCB Pharmaceuticals and personal care products Sorption Environmental Physics Environment Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Stratigraphy Earth-Surface Processes

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