Hydrocarbon humps in the marine environment: Synthesis, toxicity, and aqueous solubility of monoaromatic compounds

被引:20
作者
Smith, E [1 ]
Wraige, E [1 ]
Donkin, P [1 ]
Rowland, S [1 ]
机构
[1] Univ Plymouth, Dept Environm Sci, Plymouth Environm Res Ctr, Plymouth PL4 8AA, Devon, England
关键词
hump; hydrocarbons; solubility; alkyltetralins; unresolved complex mixtures;
D O I
10.1002/etc.5620201105
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A recent study has shown that some monoaromatic hydrocarbon constituents of the so-called unresolved complex mixtures (UCMs) or gas chromatographic humps, which are widespread in the marine environment, are toxic to the mussel Mytilus edulis. Here we describe the synthesis and toxicological assessment of 6-cyclohexyltetralin. 7-cyclohexyl-1-methyltetralin, and 7-cyclohexyl-1-n-propyltetralin, which contain structural features consistent with some monoaromatic UCM hydrocarbons. The compounds were all toxic to M. edulis when measured in the assay used previously to determine the toxicity of a monoaromatic UCM. The aqueous solubilities of the hydrocarbons in fresh and seawater at different temperatures were determined and found to range from about 10 to 110 mug/L (10-60 mug/L in seawater at 15 degreesC). Further studies of the aromatic UCM composition of a wide range of oils and oil residues are required to determine whether such alkylated compounds as 7-cyclohexyl-1-methyltetralin and 7-cyclohexyl-1-n-propyltetralin or their analogues are widespread in oils. If these aromatic compounds prove to be important in UCMs. toxicity experiments should be conducted with other biological end points and monitoring studies of pollutant hydrocarbons should probably include measurement of aromatic UCM hydrocarbons.
引用
收藏
页码:2428 / 2432
页数:5
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