水環境中におけるABSの組成変化 Variation of LAS composition in aquatic environments
Linear alkylbenzene sulfonates (LAS) in surface waters of the Tama River and estuaries of rivers which discharge into the Tokyo Bay and the Tokyo Bay were determined by combined gas-liquid chromatography-mass spectrometry. The compositions of LAS homologues in the aquatic environments were compared. The composition of LAS varied among commercial detergents, the river and estuary waters and the bay water. The proportion of LAS in the river waters were higher than those in the commercial detergents for C<sub>10</sub> and C<sub>11</sub> LAS, and were lower for C<sub>12</sub> and C<sub>13</sub> LAS. The compositions of LAS in the estuary waters were similar to those in the river waters. On the other hand, the proportions of C<sub>10</sub> and C<sub>11</sub> LAS in the bay water were low, and those of C<sub>12</sub> and C<sub>13</sub> LAS were high compared with those in the river and estuary waters. The factor effecting the variation in the LAS composition among the aquatic environments is discussed on the basis of the results of the laboratory experiments of the biodegradation and the adsorption of LAS.
地球化学 13(2), 51-55, 1980