Commercial linear alkylbenzene sulfonate (LAS), mixture of alkylchain lengths and phenyl position isomers (C10-C13), is widely used as a major constituent of household and industrial detergents in the People’s Republ...Commercial linear alkylbenzene sulfonate (LAS), mixture of alkylchain lengths and phenyl position isomers (C10-C13), is widely used as a major constituent of household and industrial detergents in the People’s Republic of China. Degradation process and behaviour of LAS compounds during an 82-hour lake water die-away study, with an added LAS concentration of 1. 5mg .L-1, was quantified and accomplished by HPLO-UV after extractionon the SepPek C18 reversed - phase cartridges. The degradation rate became progressively faster with increasing chain length. The technique described in this study is fast, sensitive and specific, and can be used to determine low levels, of LAS and for establishing water quality criteria and standards relating to LAS and its compounds.展开更多
The leaching behaviors of enrofloxacin （ENR）, a fluoroquinolone group antibiotic, in three different standard soils, namely sandy, loamy sand and sandy loam were investigated according to OECD guideline 312. In addi...The leaching behaviors of enrofloxacin （ENR）, a fluoroquinolone group antibiotic, in three different standard soils, namely sandy, loamy sand and sandy loam were investigated according to OECD guideline 312. In addition, the effects of tenside, sodium dodecylbenzenesulfonate （DBS） on the mobility of ENR in two different soils were studied. The mobility of ENR in all three standard soils was very similar and was mostly （98%） concentrated on the top 0-5 cm segment of the soils at pH 5.7. The DBS can enhance the mobility of ENR in soils but the impact was in general negligible under the studied conditions.展开更多
文摘Commercial linear alkylbenzene sulfonate (LAS), mixture of alkylchain lengths and phenyl position isomers (C10-C13), is widely used as a major constituent of household and industrial detergents in the People’s Republic of China. Degradation process and behaviour of LAS compounds during an 82-hour lake water die-away study, with an added LAS concentration of 1. 5mg .L-1, was quantified and accomplished by HPLO-UV after extractionon the SepPek C18 reversed - phase cartridges. The degradation rate became progressively faster with increasing chain length. The technique described in this study is fast, sensitive and specific, and can be used to determine low levels, of LAS and for establishing water quality criteria and standards relating to LAS and its compounds.
基金supported by the German Federal Ministry of Education and Research (BMBF)by the National Natural Science Foundation of China (No. 50921064, CHN 04/010)
文摘The leaching behaviors of enrofloxacin （ENR）, a fluoroquinolone group antibiotic, in three different standard soils, namely sandy, loamy sand and sandy loam were investigated according to OECD guideline 312. In addition, the effects of tenside, sodium dodecylbenzenesulfonate （DBS） on the mobility of ENR in two different soils were studied. The mobility of ENR in all three standard soils was very similar and was mostly （98%） concentrated on the top 0-5 cm segment of the soils at pH 5.7. The DBS can enhance the mobility of ENR in soils but the impact was in general negligible under the studied conditions.
