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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.