二丁基锡在水表面微层水中的吸附行为

ADSORPTIVE BEHAVIOR OF DIBUTYLTIN IN THE SURFACE MICROLAYER'S WATER

采用ＧＣ／ＡＡＳ联用系统研究了海河河口表面微层水中二氯化二丁基锡（ＤＢＴ）在悬浮物上的吸附行为．在低浓度下，其吸附基本符合Ｆｒｅｕｎｄｌｉｃｈ吸附等温线．对各种影响因素的研究表明，ｐＨ对ＤＢＴ的吸附有很大影响，在ｐＨ为６．０时悬浮物对其吸附最强；盐度对ＤＢＴ吸附有一定的影响，在盐度为７．５‰时悬浮物对其吸附最弱．另外，悬浮物浓度对ＤＢＴ的吸附也有重要影响．

This paper investigates the adsorptive behavior of dibutyltin dichloride (DBT) in the surface microlayer water sampled from Haihe estuary,Tianjin.Results from the adsorption isotherm indicate that DBT adsorption mechanism is rather complicated.pH has the most important effect on the sorption of DBT in the surface microlayer.When pH equals 6.0,the adsorption reaches the maximum;salinity has some effect on the adsorption and when it's about 7.5‰,the adsorption reaches the minimum.The suspended particulate was found to have an important effect on the adsorption as well.