丁基锡化合物在水体悬浮颗粒物上的吸附行为研究

将海河河口表层底泥制成悬浮颗粒物（ＳＰＭ），采用批量平衡法首次研究了模拟河口条件下三丁基锡（ＴＢＴ）和二丁基锡（ＤＢＴ）在该ＳＰＭ上的吸附行为．结果表明，ＴＢＴ和ＤＢＴ均能在ＳＰＭ上发生吸附，尤以ＴＢＴ更为显著．吸附速率可用Ｋｕｏ和Ｌａｋｅ的经验公式描述；吸附过程受ＳＰＭ的浓度及ＴＯＣ含量、ｐＨ值、温度、腐殖酸浓度和盐度影响．实际河口水样中的ＳＰＭ对ＴＢＴ和ＤＢＴ的吸附百分率也较高，因此ＳＰＭ是ＴＢＴ和ＤＢＴ归趋的重要场所，去除ＳＰＭ可使水体得到一定净化．

ADSORPTION BEHAVIOR OF BUTYLTIN COMPOUNDS OF SUSPENDED PARTICULATE MATTER IN WATER BODY

This paper reported for first time the adsorption behavior of butyltin compounds on the suspended particulate matter (SPM) under a simulated estuary condition by using batch equilibrium method.SPM is prepared by surface sediments from the Haihe estuary.The results showed that both TBT and DBT,especially TBT,can be adsorbed significantly on SPM.The adsorption rate may be expressed by the emeric equation of Kuo and Lake.The adsorption rate is influenced greater by the concentrations of SPM,TOC,humic acid,and temperature than by the salinity.APM in water sample taken from the estuary has even higher adsorption ability to TBT and DBT.This shows that SPM is an important sink to TBT and DBT and,consequently,the removal of SPM can purify water body to some extent.