摘要
测定了不同pH和盐度条件下三丁基锡 (TBT)在罗非鱼 (Tilapia)体内的生物富集系数 (BCF)及其在正辛醇 水体系的分配系数 (Kow)和人工合成生物膜 水体系的分配系数 (Dmw) ,并对其相关关系进行了探讨 .富集实验进行了 16 8h ,TBT在pH =8时的富集初始速率和 16 8hBCF明显高于pH =6时 ,pH6和 8时的BCF分别为 75 4 9和 1132 1.盐度对生物富集也存在较大影响 ,盐度为 0‰、15 0‰和 2 5 0‰时的BCF分别为 10 71 8、871 8和 2 76 6 .TBT的Kow和Dmw也表现为随pH升高而升高、随盐度升高而下降的趋势 ,但Dmw能更精确地预测TBT的BCF随环境条件的变化 .
Biocencentration factor (BCF)of tributyltin (TBT) in Tilapia and also its partition coefficients in n octanol water system( K ow )and in synthesized membrane water system ( D mw ) were determined under different pH and salinities, and relationship between the three coefficients was discussed. Biocencentration experiments lasted for 168?h, initial rate of bioconcentration and BCF were significantly greater at pH of 8 than at pH of 6 with 168?h BCF being 1132 1 at pH of 6 and 754 9 at pH of 8, respectively. Salinity also exerted great influence on bioconcentration of TBT in the fish, with 168?h BCF being 1071 8, 871 8 and 276 6 at salinity of 0 0‰, 15 0‰ and 25 0‰. K ow and D mw also increased with the increase of pH and decreased with the increase of salinity. However D mw can predict BCF of TBT under different condition more precisely.
出处
《环境科学学报》
CAS
CSCD
北大核心
2002年第6期726-731,共6页
Acta Scientiae Circumstantiae
基金
国家自然科学基金资助 (编号 :2 98770 13)
