用片段常数法估算非极性有机化合物的生物富集因子  

A fragment constant method for estimation of bioconcentration factor of hydrophobic chemicals.

作　　者：胡海瑛[1] 陶澍[1] 卢晓霞[1] 习晓环[1] 

机构地区：[1]北京大学城市与环境学系,北京100871

出　　处：《中国环境科学》2000年第2期163-167,共5页China Environmental Science

基　　金：国家自然科学基金!49632062;国家杰出青年基金!4952510

摘　　要：根据１２１种ｌｏｇＫｏｗ（辛醇－水分配系数）值在１．４５～８．１９之间的非极性有机化合物在鱼体内生物富集因子（ＢＣＦ）的实测数据，建立了非极性有机化合物在鱼体中生物富集因子（ＢＣＦ的片段常数法估算模型．采用分类模型系数比较法对在分类模型中表现不同的同一个片段或结构因子重新确定划分原则，在此基础上模型得到进一步改进．最终模型的可换系数为０．９９３，平均误差为０２３９个对数单位．A fragment constant model was developed for the prediction of the bioconcentration factor (BCF) of hydropho- bic chemicals in fish, based on 121 experimental BCF Values. It was demonstrated that the model was successful for a variety of hydrophobic chemicals, the logKow of which range from 1.45 to 8.19 log-units. A method of category-based regression coefficient comparison was proposed to justify the identification of fragments and correction factors for the modeling. The coefficient of determination and mean residual error of the final model were 0.993 and 0.239 log-unit,re- spectively.

关 键 词：非级性 有机化合物 BCF 片段常数 生物监测 

分 类 号：X835.02[环境科学与工程—环境工程]