Bioconcentration of Tetrachlorobenzyltoluenes TCBTs

Recently van Haelst et al. [241, 242] have determined the bioconcentration factors of single TCBT isomers in zebra mussels Dreissena polymorpha ) and in adult female guppies (Poecilia reticulata). The bioconcentration factors on a wet weight basis (BCF ) and on a lipid basis (BCFl) of eight tetrachlorobenzyltoluenes (TCBTs) isomers in mussels are compiled in Table 14. The melting points, water solubilities, and the n-octanol/water partition coefficients (log 

Kq ) of the investigated TCBTs are presented also in Table 14. The BCF values of TCBTs isomers in the mussels ranged from ca. 27,000 to 154,900 and the BCFl values ranged from ca. 620,000 to 3,560,000. 

Nomenclature and numbering according to Ehmann and Ballschmiter [235] and in order of elution. 

Water solubility determined by the generator column method by van Haelst et al. [244]. n-Octanol/water partition coefficients determined by Van Haelst et al. using the slow stirring method [245]. 

Mean steady-state bioconcentration factors on a wet weight basis of two independent tests with zebra mussels from Van Haelst et al. [242]. 

---