Table 4.16 

 Sorption and Desorption Coefficients for Tributyltin 

 in 1/kg for Chesapeake Bay Sediments. 



Sediment Type 



Ksorpt 



ion 



Fine grained detritus, 



3 



high in organics 8.2 x 10 



-» 

 Silt, high in organics 1.3 x 10 



•5 



Sand, moderate organics 0.60 x 10~ 



Coarse sand, low in 



organics 0.11 x 10~ 



Kdesorpt 



ion 



7.8 x 10- 



1.3 x 10 : 



0.11 x 10" 



Koc 



2.0 X 10- 

 4.5 X 10 4 

 1.8 X 10 £ 



1.2 X 10^ 



Source: Unger et al., 1987. 



Table 4.17 



Partitioning Coefficients (in ug/kg/ug/1) for 



Butyltin Compounds Between Sediments and Water. 



Station 



Compound 



Month 



Kp 



Month 



*P 



MERL 



TBT 

 DBT 

 MBT 

 TBT 

 DBT 

 MBT 

 TBT 

 DBT 



February 



February 



July 



24,706 



7,027 



28,750 



14,821 



2,069 



1,758 



4.0 X 10 4 



4.5 X 10 2 



May 



May 



55,439 

 26,087 

 11,346 



6,250 

 10,714 



3,878 



Source: Stang and Seligman, 1987. 



IV-37 



