[Sorption behavior of PCB28 to phosphatidylcholine and triglyceride].

Sorption behaviors of PCB28 to phosphatidylcholine (PC)and triglyceride (TG) were studied. Results showed that sorption equilibrium could be achieved in 8 h for PCB28, and the sorption amount on PC was higher than that of TG when the initial PCB28 concentration is in the range of 50-250 microg x L(-1). As the initial PCB28 concentration increases, the absolute sorption amount and relative sorption amount on PC and TG enhances. And linear isotherm is suggested as the most appropriated fitting type, sorption constants K(d) calculated from linear isotherm for PC and TG are 38.84 L x g(-1) and 20.14 L x g(-1) respectively, which suggested that PC had a higher sorption ability to PCB28 than that of TG, and the fatty acid chain length might be important factors to influence the sorption mechanism of PC and TG.