2005 Volume 59 Issue 4 Pages 246-256
Endocrine disruptors, such as dioxin and polychlorinated biphenyl (PCB), are affecting the development and reproduction of humans and animals, and are therefore, of major concern to the environment. In this work, separation of several endocrine disruptors from seawater and aqueous solutions has been investigated by pervaporation method and circulation method using hydrophobic tubes. The relationship between the separation factor of endocrine disruptors and their physical properties, i.e.saturated vapor pressure (Pvap) and hydrophobicity (logPow, octanol-water partition coefficient) in pervaporation was discussed.
The theoretical relationship between α (separation factor) and physical parameters (i.e., Pvap, and logPow.) hasbeen developed in this study as follows
The relationship between the separation factor of endocrinedisruptors and log Pow·Pvap (ED) based on the above theoretical equation showed a relative good relationship (γ=0.883) as theoretically predicted.
We also succeeded to remove endocrine disruptors by pervaporation of seawater and the circulation method using hydrophobic tubes at Enoshima Island. In summary, the concentration of endocrine disruptors in seawater can be analyzed very effectively by the circulation method using hydrophobic PDMS tubes, e.g., the concentration of dibuthylphthalate was around 50 ppb and that of dioctylphthalate was around 7 ppb at Enoshima Island.