摘要: Interaction of hydrophobic contaminants with natural dissolved organic material or particulate material plays a major role in contaminant distribution and bioavailability in the aquatic environment. For non-polar organic compounds the binding affinity is generally directly related to the hydrophobicity of the contaminant and the organic content of a sorbent such as particles. However, partitioning and bioaccumulation studies indicate that contaminant sorption and bioavailability may also be affected by different forms of organic carbon. Partitioning between water and particles has been described in multi kinetic processes that appear as two differentially bioavailable pools: one in a reversible pool and another in a resistant pool. The fraction of contaminant that resides in each of these pools changes, depending upon the sorption duration. During this equilibration phase, contaminant bioavailability can also be expected to …