Issues Relating To Sediment Toxicity Testing And Bioaccumulation Of Persistent Chemicals In SRS Sediments

WINONA, SPECHT

Savannah River Site (S.C.)

关键词: Testing;    Sediments;    Sulfides;    Solubility;    Water;   

DOI  :  10.2172/838803
RP-ID  :  WSRC-TR-2005-00069
RP-ID  :  AC09-96SR18500
RP-ID  :  838803

美国|英语

来源: UNT Digital Library

【 摘 要 】

Many chemical contaminants that enter a water body in an aqueous form are ultimately deposited to the sediments. Over time, the concentrations of contaminants in sediments may build up to concentrations that are much higher than those found in the water column. However, not all chemicals present in sediments are toxic/bioavailable. Factors that affect bioavailability include aqueous solubility, pH, redox, and composition of the sediment matrix (grain size, mineral constituents, organic matter), and for metals, the quantity of acid volatile sulfides that are present in the sediments. Many sediments contain multiple chemical contaminants, which may interact synergistically or antagonistically with respect to toxicity.