ABSTRACT
Contamination by selenium (Se) is a signicant global issue (Lemly 2002). It has occurred in many types of aquatic environments, including estuaries, wetlands, freshwater streams, and impoundments (Cutter 1989; Leighton 1989; Atalay 1990). Selenium is a naturally occurring element that is enriched in a range of geological sources such as crustal rock, black shale, phosphate rocks, and coal. While natural sources of Se
4.3.5.2 (CH3)2Se and (CH3)2Se2 in Waters .......................................64 4.3.5.3 Selenium Speciation in Sediments .......................................64 4.3.5.4 Selenium Speciation in Biota ...............................................65
