Speciation of Triorganotin Compounds in Sediments using Mössbauer Spectroscopy;pp. 185-193
Authors: (Leopold May, George Eng, Department of Chemistry, The Catholic University of America, Washington, DC, and others)
Abstract: Speciation studies of various triorganotin compounds in sediments were made using Mössbauer spectroscopy. Aerobic and anaerobic sediment samples from waterways around the Washington DC metropolitan areas (Baltimore Harbor, Chesapeake Bay, Anacostia and Potomac Rivers) were spiked with various triorganotin compounds. The triorganotin compounds (tri-n-butyltins and triphenyltins) were those commonly incorporated into marine paints to prevent the formation of barnacles on ships and/or underwater structures. The tri-n-butyltins included tri-n-butyltin acetate, carbonate, chloride, fluoride, oxide, sulfate, and sulfide and the triphenyltin compounds included triphenyltin acetate, chloride, fluoride, and hydroxide. In addition, speciation of some spiked components of sediments such as sand and clays (illite, kaolinite, montmorillonite, and nontronite) was also evaluated. Salinity and pH studies indicated that these parameters did not play a major role in the speciation of the compounds. It is the intent that the review will provide the present state of knowledge and current trends for investigators in this field.