Sulfur salt marshes, speciation

Speciation of Dissolved Sulfur in Salt Marshes by Polarographlc Methods... 

Sulfur speciation In the porewaters of two salt marshes (Great Marsh, Delaware and Great Slppewlssett, Cape Cod, Massachusetts) are presented. A major finding Is that the porewaters from Great Slppewlssett salt marsh are dominated by Inorganic sulfur species throughout the depth profile. 

Various polarographic techniques have been successfully used to measure elemental sulfur, S , and sulfide (H2S and HS ) concentrations in laboratory solutions [116], salt water [117], saline lake [118], freshwater [119], lake porewaters [120], salt marsh sediments [109,120], and marine porewaters [121], Using stripping square wave voltammetry, researchers have been able to measure sulfide species at nanomolar concentrations [118-120, 122,123], Recently, cyclic and linear sweep voltammetries have been used to quantify elemental sulfur S , hydrogenosulfide (HS ) and polysulfides (S ) with fast scan rates (IV s ) [124] for example, in estuarine sediments (from Rehoboth Bay, an inland bay located in Delaware), the sulfur speciation was found to change throughout a core profile, with dominant in the top layers (0-6 cm), dominant... 

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