Sulfur estuarine waters

Airey et al. [8] have described a method for removing sulfide prior to the determination of these anions in anoxic estuarine waters. Mercury(II) chloride was used to precipitate free sulfide from samples of anoxic water. The sulfide-free supernatant solution was used to estimate sulfide by measuring the concentration of unreacted mercury(II), as well as to determine sulfate, inorganic phosphate, and nitrate by spectrophotometric methods, in which sulfide interferes. Sulfide concentrations in the range 0.5-180 000 ig/l sulfur could be measured, while the lower limits for sulfate, ammonia, nitrite, and inorganic phosphate were 0.024, -1.0 and 1 xg/l, respectively. 

Surface Water, in estuarine water, the half-life of fenamiphos was 1.80 d (Lacorte et al, 1995). Chemical/Physical. Emits toxic fumes of phosphorus, nitrogen, and sulfur oxides when heated to decomposition (Lewis, 1990). 

Cycling of Inorganic and Organic Sulfur in Estuarine Waters... 

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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