Abstract
The purpose of this work was to characterize the Al chemistry along the longitudinal pH gradient of the Coxing Kill and thereby provide a basis for an in depth study of aluminum chemistry and transport as a function of pH. Water samples were collected along the pH gradient and analyzed for monomeric Al species, strong acid anions, base cations, ammonium, dissolved organic C and dissolved silica. Inorganic monomeric Al, organic momonmeric Al and dissolved organic C decreased in concentration as the stream's drainage area and pH increased. The ratio of organic to inorganic monomeric Al and the concentration of all other species increased with increasing pH. An abrupt change in stream chemistry occurred in conjunction with the gradual changes expected for a low order stream draining an acid sensitive watershed impacted by acid deposition. This abrupt change partially resulted from geological characteristics of the watershed.
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Shultz, A.M., Begemann, M.H., Schmidt, D.A. et al. Longitudinal trends in pH and aluminum chemistry of the Coxing Kill, Ulster County, New York. Water Air Soil Pollut 69, 113–125 (1993). https://doi.org/10.1007/BF00478352
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DOI: https://doi.org/10.1007/BF00478352