Ball, James W

21 items:

Summary of synoptic sampling and tracer-injection tests in the Alamosa River Basin during low-flow conditions, October 1998: A sampling analysis report for modeling reactive transport of metals for the Summitville Mine, Colorado Categories: Publication; Types: Citation
Ammonium in thermal waters of Yellowstone National Park: Processes affecting speciation and isotope fractionation Dissolved inorganic nitrogen, largely in reduced form ( NH 4 ( T ) ≈ NH 4 ( aq ) + + NH 3 ( aq ) o ), has been documented in thermal waters throughout Yellowstone National Park, with concentrations ranging from a few micromolar along the Firehole River to millimolar concentrations at Washburn Hot Springs. Indirect evidence from rock nitrogen analyses and previous work on organic compounds associated with Washburn Hot Springs and the Mirror Plateau indicate multiple sources for thermal water NH4(T), including Mesozoic marine sedimentary rocks, Eocene lacustrine deposits, and glacial deposits. A positive correlation between NH4(T) concentration and δ18O of thermal water indicates that boiling is an important mechanism... Categories: Publication; Types: Citation
Summary of synoptic sampling and tracer-injection tests in the Alamosa River basin during high-flow conditions, June 1999: A sampling analysis report for modeling reactive transport of metals for the Summitville Mine, Colorado Categories: Publication; Types: Citation
Source and fate of inorganic solutes in the Gibbon River, Yellowstone National Park, Wyoming, USA. II. Trace element chemistry The Gibbon River in Yellowstone National Park receives inflows from several geothermal areas, and consequently the concentrations of many trace elements are elevated compared to rivers in non-geothermal watersheds. Water samples and discharge measurements were obtained from the Gibbon River and its major tributaries near Norris Geyser Basin under the low-flow conditions of September 2006 allowing for the identification of solute sources and their downstream fate. Norris Geyser Basin, and in particular Tantalus Creek, is the largest source of many trace elements (Al, As, B, Ba, Br, Cs, Hg, Li, Sb, Tl, W, and REEs) to the Gibbon River. The Chocolate Pots area is a major source of Fe and Mn, and the lower Gibbon River... Categories: Publication; Types: Citation; Tags: Arsenic, Gibbon River, Norris Geyser Basi, geothermal
A new cation-exchange method for accurate field speciation of hexavalent chromium A new method for field speciation of Cr(VI) has been developed to meet present stringent regulatory standards and to overcome the limitations of existing methods. The method consists of passing a water sample through strong acid cation-exchange resin at the field site, where Cr(III) is retained while Cr(VI) passes into the effluent and is preserved for later determination. The method is simple, rapid, portable, and accurate, and makes use of readily available, inexpensive materials. Cr(VI) concentrations are determined later in the laboratory using any elemental analysis instrument sufficiently sensitive to measure the Cr(VI) concentrations of interest. The new method allows measurement of Cr(VI) concentrations... Categories: Publication; Types: Citation; Tags: Analytical methods, Cation exchange, Hexavalent chro

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