Access Restriction

Author Sweden, At Äspö ♦ Bruton, Carol J. ♦ Viani, Brian E.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Hydrous Ferric Oxide ♦ Ion Sorption ♦ Major Element Fluid Chemistry ♦ Fluid Chemistry ♦ Sp Hard Rock Laboratory ♦ Ph-sensitive Source ♦ Observed Variability ♦ Hfo Surface ♦ Conservative Fluid Mixing Model ♦ Observed Discrepancy ♦ Shallow Hbh02 ♦ Geochemical Modeling ♦ Surface Complexation ♦ Deep Ka0483a Water ♦ Below-neutral Ph ♦ Surface Complexation Reaction ♦ Surface Chemistry ♦ Ion Exchange ♦ Carbonate Sorption
Abstract The observed variability of fluid chemistry at the sp Hard Rock Laboratory is not fully described by conservative fluid mixing models. Ion exchange may account for some of the observed discrepancies. It is also possible that variably charged solids such as oxyhydroxides of Fe can serve as sources and sinks of anions and cations through surface complexation. Surface complexation reactions on hydrous ferric oxides involve sorption of both cations and anions. Geochemical modeling of the surface chemistry of hydrous ferric oxides (HFOs) in equilibrium with shallow HBH02 and deep KA0483A waters shows that HFOs can serve as significant, pH-sensitive sources and sinks for cations and anions. Carbonate sorption is favored especially at below-neutral pH. A greater mass of carbonate is sorbed onto HFO surfaces than is contained in the fluid when 10 g goethite, used as a proxy for HFOs, is in contact with 1 kg H 2 O. The masses of sorbent required to significantly impact fluid chemistry through s...
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Publisher Date 1996-01-01