Transient and quasi-steady-state dissolution of biotite at 22–25°C in high pH, sodium, nitrate, and aluminate solutions

Samson, Sherry D.; Nagy, Kathryn L.; Cotton, Worth B.

doi:10.1016/j.gca.2004.07.005

Cited by 32 publications

(23 citation statements)

References 54 publications

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“…Rates from all three studies follow the same general pattern with pH. Rates from the current study increase from steady-state to X = 30 mg to X = 15 mg. Rates from Malmström and Banwart (1997), except at low pH, most closely correspond with rates based on mass dissolved as do the Samson et al (2005) rates for pHs 7-9. The latter rates, as noted in the cited reference, had not reached steady state.…”

Section: Effects Of Phsupporting

confidence: 64%

“…1b) were at a minimum between pHs 8 and 11 (concentrations were below detection at pHs 5-8) and increased in both acidic and basic solutions; as with Si and Al, rates were highest at acidic pH values. Rates from Samson et al (2005) for pHs 10-14 are included for comparison.…”

Section: Effects Of Phmentioning

confidence: 99%

“…6; Table 5) are shown in Figure 2. Included for comparison are the 25C Si steadystate release rates from the current study along with rates from Samson et al (2005) for pHs 7-14 and Malmström and Banwart (1997) for pHs 2-10. Circled data points indicate experiments where < 30 mg was dissolved so time, t, was extrapolated from the available data.…”

Section: Effects Of Phmentioning

confidence: 99%

“…In the first manuscript (Samson et al, 2005) we established the dissolution rates at ambient temperature and over the basic pH range relative to the Hanford subsurface. The second manuscript in preparation is providing data that extends these rates to the full pH range and to temperatures that would be characteristic of the Hanford site both an on annual basis and as a result of heating from the radioactive wastes stored in the subsurface tanks.…”

mentioning

confidence: 99%

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DOE FG02-03ER63557: Final Technical Report: Reactivity of Primary Soil Minerals and Secondary Precipitates Beneath Leaking Hanford Waste Tanks

Nagy¹

2009

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Principal Investigator: Kathryn Nagy, klnagy@uic.edu, (312) 355-3276 Goals and ObjectivesThe purpose of the project was to investigate rates and mechanisms of reactions between primary sediment minerals and key components of waste tank solutions that leaked into the subsurface at the Hanford Site. Results were expected to enhance understanding of processes that cause (1) changes in porosity and permeability of the sediment and resultant changes in flow paths of the contaminant plumes, (2) formation of secondary precipitates that can take up contaminants in their structures, and (3) release of mineral components that can drive redox reactions affecting dissolved contaminant mobility. Measured rates can also be used directly in reactive transport models.Project tasks included (1) measurement of the dissolution rates of biotite mica from low to high pH and over a range of temperature relevant to the Hanford subsurface, (2) measurement of dissolution rates of quartz at high pH and in the presence of dissolved alumina, (3) measurement of the dissolution rates of plagioclase feldspar in high pH, high nitrate, high Al-bearing solutions characteristic of the BX tank farms, (4) incorporation of perrhenate in iron-oxide minerals as a function of pH, and (5) initiation of experiments to measure the formation of uranium(VI)-silicate phases under ambient conditions. Task 2 was started under a previous grant from the Environmental Management Science Program and Task 4 was partially supported by a grant to the PI from the Geosciences Program, Office of Basic Energy Sciences. Task 5 was continued under a subsequent grant from the Environmental Remediation Sciences Program, Office of Biological and Environmental Research.Summaries of the major results and products from each task are described below.

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Section: Effects Of Phsupporting

confidence: 64%

Section: Effects Of Phmentioning

confidence: 99%

Section: Effects Of Phmentioning

confidence: 99%

mentioning

confidence: 99%

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DOE FG02-03ER63557: Final Technical Report: Reactivity of Primary Soil Minerals and Secondary Precipitates Beneath Leaking Hanford Waste Tanks

Nagy¹

2009

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“…A study carried out by Khan (2014) has demonstrated the occurrence of biotite as an important mineral in the surface sediments of the study area. Muscovite and biotite dissolution and alterations have been investigated by many workers within acidic to alkaline pH region (Turpault & Trotignon, 1994;Samson et al, 2005). Fe (iii) hydroxides are forced to be derived from weathering of micas, iron sulfides and other primary Fe-bearing minerals (Polizzotto et al, 2006).…”

Section: Principle Component Analysis (Pca)mentioning

confidence: 99%

Groundwater Arsenic Contamination in Semi-Urban Areas of Tando Muhammad Khan District: A Case Study from Deltaic Flood Plain of Sindh, Pakistan

Khan¹,

Husain²,

Bakhtiari³

et al. 2017

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An attempt has been made to assess the arsenic contamination and role of anthropogenic activities on its release in the groundwater of alluvial aquifers occurring on deltaic flood plain of Indus River. Groundwater collected from three semi-urban union councils of Tando Muhammad Khan district revealed that the groundwater has bad quality for drinking which varied in the order of UC-2 > UC-1 > UC-3. Anoxia is prevalent in the aquifers of study area which is indicated by high HCO

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Preservation of Fe isotope heterogeneities during diagenesis and metamorphism of banded iron formation

Frost

Blanckenburg

Schoenberg

et al. 2006

Contrib Mineral Petrol

116

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We present the iron isotope composition of primary, diagenetic and metamorphic minerals in five samples from the contact metamorphosed Biwabik Iron Formation. These samples attained peak metamorphic temperatures of <200, <340,~500, <550, and <740°C respectively. d 56 Fe of bulk layers ranges from-0.8 to +0.8&; in some samples the layers may differ by >1& on the millimeter scale. Minerals in the lowest grade samples consistently show a sequence in which d 56 Fe of magnetite > silicate ‡ carbonate. The intermineral Fe isotope differences vary in a fashion that cannot be reconciled with theoretical temperaturedependent fractionation factors. Textural evidence reveals that most, if not all, magnetite in the Biwabik Formation is diagenetic, not primary, and that there was tremendous element mobility during diagenesis. The short duration of contact metamorphism allowed diagenetic magnetite compositions to be preserved throughout prograde metamorphism until at least the appearance of olivine. Magnetite compositions therefore act as an isotope record of the environment in which these sediments formed. Larger-scale fluid flow and longer timescales may allow equilibration of Fe isotopes in regionally metamorphosed rocks to lower temperatures than in contact metamorphic environments, but weakly regionally metamorphosed rocks may preserve small-scale Fe isotopic heterogeneities like those observed in the Biwabik Iron Formation. Importantly, Fe isotope compositions that are characteristic of chemical sedimentation or hydrothermal processes are preserved at low grade in the form of large inter-mineral variations, and at high grade in the form of unique bulk rock compositions. This observation confirms earlier work that has suggested that Fe isotopes can be used to identify sedimentary processes in the Precambrian rock record. Communicated by F. Poitrasson.

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Transient and quasi-steady-state dissolution of biotite at 22–25°C in high pH, sodium, nitrate, and aluminate solutions

Cited by 32 publications

References 54 publications

DOE FG02-03ER63557: Final Technical Report: Reactivity of Primary Soil Minerals and Secondary Precipitates Beneath Leaking Hanford Waste Tanks

DOE FG02-03ER63557: Final Technical Report: Reactivity of Primary Soil Minerals and Secondary Precipitates Beneath Leaking Hanford Waste Tanks

Groundwater Arsenic Contamination in Semi-Urban Areas of Tando Muhammad Khan District: A Case Study from Deltaic Flood Plain of Sindh, Pakistan

Preservation of Fe isotope heterogeneities during diagenesis and metamorphism of banded iron formation

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