Toxic substances from coal combustion - A comprehensive assessment, phase II: Element modes of occurrence for the Ohio 5/6/7, Wyodak, and North Dakota coal samples

Kolker, Allan; Mroczkowski, S.; Palmer, Colin A.; Dennen, Kristen O.; Finkelman, Robert B.; Bullock, John H.

doi:10.3133/ofr02224

Cited by 13 publications

(14 citation statements)

References 4 publications

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“…The partitioning of As in coal also supports the belief that As substitutes in autogenously generated pyrite (Finkelman, 1981;Kolker et al, 2002), and that, at most, only about 15% resides in coexisting silicates in coal. A significant concentration of As is, however, associated with organic matter probably complexed with thiol functional groups (Table 3.3).…”

Section: Fig 33supporting

confidence: 53%

“…The Unites States Geological Survey recently conducted a comprehensive multi-element characterization of selected coals (Kolker et al, 2002). This study is invaluable in providing a qualitative basis for geochemical model development for the present project.…”

Section: +2mentioning

confidence: 99%

“…However, extensive studies have been undertaken over many years to characterize the distributions of such constituents in the various mineral components of coals-e.g., see Finkelman (1981) and Kolker et al (2002). The reason for such an interest is that many trace elements are environmentally hazardous, and potential coal pretreatment processes to minimize their release to the atmosphere following combustion is of more than passing interest.…”

Section: +2mentioning

confidence: 99%

“…In the following paragraphs, we make reference to the information taken from Kolker et al (2002) and from Huerta-Diaz and Morse (1992) in discussions of the likely behavior of each selected hazardous inorganic constituent as it relates to solid solution substitution in pyrite or to the formation of discrete phases forming separately from co-existing pyrite. While reactive transport modeling in Section 4 is applied with a focus on Pb and As, we provide here a summary evaluation of the behavior of several other potentially relevant hazardous inorganic constituents.…”

Section: Fig 33mentioning

confidence: 99%

“…For comparison, the star illustrates the Gulf Coast Lithic Arkose described in Xu et al (2005) Tables Table 3.1. Characteristics (in weight percent, dry basis) of coals studied by Kolker et al (2002 …”

Section: Modification and Augmentation Of The Thermodynamic Data Suppmentioning

confidence: 99%

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Research Project on CO2 Geological Storage and Groundwater Resources: Water Quality Effects Caused by CO2 Intrusion into Shallow Groundwater

Birkhölzer¹,

Apps²,

Zheng³

et al. 2008

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Section: Fig 33supporting

confidence: 53%

Section: +2mentioning

confidence: 99%

Section: +2mentioning

confidence: 99%

Section: Fig 33mentioning

confidence: 99%

Section: Modification and Augmentation Of The Thermodynamic Data Suppmentioning

confidence: 99%

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Research Project on CO2 Geological Storage and Groundwater Resources: Water Quality Effects Caused by CO2 Intrusion into Shallow Groundwater

Birkhölzer¹,

Apps²,

Zheng³

et al. 2008

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Evaluation of Potential Changes in Groundwater Quality in Response to CO2 Leakage from Deep Geologic Storage

et al. 2010

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Concern has been expressed that carbon dioxide (CO 2 ) leaking from deep geological storage could adversely impact water quality in overlying potable aquifers by mobilizing hazardous trace elements. In this article, we present a systematic evaluation of the possible water quality changes in response to CO 2 intrusion into aquifers currently used as sources of potable water in the United States. The evaluation was done in three parts. First, we developed a comprehensive geochemical model of aquifers throughout the United States, evaluating the initial aqueous abundances, distributions, and modes of occurrence of selected hazardous trace elements in a large number of potable groundwater quality analyses from the National Water Information System (NWIS) database. For each analysis, we calculated the saturation indices (SIs) of several minerals containing these trace elements. The minerals were initially selected through literature surveys to establish whether field evidence supported their postulated presence in potable water aquifers. Mineral assemblages meeting the criterion of thermodynamic saturation were assumed to control the aqueous concentrations of the hazardous elements at initial system state as well as at elevated CO 2 concentrations caused by the ingress of leaking CO 2 . In the second step, to determine those hazardous trace elements of greatest concern in the case of CO 2 leakage, we conducted thermodynamic calculations to predict the impact of increasing CO 2 partial pressures on the solubilities of the identified trace element mineral hosts. Under reducing conditions characteristic of many groundwaters, the trace elements of greatest concern are arsenic (As) and lead (Pb). In the final step, a series of reactive-transport simulations was performed to investigate the chemical evolution of aqueous As and Pb after the intrusion of CO 2 from a storage reservoir into a shallow confined groundwater resource. Results from the reactive-transport model suggest that a significant increase of aqueous As and Pb concentrations may occur in response to CO 2 intrusion, but that the maximum concentration values remain below or close to specified maximum contaminant levels (MCLs). Adsorption/desorption from mineral surfaces may strongly impact the mobilization of As and Pb.

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Mercury in coal and the impact of coal quality on mercury emissions from combustion systems

Kolker

Senior

Quick

2006

Applied Geochemistry

124

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Toxic substances from coal combustion - A comprehensive assessment, phase II: Element modes of occurrence for the Ohio 5/6/7, Wyodak, and North Dakota coal samples

Cited by 13 publications

References 4 publications

Research Project on CO2 Geological Storage and Groundwater Resources: Water Quality Effects Caused by CO2 Intrusion into Shallow Groundwater

Research Project on CO2 Geological Storage and Groundwater Resources: Water Quality Effects Caused by CO2 Intrusion into Shallow Groundwater

Evaluation of Potential Changes in Groundwater Quality in Response to CO2 Leakage from Deep Geologic Storage

Mercury in coal and the impact of coal quality on mercury emissions from combustion systems

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