Geochemical processes controlling trace elemental mobility in coalbed natural gas (CBNG) disposal ponds in the Powder River Basin, WY

Reddy, K. J.; Helmericks, C.; Whitman, A.; Legg, D. E.

doi:10.1016/j.coal.2014.01.001

Cited by 5 publications

(6 citation statements)

References 15 publications

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“…These studies attributed decrease in barium concentrations in the disposal ponds to the precipitation of BaCO 3 (witherite). 24 However, disposal pond barium concentration increased in the TR basin at a rate of 14.6 mg per L per year. These trends differed with ndings of another study in the PRB.…”

Section: àmentioning

confidence: 99%

“…Since this species is an anion it could desorb from mineral surfaces (e.g., iron oxides or hydroxides), due to high pH, and become more soluble and mobile in alkaline environments such as the PRB. 24 Copper is another trace metal of environmental concern, although the trend analyses showed that copper concentrations were decreasing in the CBNG discharge points and disposal ponds across all basins. The trends for the discharge points showed a signicant year and basin interaction ( p ¼ 0.02, df ¼ 4.89, F ¼ 3.09) (Fig.…”

Section: àmentioning

confidence: 99%

“…Irrigation water with a high SAR will tend to replace calcium on soil exchange sites with sodium, thus reducing the fertility of the soil. Values for SAR are rated as low hazard (1-9), medium hazard (10)(11)(12)(13)(14)(15)(16)(17), high hazard (18)(19)(20)(21)(22)(23)(24)(25), and very high hazard ($26) (Table S2 †). The SAR values of the CBNG well water from the discharge points varied considerably (Table S3 †).…”

Section: Benecial Uses For Cbng Well Watermentioning

confidence: 99%

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Potential beneficial uses of coalbed natural gas (CBNG) water

Reddy

Whitman

Kniss

2014

Environ. Sci.: Processes Impacts

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The CBNG well water is typically managed by discharging into nearby disposal ponds. The CBNG well water could potentially be very useful in the water-limited regions (e.g., arid and semi-arid), but beneficial uses may be hindered by water quality problems. Objectives of this research were to: (1) examine trend analysis of nine years of CBNG well water at discharge (outfall) points and in corresponding disposal ponds, (2) evaluate geochemical processes, (3) identify potential water quality issues, and (4) find potential beneficial uses. The CBNG well water at discharge points and in corresponding disposal ponds was measured on-site for pH and electrical conductivity (EC). These water samples were also analyzed in the laboratory for calcium (Ca), sodium (Na), magnesium (Mg), potassium (K), iron (Fe), aluminum (Al), copper (Cu), arsenic (As), selenium (Se), cadmium (Cd), and barium (Ba). Total dissolved solids (TDS) were calculated from EC measurements. The sodium adsorption ratio (SAR) was calculated from Na, Ca, and Mg concentrations. Trend analyses of outfalls and disposal ponds were conducted separately so that the differences in trends could be compared. Trends in CBNG well water at discharge points are not always the same as trends in CBNG disposal ponds: environmental and geochemical processes play an important role in the water quality of these well waters. Overall trend analyses suggest that CBNG well water at discharge points in all basins of the Powder River Basin meets beneficial use criteria, except for SAR and to some extent EC, for aquatic life, livestock and wildlife watering, and irrigation. The CBNG well water in disposal ponds across all basins meets criteria for all beneficial uses except for As, pH, SAR, and to some extent EC for irrigation, aquatic life, and livestock and wildlife watering.

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Section: àmentioning

confidence: 99%

Section: àmentioning

confidence: 99%

Section: Benecial Uses For Cbng Well Watermentioning

confidence: 99%

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Potential beneficial uses of coalbed natural gas (CBNG) water

Reddy

Whitman

Kniss

2014

Environ. Sci.: Processes Impacts

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“…In the Powder River Basin of Wyoming, the main elements in coproduced water are Al, As, B, Ba, Cr, Cu, F, Fe, Mn, Mo, Se, Zn, Ni, Co, and Zn ,− during CBM production. However, the main elements are As, Cd, Co, Cr, Cu, Hg, Mo, Ni, Pb, Sb, Se, V, and Zn in Alberta, Canada.…”

Section: Introductionmentioning

confidence: 99%

Chemical Characteristics and Development Significance of Trace Elements in Produced Water with Coalbed Methane in Tiefa Basin

Tong

Huang

et al. 2019

ACS Omega

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Coalbed methane (CBM) is an unconventional natural gas resource. CBM mining releases a large amount of coproduced water, and the trace elements of CBM coproduced water can provide a basis for the exploration and development of CBM. The contents of eight major trace elements in the produced water from wellhead were tested and analyzed based on seven CBM wells in Tiefa Basin. The research indicates that Sr and Ba are the dominant trace elements with the highest concentrations in produced water. There is a positive correlation among Li, Sr, and Rb by cluster analysis and correlation analysis, which may be affected by the total dissolved solids and pH in the groundwater. The contents of Li, Sr, and Ba increase with the burial depth of coal seam and could be influenced by the fault. The gas production of CBM wells is affected by the depth of the coal seams, and there is no significant correlation between water production and the coal seam depth. However, faults have an important impact on gas and water production. The productivity of coalbed methane is affected by hydrogeological conditions and structure because the productivity of CBM wells located in different tectonic locations varies with the change of Li, Sr, and Ba contents.

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“…Most studies of CSG water quality focus on its inorganic composition, including salinity, high sodicity and trace metal occurrence [16][17][18][19][20][21][22][23][24][25]. For example, the vast majority of QLD CSG waters contain elevated Na + , HCO3 − and sometimes Cl − as the dominant ions, have fresh to brackish salinity (200-10,000 mg/L) and neutral to basic pH (pH 7-9) [6,26].…”

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confidence: 99%

Assessment of Geogenic Contaminants in Water Co-Produced with Coal Seam Gas Extraction in Queensland, Australia: Implications for Human Health Risk

et al. 2014

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Organic compounds in Australian coal seam gas produced water (CSG water) are poorly understood despite their environmental contamination potential. In this study, the presence of some organic substances is identified from government-held CSG water-quality data from the Bowen and Surat Basins, Queensland. These records revealed the presence of polycyclic aromatic hydrocarbons (PAHs) in 27% of samples of CSG water from the Walloon Coal Measures at concentrations <1 µg/L, and it is likely these compounds leached from in situ coals. PAHs identified from wells include naphthalene, phenanthrene, chrysene and dibenz [a,h]anthracene. In addition, the likelihood of coal-derived organic compounds leaching to groundwater is assessed by undertaking toxicity leaching experiments using coal rank and water chemistry as variables. These tests suggest higher molecular weight PAHs (including benzo[a]pyrene) leach from higher rank coals, whereas lower molecular weight PAHs leach at greater concentrations from lower rank coal. Some of the identified organic compounds have carcinogenic or health risk potential, but they are unlikely to be acutely toxic at the observed concentrations which are almost negligible (largely due to the hydrophobicity of such compounds). Hence, this study will be useful to practitioners assessing CSG water related environmental and health risk. OPEN ACCESSGeosciences 2014, 4 220

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Geochemical processes controlling trace elemental mobility in coalbed natural gas (CBNG) disposal ponds in the Powder River Basin, WY

Cited by 5 publications

References 15 publications

Potential beneficial uses of coalbed natural gas (CBNG) water

Potential beneficial uses of coalbed natural gas (CBNG) water

Chemical Characteristics and Development Significance of Trace Elements in Produced Water with Coalbed Methane in Tiefa Basin

Assessment of Geogenic Contaminants in Water Co-Produced with Coal Seam Gas Extraction in Queensland, Australia: Implications for Human Health Risk

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