Solubility of methane in distilled water and seawater

Yamamoto, Sachio; Alcauskas, James B.; Crozier, Thomas E.

doi:10.1021/je60068a029

Cited by 647 publications

(418 citation statements)

References 8 publications

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“…The partial pressures of the gases were determined by gas chromatography (Carlo Erba Model 8000, Rodano, ltaly) on a HayeSep D column (length 1.8 m, inner diameter 3.2 mm; Alltech Inc., Deerfield, Illinois, U.S.A.) at 70°C with N 2 as carrier (flow 19 ml min-1 ) and a Carlo Erba thermal conductivity detector (220°C). Concentrations of dissolved gases were calculated from Henry's law and the following Henry constants corrected for 12°C: N 2 O: 0.0374 M atm-1 (Weiss and Price, 1980) and CH 4 : 0.00177 M atm-1 (Yamamoto et al, 1976). Alkalinity was measured by potentiometric titration using Gran plots for graphical determination of the end point (Almgren et al, 1983).…”

Section: Chemicals and Analytical Methodsmentioning

confidence: 99%

Bioremediation of a diesel fuel contaminated aquifer: simulation studies in laboratory aquifer columns

Hess

Höhener

Hunkeler

et al. 1996

Journal of Contaminant Hydrology

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The in situ bioremediation of aquifers contaminated with petroleum hydrocarbons is commonly based on the infiltration of groundwater supplemented with oxidants (e.g., 0 2 , N0 3 ) and nutrients (e.g., NH1, Pol-). These additions stimulate the microbial activity in the aquifer and several field studies describing the resulting processes have been published. However, due to the heterogeneity of the subsurface and due to the limited number of observation wells usually available, these field data do not offer a sufficient spatial and temporal resolution. In this study, flow-through columns of 47-cm length equipped with 17 sampling ports were filled with homogeneously contaminated aquifer material from a diesel fuel contaminated in situ bioremedia tion site. The columns were operated over 96 days at 12°C with artificial groundwater supple mented with 0 2 , N0 3 and POJ-. Concentration profiles of 0 2 , N0 3 , N0 2 , dissolved inorganic and organic carbon (DIC and DOC, respectively), protein, microbial cells and total residual hydrocarbons were measured. Within the first 12 cm, corresponding to a mean groundwater residence time of < 3.6 h, a steep 0 2 decrease from 4.6 to < 0.3 mg 1-1 , denitrification, a production of DIC and DOC, high microbial cell numbers and a high removal of hydrocarbons were observed. Within a distance of 24 to 40.5 cm from the infiltration, 0 2 was below 0.1 mg 1-1 and a denitrifying activity was found. In the presence and in the absence of 0 2 , n-alkanes were preferentially degraded compared to branched alkanes. The results demonstrate that: (1) infiltra tion of aerobic groundwater into columns filled with aquifer material contaminated with hydrocar bons leads to a rapid depletion of 0 2 ; (2) 0 2 and N0 3 can serve as oxidants for the mineralization of hydrocarbons; and (3) the modelling of redox processes in aquifers has to consider denitrifying activity in presence of 0 2 . ' Corresponding author.

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Section: Chemicals and Analytical Methodsmentioning

confidence: 99%

Bioremediation of a diesel fuel contaminated aquifer: simulation studies in laboratory aquifer columns

Hess

Höhener

Hunkeler

et al. 1996

Journal of Contaminant Hydrology

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“…At all stations, CH 4 samples were obtained in duplicate and the overall reproducibility of CH 4 concentration measurements was better than ±5%. Dissolved CH 4 concentration was calculated with the solubility coefficient of Yamamoto et al (1976). Salinity and water temperature were measured in situ using a portable thermosalinometer (WTW Cond-340) with a precision of ±0.1 and ±0.1°C, respectively.…”

Section: Description Of Study Areamentioning

confidence: 99%

Seasonal variability of methane in the rivers and lagoons of Ivory Coast (West Africa)

et al. 2010

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We report a data-set of dissolved methane (CH 4 ) in three rivers (Comoé, Bia and Tanoé) and five lagoons (Grand-Lahou, Ebrié, Potou, Aby and Tendo) of Ivory Coast (West Africa), during the four main climatic seasons (high dry season, high rainy season, low dry season and low rainy season). The surface waters of the three rivers were over-saturated in CH 4 with respect to atmospheric equilibrium (2221-38719%), and the seasonal variability of CH 4 seemed to be largely controlled by dilution during the flooding period. The strong correlation of CH 4 concentrations with the partial pressure of CO 2 (pCO 2 ) and dissolved silicate (DSi) confirm the dominance of a continental sources (from soils) for both CO 2 and CH 4 in these rivers. Diffusive air-water CH 4 fluxes ranged between 25 and 1187 lmol m -2 day -1 , and annual integrated values were 288 ± 107, 155 ± 38, and 241 ± 91 lmol m -2 day -1 in the Comoé, Bia and Tanoé rivers, respectively. In the five lagoons, surface waters were also over-saturated in CH 4 (ranging from 1496 to 51843%). Diffusive air-water CH 4 fluxes ranged between 20 and 2403 lmol m -2 day -1 , and annual integrated values were 78 ± 34, 338 ± 217, 227 ± 79, 330 ± 153 and 326 ± 181 lmol m -2 day -1 in the Grand-Lahou, Ebrié, Potou, Aby and Tendo lagoons, respectively. The largest CH 4 oversaturations were observed in the Tendo and Aby lagoons that are permanently stratified systems (unlike the other three lagoons), leading to anoxic bottom waters favorable for a large CH 4 production. In addition, these two stratified lagoons showed low pCO 2 values due to high primary production, which suggests an efficient transfer of organic matter across the pycnocline. As a result, the stratified Tendo and Aby lagoons were respectively, a low source of CO 2 to the atmosphere and a sink of atmospheric CO 2 while the other three well-mixed lagoons were strong sources of CO 2 to the atmosphere but less oversaturated in CH 4 .

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“…Before sampling, the flasks were vigorously shaken for 1 min to ensure equilibrium between headspace and sediment CH 4 concentrations. Concentrations were corrected for CH 4 dissolved in the sediment interstitial water using the Bunsen Solubility Coefficient for CH 4 (Yamamoto et al, 1976), and rates calculated from the slope of the methane-time plot and headspace volume. The time courses of CH 4 concentration were linear (r 2 > 0.975) during 3-20 h after incubation start.…”

Section: Methanogenesismentioning

confidence: 99%

Methanogenesis and methane emissions: effects of water table, substrate type and presence of Phragmites australis

1999

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Solubility of methane in distilled water and seawater

Cited by 647 publications

References 8 publications

Bioremediation of a diesel fuel contaminated aquifer: simulation studies in laboratory aquifer columns

Bioremediation of a diesel fuel contaminated aquifer: simulation studies in laboratory aquifer columns

Seasonal variability of methane in the rivers and lagoons of Ivory Coast (West Africa)

Methanogenesis and methane emissions: effects of water table, substrate type and presence of Phragmites australis

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