The role of soil organic matter in the geochemical cycling of chloride and bromide

Gerritse, R.G.; George, Richard J.

doi:10.1016/0022-1694(88)90029-7

Cited by 94 publications

(38 citation statements)

References 25 publications

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“…In the upper River Severn catchment (Wales) Br in streamflow shows no correlation with chloride (as compared with rainfall) and this is interpreted to mean that seasonal cycling is taking place in the subsuface environment (Neal et al, 1990). Field and experimental results for groundwater from Western Australia also indicate that bromide is enriched in organic horizons and is subsequently released on breakdown (Gerritse and George, 1988). In the UK the only data available are from the unsaturated zone of the Chalk at Black Wood (Hampshire) beneath deciduous forest where the Br is significantly enriched with respect to C1 (Br/Cl = 7.56 x 10-3), (Kinniburgh, pers.…”

Section: Soils and The Unsaturated Zonementioning

confidence: 83%

Bromine geochemistry of british groundwaters

Edmunds

1996

Mineral. mag.

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The concentrations of Br in potable groundwaters in the United Kingdom range from 60 to 340 gg 1 --1. The occurrence of Br is described in terms of the Br/C1 weight ratio which enables small changes in bromide concentrations to be assessed in terms of salinity. Median values of Br/C1 in groundwaters range from 2.60 to 5.15 x 10 -3 compared with a sea water ratio of 3.47 x 10 -3. In recent shallow groundwaters the Br/C1 ratio is rather variable in response to a range of natural and anthropogenic inputs (marine and industrial aerosols, industrial and agricultural chemicals including road salt). Some slight enrichment in Br/Cl also occurs naturally during infiltration as a result of biogeochemical processes.Evolution of Br/C1 along groundwater flow lines reflects the sources of increasing salinity; either the influence of marine sedimentary formations or evaporites. The groundwaters in the Triassic sandstones of the English Midlands show significant Br depletion due to the evaporite source, in contrast to groundwaters in Cumbria. Br/C1 ratios in the Sherwood Sandstone of the East Midlands mainly reflect the natural input sources and can be used to help understand the palaeohydrology.

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Section: Soils and The Unsaturated Zonementioning

confidence: 83%

Bromine geochemistry of british groundwaters

Edmunds

1996

Mineral. mag.

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“…McCaffrey et al (1987) noted that during theevaporation of seawater, the residual brine is enriched in bromide due to bromide's higher volubility. Finally, some researchers have suggested that surface vegetation may concentrate bromine (Gerritse and George 1988;Shotyk 1997 Two possible mechanisms could result in greater C1/Br ratios in the zone of evapotranspirative enrichment dii%erential solubili~and selective plant uptake. The highest soil water chloride concentrations generally range from 1000 to 4000 mg/L at gravimetic moisture contents as low as 0.02 g/g.…”

Section: B422mentioning

confidence: 99%

Recharge Data Package for the Immobilized Low-Activity Waste 2001 Performance Assessment

Fayer¹,

Murphy²,

Downs³

et al. 1999

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“…The marine origin of the plain is explained by precipitation, which is the main natural source of bromine. The increase of Br -/Cl -versus seawater (1.5 to 1.7&) can originate in marine aerosols (Duce and Hoffman 1976) and also partly in the percolation of seepage water through the bromide-rich organic horizons of soils (Gerritse and George 1988). These high values of the Br -/Cl -ratio were also observed in other regions (Morocco: Marjoua 1995; Great Britain: Edmunds 1996; USA: Andreasen and Fleck 1997;Fisher and Mullican 1997).…”

Section: Bromidesmentioning

confidence: 78%

Use of chemical tracing to study acquisition modalities of the mineralization and behaviour of unconfined groundwaters under a semi-arid climate: the case of the Souss plain (Morocco)

Hsissou

Bouchaou

Mudry

et al. 2002

Environmental Geology

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The chemical content of the Souss unconfined groundwater displays spatial variations in conductivity (between 400 and 6,000 lS cm -1 ). The chemical tracers (Cl -, SO 4 2-, Sr 2+ , Br -), which characterize the different components of the groundwater, allowed the determination of the origin of water salinity. Cl -and SO 4 2-, reaching respectively 2,000 and 1,650 mg L -1 , display localized salinity anomalies. Br -/Cl -ratio distinguishes marine-influenced impoverished zones versus the oceanic domain. Thus, salinity anomalies can be attributed: (1) downstream, to a currently existing salt-encroachment (with added waste water) and sedimentary palaeosalinity, (2) in the middle-Souss, to High Atlas evaporites and to irrigation water recycling. Sr 2+ / Ca 2+ ratio (evaporites if >1&), confirms the evaporitic origin of the anomalies along the right bank of oued Souss. Furthermore, it facilitates the distinction between the different aquifer contributions (Cretaceous, Jurassic and Triassic), and it highlights leakage from deep Turonian limestones in the groundwater recharge system. To the south, recharge is from the Anti Atlas (evaporite-free) waters. Oxygen-18 measurements confirm the groundwater recharge from the High and Anti Atlas as piezometric maps and chemical tracers suggested, plus from leakage from the Turonian and the marine aquifers.

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The role of soil organic matter in the geochemical cycling of chloride and bromide

Cited by 94 publications

References 25 publications

Bromine geochemistry of british groundwaters

Bromine geochemistry of british groundwaters

Recharge Data Package for the Immobilized Low-Activity Waste 2001 Performance Assessment

Use of chemical tracing to study acquisition modalities of the mineralization and behaviour of unconfined groundwaters under a semi-arid climate: the case of the Souss plain (Morocco)

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