Bromine geochemistry of british groundwaters

Edmunds, W.M.

doi:10.1180/minmag.1996.060.399.03

Cited by 98 publications

(45 citation statements)

References 14 publications

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“…36 In general, samples composition is unlikely to be a result of mixing with seawater, with molar ratios of Mg/Cl, Na/Cl, Ca/Cl, SO 4 /Cl and Cl/HCO 3 +Cl (Table 3) being significantly different from those of seawater. Sample W 3 shows a more depleted Br/Cl ratio (0.8 x 10 -3 ) as compared to the other samples; suggesting dissolution or addition of Cl from an evaporate source; 35 or loss of Br from the fluids to diagenetic solids. 36 In Grp2, Mg/Ca increases with Cl increase ( Figure 3B); however, the Mg/Ca ratio (Table 3) increase occurs independently of Cl in the unevolved fresh-waters of Grp3.…”

Section: Cation-anion Concentration and Mineral Solubilitymentioning

confidence: 99%

“…33 The molar ratio of Br/Cl may be used to characterize the source and evolution of dissolved Cl as marine and evaporite sources have characteristic signatures. 34,35 The Br vs Cl, ( Figure 3G) shows an increase of Br with increasing Cl content, and Br/Cl ratio (Table 3) reveals a relatively constant value for most samples (1.2 to 1.7x10 -3 ) suggesting a conservative behaviour of Br/Cl during water-rock interaction. These values are close to the ocean constant molar ratio (1.5x10 -3 ), suggesting that recharged waters are reflecting the marine aerosol ratio.…”

Section: Cation-anion Concentration and Mineral Solubilitymentioning

confidence: 99%

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Investigating regional groundwater flow systems in baja california central desert region

Ouysse¹,

Wehncke²,

Rivera³

2018

IJH

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In Northern Baja California, environmental conservation may not be fully accomplished in the absence of a clear understanding of key factors controlling and protecting biodiversity. Groundwater is an environmental agent triggering the presence of a wide range of arid ecosystems; therefore, any sustainable development in the region has to maintain a balance between environmental, social and economical benefits. The present study has placed a great emphasis on the understanding and distribution of groundwater flow systems, and their environmental interactions in the protected area of the Valle de Los Círios, using physical-chemical and isotope methods. Results show the presence of three groundwater groups portraying contrasting flow systems conditions. Analyzed samples have been classified as fresh-brackish, and thermal alkaline groundwater as suggested by pH, temperature and TDS. The Br/Cl ratio in most samples was close to the ocean molar value (1.5x10 -3 ) indicating the importance of marine aerosol fraction in the recharged waters; however, Mg/Cl,Na/Cl,Ca/Cl,SO 4 / Cl and Cl/HCO 3 +Cl ratios were significantly different to those of seawater mixing conditions. Dominant ions (Na,Ca and Cl), chemical age proxies (Li), and δ 18 O suggest waters with long residence time, with the possibility of been recharge during the late glacial period. Thermal ground water shows low minor and trace element content and exhibits the dominance of Na-plagioclase hydrolysis; their low levels of Sr and Ba suggest negligible contact with calcareous rocks and their estimated temperature at depth (80to100°C) and TDS suggest groundwater has travelled through fractured media. This introduction study suggests that desertic species in Valle de Los Cirios are highly sustained by groundwater of local and intermediate flows.

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Section: Cation-anion Concentration and Mineral Solubilitymentioning

confidence: 99%

Section: Cation-anion Concentration and Mineral Solubilitymentioning

confidence: 99%

Investigating regional groundwater flow systems in baja california central desert region

Ouysse¹,

Wehncke²,

Rivera³

2018

IJH

View full text Add to dashboard Cite

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“…Many studies of the Br -/Cl -ratio of water suggest that it may be used as an indicator of the origin of salinity (Edmunds 1996;Cartwright et al 2006). In this study, the Br -/Cl -ratio of precipitation from Yumen City is 0.0015, which is typical of inland precipitation and depleted relative to sea water Environ Earth Sci (2015Sci ( ) 73:1901Sci ( -1915Sci ( 1909 (0.0035) (Davis et al 1998).…”

Section: Evolution Of Groundwater Hydrochemistry In Different Unitsmentioning

confidence: 87%

“…Because Br -is rejected during the process of halite precipitation, the Br -/Cl -ratio of solid halite is usually 2-3 orders of magnitude lower than that of the original waters. The Br -/Cl -ratio that would result from dissolution of halite will be low because of the low Br -content of halite (Edmunds 1996). The average values of groundwater Br -/Cl -ratio in C-S and B-A are 0.00059 and 0.00015, respectively.…”

Section: Evolution Of Groundwater Hydrochemistry In Different Unitsmentioning

confidence: 97%

Using hydrochemical and isotopic data to determine sources of recharge and groundwater evolution in an arid region: a case study in the upper–middle reaches of the Shule River basin, northwestern China

Wang

Han

et al. 2014

Environ Earth Sci

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Understanding sources of recharge and mechanisms for hydrogeochemical evolution of groundwater in the Shule River basin, an arid inland river basin in northwestern China, is essential for successful water resource management. Sources of water and associated groundwater recharge processes were investigated using hydrogeological, hydrogeochemical, and isotopic methods. The study area was divided into three parts: Changma, the Shule valley, and the Beishan area. The hydrogeochemical and isotopic analysis results show that groundwater in Changma mainly originated from precipitation in the Qilian Mountains. Lateral flow from Changma is the primary recharge mechanism, while direct recharge by infiltration of precipitation can be neglected in the Shule valley. Minerals within the aquifer material (e.g., halite, calcite, dolomite, and gypsum) dissolve into water that recharges the groundwater system. Therefore, strong linear relationships were found between Na ? and Cl -and between Ca 2?

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“…Although bromine is the 46th most abundant element in the Earths crust (2.5 ppm), because of its high solubility, bromine is found predominantly, as bromide, in sea water, (65 000 mg l 1 ) and in brines (Greenwood and Ernshaw, 2005). The level of bromide in groundwaters varies considerably and is usually linked with chloride concentration (Edmunds, 1996). For potable groundwaters of low salinity, bromide concentrations are typically less than 400 mg l 1 (Edmunds, 1996;Davis et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Bromine and bromide in rainfall, cloud, stream and groundwater in the Plynlimon area of mid-Wales

Neal¹,

Neal²,

Hughes³

et al. 2007

Hydrol. Earth Syst. Sci.

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Bromine in rainfall, cloud water, stream water and groundwater were measured in the upper River Severn catchments at Plynlimon in midWales using two analytical procedures for bromide determination: a colorimetric method and, later, ion chromatography. Discrepancies between the methods indicated that the colorimetric method was measuring more than just bromide so it was dissolved labile bromine (DLBr) (Neal et al. 2007). This paper reports the variation in DLBr and bromide across the Plynlimon region and assesses the differences between these two measures. The average DLBr concentration in the streams ranges between 18.3 and 27.8 mgl -1 compared with a rainfall average concentration of 15.6 mg l 1 . The corresponding bromide concentrations in the streams are 13.818.6 mg l -1 and 13.2 mg l -1 in rainfall. For cloud water, throughfall and stemflow, DLBr concentrations are an order of magnitude higher than in rainfall and the concentrations are strongly correlated with chloride. Average values of bromide in rainfall and cloud water are similar to those of DLBr and are strongly correlated with chloride: unfortunately, no bromide measurements were taken in throughfall and stemflow. These results indicate that marine aerosol inputs are high and that the DLBr in these inputs is dominated by bromide. For cloud water, DLBr was correlated with dissolved organic carbon (DOC) as well as with chloride; hence, there may well be an organic-associated component. Within the streams draining the forested areas, DLBr increases with time as DOC increases. DLBr concentrations in the streams are correlated with DOC in most cases and, to a lesser degree, with chloride. However, for bromide there is no correlation with DOC, but a weak correlation with chloride remains and the gradient is higher than for the DLBr case. Increasing concentrations of both DLBr and DOC may well reflect the wetting up of the catchments as transpiration diminshes as the trees age as well as through felling. In groundwater, only DLBr has been measured, and its concentration is similar to that for the streams. However, in the groundwater zone, DLBr is poorly correlated with DOC concentrations, in which DOC is largely converted to CO 2 . Atmospheric inputstream output flux estimates indicate a net uptake of bromide by the catchment of around 30%, matched by a corresponding release of DOC-associated bromine.

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Bromine geochemistry of british groundwaters

Cited by 98 publications

References 14 publications

Investigating regional groundwater flow systems in baja california central desert region

Investigating regional groundwater flow systems in baja california central desert region

Using hydrochemical and isotopic data to determine sources of recharge and groundwater evolution in an arid region: a case study in the upper–middle reaches of the Shule River basin, northwestern China

Bromine and bromide in rainfall, cloud, stream and groundwater in the Plynlimon area of mid-Wales

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