Brine

About: Brine is a research topic. Over the lifetime, 6542 publications have been published within this topic receiving 76741 citations.

Zero Liquid Discharge of Ultrahigh-Salinity Brines with Temperature Swing Solvent Extraction.

Abstract: Zero liquid discharge (ZLD) of hypersaline brines is technically and energetically challenging This study demonstrates ZLD of ultrahigh-salinity brines using temperature swing solvent extraction (TSSE), a membrane-less and nonevaporative desalination technology TSSE utilizes a low-polarity solvent to extract water from brine and then releases the water as a product with the application of low-temperature heat Complete extraction of water from a hypersaline feed, simulated by 50 M NaCl solution (≈292 g/L TDS), was achieved using diisopropylamine solvent Practically all of the salt is precipitated as mineral solid waste and the product water contains <5% of NaCl relative to the hypersaline feed brine Consistent ZLD performance of high salt removals and product water quality was maintained in three repeated semibatch TSSE cycles, highlighting recyclability of the solvent The practical applicability of the technique for actual field samples was demonstrated by ZLD of an irrigation drainage water concentrate This study establishes the potential of TSSE as a more sustainable alternative to current thermal evaporation methods for zero liquid discharge of ultrahigh-salinity brines

Iodine-129 constraints on residence times of deep marine brines in the Canadian Shield

Abstract: Canadian Shield brines are characterized by high concentrations of both stable iodine and 1 2 9 I, the former reflecting its concentrated but diagenetically modified seawater origin, and the latter its long subsurface residence time within its host shield rocks. Stable iodine concentrations in the Yellowknife brine are as high as 18 mg/L, requiring the contribution of iodine from an external marine reservoir. This reservoir likely comprised organic-rich marine sediments in the basin where the brine was produced. Diagenesis of these sediments released iodine to the brine during its infiltration into the subsurface. 1 2 9 I concentrations in the Yellowknife brine are as high as 3.4 x 10 8 atom/L and are due to the fission of 2 3 8 U in the rock matrix and subsequent diffusion of the radiogenic 1 2 9 I into the fracture fluids. This concentration is close to the predicted secular equilibrium concentration for a fluid in basaltic rock with a uranium concentration of 1 mg/kg after the residence time of ∼80 m.y. required for secular equilibrium has been attained. This time period is interpreted as the minimum residence time of the Yellowknife brine in the shield, but it may be much greater, possibly dating back to Middle Devonian time when most of the present-day shield was covered by seawater. Similarly high stable iodine and 1 2 9 I concentrations measured in the Sudbury brine support a generic, ancient marine hypothesis for the origin of shield brines. Stable iodine and 1 2 9 I concentrations in the shallower mine waters are the result of mixing between the brine and low-iodine modern meteoric recharge that is enriched in 1 2 9 I due to global fallout from nuclear fuel waste reprocessing activities.