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- W4297140442 abstract "• CO 2 capture and resource utilization of Ca-containing industrial waste brine are realized. • 99.0% decalcification efficiency of Ca-containing industrial waste brine was reach via CO 2 sequestration. • Effect of pH and Mg 2+ on the phase transformation of sediments produced from CO 2 sequestration process was elaborated. • Na 2 SO 4 and NaCl crystals were prepared from the refined brine by five-effect evaporation crystallization. Carbon dioxide (CO 2 ) capture and sequestration play a vital role in global warming and climate change. The objective of this study was to use Ca-containing industrial waste brine for CO 2 sequestration and recovery of NaCl and Na 2 SO 4 . The following operating parameters were investigated: pH, NaCl concentration, CO 2 injection time, and CO 2 inflow rate and temperature. The φ-pH diagrams of the Ca–Mg–CO 3 2– –H 2 O system revealed that the maximum CO 2 dissolution efficiency in brine occurred at pH 10.7–14.0. The decalcification efficiency reached 99.0% at optimal conditions, which were a brine pH of 11.5, a CO 2 injection time of 30 min, a CO 2 injection velocity of 1.5 L/min, a temperature of 35 °C, and a stirrer speed of 300 r/min. The CO 2 capture capacity of Ca-containing industrial waste brine was about 1.29 kg CO 2 / m 3 Ca-containing waste brine. The sediments produced in the CO 2 sequestration process are composed of calcite, which is thermodynamically stable and has economic value. Na 2 SO 4 and NaCl crystals with a narrow size distribution and good anti-caking properties were produced from the refined brine using five-effect evaporation crystallization. These observations provide further understanding and guidance for CO 2 capture and the utilization of high salinity wastewater." @default.
- W4297140442 created "2022-09-27" @default.
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- W4297140442 date "2022-12-01" @default.
- W4297140442 modified "2023-10-18" @default.
- W4297140442 title "Use of Ca-containing industrial waste brine for CO2 sequestration and recovery of NaCl and Na2SO4" @default.
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- W4297140442 doi "https://doi.org/10.1016/j.seppur.2022.122208" @default.
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