scholarly journals Synthesis of protodolomite from aqueous solution at normal temperature and pressure.

1978 ◽  
Vol 12 (2) ◽  
pp. 115-119 ◽  
Author(s):  
Shigeru Ohde ◽  
Yasushi Kitano
Keyword(s):  
Aqueous Solution ◽  
Temperature And Pressure

CO2 Fixation Using MEA and CaCl2 Aqueous Solutions

2014 ◽  
Vol 541-542 ◽  
pp. 130-133
Author(s):  
Feng Liu ◽  
Zhi Xin Li ◽  
Dong Fu
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Calcium Chloride ◽  
Ionic Form ◽  
Temperature And Pressure

The saturated CO2 loadings in monoethanolamine (MEA) aqueous solutions at normal temperature and pressure were measured. The calcium chloride (CaCl2) aqueous solution was added into the CO2 loaded MEA aqueous solution to converse the ionic form of CO2 (CO32-) to CaCO3 precipitation. The influence of the addition of CaCl2 on the CO2 fixation was illustrated.

Uraninite-albite veins from the Mistamisk Valley of the Labrador Trough, Quebec

1981 ◽  
Vol 44 (336) ◽  
pp. 471-483 ◽  
Author(s):  
L. Kish ◽  
M. Cuney
Keyword(s):  
Aqueous Solution ◽  
Fluid Inclusion ◽  
Gas Phase ◽  
Hydrothermal Solution ◽  
Hydrothermal Solutions ◽  
Fluid Inclusion Data ◽  
Vein Formation ◽  
Lower Proterozoic ◽  
Temperature And Pressure ◽  
First Time

AbstractThe uraninite-albite veins of the Mistamisk area occur in the argillite member of the Dunphy Formation, which is near the base of the slightly meta-morphosed Lower Proterozoic sequence of the central Labrador Trough. The vein minerals are albite, uraninite, dolomite, and chlorite, and minor quantities of quartz, tellurides, sulphides, gold, and organic material. Pitchblende and calcite are related to late remobilization.The veins were deposited in fractures by hydrothermal solutions, and metasomatism caused albitization of wall rocks. Fluid inclusions have an unusual composition, described here for the first time in connection with soda-metasomatism; the aqueous solution of the inclusions is oversaturated in NaCl and contains Ca2+ and Mg2+, and the gas phase mostly consists of N2, CO and CO2. The presence of hematite and absence of hydrocarbons indicates that the vein-forming solution was oxidizing.The temperature and pressure of vein formation, estimated from fluid inclusion data, was 300°–350° and 2.5 kbar respectively consistent with the composition of the phengite which is a common metamorphic mineral of the host rock. Vein emplacement occurred in the waning stages of the Hudsonian Orogeny, the hydrothermal solution possibly originating by metamorphism of sodic schists of the Mistamisk area, which are possibly of evaporitic origin.

Destruction of EDTA by Bimetallic Al-Fe/O2 Process under Aqueous Room Temperature and Pressure Conditions

2013 ◽  
Vol 800 ◽  
pp. 555-559
Author(s):  
Xin Liu ◽  
Jin Hong Fan ◽  
Lu Ming Ma
Keyword(s):  
Aqueous Solution ◽  
Benzoic Acid ◽  
Removal Efficiency ◽  
Room Temperature ◽  
Ethylenediaminetetraacetic Acid ◽  
Oxidative Degradation ◽  
Hydroxybenzoic Acid ◽  
Mass Ratio ◽  
Initial Ph ◽  
Temperature And Pressure

Oxidative degradation of ethylenediaminetetraacetic acid (EDTA) in aqueous solution at room temperature and pressure by the bimetallic Al-Fe/O2 process, which was verified by the addition of benzoic acid as ·OH scavenger and the detection of para-hydroxybenzoic acid, was investigated. The results showed that the removal efficiency of EDTA, TOC and TN could be about 98%, 77.5% and 43% respectively after 3h reaction when the initial pH was 5. The effects of initial pH, concentration of EDTA, mass ratio of Al0 and Fe0 and Al-Fe loading were also investigated. Significantly, the bimetallic Al-Fe process exhibited higher reactivity than monometallic Fe0/Al0 process for the degradation of EDTA when the mass ratio of Al0 and Fe0 ranged from 0.11 to 2.97.

Elimination of EDTA in Aqueous Solution by Bimetallic Al-Fe Process

2013 ◽  
Vol 726-731 ◽  
pp. 2398-2402
Author(s):  
Xin Liu ◽  
Jin Hong Fan ◽  
Lu Ming Ma
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Ethylenediaminetetraacetic Acid ◽  
Oxidative Degradation ◽  
The Novel ◽  
Mass Ratio ◽  
Initial Ph ◽  
Temperature And Pressure ◽  
Ph Concentration

Oxidative degradation of ethylenediaminetetraacetic acid(EDTA) in aqueous solution at normal temperature and pressure by the novel bimetallic Al-Fe was investigated. The results showed that the removal efficiency of EDTA, TOC and TN could be about 98%, 75% and 47% respectively after 3h reaction. The effects of initial pH, concentration of EDTA, mass ratio of Al0and Fe0and Al-Fe loading were also investigated. Significantly, the bimetallic Al-Fe process exhibited higher reactivity than monometallic Fe0/Al0process for the degradation of EDTA.

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