scholarly journals Determination of an engineering model for exchange kinetics of strong acid cation resin for the ion exchange of sodium chloride & sodium bicarbonate solutions

2017 ◽  
Vol 17 ◽  
pp. 197-206 ◽  
Author(s):  
Graeme J. Millar ◽  
Gavin L. Miller ◽  
Sara J. Couperthwaite ◽  
Scott Dalzell ◽  
David Macfarlane
Keyword(s):  
Sodium Chloride ◽  
Sodium Bicarbonate ◽  
Strong Acid ◽  
Engineering Model ◽  
Cation Resin ◽  
Acid Cation ◽  
Exchange Kinetics ◽  
Bicarbonate Solutions ◽  
Kinetics Of

scholarly journals Adsorption Equilibrium, Kinetics, Thermodynamics and Dynamic Separation of Magnesium and CalciumIons from Industrial Wastewater by New Strong Acid Cation Resin of SPVC

2021 ◽  
Vol 22 (1) ◽  
pp. 127-138
Author(s):  
Dilfuza Nuriddinova
Keyword(s):  
Calcium Ions ◽  
Industrial Wastewater ◽  
Adsorption Equilibrium ◽  
Dynamic Condition ◽  
Research Work ◽  
Strong Acid ◽  
Cation Resin ◽  
Acid Cation ◽  
Kinetics Of ◽  
Separation Results

In the research work, the adsorption equilibrium, kinetics, thermodynamics and dynamic separation of magnesium and calcium ions from industrial wastewater by new strong acid cation resin of SPVC (sulphonated polyvinylchloride) were investigated. The sorption capacity of the studied resin was 3.78 mmol/g and 3.74 mmol/g for magnesium and calcium ions, respectively, according to Langmuir isotherm. It was found that the pseudo−first−order model was better fitted for the adsorption kinetics of magnesium and calcium ions on the resin. The dynamic separation results confirmed that the selected resin effectively separated magnesium and calcium ions from industrial wastewater in the dynamic condition. The change of the standard Gibbs free energy (G) and enthalpy (H), and entropy (S) were calculated. The obtained results confirmed that the adsorption of magnesium and calcium ions on the selected resin is endothermic.

Correction of acidosis in humans with CRF decreases protein degradation and amino acid oxidation

1993 ◽  
Vol 265 (2) ◽  
pp. E230-E235 ◽  
Author(s):  
D. Reaich ◽  
S. M. Channon ◽  
C. M. Scrimgeour ◽  
S. E. Daley ◽  
R. Wilkinson ◽  
...  
Keyword(s):  
Renal Failure ◽  
Chronic Renal Failure ◽  
Amino Acid ◽  
Sodium Chloride ◽  
Sodium Bicarbonate ◽  
Acid Oxidation ◽  
Body Protein ◽  
Amino Acid Oxidation ◽  
Kinetics Of ◽  
Amino Acid Concentrations

The effect of correction of acidosis in chronic renal failure (CRF) was determined from the kinetics of infused L-[1-13C]leucine. Nine CRF patients were studied before (acid) and after two 4-wk treatment periods of sodium bicarbonate (NaHCO3) and sodium chloride (NaCl) (pH: acid 7.31 +/- 0.01, NaHCO3 7.38 +/- 0.01, NaCl 7.30 +/- 0.01). Leucine appearance from body protein (PD), leucine disappearance into body protein (PS) and leucine oxidation (O) decreased significantly with correction of acidosis (PD: acid 122.4 +/- 6.1, NaHCO3 88.3 +/- 6.9, NaCl 116.2 +/- 9.1 mumol.kg-1.h-1, acid vs. NaHCO3 P < 0.01, NaHCO3 vs. NaCl P < 0.01, acid vs. NaCl NS; PS: acid 109.4 +/- 5.6, NaHCO3 79.0 +/- 6.3, NaCl 101.3 +/- 7.7 mumol.kg-1.h-1, acid vs. NaHCO3 P < 0.01, NaHCO3 vs. NaCl P < 0.01, acid vs. NaCl NS; O: acid 13.0 +/- 1.2, NaHCO3 9.2 +/- 0.9, NaCl 15.0 +/- 1.9 mumol.kg-1.h-1, acid vs. NaHCO3 P < 0.05, NaHCO3 vs. NaCl P < 0.01, acid vs. NaCl NS). There were no significant changes in plasma amino acid concentrations. These results confirm that correction of acidosis in chronic renal failure removes a potential catabolic factor.

Chain exchange kinetics of diblock copolymer micelles studied by nonradiative energy transfer. 1. Experimental design and theory

1995 ◽  
Vol 73 (11) ◽  
pp. 1995-2003 ◽  
Author(s):  
Guojun Liu
Keyword(s):  
Energy Transfer ◽  
Experimental Design ◽  
Fluorescence Intensity ◽  
Approximate Analytical Solution ◽  
Kinetic Scheme ◽  
Quenching Efficiency ◽  
Exchange Kinetics ◽  
Copolymer Micelles ◽  
Kinetics Of

A fluorescence experiment involving mixing donor-labeled micelles with acceptor-labeled unimers has been designed and a kinetic scheme for describing such an experiment has been proposed. An approximate analytical solution was found for the decrease in the donor fluorescence intensity at time t after sample mixing relative to that at time zero, I(t)/I(0). Treating the data of this decrease in donor fluorescence intensity as a function of time using the derived equation allows the simultaneous determination of the rate constant kn for unimer incorporation into micelles and the quenching efficiency φ of donor fluorescence by an acceptor in a micelle. Keywords: polymer micelles, dynamics, chain exchange, energy transfer.

Properties of Frankfurters Processed with Different Levels of Sodium Bicarbonate1

1985 ◽  
Vol 48 (10) ◽  
pp. 861-864 ◽  
Author(s):  
PETER J. BECHTEL ◽  
FLOYD K. McKEITH ◽  
SCOTT E. MARTIN ◽  
EDWARD J. BASGALL ◽  
JAN E. NOVAKOFSKI
Keyword(s):  
Sodium Chloride ◽  
Sodium Bicarbonate ◽  
Meat Products ◽  
Free Water ◽  
Electron Microscopic ◽  
Microscopic Evaluation ◽  
Show Evidence ◽  
Plate Counts ◽  
Emulsified Meat

The effect of substituting sodium bicarbonate for sodium chloride in frankfurters was evaluated using chemical and sensory criteria. Frankfurters were formulated and prepared using one of three treatments: (a) 2% sodium chloride control, (b) 1% sodium bicarbonate and 1% sodium chloride or (c) 2% sodium bicarbonate. Substitution of sodium bicarbonate raised the pH from 6.0 to 7.5 and 8.2 (treatments a, b and c, respectively). Percent free water decreased with sodium bicarbonate substitution from 41.3 to 31.7 and 21.6. Sodium bicarbonate substitution did not significantly affect Warner-Bratzler shear force values or sensory determination of moistness or tenderness. However, sensory evaluations of texture and mouthfeel and off-flavor intensity were less desirable with increased sodium bicarbonate content. Visual evaluations indicated that substitution of sodium bicarbonate for sodium chloride resulted in frankfurters having a darker brown color. Scanning electron microscopic evaluation of frankfurters did not show evidence of major structural differences. Frankfurters in vacuum-packaged bags were stored for up to 30 d in a 4°C lighted retail case. Total plate counts were not significantly different between treatments on days 0, 15 or 30 of storage. These results indicate a potential use of sodium bicarbonate to alter pH and percent free water of emulsified meat products; however, some sensory properties are diminished when sodium chloride is replaced with sodium bicarbonate.

scholarly journals Zero balance ultrafiltration using dialysate during nationwide bicarbonate shortage: a retrospective analysis

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Ryan Mullane ◽  
Lance Fristoe ◽  
Nicholas W. Markin ◽  
Tara R. Brakke ◽  
Helen Mari Merritt-Genore ◽  
...  
Keyword(s):  
Cardiopulmonary Bypass ◽  
Sodium Chloride ◽  
Sodium Bicarbonate ◽  
Medical Center ◽  
Academic Medical Center ◽  
Serum Bicarbonate ◽  
Academic Medical ◽  
Historical Group ◽  
Blood Potassium ◽  
Bicarbonate Solutions

Abstract Background Zero balance ultrafiltration (Z-BUF) utilizing injectable 8.4% sodium bicarbonate is utilized to treat hyperkalemia and metabolic acidosis associated with cardiopulmonary bypass (CPB). The nationwide shortage of injectable 8.4% sodium bicarbonate in 2017 created a predicament for the care of cardiac surgery patients. Given the uncertainty of availability of sodium bicarbonate solutions, our center pro-actively sought a solution to the sodium bicarbonate shortage by performing Z-BUF with dialysate (Z-BUF-D) replacement fluid for patients undergoing cardiopulmonary bypass. Methods Single-center, retrospective observational evaluation of the first 46 patients at an academic medical center who underwent Z-BUF using dialysate over a period of 150 days with comparison of these findings to a historical group of 39 patients who underwent Z-BUF with sodium chloride (Z-BUF-S) over the preceding 150 days. The primary outcome was the change in whole blood potassium levels pre- and post-Z-BUF-D. Secondary outcomes included changes in pre- and post-Z-BUF-D serum bicarbonate levels and the amount of serum bicarbonate used in each Z-BUF cohort (Z-BUF-D and Z-BUF-S). Results Z-BUF-D and Z-BUF-S both significantly reduced potassium levels during CPB. However, Z-BUF-D resulted in a significantly decreased need for supplemental 8.4% sodium bicarbonate administration during CPB (52 mEq ± 48 vs. 159 mEq ± 85, P < 0.01). There were no complications directly attributed to the Z-BUF procedure. Conclusion Z-BUF with dialysate appears to be analternative to Z-BUF with sodium chloride with marked lower utilization of intravenous sodium bicarbonate.

scholarly journals BDST modelling of sodium ion exchange column behaviour with strong acid cation resin in relation to coal seam water treatment

2016 ◽  
Vol 4 (2) ◽  
pp. 2216-2224 ◽  
Author(s):  
Nathan Pember ◽  
Graeme J. Millar ◽  
Sara J. Couperthwaite ◽  
Mitchell de Bruyn ◽  
Kenneth Nuttall
Keyword(s):  
Water Treatment ◽  
Ion Exchange ◽  
Coal Seam ◽  
Strong Acid ◽  
Sodium Ion ◽  
Exchange Column ◽  
Cation Resin ◽  
Ion Exchange Column ◽  
Acid Cation

Performance of Strong Acid Cation Resin D072 for the Adsorption of Fe (II) from Aqueous Phase

2010 ◽  
Vol 113-116 ◽  
pp. 2110-2114 ◽  
Author(s):  
Bin Song Wang ◽  
Fu Yi Cui ◽  
Xin Lin ◽  
Lin Hong Li ◽  
Jie Zhang
Keyword(s):  
Reaction Time ◽  
Heterogeneous Catalyst ◽  
Strong Acid ◽  
High Catalytic Activity ◽  
Adsorption Model ◽  
Cation Resin ◽  
Initial Ph ◽  
Acid Cation ◽  
Viable Method ◽  
Industry Wastewater

Resin D072 was more useful on the adsorption of Fe2+ as a heterogeneous catalyst in the presence of H2O2, which had high catalytic activity in the decolorization of reactive red KE-3B. The conditions of the adsorption of Fe2+ by D072 were optimized, including the initial pH, the Fe2+ concentration and reaction time. It was found that the optimal pH was pH3. The optimal initial concentration of Fe2+ and reaction time were 840 mg L-1 and 60 min, respectively. It illustrated that the adsorption behavior of Fe2+ by D072 obeyed Freundlich adsorption model. The decolorization reaction of reactive red KE-3B was still faster though the catalyst already used 10 times because Fe leaching from the catalyst was negligible. The heterogeneous catalyst seems to be viable method for achieving significant decolorization of dying industry wastewater.

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