scholarly journals Effect Of Sodium Dodecyl Sulfate On Viscometric Properties Of Methanol, Ethanol, n-Propanol And iso-Propanol At Different Temperatures

2013 ◽  
Vol 25 (2) ◽  
pp. 110-123 ◽  
Author(s):  
MA Motin ◽  
MA Hafiz Mia ◽  
AKM Nasimul Islam ◽  
KM Salim Reza ◽  
MA Yousuf
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Sodium Dodecyl ◽  
Least Square Method ◽  
Chemical Society ◽  
Alcohol Concentration ◽  
Least Square ◽  
Ternary Mixtures ◽  
Excess Viscosities ◽  
Dodecyl Sulfate ◽  
Different Temperatures

The critical micelle concentration (CMC) of Sodium Dodecyl Sulfate (SDS) in water was determined from the conductance and viscosity measurement. The estimated value of CMC was found to be 0.0085 mol.L-1 at 29°C. The concentration of SDS in pre-micellar and post-micellar region of 0.005M and 0.01M, respectively were used for the viscometric measurements of Methanol, Ethanol, n-Propanol, iso-Propanol at different temperatures. Viscosities of ternary mixtures of Methanol, Ethanol, n- Propanol and iso-Propanol in 0.005M and 0.01M aqueous SDS have been studied over the entire range of composition at 298.15- 323.15K with an interval of 5K except Methanol. Methanol system was studied at 298.15-308.15K owing to its low boiling point. Viscosities increase rapidly with alcohol concentration and show maxima in aqueous SDS rich region at 0.2 – 0.3 mole fraction of alcohols. The position of maxima virtually does not change remarkably with the variation of temperature. The excess viscosities, ?E values are found to be positive and large in magnitude, indicating that aqueous SDS solutions of alcohols are highly non ideal. The heights of the maxima are in the order:iso-Propanol + aqueous SDS > n-Propanol + aqueous SDS > Ethanol + aqueous SDS > Methanol + aqueous SDS.The excess viscosities, ?E data have been fitted by the least square method to the four parameter Redlich-Kister equation and the values of the parameter aj have been reported. Journal of Bangladesh Chemical Society, Vol. 25(2), 110-123, 2012 DOI: http://dx.doi.org/10.3329/jbcs.v25i2.15046

scholarly journals Effect of Sodium Dodecyl Sulfate on Volumetric Properties of Methanol Ethanol n-Propanol and iso-Propanol at (298.15 - 323.15)K

2012 ◽  
Vol 60 (1) ◽  
pp. 129-136 ◽  
Author(s):  
MA Motin ◽  
MA Hafiz Mia ◽  
KM Salim Reza ◽  
AKM Nasimul Islam ◽  
MA Yousuf ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Mole Fraction ◽  
Entire Range ◽  
Sodium Dodecyl ◽  
Excess Molar Volumes ◽  
Least Square Method ◽  
Least Square ◽  
Ternary Mixtures ◽  
Excess Properties ◽  
Dodecyl Sulfate

The critical micelle concentration (CMC) of Sodium dodecyl sulfate (SDS) in water was determined from the conductance and viscosity measurement. The estimated value of CMC was found to be 0.0085 mol.L-1 at 29°C. The concentration of SDS in pre-micellar and postmicellar region of 0.005M and 0.01M, respectively were used for the volumetric measurements of Methanol, Ethanol, n-Propanol and iso- Propanol with SDS solutions. Densities of ternary mixtures of Methanol, Ethanol, n-Propanol and iso-Propanol with 0.005M and 0.01M aqueous SDS have been studied over the entire range of composition at 298.15- 323.15K with an interval of 5K except Methanol. Methanol system was studied at 298.15-308.15K due to its low boiling point. The values of excess molar volumes, VE for all the systems are negative over the entire range of composition, showing minima at ~ 0.45 mole fraction of Methanol, ~ 0.4 mole fraction of Ethanol, ~ 0.25 mole fraction of n-Propanol and ~ 0.3 mole fraction of iso-Propanol. All the systems are showing minima at aqueous SDS rich region. The VE values for the n-Propanol + aqueous SDS and iso-Propanol + aqueous SDS mixtures are slightly sigmoid, being negative at lower mole fractions (x2) and positive at higher x2 of Propanols. The excess properties (VE) data have been fitted by the least square method to the four parameter Redlich-Kister equation and the values of the parameter aj have been reported.DOI: http://dx.doi.org/10.3329/dujs.v60i1.10351  Dhaka Univ. J. Sci. 60(1): 129-136 2012 (January)

scholarly journals Predicting the Toxicities of Ternary Mixtures of two Metals and Sodium Dodecyl Sulfate to Serratia marcescens (SerEW01) from Otamiri River Water

2020 ◽  
pp. 73-86
Author(s):  
Reuben N. Okechi ◽  
Edna I. Chukwura ◽  
Christian O. Nweke
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Serratia Marcescens ◽  
River Water ◽  
Dehydrogenase Activity ◽  
Sodium Dodecyl ◽  
Fixed Ratio ◽  
Environmental Hazards ◽  
Ternary Mixtures ◽  
Concentration Addition ◽  
Dodecyl Sulfate

Background: Otamiri river server as a source of water for domestic activities, urban farming, recreation, aquatic foods in Owerri and environs. It also receives untreated domestic, industrial and agricultural waste water and run offs from the municipality. Seepages from solid wastes dumps at the river banks and sand mining activity going on in the river could also constitute environmental hazards Aims: This study aims at evaluating the interactive effects of the ternary mixtures of sodium dodecyl sulfate (SDS) and some divalent metals on preponderant bacterium (Serratia marcescens (SerEW01)) from the river. Study Design: Fixed ratio ray design was used for the study, with inhibition of dehydrogenase activity as end point. Place and Duration of Study:    Owerri, Imo State, Nigeria, June – December, 2019. Methodology: The bacterium was earlier isolated as the preponderant bacterium isolate from the river water. Fixed ratio ternary mixtures (Equieffect concentration (EEC50) and arbitrary concentration (ABCR) ratios), SDS + Pb + Zn, SDS + Cd +Zn, SDS + Pb +Ni, SDS + Ni + Cd, SDS + Co + Pb and SDS + Co + Cd were designed to evaluate the combined toxicities of these toxicants. Toxicities predicted by concentration addition (CA) and independent action (IA) models were compared with the experimentally observed toxicities. Results: The EC50S observed ranged from 0.046 ± 0.003 mM (Zn) to 2.329 ± 0.092 mM (SDS). The EC50S of the toxicants were statistically different from each other (P<0.05). The order of increasing toxicities were SDS >Pb >Ni > Co > Cd(II) >Zn. Concentration-dependent toxicities with progressive inhibition of the dehydrogenase activity as the concentration increased were observed.. In all ternary mixtures, both the experimentally derived, CA and IA-predicted EC50S were statistically different from each other. Both models predicted lower toxicities compared to the experimental data. The Toxic Index and Model Deviation Ratio indicated synergistic interaction of SDS and metal ions against S. marcescens (SerEW01) Conclusion: This study could constitute base line information towards assessing the possible environmental hazards associated with co-contamination of the environment by SDS and divalent heavy metals, more so when both pollutants are common aquatic pollutants.

scholarly journals Aggregation and micellization of sodium dodecyl sulfate in the presence of Ce(III) at different temperatures: A conductometric study

2008 ◽  
Vol 323 (1) ◽  
pp. 141-145 ◽  
Author(s):  
Artur J.M. Valente ◽  
Hugh D. Burrows ◽  
Sandra M.A. Cruz ◽  
Rui F.P. Pereira ◽  
Ana C.F. Ribeiro ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Sodium Dodecyl ◽  
Dodecyl Sulfate ◽  
Different Temperatures ◽  
Conductometric Study
Sign in / Sign up

Export Citation Format

Share Document