scholarly journals Kinetics of Solvent Extraction of Copper(II) by Bis-(2,4,4-Trimethylpentyl)Phosphonic Acid using a Single Drop Technique

2007 ◽  
Vol 30 (9) ◽  
pp. 1165-1165
Author(s):  
R. K. Biswas ◽  
M. R. Ali ◽  
A. K. Karmakar ◽  
M. Kamruzzaman
Keyword(s):  
Solvent Extraction ◽  
Phosphonic Acid ◽  
Single Drop ◽  
Kinetics Of ◽  
Drop Technique

Kinetics of Solvent Extraction of Copper(II) by Bis-(2,4,4-Trimethylpentyl)Phosphonic Acid using a Single Drop Technique

2007 ◽  
Vol 30 (6) ◽  
pp. 774-781 ◽  
Author(s):  
R. K. Biswas ◽  
M. R. Ali ◽  
A. K. Karmakar ◽  
M. Kamruzzaman
Keyword(s):  
Solvent Extraction ◽  
Phosphonic Acid ◽  
Single Drop ◽  
Kinetics Of ◽  
Drop Technique

scholarly journals Kinetics of Forward Extraction of V(V) in V(V)-NO3- (H+, Na+)-TOA-Kerosene System using Single Drop Technique

2017 ◽  
Vol 9 (2) ◽  
pp. 255-266 ◽  
Author(s):  
R. K. Biswas ◽  
A. K. Karmakar ◽  
M. Mottakin
Keyword(s):  
Maximum Amount ◽  
Drop Formation ◽  
Present System ◽  
Square Root ◽  
Single Drop ◽  
Concentration Region ◽  
Reaction Orders ◽  
Kinetics Of ◽  
Irregular Variation ◽  
Drop Technique

The titled system has been investigated using a single drop technique and flux (F) method of data treatment. In calculating fluxes, the time for drop formation and coalescence (?t = 0.75 s) is considered. At lower concentration region of vanadium, V(V), the rate of V(V) transfer is directly proportional to its concentration. With the increase in [V(V)], slowly extractable V(V) species are formed gradually resulting in decrease in rate. Rate is directly proportional to the square root of [TOA]. It is reported that the most favorable extractable V(V) species exists in maximum amount at pH 2, and so, log F vs pH plots show a maximum at pH~2. The flux of V(V) transfer in most cases is found to be decreased with increasing [NO3-]. Reaction orders with respect to [V(V)], pH and [NO3-] have been attempted to be estimated, but in vein due to non-linearity of plots in most cases. Activation energies for the present system is ~ -12 kJ/mol. This is unexpected but explained. Due to irregular variation of the composition of extractable species with [V(V)], [H+]; as well as temperature; it is not possible to elucidate the value of rate constant (k) and mechanism in simple way.

Extraction and stripping kinetics of copper (II) by N902 using single drop technique

2010 ◽  
Vol 14 (4) ◽  
pp. 275-280 ◽  
Author(s):  
Ping Zhu ◽  
Ze-yun Fan ◽  
Jin-hua Wu ◽  
Guang-ren Qian ◽  
Ming Zhou
Keyword(s):  
Single Drop ◽  
Kinetics Of ◽  
Drop Technique
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