scholarly journals RECOVERY OF NI2+ BY DI-(2-ETHYLHEXYL) PHOSPHORIC ACID (HDEHP)

2009 ◽  
Vol 12 (3) ◽  
pp. 40-50
Author(s):  
Phuong Mai Tran ◽  
Canh Huy Nguyen ◽  
Thang Manh Ngo
Keyword(s):  
Organic Phase ◽  
Liquid Membrane ◽  
Extraction Yield ◽  
Membrane Extraction ◽  
Bulk Liquid ◽  
Bulk Liquid Membrane ◽  
Liquid Membrane Extraction ◽  
Initial Ph ◽  
Decreasing Ph ◽  
Kinetics Of

This paper dealts with solvent and bulk liquid membrane extraction of Ni2+ from its chloride solutions by HDEHP in n-heptane. Effects of extraction time, initial pH and Ni2+ concentration in the feed as well as HDEHP concentration in the organic phase were investigated. Solvent extraction equilibrium was established within 10 minutes. Ni2+ showed to be extracted into the organic phase preferentially as Ni(DEHP), complexes. The Ni2+ extraction yield decreased with increasing initial Ni2+ concentration, with decreasing pH and/or HDEHP concentration. The later is not only due to shifting equilibrium of Nils extraction reaction, but also due to concurent extraction of HCI. Results of bulk liquid membrane extraction could be described by the kinetics of interfacial pseudo-first order reactions. Observed rate constants were determined ⁓ 2,30.10-2 ⁒ 2,68.10-2 min-1 for concentration range [Ni2+]0 ⁓ 10-3 ⁒ 10-2 mol/l.

Treatment of cyanide wastewater by bulk liquid membrane using tricaprylamine as a carrier

2016 ◽  
Vol 73 (12) ◽  
pp. 2888-2895 ◽  
Author(s):  
Guoping Li ◽  
Juanqin Xue ◽  
Nina Liu ◽  
Lihua Yu
Keyword(s):  
Organic Phase ◽  
Liquid Membrane ◽  
Removal Rate ◽  
Feed Solution ◽  
Bulk Liquid ◽  
Complexation Reaction ◽  
Bulk Liquid Membrane ◽  
Reaction Conditions ◽  
Optimal Reaction ◽  
Removal And Recovery

Abstract The transport of cyanide from wastewater through a bulk liquid membrane (BLM) containing tricaprylamine (TOA) as a carrier was studied. The effect of cyanide concentration in the feed solution, TOA concentration in the organic phase, the stirring speed, NaOH concentration in the stripping solution and temperature on cyanide transport was determined through BLM. Mass transfer of cyanide through BLM was analyzed by following the kinetic laws of two consecutive irreversible first-order reactions, and the kinetic parameters (k1, k2, Rmmax, tmax, Jamax, Jdmax) were also calculated. Apparently, increase in membrane entrance (k1) and exit rate (k2) constants was accompanied by a rise in temperature. The values of activation energies were obtained as 35.6 kJ/mol and 18.2 kJ/mol for removal and recovery, respectively. These values showed that both removal and recovery steps in cyanide transport is controlled by the rate of the chemical complexation reaction. The optimal reaction conditions were determined by BLM using trioctylamine as the carrier: feed phase: pH 4, carrier TOA possession ratio in organic phase: 2% (V/V), stripping phase concentration of NaOH: 1% (W/V), reaction time: 60 min, stirring speed: 250 r/min. Under the above conditions, the removal rate was up to 92.96%. The experiments demonstrated that TOA was a good carrier for cyanide transport through BLM in this study.

Study on the Transport Kinetics of Hg2+Through Calix‐Oligomer Bulk Liquid Membrane

2005 ◽  
Vol 42 (5) ◽  
pp. 577-586 ◽  
Author(s):  
H. Korkmaz Alpoguz ◽  
Ahmet Kaya ◽  
Aydan Yilmaz ◽  
Mustafa Yilmaz
Keyword(s):  
Liquid Membrane ◽  
Transport Kinetics ◽  
Bulk Liquid ◽  
Bulk Liquid Membrane ◽  
Kinetics Of

Kinetics of Mercury(II) Transport Through a Bulk Liquid Membrane Containing Calix[4]arene Derivatives as Carrier

2003 ◽  
Vol 38 (7) ◽  
pp. 1649-1664 ◽  
Author(s):  
H. Korkmaz Alpoguz ◽  
Shahabuddin Memon ◽  
Mustafa Ersoz ◽  
Mustafa Yilmaz
Keyword(s):  
Liquid Membrane ◽  
Bulk Liquid ◽  
Bulk Liquid Membrane ◽  
Kinetics Of

Study on the transport selectivity and kinetics of amino acids through di(2-ethylhexyl) phosphoric acid-kerosene bulk liquid membrane

2004 ◽  
Vol 234 (1-2) ◽  
pp. 101-109 ◽  
Author(s):  
Ming Ma ◽  
Bo Chen ◽  
Xubiao Luo ◽  
Hao Tan ◽  
Dingsheng He ◽  
...  
Keyword(s):  
Amino Acids ◽  
Phosphoric Acid ◽  
Liquid Membrane ◽  
Bulk Liquid ◽  
Bulk Liquid Membrane ◽  
Kinetics Of

Transport Kinetics of Hg2+Through Bulk Liquid Membrane Using Calix[4]arene Ketone Derivative as Carrier

2005 ◽  
Vol 39 (4) ◽  
pp. 799-810 ◽  
Author(s):  
H. Korkmaz Alpoguz ◽  
Shahabuddin Memon ◽  
Mustafa Ersoz ◽  
Mustafa Yilmaz
Keyword(s):  
Liquid Membrane ◽  
Transport Kinetics ◽  
Bulk Liquid ◽  
Bulk Liquid Membrane ◽  
Kinetics Of
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