The effect of chelating agent on the separation of Fe(III) and Ti(IV) from binary mixture solution by cation-exchange membrane

Kır, Esengül; Çengeloğlu, Yunus; Ersöz, Mustafa

doi:10.1016/j.jcis.2005.05.088

Cited by 6 publications

(1 citation statement)

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“…In the electroless Cu-plating, chelation of Cu is mandatory since the pH of the bath has to be adjusted to 13.5 for the oxidation of formaldehyde to occur [28]. However, the presence of chelating agent leads to difficult heavy metal removal process since the stability of metal in wastewater becomes very high [29,30].…”

Section: Effect Of Chelating Agentmentioning

confidence: 99%

Kinetic evaluation of simultaneous waste cooking oil hydrolysis and reactive liquid-liquid Cu extraction from synthetic Cu-containing wastewater: Effect of various co-contaminants

Ong

Nguyen

Soetaredjo

et al. 2017

Separation and Purification Technology

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Combination of oil hydrolysis reaction and reactive liquid-liquid extraction of Cu 2+ from wastewater offers economic and environmental advantage than running two processes separately. To give better insight on the application of the proposed process to treat real wastewater, the effects of other pollutants (acid/base, chelating agents, organic solvent, anions) present in the synthetic Cu-containing wastewater were studied. The reaction was carried out in a batch reactor using a water/acylglycerides molar ratio of 30:1 at 225°C up to 8 h to understand the effect of the studied parameters during the reaction time course. It was found that pH influenced acid/base balance, which governs catalysis and Cu-soap formation in subcritical water. Chelating agents formed strong complexation with Cu 2+ that changed Cu removal mechanism from cation exchange reaction to that of conventional solvent extraction. The presence of organic solvents affected the dielectric constant of water that shifted the equilibrium of cation exchange reaction towards lipophilic Cu soap formation. Different anion type produced different type of acid by means of the cation exchange mechanism that influenced acid catalysis and Cu-soap formation. Other heavy metal cations expressed the same cation exchange mechanism and catalysis ability as that of Cu 2+ .

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Section: Effect Of Chelating Agentmentioning

confidence: 99%