Ion-Pair Solvent Extraction of EDTA Anions with Tetraalkylammonium Ions in Various Organic Solvents

Satoh, Keiichi; Zhang, Xiangyu; Miya-iri, Masashi; Honma, A.; Sawada, Kiyoshi

doi:10.1007/s00706-006-0527-8

Cited by 1 publication

(2 citation statements)

References 14 publications

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“…Then, the distribution equilibria of EDTA between the aqueous and organic phases with TOMACl were expressed as [14],…”

Section: Resultsmentioning

confidence: 99%

“…Although the removal of EDTA from waste solutions is important for the treatment mentioned above, EDTA removal has been inadequately discussed in these studies. In fields other than wastewater treatment by electroless plating, the separation of EDTA from general wastewater by extraction using TOMACl was studied [14], in which an aqueous solution of EDTA without metal ions was used as the feed solution. In this study, the solvent extraction of not only the Cu-EDTA complex but also the unbound EDTA ions from the waste plating solution was performed using TOMAC.…”

Section: Introductionmentioning

confidence: 99%

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Solvent Extraction of Copper and EDTA in Electroless Copper Plating Wastewater Using a Quaternary Ammonium Salt

Habaki

Mizuno

Egashira

2023

SERDJ

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To separate both copper and 2,2',2'',2'''-(ethane-1,2-diyldinitrilo)tetraacetic acid (EDTA) from the waste electroless copper plating solution by solvent extraction, the liquid-liquid equilibria of the copper-EDTA complex and unbound EDTA ion were experimentally measured. An organic solution of tri-noctylmethylammonium chloride (TOMACl) was used as solvent. The kerosene solution of TOMACl could extract both copper-EDTA complexes and EDTA ions from the model wastewater. The fractional removal and distribution ratios of both the copper-EDTA complex and EDTA ions decreased as the pH increased. The valence number of the major copper-EDTA complex or EDTA ion in the aqueous phase increased with pH, and the number of TOMA + cations required to chelate the complexes and ions increased. These complexes and ions had lower reactivity with TOMACl owing to steric hindrance. These effects caused lower removal of both copper and EDTA in a higher pH range, which is a typical condition of waste electroless copper solution.

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“…Then, the distribution equilibria of EDTA between the aqueous and organic phases with TOMACl were expressed as [14],…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solvent Extraction of Copper and EDTA in Electroless Copper Plating Wastewater Using a Quaternary Ammonium Salt

Habaki

Mizuno

Egashira

2023

SERDJ

View full text Add to dashboard Cite

show abstract

Ion-Pair Solvent Extraction of EDTA Anions with Tetraalkylammonium Ions in Various Organic Solvents

Cited by 1 publication

References 14 publications

Solvent Extraction of Copper and EDTA in Electroless Copper Plating Wastewater Using a Quaternary Ammonium Salt

Solvent Extraction of Copper and EDTA in Electroless Copper Plating Wastewater Using a Quaternary Ammonium Salt

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