Solvent Extraction of Copper (II) Ions Using Unmodified and Aromatic Amine Modified Red Onion Skin Extract

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Uche John Chukwu
Gervais Manizabayo


This study investigated the use of unmodified red onion skin extract (UROSE), aniline modified red onion skin extract (AmROSE) and 2-aminophenol modified red onion skin extract (APmROSE) for the extraction of copper (II) ions from aqueous media. The effect of pH, agitation time, ligand concentration and metal ion concentration on the percentage extraction were explored. The stoichiometric coefficients of the metal ions and the ligands (UROSE, AmROSE and APmROSE) in each extraction experiment were determined using slope analysis. The results revealed that the percentage extraction of copper (II) ions increased with increasing ligand concentration and agitation time and decreased with increasing initial concentration of copper (II) ions. The optimum pH for the extraction of copper (II) was found to be 6.77, 6.10 and 2.57 for UROSE, AmROSE and APmROSE respectively, while slope analysis showed that UROSE, AmROSE, and APmROSE ligands reacted with the metal ion in 1:1 molar ratio.

Copper (II) ions, ligand, red onion skin extract, slope analysis, solvent extraction.

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How to Cite
John Chukwu, U., & Manizabayo, G. (2020). Solvent Extraction of Copper (II) Ions Using Unmodified and Aromatic Amine Modified Red Onion Skin Extract. International Research Journal of Pure and Applied Chemistry, 20(4), 1-8.
Original Research Article


El Moselhy KM, Azzem MA, Amer A, Al Prol AE. Adsorption of Cu ( II ) and Cd ( II ) from aqueous solution by using rice husk adsorbent. Phys. Chem. An Indian J. 2017; 12(II):1–13.

Salehzadeh J. Aqueous solutions by using xanthium pensylvanicum. Leonardo J. Sci. 2013;23:97–104.

Akpor OB, Ohiobor GO, Olaolu TD. Heavy metal pollutants in wastewater effluents : Sources, effects and remediation 2. Sources of Heavy Metals in. Adv. Biosci. Bioeng. 2014;2(4):37–43.

Tripathi A, Ranjan MR. Bioremediation & biodegradation heavy metal removal from wastewater using low cost adsorbents. J. Bioremediation Biodegrad. 2015;6(6):1–5.

Singh SR, Singh AP. Adsorption of heavy metals from waste waters. Glob. J. Res. Eng. 2012;12(1):3–7.

Sharma PK, Ayub S, Tripathi CN. Agro and horticultural wastes as low cost adsorbents for removal of heavy metals from wastewater : A review. Int. Ref. J. Eng. Sci. 2013;2(8):18–27.

Lata S, Samadder SR. Removal of Heavy metals using rice husk : A review. Int. J. Environ. Res. Dev. 2014;4(2):165–170.

Badawy NA, Garamon SE. Adsorption of cadmium (II) and mercury (ii) onto natural adsorbent Rice Husk Ash (RHA) from aqueous solutions: Study in single and binary system. J. Am. Sci. 2010;6(12): 400–409.

Chukwu UJ, Uzoukwu BA. Extraction of Cu2+ ions from aqueous solutions of bromide ions using 1-phenyl-3-methyl-4-trichloroacetylpyrazolone-5 and molecular modeling of the complex. Recent Patents on Materials Science. 2012;5(2):68-73.

Guerdouh A, Barkat D. Influence of the solvent on the extraction of copper (II) from nitrate medium using salicylideneaniline. 2016;2691.

Fetouhi B, Belarbi H, Benabdellah A, Kirsch G. Extraction of the heavy metals from the aqueous phase in ionic liquid 1- butyl-3-methylimidazolium hexafluoro phosphate by. 2016;7(3):746–754.

Teng TT, Yusup Y, Low LW. Heavy Metal ion extraction using organic solvents : An Application of the Equilibrium Slope Method; 2011.

Cantwell FF, Losier M. Liquid-liquid extraction. In Liquid-liquid Extraction. 2002;297–340.

El-Nadi Y. Solvent extraction and its applications on ore processing and recovery of metals : Classical approach solvent extraction and its applications on ore processing and recovery of metals : Classical approach. Sep. Purif. Rev. 2017; 46(3):195–215.

Nouioua A, Barkat D. Liquid-Liquid extraction of iron (III) from ouenza iron ore leach liquor by tributylphosphate. J. Fundemental Appl. Sci. 2017;1–12.

Kakoi T, Oh TT, Ubota FK, Oto MG. Liquid-Liquid extraction of metal ions with a cyclic ligand calixarene carboxyl derivative. Anal. Sci. 1998;14:501–506.

Ifesan BOT. chemical composition of onion peel ( Allium cepa ) and its ability to serve as a preservative in cooked beef. Int. J. Sci. Res. Methodol. 2017;7(4):1–10.

Lakherwal D. Adsorption of heavy metals : A review. Int. J. Environ. Res. Dev. 2014; 4(1):41–48.

Alrawaiq NS, Abdullah A. A Review of flavonoid quercetin: Metabolism, Bioactivity and antioxidant properties. Int. J. Pharm Tech Res. 2014;6(3):933–941.

Shah PM, Vishnu PV, Gayathri R. Quercetin – A flavonoid : A systematic review. J. Pharm. Sci. Res. 2016;8(8): 878–880.

Yılmaz DÇ, Pekin M. Potentiometric and chromatographic study of Cu (II) and Al (III) complexes of quercetin. Marmara Pharm. Journa. 2017;21(2):330–337.

Rajendran M, Ravichandran R, Devapiriam D. Molecular modeling study of quercetin and their metal complexes. Int. J. Comput. Appl. 2012;50(22):30–34.

Manizabayo G, Chukwu UJ, Abayeh OJ. Extraction of 'Quercetin-Rich’ Red onion skin with acetone and chemical modification using aromatic diazonium salts. Makara Journal Sci. 2019;23(2):79–86.

Nhapi I, Banadda N, Murenzi R, Sekomo CB, Wali UG. Removal of Heavy metals from industrial wastewater using rice husks. Open Environ. Eng. J. 2011;170–180.

Akaranta O, Efanga DC. Dyeability of textile fibers with Azo Compounds prepared by coupling red onion skin extract with diazonium salts. Journal of Nat. Council Sri. Lanka. Sci. 1997;25(2):121-126.

Chukwu UJ, Uzoukwu BA. Synergistic extraction of Zn2+ from aqueous buffer medium of chloride ions into 1- Phenyl -3- Methyl -4- Trichloro Acetyl Pyrazolone - 5 in Benzene and Hexane. Recent Patents on Materials Science. 2010;3:146-150.

Chukwu UJ, Godwin J. Solvent Extraction studies of uranium (VI) from aqueous media into chloroform solution of n,n´-ethylenebis (4-propionyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-oneimine). merican Chemical Science Journal. 2013;3(4):479-488.

Cheraghi M, Sobhanardakani S, Zandipak R, Lorestani B. Removal of Pb ( II ) from aqueous solutions using waste tea leaves. Iran. J. Toxicol. 2015;9(28):1–7.

Etorki AM, El-rais M, Mahabbis MT. Removal of some heavy metals from wastewater by using of fava beans. Am. J. Anal. Chem. 2014;225–234.

Lamsayah M, Khoutoul M, Takfaoui A, Touzani R. High liquid – liquid extraction selectivity of Fe (II) and Pb (II) with TD-DFT theoretical calculations of long chain acid pyrazole- and triazole-based ligands High liquid – liquid extraction selectivity of Fe (II) and. Cogent Chem. 2016;90(2):1–16.

Fetouhi B, Belarbi H, Benabdellah A, Kirsch G. Extraction of the heavy metals from the aqueous phase in ionic liquid 1- butyl-3-methylimidazolium hexafluoro-phosphate by. J. Mater. Environ. Sci. 2016; 7(3):746–754.

Asrafi F, Feyzbakhsh A, Heravi NE. Solvent extraction of cadmium (ii) from sulfate medium by Bis (2-ethylhexyl) Phosphoric Acid in Toluene. Int. J. ChemTech Res. 2009;1(3):420–425.

Ayub S, Changani F. Adsorpton process for wastewater treatment by coconut shell. Int. J. Civil, Struct. Environ. Infrastracture Eng. 2014;4(3):21–34.