STUDIES ON EXTRACTION OF Co (II) IONS FROM AQUEOUS SOLUTION USING 1,5-DIMETHYL- 2- PHENYL-4-[(E)-(2,3,4-TRIHYDROXYLPHENYL)DIAZENYL]-1,2-DIHYDRO-3H-PYRAZOL-3-ONE
Year: 2017
Type: article
Abstract: Solvent extraction studies on Co(II) using 1,5-dimethyl- 2- phenyl-4-[(E)-(2,3,4-trihydroxylphenyl) diazenyl]- 1,2-dihydro-3H-pyrazol-3-one (H 3 L) were carried out using CHCl 3 as solvent. The ligand 1,5-dimethyl- 2- phenyl-4-[(E)-(2,3,4-trihydroxylphenyl)diazenyl]- 1,2-dihydro-3H-pyrazol-3-one (H 3 L) and its Co(II) complex were successfully synthesized and authenticated. Stoichiometric studies indicated that the complex formed by Co (II) with H 3 L have 2:1 ligand to metal mole ratio. The conductivity test on the ligand and its complex showed that H 3 L and [Co (H 2 L) 2 ] are non- electrolytes . Effects of some extraction variables like pH, salting out agents, time and acids were also investigated. Extraction of Co (II) with H 3 L/CHCl 3 was quantitative (91.66%) at pH 10. Also in 10 -3 M H 2 SO 4 ,Co (II) was extracted up to 81.2 % within ten minutes. The result showed that the amount extracted decreased with increase in acid concentration. Na 2 SO 4 and KClO 4 proved to be good salting out agents for the extraction of Co (II). The ligand synthesised has high potentials for removal of Co (II) from
Institution: University of Nigeria
Language: English
Subfield: Metals and Alloys
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2625752775