Synthesis, Characterization and Application of A Novel Extracting Agent 2-(4-methylphenyl)-8,9-Dihydro-8,8-Dimethyl-7H-Pyrazolo[1,5-a]Quinazolin-6-one (MPHPQ) for U(VI) Removal from Sulfate Aqueous Solutions
Muhammad, S., Attia, R., Zaki, D., Shehata, M., Hussein, G. (2023). Synthesis, Characterization and Application of A Novel Extracting Agent 2-(4-methylphenyl)-8,9-Dihydro-8,8-Dimethyl-7H-Pyrazolo[1,5-a]Quinazolin-6-one (MPHPQ) for U(VI) Removal from Sulfate Aqueous Solutions. EKB Journal Management System, 66(3), 197-207. doi: 10.21608/ejchem.2022.166874.7057
Sally S. Muhammad; Reda M. Attia; Doaa Ibrahim Zaki; Mohamed Refaat Shehata; Ghada Mahmoud Hussein. "Synthesis, Characterization and Application of A Novel Extracting Agent 2-(4-methylphenyl)-8,9-Dihydro-8,8-Dimethyl-7H-Pyrazolo[1,5-a]Quinazolin-6-one (MPHPQ) for U(VI) Removal from Sulfate Aqueous Solutions". EKB Journal Management System, 66, 3, 2023, 197-207. doi: 10.21608/ejchem.2022.166874.7057
Muhammad, S., Attia, R., Zaki, D., Shehata, M., Hussein, G. (2023). 'Synthesis, Characterization and Application of A Novel Extracting Agent 2-(4-methylphenyl)-8,9-Dihydro-8,8-Dimethyl-7H-Pyrazolo[1,5-a]Quinazolin-6-one (MPHPQ) for U(VI) Removal from Sulfate Aqueous Solutions', EKB Journal Management System, 66(3), pp. 197-207. doi: 10.21608/ejchem.2022.166874.7057
Muhammad, S., Attia, R., Zaki, D., Shehata, M., Hussein, G. Synthesis, Characterization and Application of A Novel Extracting Agent 2-(4-methylphenyl)-8,9-Dihydro-8,8-Dimethyl-7H-Pyrazolo[1,5-a]Quinazolin-6-one (MPHPQ) for U(VI) Removal from Sulfate Aqueous Solutions. EKB Journal Management System, 2023; 66(3): 197-207. doi: 10.21608/ejchem.2022.166874.7057

Synthesis, Characterization and Application of A Novel Extracting Agent 2-(4-methylphenyl)-8,9-Dihydro-8,8-Dimethyl-7H-Pyrazolo[1,5-a]Quinazolin-6-one (MPHPQ) for U(VI) Removal from Sulfate Aqueous Solutions

Egyptian Journal of Chemistry
Volume 66, Issue 3, March 2023, Page 197-207  XML PDF (1.11 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2022.166874.7057
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Authors
Sally S. Muhammad email 1; Reda M. Attia1; Doaa Ibrahim Zaki1; Mohamed Refaat Shehataorcid 2; Ghada Mahmoud Hussein3
1Nuclear Materials Authority
2professor of Inorganic Chemistry Faculty of science Cairo University
3Organic Chemistry,Nuclear Materials Authority
Abstract
The recovery of U(VI) from sulfate solutions can be successfully accomplished using reagents of the pyrazoloquinazolinone class. In order to extract U(VI), the substance 2-(4-methylphenyl)-8,9-dihydro-8,8-dimethyl-7H-pyrazolo[1,5-a]quinazolin-6-one (MPHPQ) was developed. Utilizing a variety of analytical techniques, including Fourier-transform infrared spectroscopy (FTIR), Nuclear magnetic resonance (NMR), mass spectrometry, and elemental analysis, the extractant (MPHPQ) was identified. A batch technique was used in experiments to identify the variables influencing U(VI) extraction and stripping efficiency The diluent type, pH, U(VI) initial concentration, starting (MPHPQ) concentration, contacting time, (Organic/Aqueous) O/A phase ratio, and temperature are the regulating parameters for uranium extraction. The extraction efficiency attained 92% with optimal extraction conditions of 0.08 M (MPHPQ) in chloroform at a starting pH of 4, a 1/1 O/A ratio, and 15 minutes contacting time at room temperature. The U(VI) extraction process is spontaneous and exothermic, according to thermodynamic properties. According to the McCabe-Thiele plot, uranium extraction is possible in 3 stages at O/A ratio of 1/2. while the stripping efficiency attained 90% at optimum conditions using 1M HNO3 at A/O ratio of 1/1 for 15 min. Utilizing the Gaussian 09 program, molecular modeling studies were performed to investigate the ligand's equilibrium geometry (MPHPQ) and [UO2(MPHPQ)2(H2O)2] complex. Sulfate leach liquor of impure uranium concentrates from G. Gattar pilot plant.NMA.Egypt was used as a case study.
Keywords
Pyrazoloquinazolinone; U(VI); extraction; stripping; Density Functional Theory
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