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Open AccessArticle

1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution

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Department of Chemistry, College of Sciences, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
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Unité de Chimie Moléculaire et Environnement (UCME), Département de Chimie, Faculté des Sciences et Techniques, Université de Nouakchott Al Aasriya, (UNA), Nouakchott 880, Mauritania
*
Author to whom correspondence should be addressed.
Environments 2019, 6(6), 68; https://doi.org/10.3390/environments6060068
Received: 14 May 2019 / Revised: 29 May 2019 / Accepted: 7 June 2019 / Published: 10 June 2019
The aim of this work was to evaluate the performance of a 1,2,3,4-tetrahydropyrimidine derivative as a powerful heterocyclic compound for the elimination of Cd(II) ions from aqueous solutions. The tetrahydropyrimidine derivative was prepared during 30 min of milling by planetary ball mill with a ball-to-powder mass ratio of 8:1 and a rotation speed of 750 rpm. Nuclear magnetic resonance (NMR) and infrared (IR) were used to identify the obtained tetrahydropyrimidine derivatives. Furthermore, batches of experiments were carried out to establish the adsorption equilibrium, kinetics, and thermodynamic variables of the tetrahydropyrimidine derivatives for toxic heavy Cd(II) ions. The adsorption data were simulated by applying the Langmuir manner, the Freundlich equation, the pseudo-first-order and pseudo-second-order equations. The adsorption procedure was discovered to be very influenced by PH. The removal of heavy metal ions reached a maximum value quickly within 6 min and the adsorption data better adjusted the Langmuir isotherm than that of the Freundlich isotherm. The maximum Cd(II) ions adsorption capacity was approximated to be 151.16 mg g−1 at 328 K and a pH of 6 to 7. It was found that the adsorption kinetics of Cd(II) ions obeyed pseudo-second-order adsorption kinetics. The examination of the thermodynamic variables of tetrahydropyrimidine derivative showed a spontaneous endothermic adsorption procedure. Otherwise, positive entropy values put forward a rise in the randomness at the solid-solution interface when heavy metal ions are adsorbed. View Full-Text
Keywords: 1,2,3,4-tetrahydropyrimidine derivative; ball milling; heavy metal; Cd(II) ion; adsorption; kinetics; thermodynamics 1,2,3,4-tetrahydropyrimidine derivative; ball milling; heavy metal; Cd(II) ion; adsorption; kinetics; thermodynamics
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M’hamed, M.O.; Khezami, L. 1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution. Environments 2019, 6, 68.

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