Miloudi Hlaibi

Université Hassan II Mohammedia | FSAC · Département de Chimie

Nous avons mis au point une membrane en utilisant un support polymère mixte composé de polyfluorure de vinylidène (PVDF), de polyvinylpyrrolidone (PVP) et de la molécule amphiphile Tween 20 (TW20) comme agent extractif (AE). Pour évaluer les performances de la membrane élaborée, nous avons déterminé des paramètres à l'échelle macroscopique tels que...

In this study, a Carbon/Oxocalcium was prepared from olive mill wastewater and successfully applied to the removal of paracetamol and methylene blue (MB) from an aqueous medium. The optimized composite (0.3% CaO) is rich in anionic sites, porous and has a specific surface area of about 1383 m².g⁻¹. Adsorption tests showed significant adsorption cap...

In this study, two types of affinity polymer membranes containing new organometallic complexes (Gd-glucaric acid) as extractants were prepared and characterized. They were used to extract Cr (VI) ions from concentrated solutions (0.0068M–0.0009 M). These affinity polymer membranes were tested designing an easier extraction process from the substrat...

Librarians and conservators have a hard time restoring and preserving written history and archives. The written heritage is subject to many factors of degradation, affecting its state of conservation, especially cellulosic manuscripts. This research proposes a new technique to improve the processes already used to restore written heritage, and deve...

Paracetamol (acetaminophen) is one of the most commonly used pain relievers and fever reducers due to the high stability, solubility, and hydrophilicity; it is mainly detected in pharmaceutical releases. Its presence in aquatic systems is a serious ecological concern. The pharmaceutical industries are using several technologies for separation, extr...

Currently, membrane technologies represent an essential research field, particularly affinity polymer membranes, which are widely used for treatment processes in green and sustainable chemistry. In this study, two affinity polymer membranes were developed, containing cholic acid (CA) and methyl cholate (MC), as extractive agents. Several physico-ch...

Background Paracetamol compound remains the most used pharmaceutical as an analgesic and antipyretic for pain and fever, often identified in aquatic environments. The elimination of this compound from wastewater is one of the critical operations carried out by advanced industries. Our work objective was to assess studies based on membrane processes...

The extraction and recovery of vanadium through polymer inclusion membrane, based on β-cyclodextrin or c-methyl resorcin[4]arene as a carrier, with polyvinyl alcohol as polymeric matrix and Tributylphosphate as plasticizer from acidic medium has been carried out. Different kinetic and thermodynamic parameters for correspondence to the mathematical...

In human and veterinary medicine, antibiotics are among the most widely used therapeutic classes in the world. Many concerns have been expressed about the toxic effects of these drugs on aquatic and terrestrial ecosystems. In particular, norfloxacin (NRF) is one of the most frequently used antibiotics, hence, its high detection frequency in wastewa...

In this study, the inclusion of polymer membrane based on polyvinyl alcohol and tributyl phosphate (TBP/PVA) was prepared. The membrane is characterized by FT-IR spectroscopy and thermogravimetric analysis. This characterization revealed a good interaction between the base polymer PVA and the modifier TBP, and an adequate thermal stability, which i...

Paracetamol remains the most frequently used analgesic, and consequently, it has often been detected in aquatic environments. The recovery and extraction of this compound from pharmaceutical liquid discharges, as an important active ingredient, is a beneficial operation for the modern industry. This study reports on the selective extraction of para...

The objective of the present study was to develop an original polymer inclusion membrane with an extractive agent. For the elaborated membrane, FTIR spectra indicated the inclusion of the extractive agent, while SEM micrographs allowed characterizing the morphology and the porosity. After grafting Direct Red 80 dye molecules on the membrane surface...

In recent years, the development of functionalized synthetic or natural polymer membranes with good mechanical stability has increased considerably for applications in different extraction and separation membrane processes. The technique of oriented processes through affinity polymer membranes is often adopted for the extraction of rare and value-a...

Olive oil extraction processes generate significant quantities of wastes, olive mill solid waste, and olive mill wastewater, which are rich in precious compounds but toxic to the environment. In particular, olive mill wastewater is highly toxic. It is often discarded in water bodies without pre-treatment, causing severe problems for the aquatic env...

In the present work, a polymer inclusion membrane (PIM) using an amphiphilic molecule Tween 20 (TW20) as the carrier was developed and characterized to hinder environmental contamination caused by norfloxacin (NRF), an antibiotic widely used in veterinary and human medicines. Fourier-transform infrared spectroscopy (FTIR) and scanning electron micr...

n this study, we developed a polymer inclusion membrane (PIM) using the phase inversion technique, based on polymer supports polyvinylidene fluoride (PVDF) and polyvinylpyrrolidone (PVP), with chitin as extractive agent (EA). This PIM was used to study facilitated extraction and recovery processes of Astrazon Red FBL 200%, Blue P3R, DirectTurquoise...

Currently, the use of polymers is a growth necessity in several areas, particularly, medicine, chemical, and food industries, because of their characteristics such as their low cost, light weight and excellent chemical stability. Polysulfone (PSU) is one of the technical polymer classes with high thermal, oxidative and hydrolytic stability; in addi...

The processes for the extraction and removal of Cr (VI) ions using the polymer inclusion membranes (PIMs) that contained Nitrilotriacetic acid (NTA) or Tris (2-aminoethyl)amine (TAM) as the extractive agent were reported in this study. Each PIM was prepared and characterized using SEM and FTIR technique to understand the correlation between its str...

In the present work, two asymmetric polymer membranes based on polyvinylidene fluoride (PVDF) and polyvinylpyrrolidone (PVP) with chitin and chitosan (as extractive agents) were synthesized through the phase inversion technique. The mechanisms of oriented process for the facilitated extraction of blue P3R dye across the as-prepared membranes were e...

Extraction and/or recovery of chromium (Cr) and nickel (Ni) from textiles industry wastewater by membrane separation using polymer inclusion membranes (PIMs) based on polymer supports polyvinylidene fluoride (PVDF) and polyvinyl pyrrolidone (PVP), with Nitrilotriacetic acid (NTA) as extractive agent (EA). Furthermore, to quantify the PIMs performan...

Our objective is to develop a grafted polymer membrane (GPM), with polysulfone (PSU) as polymer support and gluconic acid (GA) as extractive agent. The obtained membrane was characterized by the IR spectroscopic technique which shows the integration of GA agent into the polymer matrix. While the SEM technique allowed to characterize the morphology...

Grafted polymer membranes (GPM) composed of a polymer support and an extractive agent are original materials to improve the performance in the separation process of organic molecules. In this study, a GPM was elaborated with polysulfone (PSU) and poly(1-vinylpyrrolidone) (PVP) as support containing Gluconic acid (GA) as extractive agent. The main o...

The present work relates to oriented membrane processes of the competitive extraction and removal of Cr(VI) ions and blue P3R dye from aqueous mixture. The PIM membranes adopted for these processes were developed using the same polymeric support, containing extractive agents, nitrilotriacetic acid (NTA) and Tris (2-aminoethyl) amine (TrAEA). Severa...

Treatment of colored wastewater from the textile industry is essential to minimize damage to the environment. Various methods based on the adsorbents, biological degradation, coagulation-flocculation, oxidation of Fenton, membrane separation, oxidation with ozone, were used to remove dyes from aqueous solutions. In the present work, according to th...

This article reports the extraction of Hg(II), Cd(II) and Cr(III) ions from acidic media using new supported liquid membranes (SLM). The novelty of this work is the use of an ionic liquid (IL) (isooctylmethylimidazolium bis-2-ethylhexylphosphate) as carrier for the SLM. The ionic liquid was synthesized under microwave and characterized (volumetric...

Our studying involved, Identification and characterization of two novel gadolinium complexes with 2-hydroxypropane-1,2,3-tricarboxylic acid (citric acid) noted H3L and 1,2,2-trimethylcyclopentane-1, 3-dicarboxylic acid (camphoric acid) noted H2L in aqueous solution and in pH range 5,5-7,5. These acids containing the donor atoms (oxygen of OH and CO...

Membrane processes are used in various fields such as the environment, agriculture and different industrial sectors. These clean techniques are often adopted for directed processes such as treatment, recovery, valorization and separation. In this review article, the theoretical principles and the different classifications of liquid membranes, such...

Transport of lysine acetylsalicylate (LAS) through supported liquid membrane was investigated using methyl cholate (MC) as extractive agent. Kinetic and thermodynamic models were developed, based on the interaction of the substrate. LAS with the extractive agent T, and the diffusion of the formed entity (TS) through the membrane. The experimental r...

Membrane processes represent one of the most promising technologies for separation and extraction in modern industries, because they have several advantages. Today these processes are an important research topic, including affinity polymer membranes that are highly efficient for oriented processes. Three affinity polymer membrane types containing l...

To conduct experiments related to the facilitated extraction phenomenon of vanadium ions (VO2+).Three supported liquid membranes (SLMs) were prepared, each containing 0.01 M of Methyl cholate (MC), Resorcinarene (RESO) or Trioctylamine (TOA) as extractive agents. Kinetic and thermodynamic models were developed, based on the interaction of the subst...

To conduct experiments related to the facilitated extraction phenomenon and recovery of vanadium ions VO2+, two grafted polymer membranes were prepared; containing respectively cholic acid and azithromycin as extractive agents and the obtained membranes were characterized. All experiments for the facilitated extraction phenomenon of these ions were...

Our objective is to develop a new supported liquid membrane (SLM) for recovering uranyl ions (substrate) from concentrated industrial solutions of phosphoric acid. In this paper, we have prepared SLMs membrane using Tributyl phosphate (TBP) and Tri-n-octylamine (TOA) as carriers, and the polymer polyvinylidene difluoride (PVDF) as a hydrophobic sup...

The technique of supported liquid membranes (SLM) was used to study the facilitated extraction of Cu(II) ions from acidic solutions, with tri-octhyl amine (TOA), methyl Cholate (MC) and Tri-n-octyl phosphine oxide (TOPO) as carriers , toluene as organic phase and a flat film of polyvinylidene difluoride (PVDF) as hydrophobic support (0.45 μm pore)....

We have developed three new supported liquid membranes (SLMs), for removal of Cd(II) from acidic environments. For the preparation of adopted membranes, we used a plate paper of the polymer PVDF, as porous support with thickness of 100 µm and pore diameter of 0.45 µm, and respectively, amphiphilic molecules of methyl cholate (MC), Trioctylphosphine...

In this work, we developed grafted polymer membranes PSU/PVP were used for the facilitated extraction phenomenon of cadmium Cd2+ and copper Cu2+ ions from acidic environments. Macroscopic parameters, permeability P and initial flux J0 related to this phenomenon of these ions were determined. To explain the experimental and to elucidate the movement...

In this work we have studied the formation of colorless gadolinium complexes with some linear ligands such succinic acid galactaric acid and glycine in dilute solutions and in pH range 5.50 – 7.50

The formation of colorless gadolinium complexes (x, y, z), between x gadolinium ions, y ligands and z protons, of some organic acids, has been studied in aqueous solution. In this work we present the results of investigations on the interaction of the gadolinium ion (Gd(III)) with simple carboxylic acids such as oxalic acid, glycolic acid and malic...

In this work, we have developed two new supported liquid membranes (SLMs) for the recovery of cadmium ions Cd(II) from acidic mediums. To prepare this type of membrane, we have used the PVDF polymer as support, the compounds methyl Cholate (MC), Tri-butyl phosphate (TBP) as carriers, and toluene solvent as the organic phase. We have developed a kin...

The technique of supported liquid membranes (SLM's) was used to achieve the facilitated transport of Chromium ions (Cr(VI) and Cr(III), using Methyl Cholate as carrier, widely used for a facilitated transport of carbohydrates. For our (SLM's), we use toluene as an organic phase and microporous film of PVDF as support. Permeability P and initial flu...

In this work, we developed asymmetric membranes at the base of the PSU / PVP by the phase inversion method and we used Cholic acid (CA) as a carrier, we realized the facilitated transport of cadmium ions in acidic solutions. Macroscopic parameters, permeability P and initial flux J 0 related to facilitated transport of these ions were determined, f...

The formation of colourless gadolinium complexes (x,y,z), between x gadolinium ions, y ligands and z protons, of some organic acids, has been studied in aqueous solution. In this work we present the results of investigations on the interaction of the gadolinium ion (Gd3+) with malic acid (C4H6O5, -hydroxyl dicarboxylic acid), in dilute aqueous sol...

The technique of supported liquid membranes was used to achieve the facilitated transport of Cr(III) ions, using tow amphiphilic carriers, the methyl cholate and resorcinarene. For prepared SLMs, toluene as organic phase and film of polyvinylidene difluoride, as hydrophobic polymer support with 100 μm in thickness and 0.45 μm as the diameter of the...

The technique of supported liquid membranes was used to achieve the facilitated transport of Cr(III) ions, using tow amphiphilic carriers, the methyl cholate and resorcinarene. For prepared SLMs, toluene as organic phase and film of polyvinylidene difluoride, as hydrophobic polymer support with 100 μm in thickness and 0.45 μm as the diameter of the...

Abstract In the present paper, we study the formation of a new colorless complex of gadolinium ion with malonic acid formed in aqueous solution for pH values between 5.50 and 7.50. The general formula of this new organometallic complex is ( malonate ions), this gadolinium complex detected is colorless, and have no absorption band UV–visible. In thi...

In this work, we studied by IR and Raman spectroscopy studies, the structure of dinuclear complexes of the gadolinium ion (Gd3+) with the oxalic and the glycolic acid; comparing the two spectra : the free acid and its complex in the similar experimental conditions. Both complexes were formed in an aqueous solution according to the acidity of (5.50...

The formation of colorless gadolinium complexes (x,y,z) between x gadolinium ions, y ligands and z protons of some organic acids has been studied in aqueous solution. In this work we shall present the results of investigations on the interaction of the gadolinium ion (Gd3+) with different chelation sites of malic and tartric acid formed in dilute s...

A supported liquid membrane (SLM) containing a resorcinarene carrier has been used for the selective transports of arabinitol and perseitol from concentrated aqueous solutions (0.2–0.025M). Maltitol and lactitol, two alditols derived from disaccharides, were also studied. The membrane is made of a microporous poly(tetrafluoroethylene) film impregna...

The formation of colorless gadolinium complexes (x, y, z), between x gadolinium ions, y ligands and z protons, of some organic acids, has been studied in aqueous solution. In this work we present the results of investigations on the interaction of the gadolinium ion (Gd(III)) with simple carboxylic acids such as oxalic acid, glycolic acid and malic...

The formation of colorless gadolinium complexes (x, y, z), between x gadolinium ions, y ligands and z protons, of some organic acids, has been studied in aqueous solution. In this work we present the results of investigations on the interaction of the gadolinium ion (Gd(III)) with simple carboxylic acids such as oxalic acid, glycolic acid and malic...

Two supported liquid membranes (SLMs) containing two different carriers but formed by the same polymer support polyvinylidene difluoride (PVDF) and the same organic phase (xylene), were used to realize the facilitated transport of vanadium ions (VO2+) from the concentrated acid solutions. The SLM support was a micro porous PVDF polymer film of thic...

A supported liquid membrane (SLM) containing a resorcinarene carrier, previously used for the transport of aldoses and alditols, has been used for the selective transport of methyl-α-d-glucopyranoside, methyl-β-d-glucopyranoside, methyl-β-d-galactopyranoside, methyl-α-d-mannopyranoside, and methyl-β-d-xylopyranoside from concentrated (0.20–0.025M)...

Colourless tungstate complexes of the sugar acids, l-manonnic, d-glucaric and galactaric acids have been studied in aqueous solutions. Multinuclear 13C and 183W NMR have been used to identify the structures of the complexes and the sites of chelation of each ligand. Indirect photometry has been used to determine the stoichiometry and the stability...

The tungstate complexes of the sugar acids, meso-tartaric and l-gulonic acids, have been studied in aqueous solutions. Indirect photometry has been used to determine the stability constants and the stoichiometry of these colourless complexes. Multinuclear 13C and 183W NMR spectroscopies have been used to specify the structures of the complexes and...

Tests show that the conductivity and viscosity of solutions of phosphoric acid (54% P2O5) change as increasing quantities of vanadium are added, indicating that the metallic cation interacts with the phosphoric acid molecule. This behaviour is confirmed by measurements of acidity. Determination of R0(H) shows that the acidity of the environment inc...

A supported liquid membrane (SLM) containing a resorcinarene carrier has been used for the selective transport of erythritol, threitol, ribitol and xylitol from concentrated (1.0-0.01 M) aqueous solutions. The membrane is made of a microporous polytetrafluoroethylene film impregnated with a 0.01 M solution of the carrier in CCl4. The permeabilities...

The formation of complexes (x, y, z) between x tungstate ions, ions, and z protons was studied in aqueous solution by 13C and 183W NMR spectroscopy. The overall equilibrium constant for the complex-forming reaction was obtained by a competition method, showing that a (2,2,2) species prevails at pH 4–5. Depending on the pH, various species are forme...

alpha-Hydroxy acids (H(2)L = R(1)R(2)C(OH)COOH) react with tungstate ions in aqueous acidic solution to form mononuclear complexes [WO(2)L(2)](2-) and 2:2 species that may be either mononuclear bis chelates (the tartrate compound) or dinuclear complexes (the isocitrate and mandelate compounds). Ligands with R(1) not equal R(2) afford a pair of 1:2...

The hydrolysis of 7-chloro-4,6-dinitrobenzofurazan (4) and 7-chloro-4,6-dinitrobenzofuroxan (5) to give the related 7-hydroxy derivatives has been kinetically investigated in the pH range 1–6 in aqueous solution. The reactions occur 3500 and 10000 times more rapidly, respectively, than the, hydrolysis of picryl chloride, emphasizing the much higher...

The formation of borate complexes of several mono-, di- and trisaccharides in aqueous solution [t = 25°C, I = 0.1 M (KCl)] was studied by the potentiometric method. Values of the stability constants β1 and β2 of the 1 : 1 and 1 : 2 species were calculated for all compounds, using an extended version of the Antikainen equation. Raffinose, melezitose...

Die Addition von Methanol in 7-Ste1- Iung an 4,6-Dinitrobenzofurazan (Ia), das Benzofuroxan (Ib) und das Memo-methoxy-Derivat (III) wird untersucht.

Methanol readily adds to the unsubstituted 7-carbons of 4,6-dinitrobenzofurazan (DNBZ) and 4,6-dinitrobenzofuroxan (DNBF) as well as the methoxy-bearing carbon of 7-methoxy-4,6-dinitrobenzofurazan (MDNBZ) to form the most stable methoxyl σ adducts known in this solvent. The formation and decomposition of the adducts are subject to general base and...

The technique of SLMs was used to achieve the facilitated extraction of Cr2O72− ions, using methyl cholate and resorcinarene as carriers, widely used for facilitated transport of carbohydrates. For our SLMs, toluene as organic phase and microporous film of PVDF as support. Permeability P and initial flux J0 were determined for different temperature...

To control the stability of the lysine acetylsalicylate compound (LAS) in aqueous solution, some studies of the hy-dronium ion-catalyzed, hydroxide ion-catalyzed, and spontaneous reactions of this active ingredient in water solutions have been carried out. The pH-rate profile (log k obs = f(pH)), shows that the hydrolysis reaction of the LAS, is co...