Eric Guibal

Eric Guibal
IMT Mines Alès | EMA · Centre for Materials Engineering (C2MA)

Ph.D.; Engineer

About

355
Publications
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17,984
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Publications

Publications (355)
Article
A one-pot synthesis procedure is designed for preparing two α-aminophosphonate-based-sorbents (DA and TA sorbents). The reaction takes place between amine precursors (two different aliphatic amines with different chain lengths and amino group content; i.e., ethylenediamine (DA) or diethylenetriamine (TA), respectively) and both salicylaldehyde and...
Article
Algal/polyethyleneimine composite beads (ALPEI) have been successfully functionalized by grafting phosphonate (ALPEI-P), quaternary ammonium groups (ALPEI-Q), and by dual moieties (ALPEI-PQ). The materials are characterized by a wide diversity of analytical methods: SEM and SEM-EDX, TGA, BET, FTIR and XPS, elemental analysis and titration (detailed...
Article
The functionalization of cross-linked chitosan (Chito) by an original sulfonating process allows synthesizing a highly efficient sorbent (Sulfo-C) for Li(I) recovery from acidic solution (at pH ≈2). FTIR and XPS analyses show the main contribution of amine and sulfonic groups in the binding mechanism. Maximum sorption capacity reaches 20 mmol Li g⁻...
Article
Urea and thiourea have been successfully deposited at the surface of silica beads (through one-pot reaction with formaldehyde) for the recovery of U(VI) and Th(IV) to produce UR/SiO2 and TUR/SiO2 composites, respectively. These materials have been characterized by FTIR, titration, elemental analysis, BET, TGA, SEM-EDX for identification of structur...
Article
Sorption-based techniques have been widely studied for metal recovery. Conventionally, sorption and desorption steps are operated in fixed-bed column system under one-pass mode (FO); however, such sorption requires a large volume of solution passing the bed when the feed concentration is low. In this study, highly stable amine-coated alginate melam...
Article
A new sorbent was designed by functionalization of a bio-based composite made of chitosan and Arabic gum. The grafting of two sulfonate-bearing moieties allows reaching, at the optimum pH (i.e., pH0 4), a sorption capacity as high as 1.48 mmol U g⁻¹ (with strong affinity; bL being close to 356 L mmol⁻¹). The Sips equation fits better sorption isoth...
Article
Amidoximated algal/polyethyleneimine beads are successfully applied for the sorption of two rare earths elements (REEs, Ln(III)): La (light) and Dy (heavy). The sorption properties are characterized by FTIR and SEM-EDX analyses. The pH effect on metal sorption is investigated with a double objective: optimizing metal recovery and separation. In bin...
Article
Full-text available
The necessity of decontaminating effluents for the dual purpose of environmental beneficiation and valorization of low-grade resources is driving the development of new sorbents. The functionalization of biopolymers is a promising strategy for improving sorption performance. Incorporating magnetic micro-particles offers an opportunity for the facil...
Article
Textile and tannery industries are highly contaminating with discharge of high Cr concentrations. Developing bio-based sorbents with strong affinity for chromate, fast kinetics, and high recyclability is strategic for better reuse of industrial wastewater. Magnetic chitosan micro-particles (MC, for enhancing mass transfer) may constitute a solution...
Article
Full-text available
High-tech applications require increasing amounts of rare earth elements (REE). Their recovery from low-grade minerals and their recycling from secondary sources (as waste materials) are of critical importance. There is increasing attention paid to the development of new sorbents for REE recovery from dilute solutions. A new generation of composite...
Article
Chitosan functionalized with 2-mercaptobenzimidazole (2-MBI) (i.e. [email protected]) shows high sorption capacity (i.e., 1.28 mmol MB g⁻¹) for methylene blue (MB) at pH close to 9.3). Sorption is weakly decreased (by less than 25%) by high NaCl concentration (up to 45 g L⁻¹). The sorption (slightly endothermic) is fitted by the Langmuir equation....
Article
APEI beads (algal/alginate-PEI) were quaternized for enhancing the sorption of Cr(VI) (Q-APEI). The readily reduction of Cr(VI) into Cr(III) in acidic solution and in the presence of organic material constitute an additional phenomenon to be taken into account for the removal of Cr(VI) by Q-APEI. The optimal pH value for both the sorption and reduc...
Article
A new process of phosphorylation of algal/polyethyleneimine composite beads allows to dramatically increase the sorption of rare earth elements (La(III) and Tb(III), as light and heavy REE elements). Sorption proceeds through interactions with several functional groups (phosphonate, but also amine, and carboxylate groups). The sorption capacity at...
Article
Full-text available
The Lower Carboniferous Sediments at Wadi Abu El Mogheirat comprise four stratigraphic formations, from base: Um Bogma, El Hashash, Magharet El Maiah and Abu Zarab formations. Most‐concentrated radioactive anomalies at Wadi Abu El Mogheirat are in the Middle Um Bogma Formation. The gibbsitic marl in this formation shows the highest uranium contents...
Article
Full-text available
The development of new materials is needed to address the environmental challenges of wastewater treatment. The phosphorylation of guar gum combined with its association to chitosan allows preparing an efficient sorbent for the removal of U(VI) from slightly acidic solutions. The incorporation of magnetite nanoparticles enhances solid/liquid. Funct...
Article
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10 Chemically-modified alginate (obtained by grafting urea on alginate, with different ratios; 11 alginate-urea (1:1) and its new derivatives alginate-urea (1:2) with an exceed of the percent 12 of amino group by 7%) was successfully tested for mercury sorption in aqueous solutions. 13 The influence of pH on metal sorption was first investigated: o...
Article
In the present study, beads of alginate, alginate-biuret and alginate-urea, were synthesised for the removal of Ni(II) and Zn(II) metal ions from aqueous solution (in single and in the bimetallic component solution). The properties of the synthesised sorbents were investigated by pHpcz, ESEM-EDX and ESEM. The modelling of experimental data demonstr...
Article
Full-text available
The strong demand for rare-earth elements (REEs) is driven by their wide use in high-tech devices. New processes have to be developed for valorizing low-grade ores or alternative metal sources (such as wastes and spent materials). The present work contributed to the development of new sorbents for the recovery of rare earth ions from aqueous soluti...
Article
Full-text available
With the target of recovering rare earth elements (REEs) from acidic leachates, a new functionalized hydrogel was designed, based on the phosphorylation of algal/polyethyleneimine beads. The functionalization strongly increased the sorption efficiency of the raw material for Pr(III) and Tm(III). Diverse techniques were used for characterizing this...
Article
Magnetic chitosan nanoparticles, activated by glycidyl methacrylate, can be functionalized by grafting diethylenetriamine (DETA) and dithizone for improving U(VI) sorption at pH around 5. The physicochemical characteristics of the materials have been characterized by a wide variety of analytical techniques. Uranyl sorption increases with the pH (pr...
Article
This study investigates Hg(II) and Cu(II) sorption in single and binary systems by alginate/polyethylenimine membranes. Batch experiments are conducted to assess the metal sorption performance and complementary. FTIR and SEM-EDX analyses are used to identify metal binding. The sorption kinetics are better fitted by the pseudo-second-order-equation...
Article
Polyamide (PA6) and hydroxyapatite (n-HAp) have intrinsic sorption properties for metal ions. Their association by melt compounding allows manufacturing a composite material (PA6/n-HAp) efficient for the binding of uranyl and rare earth metal ions (REEs) in acidic solution (in the pH range 2–2.5). The composite shows enhanced sorption capacities (5...
Article
Alginate-PEI beads are functionalized by phosphorylation and applied for the sorption of Nd(III) and Mo(VI). The successful grafting of phosphoryl groups (as tributyl phosphate derivative) is characterized by FTIR and XPS analysis, elemental analysis, titration (pHPZC), TGA, BET and SEM-EDX analyses. The multi-functional characteristics of the sorb...
Article
The valorization of algal biomass and bi-valve shells allows synthesizing, in the presence of urea, a sorbent highly efficient for methylene blue (MB) sorption (sorption capacity: 1.5 mmol MB g⁻¹ at pH 5.8). The dye-functionalized sorbent shows enhanced sorption properties for Cr(VI) recovery at pH 3. The sorption isotherm is fitted by the Langmuir...
Article
A one-pot synthesis procedure is designed for preparing three α-aminophosphonates (R-H, R-COOH, and R-NH2); through the reaction of amine precursors (aniline, anthranilic or o-phenylene diamine, respectively) with salicylaldehyde and triphenylphosphite, under controlled conditions. These materials are first characterized by elemental analysis, FTIR...
Patent
Procédé de fabrication d’une membrane adsorbante à haut pouvoir de percolation L’invention concerne un procédé de fabrication d’une membrane adsorbante (1) qui comprend les étapes suivantes : a) on prépare un mélange qui contient au moins : - une solution aqueuse de polymère cationique dont le pH est compris entre 5 et 8; - une solution aqueuse de...
Patent
Procédé de fabrication d’une mousse à porosité fermée L’invention concerne un procédé de fabrication d’une mousse à porosité fermée (1), caractérisé en ce qu’il comprend au moins les étapes suivantes : a) on prépare un mélange qui contient au moins : - un polymère anionique apte à la gélification ionotropique ; - un agent moussant ; - un agent séqu...
Article
Full-text available
Three commercial resins bearing sulfonic, amino phosphonic, or phosphonic/sulfonic reactive groups have been tested for the removal of iron and cadmium from phosphoric acid solutions. The sorption properties are compared for different experimental conditions such as sorbent dosage (0.5–2.5 g L−1), phosphoric acid concentration (from bi-component so...
Article
Photocatalysis is one of the promising processes for developing greener fuels. This work compares a new liquid Cd-based diacetate and CdOx nanoparticles for photo-desulfurization of diesel. Various tools, including XRD, XPS, TEM, ¹H&¹³C NMR, FTIR, reflectance, and photoluminescence, were used for characterizing the materials. Different parameters,...
Article
A new biosourced composite foam (AF, associating foamed alginate matrix and orange peel filler) is successfully tested for fire-retardant properties. This material having similar thermal insulating properties and density than fire-retardant polyurethane foam (FR-PUF, a commercial product) shows promising enhanced properties for flame retardancy, as...
Article
The recycling of precious and strategic metals from secondary resources (including E-wastes) is of critical importance for the recovery of scarce metals widely used in High-Tech devices. Therefore, the development of efficient and selective sorbents is of great importance. The grafting of 2-mercaptobenzimidazole onto chitosan microparticles allows...
Article
The one-pot synthesis of algal biomass/ polyethyleneimine beads, ALPEI (electrostatic interaction followed by calcium ionotropic gelation), produces a stable sorbent whose sorption properties for rare earth elements (REEs) are significantly improved by functionalization. The grafting of sulfonic groups (S-ALPEI), which have high affinity for REEs,...
Article
A high-energy ball milling of magnetite nanoparticles with amino-phosphonic functionalized poly(glycidyl methacrylate) polymer is used for manufacturing a highly efficient magnetic sorbent for U(VI) sorption from aqueous solutions. The Uranyl ions were adsorbed through the binding with amine and phosphonic groups as confirmed by Fourier Transform i...
Article
Full-text available
Magnetic chitosan microparticles are functionalized by grafting a new hydrazide derivative to produce HAHZ-MG-CH, which is applied to the sorption of metal cations. The functionalization (appearance of new groups) and synthesis mechanisms are confirmed using elemental analyses, FTIR and XPS spectrometry, TGA and EDX analysis, SEM observation and ti...
Article
Silica microspheres are functionalized through the grafting of either polymethacrylic acid or amidoxime groups (mono-functional composite, PMAA/SiO2 and PAO/SiO2, respectively) or in combination (bi-functional composite, PAOxMAA100-x/SiO2). The materials are characterized by textural analysis, TGA, SEM-EDX, elemental analysis, FTIR, XPS, pHPZC in o...
Article
Full-text available
The necessity to recover uranium from dilute solutions (for environmental/safety and resource management) is driving research towards developing new sorbents. This study focuses on the enhancement of U(VI) sorption properties of composite algal/Polyethylenimine beads through the quaternization of the support (by reaction with glycidyltrimethylammon...
Article
Full-text available
Taraxacum officinale extract (TOE) has been tested for preventing the corrosion of cooling systems in desalination plants. The inhibition of corrosion effects has been characterized by chemical and electrochemical methods (Mass loss, potentiodynamic polarization and electrochemical impedance spectroscopy) and surface observations. Tests on cooling...
Article
Full-text available
Modified chitosan gel beads, prepared by molybdate and tungstate coagulation methods, were tested for As(V) removal from solutions in the range of 5–200 mg As L⁻¹. The sorbent is efficient at removing As(V) from acid solutions (optimum pH close to 3), the sorption capacities for As uptake in molybdate- and tungstate-loaded beads are 75 and 44 mg As...
Article
Full-text available
A new material, consisting of alginate–polyethyleneimine (AP) foam, with high percolating properties has been designed for palladium recovery in fixed-bed reactor. The foam, having high affinity for Pd(II), can be also used for manufacturing heterogeneous hydrogenation catalyst. SEM–EDX and TEM analyses were performed to determine the structure of...
Article
Composite beads (APEI*), obtained by the controlled interaction of algal biomass with PEI, followed by ionotropic gelation and crosslinking processes using CaCl2/glutaraldehyde solution, constitute efficient supports for metal binding. The quaternization of algal/PEI beads (Q-APEI*) significantly increases the sorption properties of the composite b...
Article
This study synthesizes polyethyleneimine-glutaraldehyde (PEI-GA) resins using different amounts of GA to crosslink with a certain amount of PEI and compares these adsorbents for the adsorption of Cu(II) (cations) and Se(VI) (anions). Moreover, the stability of adsorption affinity of PEI-GA resins stored in open or sealed conditions is also studied....
Article
Thiourea-formaldehyde (TF) resin is prepared by polycondensation of its two precursors; the incorporation of pre-formed magnetite particles allows synthesizing a magnetic derivative of TF (MTF). These materials are applied to the sorption of two dyes (titan yellow, TY, and rose bengal, RB). Ultrasonic treatment (UT) is tested as an alternative to m...
Article
Full-text available
There is a need for developing new sorbents that incorporate renewable resources for the treatment of metal-containing solutions. Algal-polyethyleneimine beads (APEI) (reinforced with alginate) are functionalized by grafting amidoxime groups (AO-APEI). Physicochemical characteristics of the new material are characterized using FTIR, XPS, TGA, SEM,...
Article
Algal/Polyethyleneimine beads (APEI) were successfully quaternized to prepare an efficient sorbent (Q-APEI) for Sc(III) recovery. The functionalization has been confirmed by a series of analytical procedures: titration (pHPZC), elemental analysis, SEM, BET, EDX, FTIR, XPS and TGA. The sorption properties for Sc(III) from mild acidic solutions have...
Article
The recovery of metal ions from aqueous solutions for environmental preservation or resource saving requires the development of new sorbents with enhanced separation properties. A new process has been designed for the functionalization of magnetic chitosan micro‐particles with grafting of either amidoxime (AO‐AHC) or hydrazinyl amine (HZ‐AHC). Thei...
Article
After synthesis of parent PGMA micro-particles by dispersion polymerization method, diethylenetriamine (DETA) is grafted on the polymer (DETA-PGMA). In the last step, methylene phosphonic groups are grafted on DETA-PGMA by reaction of phosphonic acid groups onto amine functions in the presence of formaldehyde to produce polyaminophosphonic acid sor...
Article
Chitosan is very efficient at removing vanadium from dilute solutions: sorption capacity can reach 400−450 mg V g-1 under optimum experimental conditions, which correspond to pH 3. In acidic solutions, the chitosan's amine groups are protonated, and vanadate anions can be exchanged with counterions bound to −NH3+ sites. A correlation is observed be...
Article
Full-text available
Self-acidified and granulated mesoporous alumina (SAGMA) with dendritic-like microscopic shape was prepared by a new route that involves: (a) direct dehydration of AlCl3 (in the presence of capping petroleum wax), and (b) oxidation of intermediary AlCl3-nanorods. The AlCl3 solution dispersed in petroleum wax (capping media) was firstly dehydrated a...
Article
The copolymerization of styrene with divinylbenzene (DVB) in the presence of silica particles produces a commercial silica-supported polymer (SiO 2 -P) that was chemically reacted with acrylonitrile to synthesize silica-supported polyacrylonitrile (PAN/SiO 2 ). PAN/SiO 2 was functionalized by grafting amidoxime moieties to produce PAO/SiO 2 sorbent...
Article
Full-text available
The sorption of oil from crude oil-in-saline water emulsions was studied using chitosan as biosorbent. The main parameters investigated were chitosan dosage, contact time, and initial crude oil concentration at fixed initial pH. The results showed that the sorption equilibrium was reached within 120 min at oil content as low as 20 mg L⁻¹. Sorption...
Article
Processed ores may contain substantial amounts of residual valuable metals. In the case of the mining wastes issued from the exploitation of gibbsite bearing shale ore in the Southwestern Sinai, the characterization of the residue shows the presence of uranium, rare-earth elements (REEs), aluminum and zinc that can be valorized. Pug leaching at 120...
Article
Full-text available
Two different strategies have been designed for the acid and alkaline leaching steps of hydrodesulphurization catalysts. Tests have been performed on out-of-range catalysts issued from catalyst manufacturing process. Experimental conditions have been screened for these different processes considering the effects of concentration, temperature, solid...
Article
The sorption properties of a functionalized magnetic chitosan sorbent have been investigated for the recovery of Ni(II) and Pb(II) from aqueous solutions. This material was prepared by one-pot co-precipitation of chitosan with formation of magnetic core, followed by a series of grafting steps to immobilize hydrazinyl amine derivative at the surface...
Article
The incorporation of glutaraldehyde crosslinked polyethylenimine (PEI) in algal beads (ABA/PEI) increases its Pd(II) sorption capacity. However, the large size of dispersed agglomerates introduces limitations of sorption performance in terms of availability and accessibility of reactive groups. The homogeneous incorporation of PEI in alginate/algal...
Thesis
Full-text available
"Alginate-urea (1:1), alginate-urea (1:2), alginate-biuret and alginate beads " were synthesized in this test for the adsorption of the selected metal ions; Cd(II), Pb(II), Cu(II), Hg(II), Ni(II) and Zn(II). Several operating parameters are studied such as; the initial concentration of metal ions (C0), the adsorbent dose (SD), the contact time (t),...
Article
A one-pot synthesis procedure was used for preparing two derivatives of chitosan bearing α-aminophosphonate moieties. Chitosan functionalization was performed by reacting chitosan with glutaraldehyde and triphenylphosphite or trimethylphosphite under selected experimental conditions. The materials (CS-Ph and CS-Me, respectively) were characterized...
Article
Magnetic chitosan particles were successfully modified by amidoxime-grafting (as evidenced by FTIR analysis, SEM-EDX analysis, elemental analysis, X-ray diffraction (XRD), thermogravimetric analysis and titration). The effect of pH was investigated showing optimum sorption at pH 4 for U(VI) and pH 5 for Eu(III). Uptake kinetics are relatively fast:...
Article
Full-text available
Two kinds of algal beads were prepared using a carrageenan-based alga (Chrondrus crispus) and an alginate-based alga (Laminara digitata) ionotropically gelled with K(I) and Ca(II), respectively: the process consists of biopolymer partial extraction followed by hydrogel formation. The beads were modified with branched polyethylenimine (bPEI) and glu...