Safae Bentahar

• Doctor at University Ibn Zohr - Agadir

Batch adsorption experiments were carried out to eliminating Congo red (CR) and methylene blue (MB) from aqueous solution using oxalic acid-modified jujube shells of Ziziphus lotus (OA-JS)/ZnFe2O4(OA-JS@ZnFe2O4) nanocomposite as a high efficient adsorbent. The Fourier transform infrared (FTIR), Brunauer Emmett Teller, thermogravimetric analysis–dif...

Tunics corm saffron (TCS) is a low-cost adsorbent that removes methylene blue (MB) from an aqueous solution. The TCS was characterized using FTIR and SEM analysis. The influence of MB adsorption variables such as TCS dose (0.4–2.4 g L⁻¹), contact time (0–120 min), MB dye concentration (100–500 mg L⁻¹) was optimized Box–Behnken design (BBD) combined...

The Congo red (CR) desorption, from two dye-loaded agricultural solid wastes such as Argan nutshell (ArS) and Almond shell (AmS), was evaluated in this study. The adsorbents were characterized by FTIR and SEM analyzes. Process optimization was conducted using Response Surface Methodology (RSM) feature central composite design (CCD). At optimum cond...

This study focused on the adsorption in an aqueous solution of methylene blue (MB) cationic dye used in the textile indus- try by the almond shell (AS) using sodium hydroxide (NaOH). The removal process was optimized by employing different parameters like AMAS dosage, reaction time, MB concentration, and pH of the solution. At optimum conditions (A...

Almond shell (AS) is a low-cost adsorbent used in this study for the removal of methylene blue (MB), crystal violet (CV), and Congo red (CR) from an aqueous solution in single and mixture binary systems. The low-cost adsorbent was characterized by FTIR and SEM analysis. The effects of AS dose, contact time, initial dye concentration, pH, and temper...

Purpose Argan nutshell wood (ANW) has been used in this study as an agricultural solid waste to remove Congo red (CR) from an aqueous solution in single and mixture binary in the presence of methylene blue (MB) or crystal violet (CV). Design/methodology/approach The ANW was characterized by Fourier transform infrared and scanning electron microsco...

This study reported the desorption of adsorbed crystal violet (CV) dye on the argan nutshell (ANS) and almond shell (AS) using nitric acid (HNO3) as a desorbing agent and their reusability to remove the CV in multiple consecutive adsorption-desorption cycles. The prepared adsorbents were characterized using FTIR and SEM analysis. Different desorbin...

Purpose This paper aims to focus on studying the batch desorption of adsorbed crystal violet (CV) from date stones ( Phoenix dactylifera ), untreated (UDS) and treated using NaOH (TDS). Design/methodology/approach The process variables such as different desorbing agents, volume and concentration of the desorbing agent, contact time, dye concentrat...

In this study, the date stones/CuFe2O4 nanocomposite was synthesised by a graft of CuFe2O4 nanoparticles on the surface of date stones (DS) for the removal of rhodamine B (RhB) and methyl orange (MO) from aqueous solutions. The adsorption of RhB and MO on DS@CuFe2O4 shows good agreement with second-order kinetic and Langmuir isotherm models. The ma...

In the study, the raw jujube shells of Zizyphus lotus (RJS) and the chemically modified adsorbent with sulphuric acid H2SO4 (SAMJS) were tested as promising adsorbents for removing methylene blue (MB) dye from aqueous solution. After the adsorption, the influence of operating parameters like different eluents,eluent volume andcon- centration, conta...

In this work, desorption of Congo red (CR) from dye-loaded phoenix dactylifera date stones (DS-CR) and Zizyphus lotus jujube shells (JS-CR) was investigated. The effects of operating parameters such as different eluents, volume and concentration of eluent, contact time and temperature on desorption of CR from the DS-CR and JS-CR were studied. Exper...

This work aims the synthesis of substituted alkenes via Knoevenagel condensation using the clay collected from the Agadir region and modifi ed by KF as a heterogeneous catalyst (KF-modifi ed clay). In this context, the infl uence of various parameters on the reaction yield was studied, and the reuse of catalyst was carried out. The results obtained...

Clay modifi ed by potassium fl uoride (KF-modifi ed clay) was used as an ecological alternative and heterogeneous catalyst for the preparation of chalcones via Claisen-Schmidt condensation. In this paper, we have synthesized classical chalcones by condensation of benzaldehyde substituents with acetophenone. Moreover, the other chalcones were also s...

Thymol derivatives were synthesized by condensation reactions implicating its phenolic hydroxyl group. Spectral analysis by 13C, 1H NMR, FT-IR and Mass Spectroscopy confirmed their chemical structures as the following compounds: 2-isopropyl-5-methylphenylformate (1), 2-isopropyl-5-methylphenyl benzoate (2), 5-methyl-2-propylphenyl acetate (3), 2-(2...

Potassium fluoride-modified clay collected from the region of Agadir (Morocco) was used as a hetaerogeneous catalyst in the one-pot synthesis of 3,4-dihydropyrimidine-2(1H)-one derivatives via the Biginelli reaction. The products were obtained with excellent yields (88–98%). The catalyst was characterized X-ray powder diffraction, Fourier-transform...

In this work, Crystal Violet (CV), cationic dye, is removed from aqueous solution, using wood of Argan shell (ARS) and Almond shell (ALS), as low-cost and eco-friendly biosorbants. The parameters influencing the adsorption of CV on each of our adsorbents, contact time (5-180 min), adsorbent dose (0.2-2 g), pH of the solution (3-11), temperature (20...

In this work, removal of methylene blue (MB) dye from aqueous solution by natural clay of Agadir region was carried. The parameters influencing the adsorption of MB such as contact time (20 − 120 min), adsorbent dose (0.4 − 4 g.L−1), initial dye concentration (100 − 900 mg.L−1), temperature (22 − 60 °C) and pH of the solution (3 − 10) were studied....

The adsorption of Methylene Blue (BM), Crystal Violet (CV) and Congo Red (CR) onto natural clay from Agadir region in the binary and ternary system was carried out. All the parameters influencing the adsorption of three dyes were studied namely effect of percentage, contact times (20-120 min), initial dye concentration (100-600 mg L −1), temperatur...

he aim of this work is to determine the removal of Congo red (CR) from solution aqueous using Date stones (DS) of Phoenix dactylifera and jujube shells (JS) of Ziziphus lotus as low- cost and eco-friendly biosorbents. Batch operations were carried out in the liquid phase to observe the effect of various experimental parameters such as contact tim...

In the present study, the powder of jujube shell (raw and modified) was tested for removing crystal violet (CV)from aqueous solution. The biosorbents were characterized by FTIR, SEM and pHZPC analysis.The biosorption behavior was studied in batch experiments such as biosorbent mass, contact time, temperature, initial dye pH, biosorbent particles si...

In This work, the selective and competitive adsorption of organic dyes such as methylene blue (MB), Crystal violet (CV) and Congo red (CR) from binary and ternary mixtures in aqueous solutions on pretreated jujube shell (PJS) were evaluated. The characteristics of PJS were studied using FTIR analysis, this characterization suggest the grafting of...

The adsorption behavior of anionic dye (Congo Red) from aqueous solutions onto natural clay originated from Agadir region (south Morocco) was examined in this work. Batch mode experiments were performed to describe the Influence of interacting parameters such as contact times (10 - 70 min), adsorbent dose (1 - 6 g·L-1 ), initial dye concentrat...

Chemically treated date stones (CTDS) used in this study as adsorbent for the removal of methylene blue (MB) and crystal violet (CV) from aqueous solutions in batch system. The effect of contact time, initial dye pH, temperature and initial dye concentration on the adsorptive removal process was studied. The results show that the removal of MB and...

The biosorption has the advantage that it can be applied to effluent disposal and thus brings various responses to the regulatory requirements for environmental protection. This study presents the results obtained from the use of date stones (DS) for the elimination of crystal violet (CV) from aqueous medium. Several analysis techniques were us...

The biosorption has the advantage that it can be applied to effluent disposal and thus brings various responses to the regulatory requirements for environmental protection. This study presents the results obtained from the use of date stones (DS) for the elimination of crystal violet (CV) from aqueous medium. Several analysis techniques were us...

This study reports the adsorption of crystal violet (CV) cationic dye on natural clay originated from Agadir region (south Morocco) through batch adsorption experiment, in order to develop a low-cost, natural, eco-friendly and alternative adsorbent for the removal of organic pollutants. Several analytical techniques (XRD, BET, TDA, TGA and FTIR)...

This study reports the adsorption of crystal violet (CV) cationic dye on natural clay originated from Agadir region (south Morocco) through batch adsorption experiment, in order to develop a low-cost, natural, eco-friendly and alternative adsorbent for the removal of organic pollutants. Several analytical techniques (XRD, BET, TDA, TGA and FTIR)...

In this work the efficiency of applying raw or modified date stones by sodium hydroxide as biosorbents for the removal of methylene blue (MB) from water solutions was examined. The date stones (DS) and NaOH-modified date stones were characterized with FTIR analysis. Effects of various parameters like biosorbent dose, initial pH, contact time, tempe...

This work is a contribution to the search for new efficient and less expensive adsorbents on the one hand, on the other hand to the valuation of a natural material, namely wood cores jujube (WCJ). The efficiency of this material was tested on a dye widely used in the textile industry the methylene blue (MB), in aqueous solution. Thus, in this study...

The present work reports the characterization and the effectiveness of a vegetable origin adsorbent, Shells of the walnuts of Argan tree (SAR). SAR was characterized in terms of apparent and absolute densities and humidity rate. The thermal stability of the SAR material was determined by thermogravimetry analysis (TGA) and differential thermal anal...