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3 results on '"OCP S.A."'

1. New generation of controlled release phosphorus fertilizers based on biological macromolecules: Effect of formulation properties on phosphorus release

Author

Youssef Zeroual, Abdellatif Barakat, Abdallah Oukarroum, Isabelle Bertrand, M'barek Amjoud, Saloua Fertahi, Mohamed Ilsouk, Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Faculté des Sciences et Techniques Gueliz, Mohammed VI Polytechnic University [Marocco] (UM6P), Ingénierie des Agro-polymères et Technologies Émergentes (UMR IATE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Groupe OCP, OCP Group, INRA, and University Mohamed VI Polytechnic (UM6P) for providing financial support for this study (Atlass Project), Institut National de la Recherche Agronomique (INRA)-Institut de Recherche pour le Développement (IRD)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Université Mohammed VI Polytechnique, LMCN, Faculté des Sciences et Techniques Guéliz, Université Cadi Ayyad (Université Cadi Ayyad), OCP/Situation Innovation, OCP S.A., Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Université Mohammed VI Polytechnique [Ben Guerir] (UM6P), and Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro

Subjects
engrais phosphaté, Polymers, 02 engineering and technology, microscopie électronique à balayage, Biochemistry, Coating, chemistry.chemical_compound, phosphorus fertilizers, Structural Biology, [SDV.IDA]Life Sciences [q-bio]/Food engineering, Controlled release, Lignin, Biomass, pesticide formulations, Alginic acid, chemistry.chemical_classification, 0303 health sciences, Phosphorus fertilizer, Molecular Structure, Phosphorus, General Medicine, lignine, 021001 nanoscience & nanotechnology, Alkali metal, 6. Clean water, Thermogravimetry, SEM, 0210 nano-technology, medicine.drug, Drug Compounding, lignin, chemistry.chemical_element, formulation, engineering.material, Polysaccharide, 03 medical and health sciences, Polysaccharides, medicine, biomasse, Fertilizers, Molecular Biology, 030304 developmental biology, Spectrum Analysis, Carboxymethyl cellulose, matériau d'enrobage, chemistry, Delayed-Action Preparations, polysaccharide, engineering, Biopolymer, Nuclear chemistry
Abstract

The main objective of this work was to study the possibility of using polysaccharides and lignin as a coating material for water-soluble triple superphosphate (TSP) granular fertilizers. In this study, composites based on three polysaccharides (sodium alginate (alginic acid sodium salt): AL, kappa-carrageenan: CR and carboxymethyl cellulose sodium salt: CM) and lignin (LG) were prepared. The lignin used was extracted from olive pomace (OP) biomass using the alkali method. The morphological, mechanical, and surface properties as well as the thermal behavior of the coatings were characterized and compared. Their morphology and thickness revealed by scanning electron microscopy (SEM) showed good adhesion between the fertilizer and coating materials. The results showed that the lignin-carrageenan formulation (LGCR) exhibited the highest water absorbency and elastic modulus. Release tests showed the effect of the TSP/biopolymer mass ratio and that the slowest P release was obtained with the LGCR@TSP formulation composite within 3 day. In addition, 59.5% and 72.5% of P was released after 3 days with the TSP/biopolymer mass ratios of 5/1 and 15/1, respectively, compared to 100% P release with the uncoated TSP.

Published
2020
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2. Alfa fibers as viable sustainable source for cellulose nanocrystals extraction: Application for improving the tensile properties of biopolymer nanocomposite films

Author

Abdellatif Barakat, Mounir El Achaby, Zineb Kassab, A. Aboulkas, Materials Science and Nanoengineering Department, Université Mohammed VI Polytechnique, Laboratoire d'Ingénierie et Matériaux [Casablanca] (LIMAT), Faculté des Sciences Ben M'sik [Casablanca], Université Hassan II [Casablanca] (UH2MC)-Université Hassan II [Casablanca] (UH2MC), Ingénierie des Agro-polymères et Technologies Émergentes (UMR IATE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Laboratoire des procédés chimiques et matériaux appliqués (LPCMA), Faculté polydisciplinaire de Béni-Mellal, Université Sultan Moulay Slimane (USMS ), Office Chérifien des Phosphates (OCP S.A.), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA), Université Sultan Moulay Slimane - USMS (Béni Mellal, MA), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)

Subjects
microscope à fluorescence, Materials science, Tensile properties, composition chimique, chemical treatment, 02 engineering and technology, engineering.material, 010402 general chemistry, 01 natural sciences, alfa, chemistry.chemical_compound, Crystallinity, biopolymer, [SDV.IDA]Life Sciences [q-bio]/Food engineering, Ultimate tensile strength, Zeta potential, Thermal stability, résistance à la traction, Cellulose, Biopolymer nanocomposites, Nanocomposite, Cellulose nanocrystals, Sulfuric acid, bleaching, esparto grass, Lignocellulosic fibers, blanchiment, 021001 nanoscience & nanotechnology, stipa tenacissima, 0104 chemical sciences, fibre lignocellulosique, chemistry, Chemical engineering, chemical analysis, biopolymère, engineering, Biopolymer, 0210 nano-technology, Agronomy and Crop Science, traitement chimique
Abstract

Due to its renewability, availability and high cellulose content (≈45%), Alfa fibers (Stipa tenacissima) have been identified as a sustainable source for cellulose microfibers (CMF) and cellulose nanocrystals (CNC) production. Subjecting raw Alfa fibers to alkali, bleaching and sulfuric acid hydrolysis treatments allowed producing CMF and CNC with high yields. The fluorescence microscopy confirmed that CMF, with average diameter of 10 μm, were successfully obtained after bleaching treatments. TEM and AFM showed that the CNC exhibit needle-like shape with an average diameter and length of 5 ± 3 nm and 330 ± 30 nm, respectively, giving rise to an aspect ratio of about 66. XPS measurement confirmed the presence of sulfate groups on the surface of CNC with 2.04 sulfate groups per 100 anhydroglucose units, confirming the negatively charged surface of CNC, with zeta potential value of − 47.39 mV. XRD studies showed that CMF and CNC exhibit cellulose I structure with crystallinity index of 71% and 90%, respectively. FTIR and TGA analyses were used to identify the chemical composition and thermal stability changes during different chemical treatments, suggesting that all non-cellulosic compounds were removed after alkali and bleaching treatments. The obtained CNC were dispersed into three different biopolymer matrices, e.g. chitosan, alginate, and k-carrageenan, at various CNC loadings (1, 3, 5 and 8 wt%), to evaluate their ability to enhance the tensile properties of biopolymers and, at the same time, to produce new biopolymer-based nanocomposite films. It was found that the tensile properties of the as-produced nanocomposite films were largely improved with addition of CNC, resulting in mechanically strong and flexible ecofriendly nanocomposite films.

Published
2018
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3. New highly hydrated cellulose microfibrils with a tendril helical morphology extracted from agro-waste material: application to removal of dyes from waste water

Author

Maria-Cruz Figueroa-Espinoza, A. Aboulkas, M. El Achaby, Nour-Elhouda Fayoud, H. Ben youcef, Materials Science and Nanoengineering Department, Université Mohammed VI Polytechnique, Ingénierie des Agro-polymères et Technologies Émergentes (UMR IATE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Laboratoire des procédés chimiques et matériaux appliqués (LPCMA), Faculté polydisciplinaire de Béni-Mellal, Université Sultan Moulay Slimane (USMS ), Office Chérifien des Phosphates (OCP S.A.), and Université Sultan Moulay Slimane - USMS (Béni Mellal, MA)

Subjects
Materials science, General Chemical Engineering, Ingénierie des aliments, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, valorisation des résidus, Industrial wastewater treatment, chemistry.chemical_compound, symbols.namesake, Adsorption, [SDV.IDA]Life Sciences [q-bio]/Food engineering, Food engineering, Cellulose, déchet agricole, Aqueous solution, caractérisation physico chimique, Swelling capacity, Langmuir adsorption model, food and beverages, General Chemistry, 021001 nanoscience & nanotechnology, 6. Clean water, cellulose, 0104 chemical sciences, Chemical engineering, chemistry, Wastewater, adsorption, biomatériau, symbols, 0210 nano-technology, farm wastes, Waste disposal
Abstract

Cocoa bean shells (CBS) are a by-product of the cocoa bean processing industry. They represent 12–20 wt% of dry cocoa beans, after having been separated from these by a roasting process. CBS often end up as a waste product which contains around 34 wt% of cellulose. The transformation of this waste into valuable and marketable products would help to improve waste disposal. Indeed, the large annual production of this waste makes it a sustainable and renewable bio-source for the production of chemicals and fibers for advanced applications. In this work, new cellulose microfibrils (CMFs) with a tendril helical morphology and highly hydrated gel-like behavior were successfully extracted from CBS waste using a controlled chemical extraction process. During this study, several physico-chemical characterizations were carried out in order to identify the properties of each of the products at different stages of treatment. Microscopic observations show that the extracted CMFs have a tendril helical shape like climbing plant tendrils. Due to this special morphology, the extracted CMFs show a highly hydrated state forming a gel network without additional modifications. The as-extracted CMFs were used as adsorbent material for the removal of methylene blue from concentrated aqueous solution, as an application to wastewater treatment for the removal of basic dyes. Swelling properties, adsorption kinetics and isotherms were carried out in batch experiments. The results indicated that the CMFs have a high swelling capacity (190%). The pseudo second order model can be effectively used to evaluate the adsorption kinetics and the adsorption isotherms can also be described well by the Langmuir isotherm model with a maximum adsorption capacity of 381.68 mg g−1. Thus, the as-extracted CMFs with unique characteristics have the potential to be used as efficient adsorbent material for the removal of different cationic dyes from industrial wastewater.

Published
2017
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