Surface modification of biomaterials based on cocoa shell with improved nitrate and Cr(<scp>vi</scp>) removal

Fotsing, Patrick Nkuigue; Woumfo, Emmanuel Djoufac; Mezghich, Soumaya; Mignot, Mélanie; Mofaddel, Nadine; Derf, Franck Le; Vieillard, Julien

doi:10.1039/d0ra03027a

Cited by 28 publications

(6 citation statements)

References 81 publications

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“…e FTIR spectra of QC-MC and QC-MT represent different functional groups of these materials. QC-MC and QC-MT PZC curves are similar to other studies [20][21][22]. erefore, the difference between acid and basic pH is very large for QC-MC and QC-MT.…”

Section: Point Of Charge Zerosupporting

confidence: 86%

Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process

Bassam

Hallaoui

Alouani

et al. 2021

Journal of Chemistry

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The aim of this study is the valorization of the Moroccan clays (QC-MC and QC-MT) from the Middle Atlas region as adsorbents for the treatment of water contaminated by cadmium Cd (II) ions. The physicochemical properties of natural clays are characterized by ICP-MS, XRD, FTIR, and SEM techniques. The adsorption process is investigated as a function of adsorbent mass, solution pH, contact time, temperature, and initial Cd (II) ion concentration. The kinetic investigation shows that the adsorption equilibrium of Cd (II) ions by both natural clays is reached after 30 min for QC-MT and 45 min for QC-MC and fits well to a pseudo-second-order kinetic model. The isotherm study is best fitted by a Freundlich model, with the maximum adsorption capacity determined by the linear form of the Freundlich isotherm being 4.23 mg/g for QC-MC and 5.85 mg/g for QC-MT at 25°C. The cadmium adsorption process was thermodynamically spontaneous and exothermic. The regeneration process showed that these natural clays had excellent recycling capacity. Characterization of the Moroccan natural clays before and after the adsorption process through FTIR, SEM, XRD, and EDX techniques confirmed the Cd (II) ion adsorption on the surfaces of both natural clay adsorbents. Overall, the high adsorption capacity of both natural clays for Cd (II) ions removal compared to other adsorbents motioned in the literature indicated that these two natural adsorbents are excellent candidates for heavy metal removal from aqueous environments.

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Section: Point Of Charge Zerosupporting

confidence: 86%

Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process

Bassam

Hallaoui

Alouani

et al. 2021

Journal of Chemistry

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“…On the cocoa husk, the strong absorption band at 3366.4 cm -1 defines the amino functional groups. The modification of cacao shell as a biomaterial produces amino groups [37][38][39]. According to Vieillard, 2018 [38] modification of cacao shell through amino grafting shows a higher CO 2 retention capacity compared to metal-free products, although its alkalinity and porosity are lower.…”

Section: Structure Of the Materials And Surface Morphologymentioning

confidence: 99%

Exploring Cacao Husk Waste: Surface Modification, Characterization, and its Potential for Removing Phosphate and Nitrate Ions

Nuraini,

Mufandi,

Jamilatun

et al. 2023

J. Ecol. Eng.

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Environmental pollution by phosphate and nitrate ions has become a serious problem. The innovation of cacao husk as an adsorbent and sustainable material can be a solution for absorbing phosphate and nitrate ions. Cocoa husk (CH) derived from the matured cocoa fruit's remaining pod material that often discarded as waste. The aim of this research is to develop an environmentally friendly and economical cacao husk (CH) based material for the absorption of phosphate and nitrate ions from aqueous solutions. CH surface modification is made by reacting the cationic polymer 2-[(methacryloyloxy)ethyl]trimethylammonium (META), into CH treatment (CH-T). Successful surface modification of CH-T with cationic polymers was confirmed to improve the surface properties for the removal of phosphate and nitrate ions. The surface charge morphology, structure, pore distribution and stability of the modified CH-T were investigated by Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Branueur-Emmet-Teller (BET) and elemental analysis. 0.3 grams of CH-T modified with 75% cationic polymer with stirring at 70 rpm for 180 minutes at 50°C was reported as the best modification condition. Removal efficiencies of phosphate and nitrate ions increased after adding quaternary ammonium to CH-T to 96% and 93.4%, respectively. These results indicate that CH modification has prospective as a low-cost catalyst for wastewater treatment.

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“…The chemical functionalization of an INAD using aluminum-loaded activated carbon with grafting of the APTES for fluoride removal was studied by Bakhta et al [103] and the sorption capacity of fluoride onto the functionalized INAD reached 92.0 mg g −1 . Fotsing et al [104] prepared cocoa shell biomass via chemical grafting of APTES and PEI. This functionalized INAD was more effective for removing Cr(VI) and nitrates, with an approximate adsorption uptake of 100 mg g −1 .…”

Section: Removal Of Heavy Metals and Nitratesmentioning

confidence: 99%

Advances in Amine-Surface Functionalization of Inorganic Adsorbents for Water Treatment and Antimicrobial Activities: A Review

2022

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In the last decade, adsorption has exhibited promising and effective outcomes as a treatment technique for wastewater contaminated with many types of pollutants such as heavy metals, dyes, pharmaceuticals, and bacteria. To achieve such effectiveness, a number of potential adsorbents have been synthesized and applied for water remediation and antimicrobial activities. Among these inorganic adsorbents (INAD), activated carbon, silica, metal oxide, metal nanoparticles, metal–organic fibers, and graphene oxide have been evaluated. In recent years, significant efforts have been made in the development of highly efficient adsorbent materials for gas and liquid phases. For gas capture and water decontamination, the most popular and known functionalization strategy is the chemical grafting of amine, due to its low cost, ecofriendliness, and effectiveness. In this context, various amines such as 3-aminopropyltriethoxysilane (APTES), diethanolamine (DEA), dendrimer-based polyamidoamine (PAMAM), branched polyethyleneimine (PEI), and others are employed for the surface modification of INADs to constitute a large panel of resource and low-cost materials usable as an alternative to conventional treatments aimed at removing organic and inorganic pollutants and pathogenic bacteria. Amine-grafted INAD has long been considered as a promising approach for the adsorption of both inorganic and organic pollutants. The goal of this review is to provide an overview of surface modifications through amine grafting and their adsorption behavior under diverse conditions. Amine grafting strategies are investigated in terms of the effects of the solvent, temperature, and the concentration precursor. The literature survey presented in this work provides evidence of the significant potential of amine-grafted INAD to remove not only various contaminants separately from polluted water, but also to remove pollutant mixtures and bacteria.

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Surface modification of biomaterials based on cocoa shell with improved nitrate and Cr(vi) removal

Abstract: The present work addresses the development of simple, low-cost and eco-friendly cocoa-shell-based materials for efficient removal of heavy metal hexavalent chromium (Cr(vi)), and toxic nitrate (NO3−) from aqueous solution.

Cited by 28 publications

References 81 publications

Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process

Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process

Exploring Cacao Husk Waste: Surface Modification, Characterization, and its Potential for Removing Phosphate and Nitrate Ions

Advances in Amine-Surface Functionalization of Inorganic Adsorbents for Water Treatment and Antimicrobial Activities: A Review

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