Synthesis and Characterization of Chitosan/Fluorapatite Composites for the Removal of Cr (VI) from Aqueous Solutions and Optimized Parameters

Billah, Rachid El Kaim; Abdellaoui, Youness; Anfar, Zakaria; Giácoman‐Vallejos, Germán; Agunaou, Mahfoud; Soufiane, A.

doi:10.1007/s11270-020-04535-9

Cited by 16 publications

(11 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 1 A illustrates the XRD patterns of CH, TNP, and the CH-TNP composite. The CH diffractogram shows characteristic peaks at 10.16° and 21.8° corresponding to a chitosan polymorph [ 34 ], which has been confirmed by the JCPDS file no. 039-1894.…”

Section: Resultsmentioning

confidence: 79%

“…The absence of peak at 12.0° (characteristic of chitin) clearly indicates the complete conversion of chitin to CH [ 35 ]. The diffraction patterns of TNP show multiple peaks which corresponds to hexagonal phases of fluorapatite (JCPDS file no.15-0876) [ 34 ]. The XRD pattern of CH-TNP composite showed a predominance of TNP peaks with slight peak broadening.…”

Section: Resultsmentioning

confidence: 99%

“…The natural phosphate sample used in this study was collected from Khouribga province, Morocco. This mining city is considered to be the most important phosphate production area in the world with estimated three-quarters of the global phosphate reserves [ 34 ]. Analytical reagent (A.R) grade copper (II) nitrate trihydrate (Cu(NO 3 ) 2 ·3H 2 O), sodium hydroxide (NaOH), hydrochloric acid (HCl), sodium chloride (NaCl), sulfuric acid (H 2 SO 4 ), ethanol (C 2 H 5 OH), magnesium nitrate (Mg(NO 3 ) 2 ), sodium nitrate (NaNO 3 ), and potassium nitrate (KNO 3 ) were obtained from Sigma-Aldrich, Germany.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Chitosan/Phosphate Rock-Derived Natural Polymeric Composite to Sequester Divalent Copper Ions from Water

et al. 2021

Self Cite

View full text Add to dashboard Cite

Herein, a chitosan (CH) and fluroapatite (TNP) based CH-TNP composite was synthesized by utilizing seafood waste and phosphate rock and was tested for divalent copper (Cu(II)) adsorptive removal from water. The XRD and FT-IR data affirmed the formation of a CH-TNP composite, while BET analysis showed that the surface area of the CH-TNP composite (35.5 m2/g) was twice that of CH (16.7 m2/g). Mechanistically, electrostatic, van der Waals, and co-ordinate interactions were primarily responsible for the binding of Cu(II) with the CH-TNP composite. The maximum Cu(II) uptake of both CH and CH-TNP composite was recorded in the pH range 3–4. Monolayer Cu(II) coverage over both CH and CH-TNP surfaces was confirmed by the fitting of adsorption data to a Langmuir isotherm model. The chemical nature of the adsorption process was confirmed by the fitting of a pseudo-second-order kinetic model to adsorption data. About 82% of Cu(II) from saturated CH-TNP was recovered by 0.5 M NaOH. A significant drop in Cu(II) uptake was observed after four consecutive regeneration cycles. The co-existing ions (in binary and ternary systems) significantly reduced the Cu(II) removal efficacy of CH-TNP.

show abstract

Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Chitosan/Phosphate Rock-Derived Natural Polymeric Composite to Sequester Divalent Copper Ions from Water

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…FA particle diameters were about 49 nm in length and 10 nm in wide with less agglomeration and small size due to presence of SA as a bio-stabilizer. By fluoride ion substitution the morphology of particles from HA to FA slightly changed and there is no doubt that presence of SA promotes the particle size become smaller with better crystallinity [31,32]. As in can be seen in EDX results of HA and FA all essential elements were indicated specially fluoride ion emerged at 0.67 eV in FA.…”

Section: Morphological Analysis Of Nanoparticles By Fesemmentioning

confidence: 79%

Green synthesis of Sodium alginate mediated Fluorapatite Nanoparticle via Sol-Gel method

Kia

Ahmad

Shameli

2021

JRNN

View full text Add to dashboard Cite

Fluorapatite (FA) can be used as a bioactive substance in the body, especially the teeth implants. The FA nanoparticle was synthesized by adding the fluorine to the structure of HA using sol–gel method and the heat treatment of 700 °C. Being low costs, eco-friendly and safer features are obvious advantages of the green synthesis of FA nanoparticles by using bio stabilizer of sodium alginate. Calcium nitrate tetrahydrate, diammonium phosphate, ammonium fluoride were used as precursors of Ca, P and F respectively with the ratio of 1:67 Ca/P. The presence of crystal structure of HA and FA investigated by the results of XRD which confirmed the substitution of hydroxyl groups with the fluorine in the crystal structure of apatite. FTIR obtained that fluorine was substituted by hydroxyl groups in the structure of fluoridated hydroxyapatite by disappearing the hydroxyl groups at 3600 cm-1 in the FA. TGA investigated the thermal stability of the nanoparticles that showed the discrepancy of weight loss for HA and FA between 600?C to 800?C. By using TEM, average sizes of 35 and 49 nm were determined for HA and FA respectively. FESEM results confirmed the shapes and distribution of particles of HA and FA in that, round like for the former and rode like for the later. The overall performance of utilizing sodium alginate (SA) as a bio-stabilizer is to obtain better precipitate which leads to having better crystallinity and smaller particle size and thermal stability remarkably improved.

show abstract

“…Therefore, the pseudo-second-order kinetic model was a more suitable model for the adsorption of aspirin using Cs/MCM-41-APS NC. [36][37][38][39] In the related literature, kinetic results were reported for the adsorption kinetic of various water pollutants by organic, [40] inorganic, [41] and composite [42] adsorbents, which are compared with the results of present study.…”

Section: Pseudo-first-and Pseudo-secondorder Kinetic Modelsmentioning

confidence: 80%

Synthesis of chitosan and amine functionalized MCM‐41 nanocomposite for the removal of acetylsalicylic acid from water using central composite design

Moradpour

Sedaghat

Azar

et al. 2021

Applied Organom Chemis

View full text Add to dashboard Cite

In this study, the synthesis of the mesoporous mobile composite material No. 41 (MCM-41) modified with 3-aminopropyltriethoxysilane (APS) and chitosan (Cs) was carried out successfully to form novel Cs/MCM-41-APS nanocomposite (NC). It was also reported that its application as an adsorbent has removed aspirin from water. The structure and morphology of NC was Recently, water pollution has been a warning environmental problem due to pharmaceuticals [1] and personal care product residuals, [1,2] which are produced by homemade and hospital sewage, usage of over-the-counter drugs, and agricultural and industrial wastes, [3] These products are not biodegradable and are not easily degraded in the treatment process. [4] Among various pharmaceuticals pollutants, acetylsalicylic acid, also known as aspirin, is one of the non-steroidal and antiinflammatory drugs widely used by humans and

show abstract

Synthesis and Characterization of Chitosan/Fluorapatite Composites for the Removal of Cr (VI) from Aqueous Solutions and Optimized Parameters

Cited by 16 publications

References 53 publications

Chitosan/Phosphate Rock-Derived Natural Polymeric Composite to Sequester Divalent Copper Ions from Water

Chitosan/Phosphate Rock-Derived Natural Polymeric Composite to Sequester Divalent Copper Ions from Water

Green synthesis of Sodium alginate mediated Fluorapatite Nanoparticle via Sol-Gel method

Synthesis of chitosan and amine functionalized MCM‐41 nanocomposite for the removal of acetylsalicylic acid from water using central composite design

Contact Info

Product

Resources

About