Insights into Effective Adsorption of Lead ions from Aqueous Solutions by Using Chitosan-Bentonite Composite Beads

Şenol, Zeynep Mine; Şimşek, Selçuk

doi:10.1007/s10924-022-02464-8

Cited by 41 publications

(16 citation statements)

References 53 publications

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“…The point of zero charge of Fe 3 O 4 @APTMS/PGME-deta was determined by the technique of evaluating the change of initial and equilibrium pH values [ 32 ]. For this purpose, the initial pH of 0.01 mol/dm 3 NaCl solutions (20 cm 3 in a series of erlenmeyer flasks) was adjusted between 2 and 11 using 0.1 mol/dm 3 NaOH or 0.1 mol/dm 3 HCl.…”

Section: Methodsmentioning

confidence: 99%

Speciation of Hexavalent Chromium in Aqueous Solutions Using a Magnetic Silica-Coated Amino-Modified Glycidyl Methacrylate Polymer Nanocomposite

et al. 2023

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A new magnetic amino-functionalized polymeric sorbent based on glycidyl methacrylate was synthesized and used in the separation of chromium Cr(VI) oxyanions sorption from aqueous solutions in a static batch system. The kinetic and isothermal parameters of the sorption process were determined. The experimental data were best fitted by a pseudo-second-order model with R2 = 0.994 and χ2 = 0.004. The sorption process of Cr(VI) removal by amino-functionalized sorbent was controlled by both intraparticle diffusion and liquid film diffusion. The equilibrium results showed that the sorption process is best described by the Freundlich model, followed closely by the Sips isotherm model, with a maximum sorption capacity of 64 mg/g. Quantum chemical modeling revealed that the sorption sites on the sorbent surface are fragments with diethylenetriamine and aminopropyl silane groups that coated the magnetic nanoparticles. The calculations showed that Cr(VI) oxyanions (Cr2O72−, CrO42− and HCrO4−) bind to both sorption sites, with diethylenetriamine centers slightly favored. The X-ray photoelectron spectroscopy (XPS) spectra demonstrate that the chromium bound to the sorbent in the form of Cr(III), indicating that the Cr(VI) can be converted on the surface of the sorbent to a less harmful form Cr(III) due to the sorbent’s chemical composition.

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Section: Methodsmentioning

confidence: 99%

Speciation of Hexavalent Chromium in Aqueous Solutions Using a Magnetic Silica-Coated Amino-Modified Glycidyl Methacrylate Polymer Nanocomposite

et al. 2023

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“…After the adsorption, the mixture was filtered through a syringe filter, and the Cu 2+ concentration was determined by ASS, which was then used for isotherm and kinetics model analyses. The adsorbed amount ( q , mg·g −1 ) and metal removal efficiency ( R , %) of Cu 2+ were subsequently calculated according to Equations (5) and (6), respectively [ 45 , 46 ].

where q (mg/g) represents the mass of the Cu 2+ adsorbed by each gram of NAC; C 0 (mg/L) and C e (mg/L) represent the initial Cu 2+ concentration and the equilibrium concentrations of Cu 2+ , respectively; V (L) represents the Cu 2+ volume; and m (g) is the dose of NAC absorbent.…”

Section: Methodsmentioning

confidence: 99%

“…After the adsorption, the mixture was filtered through a syringe filter, and the Cu 2+ concentration was determined by ASS, which was then used for isotherm and kinetics model analyses. The adsorbed amount (q, mg•g −1 ) and metal removal efficiency (R, %) of Cu 2+ were subsequently calculated according to Equations ( 5) and (6), respectively [45,46].…”

Section: Adsorption Studies Of Cu 2+mentioning

confidence: 99%

Facile Synthesis of Nitrogen Self-Doped Porous Carbon Derived from Cicada Shell via KOH Activation for Simultaneous Detection and Removal of Cu2+

Zou

Liu

Yu³

et al. 2022

Molecules

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Sensitive detection and efficient removal of heavy metal ions with high toxicity and mobility are of great importance for environmental monitoring and control. Although several kinds of functional materials have been reported for this purpose, their preparation processes are complicated. Herein, nitrogen self-doped activated porous biochar (NAC) was synthesized in a facile process via an activation–carbonization strategy from cicada shell rich in chitin, and subsequently employed as an effective functional material for the simultaneous determination and removal of Cu2+ from aqueous media. With its unique porous structure and abundant oxygen-containing functional groups, along with the presence of heteroatoms, NAC exhibits high sensitivity for the electrochemical sensing of Cu2+ in concentrations ranging from 0.001 to 1000 μg·L−1, with a low detection limit of 0.3 ng·L−1. Additionally, NAC presents an excellent removal efficiency of over 78%. The maximum adsorption capacity is estimated at 110.4 mg/g. These excellent performances demonstrate that NAC could serve as an efficient platform for the detection and removal of Cu2+ in real environmental areas.

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“…Magnetic graphene oxide/CS [ 75 ], Fe 3 O 4 /CS/polyethylenimine [ 101 ], Fe 3 O 4 /CS NPs [ 90 ], CS/vanillin CS/ortho-vanillin [ 97 ], CS/bentonite [ 102 ], and TiO 2 /CS [ 94 ] were well fitted with Langmuir isotherm providing a suggestion of monolayer adsorption of various heavy metals.…”

Section: Waste Treatment and Purification Of Watermentioning

confidence: 99%

Recent Application Prospects of Chitosan Based Composites for the Metal Contaminated Wastewater Treatment

Gamage

Jayasinghe²,

Thiviya

et al. 2023

Polymers

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Heavy metals, known for their toxic nature and ability to accumulate and magnify in the food chain, are a major environmental concern. The use of environmentally friendly adsorbents, such as chitosan (CS)—a biodegradable cationic polysaccharide, has gained attention for removing heavy metals from water. This review discusses the physicochemical properties of CS and its composites and nanocomposites and their potential application in wastewater treatment.

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Insights into Effective Adsorption of Lead ions from Aqueous Solutions by Using Chitosan-Bentonite Composite Beads

Cited by 41 publications

References 53 publications

Speciation of Hexavalent Chromium in Aqueous Solutions Using a Magnetic Silica-Coated Amino-Modified Glycidyl Methacrylate Polymer Nanocomposite

Speciation of Hexavalent Chromium in Aqueous Solutions Using a Magnetic Silica-Coated Amino-Modified Glycidyl Methacrylate Polymer Nanocomposite

Facile Synthesis of Nitrogen Self-Doped Porous Carbon Derived from Cicada Shell via KOH Activation for Simultaneous Detection and Removal of Cu2+

Recent Application Prospects of Chitosan Based Composites for the Metal Contaminated Wastewater Treatment

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