Equilibrium Studies in Adsorption of Hg(II) from Aqueous Solutions using Biocompatible Polymeric Polypyrrole-Chitosan Nanocomposite

Salahi, S.; Parvini, Mehdi; Ghorbani, Mohsen

doi:10.1080/10406638.2014.886077

Cited by 14 publications

(7 citation statements)

References 25 publications

(24 reference statements)

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“…45 The values of ΔG°are all less than −40 kJ/mol, indicating that the adsorption of mercury ions by PPy-PANI/M-SBA-15 belongs to the chemical adsorption category. 46 However, the positive value of ΔH°reflects an endothermic property, which is consistent with the results obtained by the Langmuir model and the D−R model. 47 The positive value of ΔS°for mercury ions reveals that the increase of the randomness in the interface of the solid/solution and a high temperature is favorable for the adsorption of Hg(II).…”

Section: Kinetic Experimentssupporting

confidence: 90%

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Synthesis of Magnetic Short-Channel Mesoporous Silica SBA-15 Modified with a Polypyrrole/Polyaniline Copolymer for the Removal of Mercury Ions from Aqueous Solution

et al. 2021

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A novel magnetic short-channel mesoporous silica SBA-15 composite adsorbent was prepared by the copolymerization of pyrrole and aniline. The prepared novel nanoadsorbent polypyrrole–polyaniline/CoFe2O4-SBA-15 (PPy-PANI/M-SBA-15) has a significant adsorption effect on heavy metal mercury ions. The batch adsorption experiment was carried out to study the effects of various parameters including solution pH, initial concentration (C 0), adsorbent dose (dosage), temperature (T), and contact time on the adsorption effect. The analysis results of the response surface method (RSM) and central composite design (CCD) show that the importance for adsorption factors is pH > C 0 > T > dosage, and the maximum capacity of PPy-PANI/M-SBA-15 is 346.2 mg/g under the optimal conditions of pH = 6.7, T = 310 K, C 0 = 29.5 mg/L, and a dosage of 0.044 g/L. The pseudo-second-order kinetic model and the Langmuir isotherm model simulate the adsorption behavior of mercury ions. In addition, thermodynamic parameters indicate self-heating and reversible adsorption processes. A covalent bond is formed between the nitrogen-containing functional group and the mercury ions. Excellent magnetic properties and high reproducibility indicate that PPy-PANI/M-SBA-15 has excellent recyclability and environmentally friendly properties and can become a potential heavy metal ion adsorbent in practical applications.

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Section: Kinetic Experimentssupporting

confidence: 90%

“…The negative Δ G ° value confirms that the adsorption of PPy-PANI/M-SBA-15 toward Hg(II) ions is a spontaneous behavior . The values of Δ G ° are all less than −40 kJ/mol, indicating that the adsorption of mercury ions by PPy-PANI/M-SBA-15 belongs to the chemical adsorption category …”

Section: Resultsmentioning

confidence: 72%

Synthesis of Magnetic Short-Channel Mesoporous Silica SBA-15 Modified with a Polypyrrole/Polyaniline Copolymer for the Removal of Mercury Ions from Aqueous Solution

et al. 2021

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“…Among these methods; adsorption has increasingly received more attention due to simplicity, cost-effectiveness and high feasibility of industrial application without yielding harmful by-products. The most common adsorbent materials are rice husk ash [9], bio-char [10,11], cellulose [3,12], algal biomass [13], lignin [14,15], carbon nanotube [16], activated carbon [17,18], chitosan [19] polypyrrole [20] titanium oxide [21] and alginate [22]. However, these adsorbents described above suffer from low adsorption capacities and separation inconvenience.…”

Section: Introductionmentioning

confidence: 99%

Investigation of α‐iron oxide‐coated polymeric nanocomposites capacity for efficient heavy metal removal from aqueous solution

Talooki

Ghorbani

Ghoreyshi

2015

Polymer Engineering & Sci

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In the present study, PS@a-Fe 2 O 3 nanocomposites were prepared by chemical microemulsion polymerization approach and the ability of magnetic beads to remove Cu(II) ions from aqueous solutions in a batch media was investigated. Various physico-chemical parameters such as pH, initial metal ion concentration, temperature, and equilibrium contact time were also studied. Adsorption mechanism of Cu 21 ions onto magnetic polymeric adsorbents has been investigated using Langmuir, Freundlich, Sips and Redlich-Petersen isotherms. The results demonstrated that the PS@a-Fe 2 O 3 nanocomposite is an effective adsorbent for Cu 21 ions removal. The Sips adsorption isotherm model (R 2 > 0.99) was more in consistence with the adsorption isotherm data of Cu(II) ions compared to other models and the maximum adsorbed amount of copper was 34.25 mg/g. The adsorption kinetics well fitted to a pseudo second-order kinetic model. The thermodynamic parameters (DH8, DS8, and DG8) were calculated from the temperature dependent sorption isotherms, and the results suggested that copper adsorption was a spontaneous and exothermic process.

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“…The common wastewater plant treatment is not efficient in removing toxic compounds such as dyes from water [ 4 ]. For the removal and determination of these toxic dyes from industrial effluent, different physical and chemical techniques are used such as chemical oxidation, chemical precipitation, adsorption, photocatalysis, microbial or enzymatic treatment, natural sorbent materials [ 5 ], mineral composite, chemical oxidation, coagulation–flocculation, irradiation, adsorption, precipitation, membrane technologies, a combination of an aerobic and anaerobic and ion exchange processes [ 6 ]. Therefore, all of these techniques have some drawbacks and problems such as high cost, large solvent consumption, large analysis time and tough sample preparation, etc.…”

Section: Introductionmentioning

confidence: 99%

Selective Removal of the Emerging Dye Basic Blue 3 via Molecularly Imprinting Technique

et al. 2022

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A molecularly imprinting polymer (MIP) was synthesized for Basic Blue 3 dye and applied to wastewater for the adsorption of a target template. The MIPs were synthesized by bulk polymerization using methacrylic acid (MAA) and ethylene glycol dimethacrylate (EGDMA). Basic Blue 3 dye (BB-3), 2,2′-azobisisobutyronitrile (AIBN) and methanol were used as a functional monomer, cross linker, template, initiator and porogenic solvent, respectively, while non-imprinting polymers (NIP) were synthesized by the same procedure but without template molecules. The contact time was 25 min for the adsorption of BB-3 dye from 10 mL of spiked solution using 25 mg polymer. The adsorption of dye (BB-3) on the MIP followed the pseudo-second order kinetic (k2 = 0.0079 mg·g−1·min−1), and it was according to the Langmuir isotherm, with maximum adsorption capacities of 78.13, 85.4 and 99.0 mg·g−1 of the MIP at 283 K, 298 K and 313 K, respectively and 7 mg·g−1 for the NIP. The negative values of ΔG° indicate that the removal of dye by the molecularly imprinting polymer and non-imprinting polymer is spontaneous, and the positive values of ΔH° and ΔS° indicate that the process is endothermic and occurred with the increase of randomness. The selectivity of the MIP for BB-3 dye was investigated in the presence of structurally similar as well as different dyes, but the MIP showed higher selectivity than the NIP. The imprinted polymer showed 96% rebinding capacity at 313 K towards the template, and the calculated imprinted factor and Kd value were 10.73 and 2.62, respectively. In this work, the MIP showed a greater potential of selectivity for the template from wastewater relative to the closely similar compounds.

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Equilibrium Studies in Adsorption of Hg(II) from Aqueous Solutions using Biocompatible Polymeric Polypyrrole-Chitosan Nanocomposite

Cited by 14 publications

References 25 publications

Synthesis of Magnetic Short-Channel Mesoporous Silica SBA-15 Modified with a Polypyrrole/Polyaniline Copolymer for the Removal of Mercury Ions from Aqueous Solution

Synthesis of Magnetic Short-Channel Mesoporous Silica SBA-15 Modified with a Polypyrrole/Polyaniline Copolymer for the Removal of Mercury Ions from Aqueous Solution

Investigation of α‐iron oxide‐coated polymeric nanocomposites capacity for efficient heavy metal removal from aqueous solution

Selective Removal of the Emerging Dye Basic Blue 3 via Molecularly Imprinting Technique

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