Highly Porous Poly(o-Phenylenediamine) Loaded Magnetic Carboxymethyl Cellulose Hybrid Beads for Removal of Two Model Textile Dyes

Arıca, Tuğçe A.; Balcı, Fadime Mert; Balci, Sinan; Arıca, M. Yakup

doi:10.1007/s12221-022-0221-4

Cited by 39 publications

(9 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This quantitative model is applicable to multilayer adsorption with nonuniform adsorption at high temperatures and affinity dispersion over the heterogeneous surface. This was originally created to demonstrate that the proportion of the adsorbate to the solute on a provided mass of the adsorbent was not consistent at different solution concentrations. , According to this viewpoint, the quantity adsorption is the total amount that has been adsorbed on all of the sites (each of which has bond energy), with the more powerful active sites being filled initially until the portion of adsorption energy has tremendously reduced after the procedure is complete. Freundlich’s equation is written as follows in the nonlinear form: q normale = K normalF C 1 / n …”

Section: Resultsmentioning

confidence: 99%

“…This was originally created to demonstrate that the proportion of the adsorbate to the solute on a provided mass of the adsorbent was not consistent at different solution concentrations. 51,52 According to this viewpoint, the quantity adsorption is the total amount that has been adsorbed on all of the sites (each of which has bond energy), with the more powerful active sites being filled initially until the portion of adsorption energy has tremendously reduced after the procedure is complete. Freundlich's equation is written as follows in the nonlinear form: AC, (c) MB on the silica aerogel (q e normalized to the surface area of AC), (d) CV on the silica aerogel (q e normalized to the surface area of AC), (e) MB on the TdS aerogel (q e normalized to the surface area of AC), and (f) CV on the TdS aerogel (q e normalized to the surface area of AC).…”

Section: Freundlich Adsorption Isothermmentioning

confidence: 99%

See 1 more Smart Citation

Thermodynamics of Azo Dye Adsorption on a Newly Synthesized Titania-Doped Silica Aerogel by Cogelation: A Comparative Investigation with Silica Aerogels and Activated Charcoal

et al. 2023

View full text Add to dashboard Cite

The adsorption isotherms of azo dyes on a newly synthesized titania-doped silica (TdS) aerogel compared to silica aerogels and activated charcoal (AC) are systematically investigated. Monolithic TdS aerogels were synthesized by the cogelation process followed by supercritical drying of tetraethyl orthosilicate (TEOS) as a gel precursor and titanium(IV) isopropoxide (TTIP) as a metal complex precursor for co-polymerization in ethanol solvent. An acid–base catalyst was used for the hydrolysis and condensation of TEOS and TTIP. The effect of Ti4+ doping in a silica aerogel on the mesoporous structure and the adsorption capacity of methylene blue (MB) and crystal violet (CV) dyes were evaluated from the UV–vis absorption spectra. In order to compare the adsorption isotherms, the surface areas of silica and TdS aerogels were first normalized with respect to AC, as adsorption is a surface phenomenon. The azo dye equilibrium adsorption data were analyzed using different isotherm equations and found to follow the Langmuir adsorption isotherm. The maximum monolayer adsorption capacities for the adsorbent TdS aerogel normalized with the AC of the Langmuir isotherm are 131.58 and 159.89 mg/g for MB and CV dyes, respectively. From the Langmuir curve fitting, the Q max value of the TdS aerogel was found to increase by 1.22-fold compared to AC, while it increased 1.25–1.53-fold compared to the silica aerogel. After four cycles, regeneration efficiency values for MB and CV dyes are about 84 and 80%, respectively. The study demonstrates the excellent potential and recovery rate of silica and TdS aerogel adsorbents in removing dyes from wastewater. The pore volume and average pore size of the new aerogel, TdS, were found to be lower than those of the silica aerogel. Thus, a new TdS aerogel with a high capacity of adsorption of azo dyes is successfully achieved.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Freundlich Adsorption Isothermmentioning

confidence: 99%

Thermodynamics of Azo Dye Adsorption on a Newly Synthesized Titania-Doped Silica Aerogel by Cogelation: A Comparative Investigation with Silica Aerogels and Activated Charcoal

et al. 2023

View full text Add to dashboard Cite

show abstract

“…[ 35 ] Recently, Bayramoglu and Arica's group used various grafted polymer for the removal of toxic textile dyes (organic pollutants) from aqueous medium. [ 36–38 ]…”

Section: Introductionmentioning

confidence: 99%

“…[35] Recently, Bayramoglu and Arica's group used various grafted polymer for the removal of toxic textile dyes (organic pollutants) from aqueous medium. [36][37][38] Dextrin is a very important member of water soluble polysaccharide. This is formed during the hydrolysis of starch to sugar by applying dry heat under acidic condition (pyrolysis) or by enzymes like amylases.…”

Section: Introductionmentioning

confidence: 99%

Dextrin‐graft‐poly(2‐dimethylamino ethyl acrylate‐co‐2‐acrylamido‐2‐methyl propane sulfonic acid) polymer: A potential adsorbent for the fast removal of nitrophenols from aqueous medium

Ray

Tripathy

2023

Polymer Engineering & Sci

View full text Add to dashboard Cite

A graft copolymer is synthesized by grafting a mixture of 2-(dimethylamino) ethyl acrylate (DMAEA) and 2-acrylamido-2-methyl propane sulfonic acid (AMPS) monomers onto the dextrin, polysaccharide backbone via free radical polymerization process using potassium peroxydisulfate (KPS) as radical initiator in aqueous phase. Various characterization techniques like 1 H and 13 C NMR, FT-IR, SEM, EDAX, and XRD analysis are used to characterize the copolymer. The polymer is used as an adsorbent for the removal of nitrophenols namely ortho-nitrophenol (ONP), para-nitrophenol (PNP), and 2,4-dinitrophenol (DNP) from their water solutions. Adsorption dynamics, kinetics, isotherms, and thermodynamics are studied. The maximum nitrophenol adsorption occurs at time 80 min, temperature 45 C, pH 3.5 (DNP), and 4.5 (ONP and PNP), polymer dose 30 mg/L. The nitrophenol adsorption data are well-fitted with the Langmuir isotherm model with maximum adsorption capacity (q m ) 215.26 mg g À1 for ONP, 223.60 mg g À1 for PNP, and 288.24 mg g À1 for DNP. The equilibrium kinetics follow pseudo-second-order kinetic model. Thermodynamic values unfold that the following nitrophenol adsorption onto the polymer surface is spontaneous and endothermic in nature. The value of Gibb's free energy for the nitrophenol adsorption is in the range of À6.5 to À9.5 kJ mol À1 . The preferential nitrophenol adsorption by the copolymer is followed in the order ONP

show abstract

“…The dynamic changes of adsorbate concentration in residual solution and swelling ratio of adsorbents were followed in literatures. [18][19][20] The ion releasing phenomena of hydrogels have been ignored during swelling and dye adsorption.…”

Section: Introductionmentioning

confidence: 99%

Soaking pretreatment of hydrogel adsorbent in distilled water to enhance efficiency of adsorption onto low concentration dye

Wang

et al. 2023

Polymer Engineering & Sci

View full text Add to dashboard Cite

To address the poor removal rate of low-concentration dye adsorption, the soaking pretreatment of hydrogel adsorbent in distilled water was suggested. In contrast to the conventional method of directly adding dried particles into dye solution, the purposed procedure involved adding an adsorbent into distilled water before transferring it into the dye solution. A hydrogel adsorbent based on P(AANa/AM) containing COONa groups was fabricated as an example for the hypothesis. The maximum adsorption capacity of P(AANa/AM) hydrogel adsorbent onto MB was 2455.45 mg/g under an initial MB concentration of 1000 mg/L. After two rounds of soaking pretreatment in distilled water, the clearance rate of 20 mg/L MB increased from 97.79% to 99.40%. Considering the hydrophilicity and ionization of COONa group, a high concentration of Na + was released into solution. Hydrogel soaked multiple times in fresh distilled water induced the continuous release of Na + into distilled water, although the swelling equilibrium was already achieved in the first soak. In dye adsorption and desorption experiments, the water absorption behavior was observed. Overall, this work revealed that the soaking pretreatment of hydrogel adsorbent in distilled water can enhance the removal rate of low concentration dye through adsorption.

show abstract

Highly Porous Poly(o-Phenylenediamine) Loaded Magnetic Carboxymethyl Cellulose Hybrid Beads for Removal of Two Model Textile Dyes

Cited by 39 publications

References 51 publications

Thermodynamics of Azo Dye Adsorption on a Newly Synthesized Titania-Doped Silica Aerogel by Cogelation: A Comparative Investigation with Silica Aerogels and Activated Charcoal

Thermodynamics of Azo Dye Adsorption on a Newly Synthesized Titania-Doped Silica Aerogel by Cogelation: A Comparative Investigation with Silica Aerogels and Activated Charcoal

Dextrin‐graft‐poly(2‐dimethylamino ethyl acrylate‐co‐2‐acrylamido‐2‐methyl propane sulfonic acid) polymer: A potential adsorbent for the fast removal of nitrophenols from aqueous medium

Soaking pretreatment of hydrogel adsorbent in distilled water to enhance efficiency of adsorption onto low concentration dye

Contact Info

Product

Resources

About