Novel Super Adsorbent Molecules, Carbon Nanotubes Modified by Dendrimer Miniature Structure, for the Removal of Trace Organic Dyes

Eskandarian, Ladan; Pajootan, Elmira; Arami, Mokhtar

doi:10.1021/ie502414t

Cited by 34 publications

(11 citation statements)

References 71 publications

(71 reference statements)

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“…The solutions were stirred for 24 h and the final pH was recorded. The pH in which the value of (pH i − pH f ) equals zero is known as pH ZPC [1].…”

Section: Methods Of Characterizationmentioning

confidence: 99%

“…The trends of diagrams in Fig. 5 show that the adsorption process is fast at initial stage, but then it becomes slow due to the development of repulsion forces between the adsorbed dye molecules on the surface of TS and the remaining dyes in bulk solution [1].…”

Section: Effect Of Ts Dosagementioning

confidence: 96%

“…According to the results from pH ZPC determination, the positively charged groups on the surface of TS are the dominant functional groups at low pH values and there is a strong electrostatic interaction between dye molecules and adsorbent, thus high values of removal (%) are achieved. But, in solutions at higher pH values, the number of negatively charged groups will increase and consequently, the repulsion forces between adsorbent and adsorbate will decrease the dye removal efficiency [1,21].…”

Section: Structural Characterization Of Adsorbentmentioning

confidence: 99%

“…In recent years, it has become a remarkable subject for the researchers working on the environmental issues and wastewater treatment. Among the various processes in this industry, dyeing and finishing procedures are the main sources of wastewater production [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The potential application of tomato seeds as low-cost industrial waste in the adsorption of organic dye molecules from colored effluents

Najafi¹,

Pajootan

Ebrahimi

et al. 2015

Desalination and Water Treatment

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A B S T R A C TThe objective of current study is to investigate the tomato seeds (TSs) as a low-cost industrial waste material to be employed in the adsorption of two acid dyes (C.I. Acid Red 14 (AR14) and C.I. Acid Blue 92 (AB92)). In this regard, field emission scanning electron microscope images, Fourier transform infrared analysis, and determination of isoelectric pH were used to characterize the surface morphology, functional groups, and surface charge of TS, respectively. Initial dye concentration, pH, and adsorbent dosage were studied as the key parameters that affect the adsorption performance. The isotherm, kinetic, and thermodynamic parameters of removal process were determined. It was found that the experimental data had followed the Langmuir isotherm model. The pseudo-second-order kinetic model described the rate of adsorption process properly. Temperature variation of adsorption process indicated that the removal of AR14 and AB92 by TS was an exothermic and spontaneous procedure. Finally, the cost analysis demonstrated that TS can be suggested as an effective and eco-friendly biosorbent for the removal of organic dyes from colored textile wastewaters.

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“…The solutions were stirred for 24 h and the final pH was recorded. The pH in which the value of (pH i − pH f ) equals zero is known as pH ZPC [1].…”

Section: Methods Of Characterizationmentioning

confidence: 99%

Section: Effect Of Ts Dosagementioning

confidence: 96%

Section: Structural Characterization Of Adsorbentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The potential application of tomato seeds as low-cost industrial waste in the adsorption of organic dye molecules from colored effluents

Najafi¹,

Pajootan

Ebrahimi

et al. 2015

Desalination and Water Treatment

Self Cite

View full text Add to dashboard Cite

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“…It is obvious that at the constant Den/TiO 2 dosage, the higher the initial phenol concentration, the lower the percentage of phenol removal. The resulted removal efficiency is acceptable (~85%) at phenol concentration of 20 mg/L, thus it was chosen as the optimum value for the phenol removal process [33].…”

Section: Effect Of Initial Phenol Concentrationmentioning

confidence: 99%

Application of dendrimer/titania nanohybrid for the removal of phenol from contaminated wastewater

Hayati

Arami

Maleki

et al. 2015

Desalination and Water Treatment

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In this study, polyamidoamine dendrimer of generation 4 was successfully immobilized on titania nanoparticles to synthesize a new nanohybrid (Den/TiO 2 ) with the capability of encapsulation for phenol removal from the polluted effluents. Characterizations of the adsorbent using SEM, TEM, XRD, and FTIR analyses indicated the successful immobilization of dendrimers onto the surface of titania. The effect of important parameters on removal efficiency such as retention time, pH, phenol concentration, Den/TiO 2 dosage, and temperature was investigated. The isotherm, kinetic, and thermodynamic parameters of the removal process were demonstrated, and the experimental data followed the Langmuir and pseudo-second-order model with high correlation coefficients. The calculated thermodynamic parameters showed that the removal of phenol using Den/TiO 2 was an endothermic and spontaneous process. The obtained results indicate that the prepared nanohybrid can be effectively used for the removal of phenol from industrial wastewaters.

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Preparation of a hydroxyethyl–titanium dioxide–carboxymethyl cellulose hydrogel cage and its effect on the removal of methylene blue

Han

Wang

2017

J of Applied Polymer Sci

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A novel TiO 2 hydrogel cage model was built for the removal of methylene blue (MB), an organic pollutant. This TiO 2 hydrogel cage was prepared with the biomass materials of hydroxyethyl cellulose (HEC) and carboxymethyl cellulose (CMC), and this hydrogel cage structure was characterized by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The contents of the encased TiO 2 and its swelling properties with different CMC proportions of this hydrogel cage were studied to obtain a suitable crosslinking network structure and optimal synthesis conditions. Compared to an equivalent amount of pure TiO 2 , the much higher removal efficiency of MB with our prepared TiO 2 hydrogel cage was attributed to the synergistic effect of the photocatalytic degradation for TiO 2 and the adsorption enrichment for cellulose hydrogels. Furthermore, the adsorption kinetics of the intraparticle diffusion model were used to study the adsorption enrichment process of the TiO 2 hydrogel cage. In addition, on the basis of the results of photocatalytic degradation and recycling experiments, excellent performances with respect to self-cleaning, regenerative ability, and easy recovery, were shown for this HEC-TiO 2 -CMC cage material, which demonstrated ideal application potential for MB removal.

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Novel Super Adsorbent Molecules, Carbon Nanotubes Modified by Dendrimer Miniature Structure, for the Removal of Trace Organic Dyes

Cited by 34 publications

References 71 publications

The potential application of tomato seeds as low-cost industrial waste in the adsorption of organic dye molecules from colored effluents

The potential application of tomato seeds as low-cost industrial waste in the adsorption of organic dye molecules from colored effluents

Application of dendrimer/titania nanohybrid for the removal of phenol from contaminated wastewater

Preparation of a hydroxyethyl–titanium dioxide–carboxymethyl cellulose hydrogel cage and its effect on the removal of methylene blue

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