Adsorptive removal of crystal violet dye by a local clay and process optimization by response surface methodology

Loqman, Amal; Bali, Brahim El; Lützenkirchen, Johannes; Weidler, Peter G.; Kherbeche, Abdelhak

doi:10.1007/s13201-016-0509-x

Cited by 33 publications

(12 citation statements)

References 55 publications

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“…However, developing the adsorbents with easy preparation, high efficiency, and low cost is still a challenge and problem in the application of antibiotic adsorption. And among adsorbents, activated carbon (AC) is applied widely, due to having large surface area, high adsorption capacity, and versatile selectivity (Loqman et al 2017). Although the use of AC to adsorb and remove antibiotics from aqueous environments has been investigated so far (Al-Othman et al 2012;El-Shafey et al 2012;Li et al 2015), their separation after treatment remains the main defect of such powdered AC or nanosize adsorbents, which may result in the generation of secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the activated carbon coated with multiwalled carbon nanotubes in removal of ciprofloxacin from aqueous solutions

et al. 2020

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Ciprofloxacin (CIP) is a commonly used antibiotic which is excreted in significant quantities and may likely be found in environments, especially wastewater. Thus, in the present study, we aimed to remove CIP from aqueous solutions using activated carbon supported with multivalent carbon nanotubes MWCNTs/AC. Herein, we prepared the MWCNTs/AC and the structural characterization of the adsorbent was performed using the BET, FTIR, and SEM methods. In order to obtain the optimal conditions of MWCNTs/AC activity, different experimental conditions including the pH, adsorbent dosage, contact time, initial CIP concentration, and temperature were examined. Afterward, to approach reality, the experiments were carried out under the optimal conditions using a sewage sample previously determined in terms of the BOD, COD, pH, EC, turbidity, and concentration of ciprofloxacin. Finally, the CIP levels were measured by HPLC. According to the results, the pH of 7, contact time of 30 min, adsorbent dosage of 20 mg/L, temperature of 40 °C, and initial CIP concentration of 20 mg/L were found to be the optimal conditions for MWCNTs/AC activity. In these conditions, the maximum removal efficiency of CIP from the synthetic and actual samples was 100% and 73%, respectively. Moreover, the adsorption behavior was in compliance with the pseudo-second-order, Freundlich isotherm kinetics. According to our findings, using MWCNTs/AC led to a considerable removal of CIP from the sewage samples. Thus, the use of this adsorbent is highly recommended in order to remove other antibiotics from water and wastewater.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the activated carbon coated with multiwalled carbon nanotubes in removal of ciprofloxacin from aqueous solutions

et al. 2020

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“…(7) was used. attributed to CH 3 deformation vibrations at 1441.24 cm -1 [45]. The peak located at 1006.27 cm -1 represents the valence vibrations of the Si-O bond [46,47].…”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…The absorbance band at 872.6 cm -1 corresponds to the presence of calcium carbonate CaCO 3 [48]. The vibration band at 697.64 cm -1 is assigned to the deformations of Si-O-Al [45]. The peak appeared at 611.91 cm -1 is attributed to the bonded Si-OH or Si-O (deformation) and/or Al-O (elongation) [45].…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Comparative investigation of indigo blue dye removal efficiency of activated carbon and natural clay in adsorption/ultrafiltration system

Missaoui¹,

Tahri²,

Daramola³

et al. 2019

Desalination and Water Treatment

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In the present study, indigo blue dye removal efficiency of activated carbon (AC) and natural clay (NC) was evaluated and compared, firstly in an adsorption unit, and then in an adsorption coupling ultrafiltration (A/UF) system. Effect of operating variables like pH, contact time, adsorbent dosage, initial dyes concentration during the adsorption was investigated and consequently optimised. The optimal conditions were employed for the adsorbents during the removal of the dye in the A/UF system. The optimal amount of NC and AC was 0.4 g/L and 0.3 g/L, respectively, and NC and AC displayed adsorption capacity of 57 mg/g and 53 mg/g, respectively, at this condition. Application of UF reveals a decrease of membrane fouling for both adsorbents in A/UF system. In addition, colour retention, when the adsorbents were used in A/UF, increased significantly from 90.5% to 99% as compared to using adsorption only. The efficiency of the membrane regeneration was estimated by the determination of the water permeability after rinsing. It is noteworthy to mention that a total regeneration of the membrane after the application of continous hybrid A/UF was achieved, however, the use of UF alone exhibited a fouling decrease by 40%.

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“…23 Response surface methodology (RSM) is a method proposed by Box and Wilson to obtain optimal conditions. 24,25 Compared with the traditional optimization method, RSM requires a limited number of experiments and is more convenient to operate. Moreover, RSM can obtain not only the influence of each variable on the dependent variable but also the influence of the interaction between two independent variables.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the removal of reactive golden yellow SNE dye by cross-linked cationic starch and its adsorption properties

Guo

Wang

Zheng

et al. 2019

Journal of Engineered Fibers and Fabrics

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In this study, cross-linked cationic starch was synthesized with corn starch as a raw material, epichlorohydrin as a cross-linked agent, and 3-chloro-2-hydroxypropyl trimethylammonium chloride as a cationic etherification agent, respectively, and it was characterized by X-ray photoelectron spectroscopy, X-ray powder diffraction, scanning electron microscopy, and thermogravimetry. The X-ray photoelectron spectroscopy results showed that cationic N appeared on the surface of cross-linked cationic starch; that is, a quaternary ammonium group was introduced. The X-ray powder diffraction results indicated that although the crystallinity of cross-linked cationic starch was lower than that of corn starch, cross-linked cationic starch still had an A-type crystal structure. The scanning electron microscopy results demonstrated that cross-linked cationic starch maintained a granular structure with small holes on the surface. Finally, the thermogravimetric results illustrated that the thermal stability of cross-linked cationic starch decreased. Before the adsorption experiment, the pHpzc of cross-linked cationic starch was obtained by the pH drift method, and it was 6.8. The optimal removal rate of reactive golden yellow SNE dye obtained by response surface methodology was 99.59%, and the optimal adsorption time, temperature, concentration of dye, and cross-linked cationic starch dosage were 14.3 min, 39°C, 100 mg/L, and 0.7 g/L, respectively. The adsorption of SNE by cross-linked cationic starch conformed to pseudo-second-order kinetics and the Langmuir isothermal adsorption model. The equilibrium adsorption capacity from pseudo-second-order kinetics and the maximum adsorption capacity from Langmuir isotherm model were 123.76 and 208.77 mg/g at 308.15 K, separately. In addition, this adsorption was an endothermic process.

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Adsorptive removal of crystal violet dye by a local clay and process optimization by response surface methodology

Cited by 33 publications

References 55 publications

Evaluation of the activated carbon coated with multiwalled carbon nanotubes in removal of ciprofloxacin from aqueous solutions

Evaluation of the activated carbon coated with multiwalled carbon nanotubes in removal of ciprofloxacin from aqueous solutions

Comparative investigation of indigo blue dye removal efficiency of activated carbon and natural clay in adsorption/ultrafiltration system

Optimization of the removal of reactive golden yellow SNE dye by cross-linked cationic starch and its adsorption properties

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