Single and Binary System Dye Removal from Colored Textile Wastewater by a Dendrimer as a Polymeric Nanoarchitecture: Equilibrium and Kinetics

Mahmoodi, Niyaz Mohammad; Hayati, Bagher; Arami, Mokhtar; Mazaheri, Firoozmehr

doi:10.1021/je100248m

Cited by 107 publications

(32 citation statements)

References 64 publications

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“…These results revealed that the dye uptake increased with increasing temperature from 20 to 100 °C. In particular, as suggested from literature, at higher temperature, the mobility of dyes is expected to increase. Additionally, a swelling effect of the internal structure of the hydrogel occurs, enabling the large dye molecules to penetrate into the structure in higher quantities.…”

Section: Resultsmentioning

confidence: 64%

Polyamidoamine‐Based Hydrogel for Removal of Blue and Red Dyes from Wastewater

Rizzi

Fiorini

Lamanna

et al. 2018

Advanced Sustainable Systems

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One of the major problems related to the use of dyes in industrial applications is their elimination from the water or soil and eventually their recovery and reutilization. In this context, a new biocompatible material, previously considered suitable for biomedical applications, is presented for the first time, as an innovative adsorbent material for wastewater treatment. A polyamidoamine‐based hydrogel, prepared by Michael‐type polyaddition in water, is used for efficiently adsorbing two anionic toxic textile dyes from aqueous solutions. Several parameters affecting the adsorption process, such as the pH of solutions containing dyes, the amount of hydrogel and dyes, and the effect of temperature, are investigated. Moreover, the hydrogel dehydration and swollen conditions by using dye water solution are studied by Thermo‐Gravimetry (TG) and Differential Scanning Calorimetry (DSC) analyses, finding that the dehydration temperature plays a relevant role in determining the subsequent adsorbing behavior. The material characterization shows that the adsorption process can be attributed to a combination of electrostatic attraction and intermolecular interactions between hydrogel functional groups and the dye molecules. Visible absorption spectroscopy and Fourier Transform InfraRed‐Attenuated Total Reflectance (FTIR‐ATR) support the findings. The kinetics of the dye adsorption process are also evaluated, together with the adsorption isotherms.

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Section: Resultsmentioning

confidence: 64%

Polyamidoamine‐Based Hydrogel for Removal of Blue and Red Dyes from Wastewater

Rizzi

Fiorini

Lamanna

et al. 2018

Advanced Sustainable Systems

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“…The environmental problems related to the textile industry are numerous and well documented (Mahmoodi et al, 2010a;Mahmoodi et al, 2010b;Gottipati and Mishra, 2010;Lima et al, 2007;Epolito et al, 2005). Besides the removal of organic loads, blue color removal is one of the main objectives in the treatment of textile effluents.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of the Dye Reactive Blue 5g in Retorted Shale

Lambrecht

Barros

Arroyo

et al. 2015

Braz. J. Chem. Eng.

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-In this study the influence of the volumetric flow rate and feed concentration was investigated for the adsorption of the reactive dye Blue 5G. Experiments were carried out in a bed packed with retorted shale, at 30 o C. The ranges investigated were flow rate 2 -10 mL/min and the feed concentration 13-105 mg/L. Mathematical models were used to represent the dynamic sorption. The double resistance model considers the effects of the axial dispersion and the mass transfer resistance of the external film and inside the particles. As a result, the mass transfer coefficient of the external film and the internal mass transfer coefficient were estimated. The Thomas model was used to simulate the experimental data. In this model the fitted parameter was the adsorption kinetic constant. The first model provided an acceptable representation of the dynamic uptake of the reactive dye Blue 5G.

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“…Most of the dyes and pigments are harmful to aquatic and human life because of their toxic, carcinogenic, mutagenic and teratogenic properties [6]. Therefore, the government and concerned authorities have established various environmental standards on the quality of effluent before discharging into the environment and this constrained the industries to remove dyes from their effluents before discharging [7].…”

Section: Introductionmentioning

confidence: 99%