Removal of azoic dyes from aqueous solutions by chitosan enhanced ultrafiltration

Fradj, Anouar Ben; Boubakri, Ali; Hafiane, Amor; Hamouda, Sofiane Ben

doi:10.1016/j.rechem.2019.100017

Cited by 41 publications

(33 citation statements)

References 30 publications

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“…Fradj et al reported the fabrication of polymer enhanced ultrafiltration (PEUF) cellulose membrane using chitosan (CHI) as chelating polymer and its ability to separate azoic dyes (methyl orange (MO) and Direct Blue 71 (DB71)) from their aqueous solutions against applied pressure in the range of 0–4 bar [ 111 ]. CHI enhanced ultrafiltration showed retention rate and permeate flux of 86%, 37.…”

Section: Biopolymer-based Dye Removal Technologiesmentioning

confidence: 99%

Recent Advances in Biopolymer-Based Dye Removal Technologies

2021

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Synthetic dyes have become an integral part of many industries such as textiles, tannin and even food and pharmaceuticals. Industrial dye effluents from various dye utilizing industries are considered harmful to the environment and human health due to their intense color, toxicity and carcinogenic nature. To mitigate environmental and public health related issues, different techniques of dye remediation have been widely investigated. However, efficient and cost-effective methods of dye removal have not been fully established yet. This paper highlights and presents a review of recent literature on the utilization of the most widely available biopolymers, specifically, cellulose, chitin and chitosan-based products for dye removal. The focus has been limited to the three most widely explored technologies: adsorption, advanced oxidation processes and membrane filtration. Due to their high efficiency in dye removal coupled with environmental benignity, scalability, low cost and non-toxicity, biopolymer-based dye removal technologies have the potential to become sustainable alternatives for the remediation of industrial dye effluents as well as contaminated water bodies.

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Section: Biopolymer-based Dye Removal Technologiesmentioning

confidence: 99%

Recent Advances in Biopolymer-Based Dye Removal Technologies

2021

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“…The participation of an ultrafiltration membrane is an important parameter in PEUF. 11 It is necessary to know if an ultrafiltration membrane is utilized in the removal of MB without the polymer (blank experiment). The effect of MWCO on MB removal was investigated with 10 mg L −1 MB at pH 8.0 in the absence of the SA biopolymer.…”

Section: Effect Of the Molecular Weight Cutoff Of The Membrane On Mb Removalmentioning

confidence: 99%

“…The retention of MB in the absence of WSP is attributed to an adsorption phenomenon on the surface or in the pores of the membrane. 11 All subsequent studies were conducted at 10 kDa.…”

Section: Effect Of the Molecular Weight Cutoff Of The Membrane On Mb Removalmentioning

confidence: 99%

“…4,6 Prolonged exposure of humans to these pollutants causes negative effects on health, such as, carcinogenesis and mutagenesis. 4,10,11 Methylene blue (MB) dye is a cationic dye with a delocalized positive charge in its heterocyclic molecular structure. 9 It is widely used at the industrial level, mainly in the chemical, biological, medical and dye industries, due to its various applications.…”

Section: Introductionmentioning

confidence: 99%

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Use of sodium alginate biopolymer as an extracting agent of methylene blue in the polymer‐enhanced ultrafiltration technique

Oyarce

Santander

Butter

et al. 2021

J of Applied Polymer Sci

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In this study, the removal of methylene blue (MB) cationic dye from an aqueous solution was investigated using the polymer-enhanced ultrafiltration (PEUF) technique with sodium alginate (SA) as an extracting soluble polymer, in combination with an ultrafiltration membrane of regenerated cellulose with a 10 kDa molar mass cut-off. SA was characterized via Fourier-transform infrared spectroscopy and thermogravimetric analysis. For ultrafiltration studies, the washing method was used to evaluate various experimental variables, such as the pH, SA dose and initial MB concentration, and adsorption isotherms to identify the optimal adsorption conditions. Finally, the regeneration of the SA polymer was evaluated in five consecutive cycles of adsorption-desorption of MB. In the obtained characterization results, the structural composition of SA and the characteristic thermal stability of the polymer were verified. The PEUF results demonstrated that a retention capacity of 98% of the MB was realized at pH 8.0 using 0.025 g of SA at an initial optimal MB concentration of 50 mg L −1 . It is possible to observe that the Freundlich model better explain the interaction between the dye and the polymer surface. According to the results is demonstrated the regeneration capacity of the polymer and its subsequent reuse.

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“…Tangential operation can provide stable ow rates, but still requires cleaning of the installations from time to time. This mode of ltration is expensive, hence the interest of immersed membranes which combine both tangential and frontal modes (Fradj et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Sulfhydryl groups as potential biomarkers of water pollution

Romdhani¹,

Alhalili²,

Elarbaoui³

et al. 2021

Preprint

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Thiols represent a source of environmental pollution especially wastewater. The present work aims to evaluate the degradation of sulfur in two biological treatment plants in Tunisia: conventional plant of Rades Malienne, and vertical and horizontal flow from the Grombalia plant. We analyzed (1) wastewater properties, (2) the hydrosulfur (thiol) group, (3) membrane processes ultrafiltration technique and (4) characterization of the quality of wastewater from different plants. We used ultrafiltration membrane assisted ZnO and TiO2 NPs application on real effluents from different biological treatment plants. STEP1 is found to be more loaded with sulphur. Application of AC-ZnO membrane gives 99.07% and 99.55% of sulfur removal from wastewater of STEP1 and STEP3. STEP3 is 50 times less charged on sulfur than STEP1. We suggested that when the sulphur content is high, this leads to an increase in mineral elements. This could be explained by the interactions between thiols and the major elements that cause mineral pollution.

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Removal of azoic dyes from aqueous solutions by chitosan enhanced ultrafiltration

Cited by 41 publications

References 30 publications

Recent Advances in Biopolymer-Based Dye Removal Technologies

Recent Advances in Biopolymer-Based Dye Removal Technologies

Use of sodium alginate biopolymer as an extracting agent of methylene blue in the polymer‐enhanced ultrafiltration technique

Sulfhydryl groups as potential biomarkers of water pollution

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