Removal of Methylene Blue Dye from Aqueous Solution using PDADMAC Modified ZSM-5 Zeolite as a Novel Adsorbent

Radoor, Sabarish; Karayil, Jasila; Jayakumar, Aswathy; Parameswaranpillai, Jyotishkumar; Siengchin, Suchart

doi:10.1007/s10924-021-02111-8

Cited by 21 publications

(9 citation statements)

References 70 publications

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“…After 1 min, adsorption capacity reached equilibrium and gradually decreased the following time. This was due to the dissolved ZL–CH dry hydrogels, becoming gel molecules, and the electrostatic interaction with AR88 particles decreased [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution

et al. 2022

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In the present study, we developed a new adsorbent product with zeolite crosslinked chitosan (ZL–CH hydrogel) to remove acid red 88 (AR88) in an aqueous solution. The effects of several factors, such as the comparison of ZL–CH hydrogel and the absence of chitosan, pH, adsorbent dosage, initial AR88 concentration, contact time, and ion strength, were determined. Obtained results showed that ZL–CH hydrogel improved AR88 removal compared to the absence of chitosan, with an adsorption capacity of 332.48 mg/g in equilibrium time of 1 min, and adding ionic strength had no significant effect. However, with optimal conditions at pH 2.0, dry ZL–CH became hydrogel due to protonation of amino and hydroxyl groups through hydrogen bonds in the AR88 solution. Volume fraction and interaction force decreased with increasing porosity, leading to an increase in adsorption capacity and swelling ratio. Experimental data of the adsorption process showed the Freundlich isotherm model. The equilibrium for adsorption and swelling kinetics studies showed and fitted a pseudo-second-order model. NaOH was successful as a desorbing agent with 93.8%, and it followed the pseudo-second-order kinetics model. The recycling process indicates great potential for AR88 removal.

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Section: Resultsmentioning

confidence: 99%

Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution

et al. 2022

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“…PDADMAC is a complexing agent that has been used to suppress the leaching of the dye from the polymeric matrices, mostly used in textile industry [ 28 ]. It prevents the migration of dye molecule from the matrix by the ionic interactions [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Polysaccharide-Based Halochromic Nanofibers via Needle-Less Electrospinning and Their Characterization: A Study of the Leaching Effect

2022

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Responsive materials, i.e., smart materials, have the ability to change their physical or chemical properties upon certain external signals. The development of nanofibrous halochromic materials, specifically combining the pH-sensitive functionality and unique nanofiber properties, could yield interesting new applications, especially when the common problem of dye leaching is successfully tackled. Therefore, in this article, we studied the fabrication process of polysaccharide-based halochromic nanofibrous materials by using a combination of various halochromic dyes (bromothymol blue, bromocresol green, and thymol blue) and cellulose acetate in a spinning solution using a one-pot strategy. The inhibition of leaching was addressed by using a complexing agent: poly-diallyl-dimethylammonium chloride (PDADMAC). The preparation of hybrid spinning solutions, their characterization, and ability to form continuous nanofibers were studied using a high production needle-less electrospinning system. The produced hybrid solutions and nanofibers were characterized, in terms of their rheological properties, chemical structure, morphology, and functionality. Fabricated nanofibrous halochromic structures show a clear color change upon exposure to different pH values, as well as the reduced leaching of dyes, upon the addition of a complexing agent. The leaching decreased by 61% in the case of bromocresol green, while, in the case of bromothymol blue and thymol blue, the leaching was reduced by 95 and 99%, respectively.

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“…2 Because of the adverse effect of dyes on water, their removal and purification are a global challenge. [3][4][5][6][7] Hence, the development of effective methods and materials for dye removal from wastewater is highly needed.…”

Section: Introductionmentioning

confidence: 99%

“…The most severe risk of industrial dyes is their resistance to degradation in natural environments and their adverse impact on the aquatic ecosystem 2 . Because of the adverse effect of dyes on water, their removal and purification are a global challenge 3–7 . Hence, the development of effective methods and materials for dye removal from wastewater is highly needed.…”

Section: Introductionmentioning

confidence: 99%