Adsorption dynamics of Congo red dye removal using ZnO functionalized high silica zeolitic particles

Madan, Shubhangi; Shaw, Ruchi; Tiwari, Sangeeta; Tiwari, Sandeep

doi:10.1016/j.apsusc.2019.04.273

Cited by 158 publications

(53 citation statements)

References 52 publications

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“…44 MF (mechanical stirring) respectively. A similar study has been performed by Madan et al, 58 who reported the CR removal to be increasing when adsorbent dose of synthesized adsorbent was increased. 58…”

Section: Effect Of Activated Carbon Dosage On Adsorption Capabilitysupporting

confidence: 73%

“…So, after the cavities got fully occupied leading to inability of adsorbents to have more affinity toward dye molecules. 58 Hence, 120 min was analyzed to be the optimum contact time for CR dye adsorption. Similar observation has been reported by Liu M et al 59 who evaluated the removal characteristics with varying contact time effect and reported alike results that after an optimum contact time almost static removal behavior was observed.…”

Section: Infrared Spectroscopy Of Synthesized Adsorbentsmentioning

confidence: 99%

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Ultrasonic treatment of textile dye effluent utilizing microwave‐assisted activated carbon

Maheshwari

Solanki

Ridoy

et al. 2020

Env Prog and Sustain Energy

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Porous microwave irradiated activated carbon has been developed and its application for time efficient ultrasonic treatment of Congo‐red (CR) dye. The maximum removal efficiency of 97.73% was obtained using developed adsorbent with ultrasound treatment. The optimum parameters for maximum dye removal were obtained that is, contact time of 2 hr, adsorbent dose of 0.2 g, neutral pH, room temperature, and initial CR‐effluent concentration of 10 mg/l. Adsorption isotherms models, kinetics of the process, and thermodynamic analysis have been evaluated to investigate the adsorption performance. The pseudo second order rate kinetics (R2 = 0.99) and Langmuir equilibrium isotherm (R2 = 0.99) were well fitted to the experimental data. It has been found that microwave synthesized method was better technique in terms of energy savings, and ultrasonic treatment approach was efficient technique in terms of operational time. The combination of microwave‐ultrasonic reported to have an adsorptive capacity of 75.75 mg/g with least energy‐cost consuming approach.

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Section: Effect Of Activated Carbon Dosage On Adsorption Capabilitysupporting

confidence: 73%

Section: Infrared Spectroscopy Of Synthesized Adsorbentsmentioning

confidence: 99%

Ultrasonic treatment of textile dye effluent utilizing microwave‐assisted activated carbon

Maheshwari

Solanki

Ridoy

et al. 2020

Env Prog and Sustain Energy

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“…Clay, and in particular kaolin, has been recognized as one of the most problematic minerals in the wastewater treatment of different industries due to the formation of highly stable suspensions and challenging separations. [1][2][3] In this context, the stability of kaolin suspension is stemmed from the colloidal size, anisotropic shape, and the negatively charged basal faces of kaolin particles. [4,5] As kaolin particles carry slightly negative charges, cationically charged polymers are generally used for the flocculation of kaolin particles in suspensions.…”

Section: Introductionmentioning

confidence: 99%

“…Flocculation processes have great uses in many industrial applications, such as water and wastewater treatment, mineral recovery, and paper manufacturing. Clay, and in particular kaolin, has been recognized as one of the most problematic minerals in the wastewater treatment of different industries due to the formation of highly stable suspensions and challenging separations . In this context, the stability of kaolin suspension is stemmed from the colloidal size, anisotropic shape, and the negatively charged basal faces of kaolin particles .…”

Section: Introductionmentioning

confidence: 99%

Polarity of Cationic Lignin Polymers: Physicochemical Behavior in Aqueous Solutions and Suspensions

Sabaghi

Fatehi

2020

ChemSusChem

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The structure of cationic monomers can significantly impact the polarity of lignin after polymerization. Cationic hydrolysis lignin (CHL) polymers were produced by polymerizing hydrolysis lignin (HL) with [3‐(methacryloylamino)propyl] trimethylammonium chloride (MAPTAC) or [2‐(methacryloyloxy)ethyl] trimethyl ammonium chloride (METAC). The METAC monomer has an oxygen atom, with larger electronegativity, in its molecular structure, whereas the MAPTAC monomer contains a nitrogen atom, as well as an extra nonpolar CH2 group, facilitating investigation into the effects of the polarity of CHLs on their physicochemical performance in an aqueous system. CHL polymers are analyzed and their interactions with clay particles are determined in colloidal systems. CHLs are designed to have similar charge densities (2.1–2.2 mmol g−1) and molecular weights (55000–60000 g mol−1 ). The hydrodynamic radius (Hy) and radius of gyration, (Rg) of HL‐METAC are larger than those of HL‐MAPTAC, implying a more 3‐dimensional structure of HL‐METAC in aqueous solution. The stability ratio of kaolin particles affirms the better performance of HL‐METAC in comparison to HL‐MAPTAC, which reflects the better flocculation efficiency of HL‐METAC. The results also reveal that salt and urea aqueous solutions affect the Hy, Rg, and configuration of CHL polymers, which alters the flocculation efficiency of HL‐METAC and HL‐MAPTAC polymers in kaolin suspensions.

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“…The adsorption isotherm is fundamental for understanding the adsorption mechanism [55]. An adsorption isotherm shows the amount of a particular solute adsorbed to an adsorbent surface, depending on the equilibrium concentration of the solute [56].…”

Section: Balance Study and Thermodynamic Parametersmentioning

confidence: 99%

Removal of Remazol Black B dye using bacterial cellulose as an adsorbent

et al. 2021

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Effluents from textile processes, when discarded of inappropriately, have been shown to be a major environmental concern. In this way, different methods can be used, among them adsorption is an economical and efficient technique in the removal of dyes. Therefore, we propose to analyze the adsorptive capacity of bacterial cellulose (CB) against effluents containing the dye Remazol Black B (RBB). CB was produced by the bacterium Gluconacetobacter hansenii and characterized by the techniques of FTIR, DRX, TGA / DTG and pH (PCZ). The RBB removal tests were initially performed at different pHs. From the best experimental condition, new tests were performed at temperatures of 30, 40, 60 and 100 ± 2 °C, 150 rpm, pH 3.5, using 0.5 g of adsorbent in the concentrations of dye from 25 to 65 mg•L -1 . The kinetic study showed that the system balance was achieved in 80 minutes. The experimental data were better described by the pseudosecond order model. The equilibrium results showed that the experimental data fit the Langmuir model (qmax 17.513 mg•g -1 ). The thermodynamic parameters of adsorption showed that the process is exothermic, not spontaneous and also presented low system randomness. The activation energy (Ea) was 23.8 kJ•mol -1 characterizing physical adsorption. The residual water was not toxic to animal or microbial cells. Bacterial cellulose proved to be a good low-cost adsorbent, easy to acquire and which can be used in the adsorption process.

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Adsorption dynamics of Congo red dye removal using ZnO functionalized high silica zeolitic particles

Cited by 158 publications

References 52 publications

Ultrasonic treatment of textile dye effluent utilizing microwave‐assisted activated carbon

Ultrasonic treatment of textile dye effluent utilizing microwave‐assisted activated carbon

Polarity of Cationic Lignin Polymers: Physicochemical Behavior in Aqueous Solutions and Suspensions

Removal of Remazol Black B dye using bacterial cellulose as an adsorbent

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