Cetyltrimethylammonium bromide intercalated and branched polyhydroxystyrene functionalized montmorillonite clay to sequester cationic dyes

Kenawy, El‐Refaie; Ghfar, Ayman A.; Wabaidur, Saikh Mohammad; Khan, Moonis Ali; Siddiqui, Masoom Raza; ALOthman, Zeid A.; Alqadami, Ayoub Abdullah; Hamid, Muhammad

doi:10.1016/j.jenvman.2018.04.121

Cited by 148 publications

(36 citation statements)

References 23 publications

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“…A similar tendency of pH effect was noticed for the CV adsorption on NaOH-modified rice husk [53]. In an acidic medium, the adsorption capacity of CV dye was low due to the protonation of adsorbent's active sites [54]. With rising pH of the solution, the adsorption process was increased significantly to 99.71 mg/g at pH 9 due to deprotonation of active sites of NAJL powder adsorbent, and the electrostatic attraction CV dye is attracted to these negatively charged groups on the surface of NAJL powder adsorbent [55].…”

Section: Effect Of Phsupporting

confidence: 72%

Effective adsorption of crystal violet from aqueous solutions with effective adsorbent: equilibrium, mechanism studies and modeling analysis

Al-Shehri¹,

Almudaifer

Alorabi

et al. 2021

Environmental Pollutants and Bioavailability

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In this work, NaOH-activated Aerva javanica leaf (NAJL) powder was successfully developed as a cost-effective adsorbent for removal of crystal violet (CV) from an aqueous environment. The prepared adsorbent was characterized using FTIR, SEM, and their surface area was determined by BET technique. Different parameters affecting the adsorption of CV dye such as pH solution, adsorbent dose, equilibrium time, initial CV concentration, and temperature were investigated. The results revealed that the best-optimized values were found as pH-9, dose-20 mg, time-30 min, temperature-25 °C . The adsorption experimental data exhibited excellently fitted well to the nonlinear Langmuir isotherm and Pseudo-first-order kinetic models. The maximum monolayer adsorption capacity of CV dye was 315.2 mg/g. The experimental parameters of thermodynamic analysis exhibited that the CV dye adsorption onto NAJL powder was exothermic and spontaneous. Electrostatic attraction, π-π interactions, and Hydrogen bonding were the mechanism behind the adsorption of CV dye.

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Section: Effect Of Phsupporting

confidence: 72%

Effective adsorption of crystal violet from aqueous solutions with effective adsorbent: equilibrium, mechanism studies and modeling analysis

Al-Shehri¹,

Almudaifer

Alorabi

et al. 2021

Environmental Pollutants and Bioavailability

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“…Adsorption processes are considered the most useful method because the advantages clearly outweigh the potential disadvantages [ 5 ]. In order to perform this process, many different adsorbents are being used, such as: activated carbon [ 6 ], chitosan [ 7 ], magnetic chitosan resins [ 8 ], magnetic thiourea-formaldehyde resins [ 9 ], silica [ 10 ], graphene [ 11 ], zeolite [ 12 ], Dowex resin [ 13 ], alginate beads [ 14 ], montmorillonite clay [ 15 ] and cyclodextrins [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1

et al. 2020

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Two cyclodextrins (CDs), γ– and hydroxypropyl (HP)–γ–CDs were used to synthesize new adsorbents by using epichlorohydrin (EPI) as cross-linking agent in order to remove Direct Red 83:1 (DR) from water. Both polymers were characterized in terms of Fourier spectroscopy, nuclear magnetic resonance, particle size distribution and thermogravimetric analysis. Experimental data for both polymers were well fitted to the pseudo-second order and intraparticle diffusion model, indicating that in the adsorption both chemical and physical interactions are essential in the removal of DR. Three different isotherm models were analyzed, concluding that γ–CDs–EPI followed the Temkin isotherm and HP–γ–CDs-EPI the Freundlich isotherm, these results suggested that the adsorption was happening onto heterogeneous surfaces. The results of the Gibbs free energy showed that the adsorption was spontaneous at room temperature. In order to eliminate the remaining dye after the polymer treatment, and advanced oxidation process (AOP) was considered, achieving more than 90% of removal combining both mechanisms.

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“…Moreover, there are weak peaks at 1672 and 1541 cm -1 which attribute to amide I and amide II, respectively [33]. In addition, montmorillonite displays peaks at 458 and 583 cm -1 corresponded to the Si-O-Mg and Si-O-Al bending frequencies, while a peak at 1013 cm -1 attributes to Si-O stretching vibrations [34][35][36]. As further seen in Fig.…”

Section: Ft-irmentioning

confidence: 99%

Adsorption of the anionic dye (Diamond Fast Brown KE) from textile wastewater onto chitosan/montmorillonite nanocomposites

et al. 2019

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A NOVEL nanocomposite chitosan/montmorillonite has been prepared by using two different weight ratios of nano-montmorillonite (Chs1 and Chs2). The structure of the prepared adsorbents has been characterized by Fourier transform infrared (FT-IR) spectroscopy, and transmission electron microscopy (TEM). The adsorption kinetics and isotherm behaviors of Diamond Fast Brown KE (DFB) dye molecules onto prepared chitosan nanocomposites had been studied and compared using pseudo-first, pseudo-second, and Langmuir, Freundlich, Dubinin _ Radushkevich models, respectively. The maximum adsorption capacities of DFB according to Langmuir isotherm model were 403.23 and 375.94 mg g-1 for Chs1 and Chs2, respectively. Moreover, our results indicate that the adsorption mechanism can be explained by the formation of the hydrogen bond. Based on the obtained results, Chs1 and Chs2 can be successfully applied for DFB dye removal from textile wastewater.

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Cetyltrimethylammonium bromide intercalated and branched polyhydroxystyrene functionalized montmorillonite clay to sequester cationic dyes

Cited by 148 publications

References 23 publications

Effective adsorption of crystal violet from aqueous solutions with effective adsorbent: equilibrium, mechanism studies and modeling analysis

Effective adsorption of crystal violet from aqueous solutions with effective adsorbent: equilibrium, mechanism studies and modeling analysis

Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1

Adsorption of the anionic dye (Diamond Fast Brown KE) from textile wastewater onto chitosan/montmorillonite nanocomposites

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