Quaternized chitosan/montmorillonite nanocomposite resin and its adsorption behavior

Abstract

resin without montmorillonite, and the adsorption capacity increased along with the increasing amount of montmorillonite. The maximum adsorption capacity of quaternized chitosan/montmorillonite nanocomposite resin was 478.5 mg g −1 and the adsorption behavior could be well described by the Langmuir and Freundlich adsorption isotherm model. Therefore, this study may provide a considerable and prospective material in the field of wastewater treatment.

Chitosan-g-poly(acrylic acid)-bentonite composite: a potential immobilizing agent of heavy metals in soil

“…The polymerization reaction between chitosan, AA and bentonite in the composite was confirmed by the disappearance of Si-O stretching vibration at 1032 cm −1 , and appearance of a new band at 1022 cm −1 . Overall, FTIR spectra of the materials indicated that Na-bentonite participated in the grafting copolymerization reaction through its active Si-OH groups (Paluszkiewicz et al 2011;Luo et al 2015).…”

“…Contrarily, owing to their metal chelating functional groups, the organic desorbing agents were able to remove up to 90% of the adsorbed metals. Hence, either EDTA or DTPA could be utilized for regenerating the composite when applied for water purification (Ngah et al 2013;Davari et al 2015;Luo et al 2015). On the other hand, a lower desorption of adsorbed metals from the composite in the presence of Ca(NO3)2 makes the material suitable for immobilizing metals in contaminated soils where an environmental electrolyte concentration always exists.…”

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

“…The dark lines pointed out the well delaminated nano-montmorillonite layers which were stabilized within the crosslinked polymer matrix, whereas the bright zone reflected the intercalated Chs matrix. Sizes were less than 100 nm, so it could be assumed that both prepared composites were nanocomposite materials [38][39][40].…”

Carboxymethyl starch-coated iron oxide magnetic nanoparticles: a potential drug delivery system for isoniazid

“…Figure 2 illustrates the diffractograms of isoniazid, MMT, CMS, iron oxide, and isoniazid-loaded CMS-coated iron oxide nanoparticles, respectively. Isoniazid showed multiple peaks at 2θ = 12-50° due to its crystallinity [17]. The characteristics peaks of MMT exhibited at 2θ = 9.4° and 27.3° assigned for (001) and (002) plane, respectively [25].…”

“…Montmorillonite (MMT) clay is smectite clay having silica tetrahedral sheets layered between alumina octahedral sheets [17]. Due to the special chemical structure having large surface area it gives good adsorbability, enhanced drug loading capacity and good mucoadhesivity property.…”