Removal of Pb(II) ions from aqueous media using epichlorohydrin crosslinked chitosan Schiff's base@Fe3O4 (ECCSB@Fe3O4)

Novel magnetically separable anhydride-functionalized Fe3O4@SiO2@PEI-NTDA nanoparticles as effective adsorbents: synthesis, stability and recyclable adsorption performance for heavy metal ions

“…23 Polyethylenimine (PEI), a hydrophilic polymer, has also been frequently used to improve the adsorption properties of materials towards metal ions because of the abundant functional amine groups in its structure. 24 PEI has usually been graed to other matrices such as insoluble polymers, 25 biomass, 26 and cellulose 27 to prevent its dissociation from the surface of the matrices during adsorption operations; it has also been used to construct magnetic hybrid nanomaterials for environmental applications in heavy metal ion removal. [28][29][30] In this work, to synthesize a magnetically separable adsorbent with high stability and adsorption capacity, a new type of magnetic silica material with amine and anhydridefunctionalized layers was fabricated by covalently graing a PEI polymer, followed by anhydride functionalization with 1,4,5,8-naphthalenetetracarboxylic-dianhydride (NTDA) onto the surface of Fe 3 O 4 @SiO 2 , as shown in Scheme 1.…”

Industrial Application of Chitosan as Promising Material for Wastewater Purification: A Review

“…As an adsorbent, chitosan can be applied alone or in combination with other suitable materials to increase its effectiveness. The function of chitosan as an adsorbent is to absorb harmful substances and colors (Hui et al, 2018;Markandeya et al, 2017;Nitayaphat, 2017;Nuralam, Endoraza & Arbi, 2012;Shaida et al, 2018) that can be improved by using a combination of materials such as activated coconut shell charcoal, chitosan-silica bead (Susilowati, Endang & Mahatmanti, 2018), chitosan-rubber (Phasuphan et al, 2019), chitosan-Fe3O4 salt (Liu et al, 2016), chitosan-epichlorohydrin (Yan et al, 2018), chitosan-carbon (Yong-hong Huang, 2018), and chitosan-lignin (Nair et al, 2014).…”

“…A summarized list of those aforementioned metal ion waste adsorbed by chitosan can be seen in Table 1 below. (Dima et al, 2015;Feng et al, 2019;Yimin Huang et al, 2018;Kim et al, 2015;Lasindrang et al, 2015;Nair et al, 2014;Noralia & Dina Kartika, 2013;Samuel et al, 2019;Zulfi et al, 2014) Cs + (Wang et al, 2019;Yang et al, 2016) Pb (II) (Nuralam, Endoraza & Arbi, 2012;Susilowati, Endang & Mahatmanti, 2018;Utami, Umi Barorh Lili Irawati, Utami, 2011;Yan et al, 2018;Zhang et al, 2018) Fe (Hui et al, 2018;Nuralam, Endoraza & Arbi, 2012;Nurdin & Maulana, 2016) Cu (II) (Dandil et al, 2019;Liu et al, 2016;Susilowati, Endang & Mahatmanti, 2018)…”

Epichlorohydrine crosslinked chitosan cinnamaldehyde Schiff base: Synthesis, characterization, thermal studies and its application in adsorption of methyl green

“…The maximum adsorption capacity has been found to be 189.44 mg/g.Ke et al [11] reported methyl green removal from wastewater using the modi ed chitosan by quaternary ammonium salt. We can modify chitosan using various crosslinking agents such as terephthaldehyde [15], glutaric acid [16] and epichlorohydrine [17], to improve its mechanical performance.…”