Epichlorohydrin Crosslinked 2,4-Dihydroxybenzaldehyde Schiff Base Chitosan@SrFe12O19 (EP-DBSB-CS@SrFe12O19) Magnetic Nanocomposite for Efficient Removal of Pb(II) and Cd(II) from Aqueous Solution

In this paper, new epichlorohydrin crosslinked 2,4-dihydroxybenzaldehyde Schiff base chitosan@SrFe 12 O 19 magnetic nanocomposite (EP-DBSB-CS@SrFe 12 O 19 ) was prepared from the reaction of epichlorohydrin, 2,4-dihydroxybenzaldehyde and chitosan (1:1:1 weight ratio) at the presence of SrFe 12 O 19 nanoparticles. The title compound EP-DBSB-CS@SrFe 12 O 19 was characterized by FT-IR, XRD, DSC, VSM, FE-SEM, EDS and map analysis and the results of all of them confirm that the successfully preparation of hard magnetic nanocomposite of EP-DBSB-CS@SrFe 12 O 19 with uniform distribution of all elements. In addition, the removal of Pb(II) and Cd(II) ions from aqueous solution using EP-DBSB-CS@SrFe 12 O 19 nanocomposite has been characterized and the effect of pH solution, shaking time and also sorbent dose on removal percentage were investigated. Adsorption results predicts that the maximum removal percentage, 98.5% for Pb(II) and 86% for Cd(II), was found to be at pH solution of 5 at the presence of 0.02 g sorbent and 90 min contact time. According to these results, we proposed adsorption process using magnetic EP-DBSB-CS@SrFe 12 O 19 nanocomposite to removal of other heavy metal such as Hg(II), Cu(II), Co(II), Cr(VI) and Ni(II).