Adsorption of Cr(Ⅵ) on Montmorillonite modified by Starch and Lanthanum

<p>Industrial production brings serious Cr(Ⅵ) pollution problems, so as to explore new treatment methods for Cr(Ⅵ), In this paper, modified montmorillonite was prepared by modifying with starch and lanthanum nitrate, its adsorption mechanism effect on were explored. The monundonerization properties characterized Zeta potential, X-ray diffraction (XRD), Fourier Transform infrared spectroscopy (FTIR), scanning electron microscopy analysis(SEM). results showed that: Lanthanum-modified starch-modified lanthanum-modified have better effects 10 mg/L Cr(VI) polluted solution, which are 73.9% 58.6%, respectively, while Na-based has no capacity. Both only exist the surface of montmorillonite, can reduce overall electronegativity that ability adsorb Cr(VI), At same time, after nitrate is covered hydroxyl groups, it easy form coordination complexes anions, further enhances effect, provides a research idea direction removal Cr(VI).</p>