Carboxylmethyl konjac glucomannan conjugated polydopamine composites for Pb (II) removal

Pan-pan Chen, Hong-ping Zhang, Jianping Ding, Xiao-yan Lin, Xiong Lu, Changsheng Liu, Youhong Tang

    Research output: Contribution to journalArticle

    30 Citations (Scopus)

    Abstract

    Carboxylmethyl konjac glucomannan conjugated polydopamine (CMKGM-PDA) composite was successfully prepared using a cost-effective method. CMKGM-PDA exhibited excellent adsorption performance for the removal of Pb(II) and could be a convenient agent for recovery. The Langmuir linear model was suitable for describing the adsorption process of Pb(II). The maximum adsorption capacity was 95.24 mg g −1 at 298 K, showing a high absorption capacity in comparison to similar absorbents. The pseudo-second order equation and intra-particle diffusion model exhibited good correlation with the adsorption kinetic. The thermodynamic values (ΔH0 > 0, ΔS0 > 0, ΔG0 < 0) indicated that the adsorption process of Pb(II) was endothermic, feasible, and spontaneous in nature. The chelation and electrostatic attraction between Pb(II) and –OH (or –NH 2 ) groups on the CMKGM-PDA formed a possible adsorption mechanism.

    Original languageEnglish
    Pages (from-to)62-70
    Number of pages9
    JournalCARBOHYDRATE POLYMERS
    Volume162
    DOIs
    Publication statusPublished - 2017

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