Kinetics, thermodynamics, and equilibrium of As(III), Cd(II), Cu(II) and Pb(II) adsorption using porous chitosan bead-supported MnFe2O4 nanoparticles

International Journal of Mining Science and Technology

卷:31

Hongbing Ji¹  Juan Zhong²  Yi Luo²  Lei Wang³  Xiaokui Che³  Xinglan Cui⁴  Qidong Zhang⁵  Hongxia Li⁶  Rongzhen Jin⁶ 

[1] Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollution, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;

[2] Corresponding authors.;

[3] GRIMAT Engineering Institute Corporation Limited, Beijing 100088, China;

[4] GRINM Group Corporation Limited, Beijing 100088, China;

[5] National Engineering Research Center for Environment-friendly Metallurgy in Producing Premium Non-ferrous Metals, GRINM Resources and Environmental Technology Corporation Limited, Beijing 101407, China;

关键词: Equilibrium;    Adsorption;    Arsenic;    Cadmium;    Chitosan;    MnFe2O4 nanoparticles;   

DOI  :  

来源: DOAJ

【 摘 要 】

A novel porous nanocomposite, cross-linked chitosan and polyethylene glycol (PEG) bead-supported MnFe2O4 nanoparticles (CPM), was developed as an efficient adsorbent to remove metalloid (As(III)) and heavy metals (Cd(II), Cu(II), and Pb(II)). The characteristics of CPM showed a porous structure, well dispersed MnFe2O4, and several of hydroxyl and amino groups (OH, NH2). Batch experiments demonstrated that the best adsorption property of As(III), Cd(II), Cu(II), and Pb(II) was achieved within 8 h with maximum adsorption capacities of 9.90, 9.73, 43.94, and 11.98 mg/g, respectively. Competitive and synergistic effects (particularly precipitation) were included in the co-adsorption mechanism of As(III) and heavy metals. Thereinto, As(III) was partly oxidized by MnFe2O4 to As(V), and both were coordinated on MnFe2O4 nanoparticles. Pb(II) could also bind to MnFe2O4 by ion exchange and electrostatic attraction. Furthermore, Cd(II) and Cu(II) tended to be coordinated on chitosan. Therefore, CPM can serve as a remediation material for water and soil co-contaminated with As(III) and heavy metals.

【 授权许可】

Unknown