Multifold enhanced synergistic removal of nickel and phosphate by a (N,Fe)-dual-functional bio-sorbent: Mechanism and application.

Title Multifold enhanced synergistic removal of nickel and phosphate by a (N,Fe)-dual-functional bio-sorbent: Mechanism and application.
Authors Y.H. Zhang; F.Q. Liu; C.Q. Zhu; X.P. Zhang; M.M. Wei; F.H. Wang; C. Ling; A.M. Li
Journal J Hazard Mater
DOI 10.1016/j.jhazmat.2017.01.054
Abstract

A novel (N,Fe)-dual-functional biosorbent (N/Fe-DB) capable of efficient synergistic removal of Ni(II) and H2PO4(-) from aqueous solution was synthesized. The adsorption capacities of Ni(II) and H2PO4(-) were both remarkably enhanced over 3 times compared with those in single systems. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed that complexation of amino groups and ligand exchange of hydrous ferric oxide in N/Fe-DB played dominant roles. The electric double layer compressing and chelating ligand of deprotonated H2PO4(-) accounted for the enhanced removal of Ni(II) in binary system, while cation bridge interaction promoted uptake of H2PO4(-). Furthermore, the coadsorbates were sequentially recovered, with the ratios of more than 99.0%. Besides, the recovered N/Fe-DB remained stable and applicable to the treatment of real electroplating wastewater even after six adsorption-regeneration cycles. Since the electroplating industry is springing up, effective control of heavy metals and phosphate has attracted global concerns. Based on the enhanced coremoval properties and superb regenerability, N/Fe-DB is potentially applicable to practical production.

Citation Y.H. Zhang; F.Q. Liu; C.Q. Zhu; X.P. Zhang; M.M. Wei; F.H. Wang; C. Ling; A.M. Li.Multifold enhanced synergistic removal of nickel and phosphate by a (N,Fe)-dual-functional bio-sorbent: Mechanism and application.. J Hazard Mater. 2017;329:290298. doi:10.1016/j.jhazmat.2017.01.054

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