Efficient Iodine Removal by Porous Biochar-Confined Nano-CuO/Cu: Rapid and Selective Adsorption of Iodide and Iodate Ions

Overview

Journal Nanomaterials (Basel)

Date 2023 Feb 11

PMID 36770537

Authors

Jiaqi Li

Mengzhou Wang

Xu Zhao

Zitong Li

Yihui Niu

Sufeng Wang

Qina Sun

Affiliations

Soon will be listed here.

Abstract

Iodine is a nuclide of crucial concern in radioactive waste management. Nanomaterials selectively adsorb iodine from water; however, the efficient application of nanomaterials in engineering still needs to be developed for radioactive wastewater deiodination. egg shells possess large surface groups and connecting pores, providing a new biomaterial to remove contaminants. Based on the egg shell-derived biochar (AES biochar) and in situ precipitation and reduction of cuprous, we synthesized a novel nanocomposite, namely porous biochar-confined nano-CuO/Cu (C-Cu). The characterization of C-Cu confirmed that the nano-CuO/Cu was dispersed in the pores of AES biochar, serving in the efficient and selective adsorption of iodide and iodate ions from water. The iodide ion removal by C-Cu when equilibrated for 40 min exhibited high removal efficiency over the wide pH range of 4 to 10. Remarkable selectivity towards both iodide and iodate ions of C-Cu was permitted against competing anions (Cl/NO/SO) at high concentrations. The applicability of C-Cu was demonstrated by a packed column test with treated effluents of 1279 BV. The rapid and selective removal of iodide and iodate ions from water is attributed to nanoparticles confined on the AES biochar and pore-facilitated mass transfer. Combining the advantages of the porous biochar and nano-CuO/Cu, the use of C-Cu offers a promising method of iodine removal from water in engineering applications.

Citing Articles

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