The key role of biochar in the rapid removal of decabromodiphenyl ether from aqueous solution by biochar-supported Ni/Fe bimetallic nanoparticles

Yunqiang YI, Juan WU, Yufen WEI, Zhanqiang FANG, Po Keung Eric TSANG

Research output: Contribution to journalArticles

5 Citations (Scopus)

Abstract

Some problems exist in the current remediation of polybrominated diphenyl ethers (PBDEs) from aqueous solution by using iron-based nanoparticles. Our efforts have contributed to the synthesis of biochar-supported Ni/Fe bimetallic nanoparticle composites (BC@Ni/Fe). Under the optimum operating parameters of BC@Ni/Fe, the morphologic analysis revealed that biochar effectively solved the agglomeration of Ni/Fe nanoparticles and the removal efficiency of BDE209 obtained by BC@Ni/Fe (91.29%) was seven times higher than the sum of biochar (2.55%) and Ni/Fe (11.22%) in 10 min. The degradation products of BDE209 in the solution and absorbed on the BC@Ni/Fe were analyzed with gas chromatography-mass spectroscopy, which indicated that the degradation of BDE209 was mainly a process of stepwise debromination. Meanwhile, compared with Ni/Fe nanoparticles, the adsorption ability of the by-products of BDE209 by BC@Ni/Fe was greater, to a certain extent, which reduced the additional environmental burden. In addition, the concentration of nickle ion leaching from the Ni/Fe nanoparticles was 3.09 mg/L; conversely, the concentration of nickle leaching from BC@Ni/Fe was not detected. This excellent performance in our study indicates a possible means to enhance the reactivity and reduce the secondary risks of Ni/Fe nanoparticles. Copyright © 2017 Springer Science+Business Media B.V.
Original languageEnglish
Article number245
JournalJournal of Nanoparticle Research
Volume19
Issue number7
DOIs
Publication statusPublished - Jul 2017

Citation

Yi, Y., Wu, J., Wei, Y., Fang, Z., & Tsang, E. P. (2017). The key role of biochar in the rapid removal of decabromodiphenyl ether from aqueous solution by biochar-supported Ni/Fe bimetallic nanoparticles. Journal of Nanoparticle Research, 19(7), Article 245. Retrieved August 3, 2017, from http://dx.doi.org/10.1007/s11051-017-3927-2

Keywords

  • Biochar
  • Ni/Fe bimetallic nanoparticles
  • Nano zero-valent iron
  • Polybrominated diphenyl ethers

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