Remediation of polybrominated diphenyl ethers in soil using Ni/Fe bimetallic nanoparticles: Influencing factors, kinetics and mechanism

Yingying XIE, Zhanqiang FANG, Wen CHENG, Po Keung Eric TSANG, Dongye ZHAO

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Polybrominated diphenyl ethers (PBDEs) are commonly used as additive flame retardants in all kinds of electronic products. PBDEs are now ubiquitous in the environment, with soil as a major sink, especially in e-waste recycling sites. This study investigated the degradation of decabromodiphenyl ether (BDE209) in a spiked soil using Ni/Fe bimetallic nanoparticles. The results indicated that Ni/Fe bimetallic nanoparticles are able to degrade BDE209 in soil at ambient temperature and the removal efficiency can reach 72% when an initial pH of 5.6 and at a Ni/Fe dosage of 0.03 g/g. A declining trend in degradation was noticed with decreasing Ni loading and increasing of initial BDE209 concentration. The degradation products of BDE209 were analyzed by GC-MS, which showed that the degradation of BDE209 was a process of stepwise debromination from nBr to (n − 1)Br. And a possible debromination pathway was proposed. At last, the degradation process was analyzed as two-step mechanism, mass transfer and reaction. This current study shows the potential ability of Ni/Fe nanoparticles to be used for removal of PBDEs in contaminated soil. Copyright © 2014 Elsevier B.V.
Original languageEnglish
Pages (from-to)363-370
JournalScience of the Total Environment
Volume485-486
DOIs
Publication statusPublished - Jul 2014

Fingerprint

Halogenated Diphenyl Ethers
PBDE
Remediation
Ethers
remediation
Nanoparticles
Soils
Degradation
kinetics
degradation
Kinetics
decabromobiphenyl ether
soil
Flame Retardants
ether
mass transfer
Flame retardants
Recycling
Mass transfer
nanoparticle

Citation

Xie, Y., Fang, Z., Cheng, W., Tsang, P. E., & Zhao, D. (2014). Remediation of polybrominated diphenyl ethers in soil using Ni/Fe bimetallic nanoparticles: Influencing factors, kinetics and mechanism. Science of the Total Environment, 485-486, 363-370.

Keywords

  • Soil
  • Polybrominated diphenyl ethers
  • Ni/Fe bimetallic nanoparticles
  • Degradation
  • Mechanism