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Synthesis of reactive nanoscale zero valent iron using rectorite supports and its application for Orange II removal

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成果类型:
期刊论文
作者:
Luo, Si;Qin, Pufeng;Shao, Jihai;Peng, Liang;Zeng, Qingru;Gu, Ji-Dong
通讯作者:
Gu, JD
作者机构:
[Luo, Si; Qin, Pufeng; Shao, Jihai; Peng, Liang; Zeng, Qingru; Gu, Ji-Dong] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
[Gu, Ji-Dong] Univ Hong Kong, Sch Biol Sci, Lab Environm Microbiol & Toxicol, Hong Kong, Hong Kong, Peoples R China.
通讯机构:
[Gu, JD ] Univ Hong Kong, Sch Biol Sci, Lab Environm Microbiol & Toxicol, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China.
Univ Hong Kong, Sch Biol Sci, Lab Environm Microbiol & Toxicol, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China.
语种:
英文
关键词:
Zero valent iron;Rectorite;Nanocomposite;Orange II;Reduction
期刊:
Chemical Engineering Journal
ISSN:
1385-8947
年:
2013
卷:
223
页码:
1-7
基金类别:
Foundation of Furong Scholar project of Hunan Province; honoraryprofessorship (J-DG); Research Foundation of Education Bureau of HunanProvince, China [12C0153]
机构署名:
本校为第一机构
院系归属:
资源环境学院
摘要:
The nanoscale zero valent iron-rectorite (nZVI-R) composite was successfully synthesized through incorporation of nano-zero valent iron (nZVI) into the natural rectorite as supports. Iron ions were imbedded in the interlayer of rectorite clay via an ion-exchange reaction, and then the exchangeable Fe(III) cations were reduced to nZVI by NaBH<inf>4</inf> in solution. The confinement of Fe crystal growth in the interlayer regions of rectorite resulted in the formation of nZVI particles at ca. 10.3nm. The structure, morphology, Fe species, crystal phase, and elemental composition of the prepared nZVI-R composite materials were characterized using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS) and X-ray fluorescence (XRF). Comparing with the commercially available nZVI-Junye, nZVI prepared in laboratory (nZVI-Lab) and Na-rectorite, the synthesized nZVI-R composite in this study showed superior decolorization efficiency for Orange II with 0.2g of nZVI-R and a complete removal of Orange II achieved in less than 10min. On the basis of FT-IR spectra, the mechanism for nZVI-R in the discoloration of Orange II was also postulated. This nZVI-R composite has potential applications in cleaning up environmental contaminants such as organic dyes or halogen compounds. &copy;2012 Published by Elsevier B.V.

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