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Reduction of nitrobenzene by a zero-valent iron microspheres/polyvinylidene fluoride (mZVI/PVDF) membrane
Yang, Chengfeng; Li, Kuiling; Xu, Lili; Wang, Zhiyong; Yu, Ling; Wang, Jun
2022-02-01
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume282Issue:0Pages:120006
AbstractZero-valent iron microparticle (mZVI) is an excellent reductant for nitroaromatic compounds (NACs). However, it still faces severe challenges including easy agglomeration, oxidation, loss and difficult reuse. To overcome these drawbacks, a zero-valent iron microspheres/polyvinylidene fluoride (mZVI/PVDF) composite membrane using non-solvent induced phase separation (NIPS) method was constructed. Compared with bare mZVI, the mZVI/PVDF composite membrane limited agglomeration and oxidation of mZVI and slowed down the loss of mZVI and resultant iron (hydr)oxide, which made it maintain 100% nitrobenzene (NB) degradation in eight cycles. In the 1st use of mZVI/PVDF composite membrane, the NB degradation went through four steps dominated by adsorption, reduction by mZVI, formation of Fe2+ species associated with iron (hydr)oxide, reduction by Fe2+ species associated with iron (hydr)oxide. The captured iron (hydr)oxide by mZVI/PVDF composite membrane after 1st use accelerated the formation of Fe2+ species associated with iron (hydr)oxide, which made the NB degradation in 2nd-5th use faster than in 1st use. To promote NB diffusion, the cross-flow model was further applied and the NB removal amount was 11.63 times that in static model in 1st use. Our findings showed the NB degradation by mZVI/PVDF composite membrane in details, which would accelerate optimized use of mZVI.
Department环境水质学国家重点实验室 ; 环境水质学国家重点实验室
KeywordWASTE-WATER GROUNDWATER REMEDIATION NITROAROMATIC COMPOUNDS DECHLORINATION NANOPARTICLES DEGRADATION TRICHLOROETHYLENE REMOVAL NZVI FE(II)
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/47720
Collection环境水质学国家重点实验室
Corresponding AuthorWang, Jun
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, 18 Shuangqing Rd, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Natl Engn Res Ctr Ind Wastewater Detoxicat & Reso, Res Ctr Ecoenvironm Sci, 18 Shuangqing Rd, Beijing 100085, Peoples R China
3.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yang, Chengfeng,Li, Kuiling,Xu, Lili,et al. Reduction of nitrobenzene by a zero-valent iron microspheres/polyvinylidene fluoride (mZVI/PVDF) membrane[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2022,282(0):120006.
APA Yang, Chengfeng,Li, Kuiling,Xu, Lili,Wang, Zhiyong,Yu, Ling,&Wang, Jun.(2022).Reduction of nitrobenzene by a zero-valent iron microspheres/polyvinylidene fluoride (mZVI/PVDF) membrane.SEPARATION AND PURIFICATION TECHNOLOGY,282(0),120006.
MLA Yang, Chengfeng,et al."Reduction of nitrobenzene by a zero-valent iron microspheres/polyvinylidene fluoride (mZVI/PVDF) membrane".SEPARATION AND PURIFICATION TECHNOLOGY 282.0(2022):120006.
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