Preparation and dechlorination of a poly(vinylidene difluoride)-grafted acrylic acid film immobilized with Pd/Fe bimetallic nanoparticles for monochloroacetic acid

被引：29
作者：
Xia, Zhi [1 ]
Liu, Huiling [1 ]
Wang, Shan [1 ]
Meng, Zhaohong [2 ]
Ren, Nanqi [1 ]
机构：
[1] Harbin Inst Technol, Sch Municipal & Environm Engn, Harbin 150090, Peoples R China
[2] Harbin Normal Univ, Sch Geog Sci, Harbin 150025, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2012年 / 200卷
基金：
中国国家自然科学基金;
关键词：
Pd/Fe nanoparticles; PVDF support film; Hydrophilization; Acrylic acid; Dechlorination; Monochloroacetic acid; NANOSCALE IRON PARTICLES; REDUCTIVE DECHLORINATION; HALOACETIC ACIDS; TRICHLOROACETIC-ACID; ENVIRONMENTAL REMEDIATION; CATALYTIC DECHLORINATION; RAPID DECHLORINATION; PALLADIZED IRON; ZEROVALENT IRON; DRINKING-WATER;
D O I：
10.1016/j.cej.2012.06.056
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A poly(vinylidene fluoride) (PVDF) film was successfully modified to have hydrophilicity by three modification steps: (1) alkaline treatment to defluorinate the original PVDF film, (2) nucleophilic addition to hydrophilize the PVDF film, and (3) grafting acrylic acid (g-AA) to change the hydrophilization extent of the modified support film in order to facilitate the uniform distribution of metallic nanoparticles (NPs) immobilized on the modified film. Pd/Fe NPs were prepared and immobilized on the PVDF film grafted with AA (g-AA). The Pd-Fe/PVDF-g-AA NPs were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, contact angle analysis, and X-ray photoelectron spectroscopy. The Pd-Fe/PVDF-g-AA NPs exhibited high reactivity in the dechlorination of monochloroacetic acid (MCAA). The effects of acrylic acid concentration and Pd loading content on the MCAA dechlorination process were investigated. The kinetics of MCAA dechlorination by Pd-Fe/PVDF-g-AA NPs was discussed, and a conceptual model was proposed. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：214 / 223
页数：10
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