Fabrication of Poly(γ-glutamic acid)-coated Fe3O4 Magnetic Nanoparticles and Their Application in Heavy Metal Removal

被引：30
作者：
Chang Jing [1 ]
Zhong Zhaoxiang [1 ]
Xu Hong [1 ]
Yao Zhong [1 ]
Chen Rizhi [2 ]
机构：
[1] Nanjing Univ Technol, Coll Food Sci & Light Ind, Nanjing 210009, Jiangsu, Peoples R China
[2] Nanjing Univ Technol, Jiangsu Key Lab Ind Water Conservat & Emiss Reduc, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China
来源：
CHINESE JOURNAL OF CHEMICAL ENGINEERING | 2013年 / 21卷 / 11期
基金：
中国国家自然科学基金;
关键词：
gamma-PGA; magnetic nanoparticles; Fe3O4; heavy metal removal; WASTE-WATER; AQUEOUS-SOLUTIONS; CR(VI) REMOVAL; ACID); FLOCCULANT; IONS;
D O I：
10.1016/S1004-9541(13)60629-1
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
In this study, poly(gamma-glutamic acid)-coated Fe3O4 magnetic nanoparticles (gamma-PGA/Fe3O4 MNPs) were successfully fabricated using the co-precipitation method. Fe3O4 MNPs were also prepared for comparison. The average size and specific surface area results reveal that gamma-PGA/Fe3O4 MNPs (52.4 nm, 88.41 m(2) . g(-1)) have smaller particle size and larger specific surface area than Fe3O4 MNPs (62.0 nm, 76.83 m(2) . g(-1)). The gamma-PGA/Fe3O4 MNPs can remove over 99% of Cr3+, Cu2+ and Pb2+, and over 77% of Ni2+ in deionized water, much higher than.-PGA and Fe3O4 MNPs, attributed to the larger specific surface area of gamma-PGA/Fe3O4 MNPs. With the solution pH higher than 6.0, gamma-PGA/Fe3O4 MNPs demonstrate better removal activity. The adsorption isotherm of gamma-PGA/Fe3O4 MNPs for Cr3+ fits the Freundlich model well, with the adsorption capacity of 24.60 m(2) . g(-1). gamma-PGA/Fe3O4 MNPs are strongly attracted by permanent magnet, so it is easy to separate them completely from water. With their high efficiency for heavy metal removal and easier separation, gamma-PGA/Fe3O4 MNPs have great potential applications in water treatment.
引用
收藏
页码：1244 / 1250
页数：7
相关论文
共 33 条
[1]   The removal of chromium(VI) from aqueous solutions by Fagus orientalis L. [J].
Acar, FN ;
Malkoc, E .
BIORESOURCE TECHNOLOGY, 2004, 94 (01) :13-15
[2]   Sorption of Zn(II), Pb(II), and Co(II) using natural sorbents: Equilibrium and kinetic studies [J].
Al-Degs, Yahya S. ;
El-Barghouthi, Musa I. ;
Issa, Ayman A. ;
Khraisheh, Majeda A. ;
Walker, Gavin M. .
WATER RESEARCH, 2006, 40 (14) :2645-2658
[3]   Cr(VI) removal from synthetic wastewater using coconut shell charcoal and commercial activated carbon modified with oxidizing agents and/or chitosan [J].
Babel, S ;
Kurniawan, TA .
CHEMOSPHERE, 2004, 54 (07) :951-967
[4]   Poly (glutamic acid) - An emerging biopolymer of commercial interest [J].
Bajaj, Ishwar ;
Singhal, Rekha .
BIORESOURCE TECHNOLOGY, 2011, 102 (10) :5551-5561
[5]   Flocculation Properties of Poly(γ-Glutamic Acid) Produced from Bacillus subtilis Isolate [J].
Bajaj, Ishwar B. ;
Singhal, Rekha S. .
FOOD AND BIOPROCESS TECHNOLOGY, 2011, 4 (05) :745-752
[6]   Nanoparticles formed by complexation of poly-gamma-glutamic acid with lead ions [J].
Bodnar, MagdoIna ;
Kjoniksen, Anna-Lena ;
Molnar, Reka M. ;
Hartmann, John F. ;
Daroczi, Lajos ;
Nystrom, Bo ;
Borbely, Janos .
JOURNAL OF HAZARDOUS MATERIALS, 2008, 153 (03) :1185-1192
[7]   Characterization of aqueous dispersions of Fe3O4 nanoparticles and their biomedical applications [J].
Cheng, FY ;
Su, CH ;
Yang, YS ;
Yeh, CS ;
Tsai, CY ;
Wu, CL ;
Wu, MT ;
Shieh, DB .
BIOMATERIALS, 2005, 26 (07) :729-738
[8]  
Dantas TND, 2001, LANGMUIR, V17, P4256
[9]   ACRYLAMIDE - ITS METABOLISM, DEVELOPMENTAL AND REPRODUCTIVE EFFECTS, GENOTOXICITY, AND CARCINOGENICITY [J].
DEARFIELD, KL ;
ABERNATHY, CO ;
OTTLEY, MS ;
BRANTNER, JH ;
HAYES, PF .
MUTATION RESEARCH, 1988, 195 (01) :45-77
[10]   Synthesis and characterization of poly(hydroxyethyl methacrylate-N-methacryloyl-(L)-glutamic acid) copolymer beads for removal of lead ions [J].
Denizli, A ;
Garipcan, B ;
Karabakan, A ;
Senöz, H .
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, 2005, 25 (04) :448-454
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