Fabrication of Poly(γ-glutamic acid)-coated Fe<sub>3</sub>O<sub>4</sub> Magnetic Nanoparticles and Their Application in Heavy Metal Removal

常菁; 仲兆祥; 徐虹; 姚忠; 陈日志

doi:10.1016/S1004-9541(13)60629-1

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

分离科学与工程 | Updated：2026-01-06

- Fabrication of Poly(γ-glutamic acid)-coated Fe₃O₄ Magnetic Nanoparticles and Their Application in Heavy Metal Removal
- Chinese Journal of Chemical Engineering Vol. 21, Issue 11, Pages: 1244-12501004-954160629-1(2013)
- Affiliations：
  
  2 State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu Key Laboratory of Industrial Water-Conservation & Emission Reduction, Nanjing University of Technology,Nanjing,China,210009
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(13)60629-1
  CLC：
- Published：2013
- Accepted：
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DOI：

O DOI： 10.1016/S1004-9541(13)60629-1.

摘要

Abstract

In this study

poly(γ-glutamic acid)-coated Fe

magnetic nanoparticles (γ-PGA/Fe

MNPs) were successfully fabricated using the co-precipitation method. Fe

MNPs were also prepared for comparison. The average size and specific surface area results reveal that γ-PGA/Fe

MNPs (52.4 nm

88.41 m

·g

-1

) have smaller particle size and larger specific surface area than Fe

MNPs (62.0 nm

76.83 m

·g

-1

). The γ-PGA/Fe

MNPs can remove over 99% of Cr

and Pb

and over 77% of Ni

in deionized water

much higher than γ-PGA and Fe

MNPs

attributed to the larger specific surface area of γ-PGA/Fe

MNPs. With the solution pH higher than 6.0

γ-PGA/Fe

MNPs demonstrate better removal activity. The adsorption isotherm of γ-PGA/Fe

MNPs for Cr

fits the Freundlich model well

with the adsorption capacity of 24.60 mg·g

-1

. γ-PGA/Fe

MNPs are strong

ly 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

γ-PGA/Fe

MNPs have great potential applications in water treatment.

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

DOI：10.1016/S1004-9541(13)60629-1

摘要

Abstract

关键词

Keywords

references

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