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Agglomeration of 10 nm amine-functionalized nano-magnetite does not hinder its efficiency as an environmental adsorbent

Title
Agglomeration of 10 nm amine-functionalized nano-magnetite does not hinder its efficiency as an environmental adsorbent
Author
박재우
Keywords
adsorption; aggregation; amine; Magnetite; nano
Issue Date
2019-04
Publisher
TAYLOR & FRANCIS INC
Citation
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING, v. 54, NO 7, Page. 648-656
Abstract
Amine-functionalized magnetite (nFe3O4-NH2) of two different sizes, 10 nm and 250 nm, were compared as environmental adsorbents. They were synthesized by co-precipitation (10 nm-nFe3O4-NH2) and solvothermal (250 nm-nFe3O4-NH2) methods, respectively. The prepared amine-functionalized magnetite was characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, vibrating sample magnetometer, Fourier transform infrared spectroscopy, size distribution analysis and surface area analysis to compare the properties of different sizes of nFe3O4-NH2. Both nFe3O4-NH2 contained cubic Fe3O4 crystalline structure. The 250 nm-nFe3O4-NH2 exhibited higher magnetic saturation value than the 10 nm-nFe3O4-NH2, but both could be separated from an aqueous solution using an external magnet. The surface area and pore volume of the smaller-sized 10 nm-nFe3O4-NH2 was larger than that of 250 nm-nFe3O4-NH2, but stronger aggregation was observed in the 10 nm-nFe3O4-NH2. Batch adsorption of lead indicated that the 10 nm-nFe3O4-NH2 was a better adsorbent than the 250 nm-nFe3O4-NH2. The maximum adsorption capacity of lead for the 10 nm-nFe3O4-NH2 and the 250 nm-nFe3O4-NH2 were 74.48 mg g–1 and 54.54 mg g–1, respectively. The stronger aggregation of nanoparticles with a smaller particle size did not affect the superior performance of the 10 nm-nFe3O4-NH2 as an environmental adsorbent. © 2019, © 2019 Taylor & Francis Group, LLC.
URI
https://www.tandfonline.com/doi/full/10.1080/10934529.2019.1579535https://repository.hanyang.ac.kr/handle/20.500.11754/110898
ISSN
1093-4529; 1532-4117
DOI
10.1080/10934529.2019.1579535
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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