Agglomeration of 10 nm amine-functionalized nano-magnetite does not hinder its efficiency as an environmental adsorbent
- Authors
- Kim, Hyun-Kyung; Park, Jae-Woo
- Issue Date
- Jun-2019
- Publisher
- TAYLOR & FRANCIS INC
- Keywords
- Magnetite; amine; nano; adsorption; aggregation
- Citation
- JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING, v.54, no.7, pp.648 - 656
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
- Volume
- 54
- Number
- 7
- Start Page
- 648
- End Page
- 656
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2187
- DOI
- 10.1080/10934529.2019.1579535
- ISSN
- 1093-4529
- Abstract
- Amine-functionalized magnetite (nFe(3)O(4)-NH2) of two different sizes, 10 nm and 250 nm, were compared as environmental adsorbents. They were synthesized by co-precipitation (10 nm-nFe(3)O(4)-NH2) and solvothermal (250 nm-nFe(3)O(4)-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 nFe(3)O(4)-NH2. Both nFe(3)O(4)-NH2 contained cubic Fe3O4 crystalline structure. The 250 nm-nFe(3)O(4)-NH2 exhibited higher magnetic saturation value than the 10 nm-nFe(3)O(4)-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-nFe(3)O(4)-NH2 was larger than that of 250 nm-nFe(3)O(4)-NH2, but stronger aggregation was observed in the 10 nm-nFe(3)O(4)-NH2. Batch adsorption of lead indicated that the 10 nm-nFe(3)O(4)-NH2 was a better adsorbent than the 250 nm-nFe(3)O(4)-NH2. The maximum adsorption capacity of lead for the 10 nm-nFe(3)O(4)-NH2 and the 250 nm-nFe(3)O(4)-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-nFe(3)O(4)-NH2 as an environmental adsorbent.
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