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Chitosan modified zeolite molecular sieve particles as a filter for ammonium nitrogen removal from water

Gao, Yunan and Zhang, Jiayu 2020, Chitosan modified zeolite molecular sieve particles as a filter for ammonium nitrogen removal from water, International journal of molecular sciences, vol. 21, no. 7, pp. 1-15, doi: 10.3390/ijms21072383.

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Title Chitosan modified zeolite molecular sieve particles as a filter for ammonium nitrogen removal from water
Author(s) Gao, Yunan
Zhang, Jiayu
Journal name International journal of molecular sciences
Volume number 21
Issue number 7
Article ID 2383
Start page 1
End page 15
Total pages 15
Publisher MDPI
Place of publication Basel, Switzerland
Publication date 2020
ISSN 1661-6596
1422-0067
Keyword(s) ammonium nitrogen
chitosan
filtration
zeolite molecular sieves
Summary Drinking water containing a high amount of ammonium-nitrogen (NH4+-N) is not effectively removed by conventional treatment processes and can cause eutrophication. In this research, a composite adsorbent based on chitosan crosslink with zeolite molecular sieve (CTS-ZMS) was prepared for NH4+-N removal through dynamic adsorption filter experiments. Effect of bed depth (30, 50 and 70 cm), flow rate (32, 49 and 65 mL/min), initial pH value (4.5, 6.5 and 8.5) and influent NH4+-N concentration (3, 5 and 7 mg/L) was examined by using a filter column packed with CTS-ZMS particles. The Thomas model was applied to study the breakthrough curves and adsorption capacity. The optimal process parameters of the aforementioned factors were obtained at bed depth of 70 cm, flow rate of 32 mL/min, pH of 6.5 and initial NH4+-N concentration of 7 mg/L. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and Fourier Transform Infrared Spectroscopy (FTIR) were investigated to analyze the structure and morphology of the CTS-ZMS adsorbents before and after 3 months running. The EDS and FTIR results showed Na+ and the active functional groups of-OH,-NH2 and-COO− on CTS-ZMS adsorbent particles reacted with ammonium nitrogen. The results of this study supported the use of CTS-ZMS to improve drinking water filtration processes by increasing ammonium nitrogen reductions.
Language eng
DOI 10.3390/ijms21072383
Indigenous content off
Field of Research 0399 Other Chemical Sciences
0604 Genetics
0699 Other Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30137892

Document type: Journal Article
Collections: Institute for Frontier Materials
Open Access Collection
GTP Research
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.