Highly efficient removal of ammonia nitrogen from wastewater by dielectrophoresis-enhanced adsorption

Liu, Dongyang, Cui, Chenyang ORCID: 0000-0002-5544-1933, Wu, Yanhong, Chen, Huiying, Geng, Junfeng ORCID: 0000-0001-6246-0342 and Xia, Jianxin (2018) Highly efficient removal of ammonia nitrogen from wastewater by dielectrophoresis-enhanced adsorption. PeerJ, 6 (e5001). ISSN 2167-8359

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Abstract

A new approach, based on dielectrophoresis (DEP), was developed in this work to enhance traditional adsorption for the removal of ammonia nitrogen (NH3-N) from wastewater. The factors that affected the removal efficiency were systematically investigated, which allowed us to determine optimal operation parameters. With this new method we found that the removal efficiency was significantly improved from 66.7% by adsorption only to 95% by adsorption-DEP using titanium metal mesh as electrodes of the DEP and zeolite as the absorbent material. In addition, the dosage of the absorbent/zeolite and the processing time needed for the removal were greatly reduced after the introduction of DEP into the process. In addition, a very low discharge concentration (C, 1.5 mg/L) of NH3-N was achieved by the new method, which well met the discharge criterion of C < 8 mg/L (the emission standard of pollutants for rare earth industry in China).

Item Type: Article
Uncontrolled Keywords: General Biochemistry, Genetics and Molecular Biology, General Neuroscience, General Agricultural and Biological Sciences, Dielectrophoresis, Ammonia nitrogen, Adsorption, Wastewater, Zeolite
Subjects: Q Science > QH Natural history > QH301 Biology
S Agriculture > S Agriculture (General)
SWORD Depositor: JISC Publications Router
Depositing User: JISC Publications Router
Date Deposited: 06 Jul 2018 08:44
Last Modified: 17 Jan 2019 12:14
Identification Number: 10.7717/peerj.5001
Funders: ** Funder: National Natural Science Foundation of China; Grant num: 51609271; FundRef: 10.13039/501100001809, ** Funder: National Major Science and Technology Program for Water Pollution Control and Treatment; Grant num: 2017ZX07101-002, ** Funder: Fundamental Research Funds for the Central Universities; Grant num: 2016SHXY06
URI: http://ubir.bolton.ac.uk/id/eprint/1795

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