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

Dongyang Liu | Zendy; Chenyang Cui | Zendy; Yanhong Wu | Zendy; Huiying Chen | Zendy; Junfeng Geng | Zendy; Jianxin Xia | Zendy

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

Author(s) -

Dongyang Liu,

Chenyang Cui,

Yanhong Wu,

Huiying Chen,

Junfeng Geng,

Jianxin Xia

Publication year - 2018

Publication title -

peerj

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.927

H-Index - 70

ISSN - 2167-8359

DOI - 10.7717/peerj.5001

Subject(s) - adsorption , wastewater , zeolite , ammonia , pollutant , materials science , titanium , electrode , dielectrophoresis , nitrogen , chemical engineering , pulp and paper industry , chemistry , environmental engineering , environmental science , metallurgy , organic chemistry , catalysis , engineering

A new approach, based on dielectrophoresis (DEP), was developed in this work to enhance traditional adsorption for the removal of ammonia nitrogen (NH 3 -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 NH 3 -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).

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