Performance of nitrobenzene and its intermediate aniline removal by constructed wetlands coupled with the micro-electric field.

Affiliation

Wang H(1), Zhang L(2), Tian Y(3), Jia Y(4), Bo G(5), Luo L(6), Liu L(7), Shi G(8), Li F(9).
Author information:
(1)College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China. Electronic address: [Email]
(2)School of Geology and Environment, Xi'an University of Science and Technology, Xi'an, China. Electronic address: [Email]
(3)College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China. Electronic address: [Email]
(4)School of Geology and Environment, Xi'an University of Science and Technology, Xi'an, China. Electronic address: [Email]
(5)College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China. Electronic address: [Email]
(6)College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China. Electronic address: [Email]
(7)College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China. Electronic address: [Email]
(8)College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China. Electronic address: [Email]
(9)College of Mining Engineering, North China University of Science and Technology, Tangshan, China. Electronic address: [Email]

Abstract

The degradation of nitrobenzene and its intermediate aniline from wastewater by constructed wetlands coupled with the micro-electric field (CW-MEF) technology was studied. The results showed that the CW-MEF system had good degradation. With the increase of influent concentration of nitrobenzene, the removal rate of the anode was excellent which remained above 86%, but the degradation of CW-MEF for COD decreased. In different stages, the power generation capacity was different. In the second stage, the power generation voltage reached 430 V and the average power density was 85.07 MW m-3, while the maximum reached 87.47 MW m-3. Through high-throughput sequencing analysis, the A1 sludge layer contained 36% of thick-walled bacteria and 20% of bacteroides, the A2 contained about 20% of campylobacter green, and the A3 contained 10% of green campylobacter, pachyphyte and bacteroides.