Effective degradation of atrazine in wastewater by three-dimensional electrochemical system using fly ash-red mud particle electrode: Mechanism and pathway

Teng，Xiaolei1; Li，Junfeng1; Wang，Jiankang1; Liu，Jianchao2; Ge，Xinyu3; Gu，Tiantian4

2021-07-15

10.1016/j.seppur.2021.118661

SEPARATION AND PURIFICATION TECHNOLOGY   影响因子和分区

1383-5866

1873-3794

Recycling of fly ash (FA) and red mud (RM) is one of the most environmental challenges. In this study, the catalytic performance of fly ash-red mud particle electrodes (FRPEs), which were prepared with FA and RM under different ratios, were applied in three-dimensional electrochemical system (3DES) for wastewater treatment. Different ratios, cell voltage, initial pH and FRPEs dosage on the degradation of Atrazine (ATZ) were investigated. As a result, 90.1% of degradation rate toward ATZ was achieved as followed the optimal conditions: fly ash: red mud = 3:4, FRPEs dosage 100 g/L, cell voltage 5 V, initial pH 6.8 and treatment for 30 min. Additionally, FRPEs still maintained the high activity after 7 recycles, proving the stability and recyclability of the FRPEs in 3DES. The possible reaction mechanism of 3DES and the degradation pathway for ATZ were also proposed via controlling and free radical quenching experiments. The results indicated that ·OH is the main active free radical to degrade ATZ and the process mainly occurs on the surface of FRPEs. This research provides a new strategy for wastewater resources utilization of fly ash-red mud and broad prospect for the applications of 3DES.

Atrazine Fly ash Particle electrodes Red mud Three-dimensional electrochemical system

SCI ; EI

英语

其他

National Key R&D Program of China[2017YFC0404304] ; National Natural Science Foundation of China[U1803244] ; advanced talent special issue project of the Shihezi University["RCZK202002","RCZK202024"] ; youngest scientist project of the Shihezi University[CXPY202010]

Engineering

Engineering, Chemical

WOS:000641398700007

ELSEVIER

20211810296347

Degradation ; Electrochemical electrodes ; Free radicals ; Herbicides ; Wastewater treatment

Industrial Wastes Treatment and Disposal:452.4 ; Chemical Reactions:802.2 ; Organic Compounds:804.1

CHEMISTRY

2-s2.0-85104962090

Scopus

1.School of Water Conservancy and Architectural Engineering,Shihezi University,Shihezi,832000,China
2.Key Laboratory of Integrated Regulation and Resources Development,College of Environment,Hohai University,Nanjing,210098,China
3.School of Environmental Science and Engineering,Southern University of Science and Technology,1088 Xueyuan Blvd,Nanshan District,Shenzhen,518055,China
4.Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan,School of Chemistry and Chemical Engineering,Shihezi University,Xinjiang,832003,China

Teng，Xiaolei,Li，Junfeng,Wang，Jiankang,et al. Effective degradation of atrazine in wastewater by three-dimensional electrochemical system using fly ash-red mud particle electrode: Mechanism and pathway[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2021,267.

Teng，Xiaolei,Li，Junfeng,Wang，Jiankang,Liu，Jianchao,Ge，Xinyu,&Gu，Tiantian.(2021).Effective degradation of atrazine in wastewater by three-dimensional electrochemical system using fly ash-red mud particle electrode: Mechanism and pathway.SEPARATION AND PURIFICATION TECHNOLOGY,267.

Teng，Xiaolei,et al."Effective degradation of atrazine in wastewater by three-dimensional electrochemical system using fly ash-red mud particle electrode: Mechanism and pathway".SEPARATION AND PURIFICATION TECHNOLOGY 267(2021).