Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 368, Issue -, Pages 830-839Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2019.01.109
Keywords
Flow-through electro-Fenton; Municipal secondary effluent; Antibiotics removal; Graphene modification; Disinfection
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Funding
- National Key Research and Development Program of China [2016YFC0400706]
- Natural Science Foundation of China [21773129, 21811530274, 21273120]
- Key Project of Natural Science Foundation of Tianjin [16JCZDJC39300]
- 111 program, Ministry of Education, China [T2017002]
- Fundamental Research Funds for the Central Universities
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Conventionally the deep treatment and disinfection are fulfilled by different processes for municipal wastewater treatment, this work verified a breakthrough by one process of novel flow-through electro-Fenton (EF) with graphene-modified cathode, which is usually seemed to be ineffective. This process was firstly confirmed to be cost-effective for simultaneous sulfadiazines (SDZs) degradation and disinfection from municipal secondary effluent with a very low electrical energy consumption (EEC) of 0.21 kW h/m(3), attributed to the high H2O2 production of 4.41 mg/h/cm(2) on the novel graphite felt cathode modified by electrochemically exfoliated graphed (EEGr) with a low EEC of 3.08 kW h/(kg H2O2). Compared with the ineffective SDZs degradation by the conventional flow EF, this process was more cost-effective and overcame the harsh requirements on electrolyte concentration. It also showed good effectiveness in the degradation of different antibiotics, and the graphene-modified cathode still kept stable performance after eight consecutive runs. Account for the combined action of (OH)-O-center dot and active chlorine, the formation of hydroxylated and chlorine containing by-products was confirmed, and a possible degradation mechanism for SDZs was proposed. This flow-through EF process provided an alternative method for the disinfection and antibiotics degradation by one process for the treatment and reuse of municipal secondary effluent.
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