Journal
WATER RESEARCH
Volume 154, Issue -, Pages 336-348Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2019.02.013
Keywords
Peroxi-coagulation; Coking wastewater; Biodegradability; Graphene modified cathode; Flow through
Funding
- Natural Science Foundation of China [21773129, 21811530274, 21273120]
- Key Project of Natural Science Foundation of Tianjin [16JCZDJC39300]
- National Special S&T Project on Water Pollution Control and Treatment [2017ZX07107002]
- National Key Research and Development Program of China [2016YFC0400706]
- China Czech Science and Technology Exchange Project [42-8]
- 111 program
- Ministry of Education of China [T2017002]
- Fundamental Research Funds for the Central Universities
- Ministry of Education, Youth and Sports of the Czech Republic [8H17014]
Ask authors/readers for more resources
Cost-effective pretreatment of the highly concentrated and biorefractory coking wastewater to improve biodegradability is of significant importance, while green electrochemical technologies without external chemicals addition are charming but still challenging due to its high energy consumption. In this work, a novel multi-stages flow through peroxi-coagulation (PC) was for the first time developed with graphite felt cathode modified by graphene, showing an excellent performance in removal of 71.5% COD, 72.3% phenol and 59.4% NH3 -N and significant biodegradability enhancement with a low energy consumption as 1.2 kWh/m(3) . Compared with conventional flow PC, this process was more cost-effective due to more intensive center dot OH production and higher utilization of generated active species. Through UV spectrophotometry and GC-MS analysis, the improvement of biodegradability was attributed to the reduction of both low and high molecular weight compounds content in the coking wastewater. Comparing to the electro-Fenton, electrocoagulation and ozonation process, the proposed PC process was highly cost effective, providing a promising and new alternative for pretreatment of coking wastewater. (C) 2019 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available