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6CCVD Research

Advanced electrochemical treatment of real biotreated petrochemical wastewater by boron doped diamond anode - performance, kinetics, and degradation mechanism

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2020-08-13
JournalWater Science & Technology
AuthorsHao Li, Xinmou Kuang, Congping Qiu, Xiaolan Shen, Botao Zhang
InstitutionsNingbo Polytechnic, Ningbo Institute of Industrial Technology
Citations12

Abstract

Section titled “Abstract”

Abstract Petrochemical wastewater is difficult to process because of various types of pollutants with high toxicity. With the improvement in the national discharge standard, traditional biochemical treatment methods may not meet the standards and further advanced treatment techniques would be required. In this study, electrochemical oxidation with boron doped diamond (BDD) anode as post-treatment was carried out for the treatment of real biotreated petrochemical wastewater. The effects of current density, pH value, agitation rate, and anode materials on chemical oxygen demand (COD) removal and current efficiency were studied. The results revealed the appropriate conditions to be a current density of 10 mA·cm−2, a pH value of 3, and an agitation rate of 400 rpm. Moreover, as compared with the graphite electrode, the BDD electrode had a higher oxidation efficiency and COD removal efficiency. Furthermore, GC-MS was used to analyze the final degradation products, in which ammonium chloride, formic acid, acetic acid, and malonic acid were detected. Finally, the energy consumption was estimated to be 6.24 kWh·m−3 with a final COD of 30.2 mg·L−1 at a current density of 10 mA·cm−2 without the addition of extra substances. This study provides an alternative for the upgrading of petrochemical wastewater treatment plants.

Tech Support

Section titled “Tech Support”

Original Source

Section titled “Original Source”

References

Section titled “References”
  1. 2016 - Green electrochemical process for metronidazole degradation at BDD anode in aqueous solutions via direct and indirect oxidation [Crossref]
  2. 2015 - Decontamination of wastewaters containing synthetic organic dyes by electrochemical methods. An updated review
  3. 2018 - Degradation of dye Procion Red MX-5B by electrolytic and electro-irradiated technologies using diamond electrodes [Crossref]
  4. 2018 - Removal of Procion Red MX-5B dye from wastewater by conductive-diamond electrochemical oxidation [Crossref]
  5. 2019 - Influence of hydrodynamic conditions on the degradation of 1-butyl-3-methylimidazolium chloride solutions on boron-doped diamond anodes [Crossref]
  6. 2014 - Decontamination of produced water containing petroleum hydrocarbons by electrochemical methods: a minireview [Crossref]
  7. 2014 - Scale-up of electrochemical oxidation system for treatment of produced water generated by Brazilian petrochemical industry [Crossref]
  8. 2017 - Electrochemical degradation of vanillic acid on a BDD anode [Crossref]
  9. 2014 - Electro-oxidation of pistachio processing industry wastewater using graphite anode [Crossref]
  10. 2015 - Removal of organic contaminants from secondary effluent by anodic oxidation with a boron-doped diamond anode as tertiary treatment [Crossref]

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