COD removal from gasfield produced water using photoelectrocatalysis process on coil type microreactor

A special type of reactor with a high active surface-to-volume ratio was used for investigation of organic pollutants degradation from a gasfield produced water by photoelectrocatalysis process. The GC–MS analysis showed that there were more than 50 organic substances in this wastewater; therefore, COD was considered as the target parameter for studying. A simple evaporation process used for decreasing high TDS of the wastewater reduced its electrical conductivity from 6300 μS/cm to 1100 μS/cm and also initial COD decreased simultaneously from 9500 mg/L to 750 mg/L. Distilled wastewater from the evaporation process was treated again by the photoelectrocatalysis process using a coil type microreactor, and its COD dropped off to 143 mg/L. Instead of usual semiconductors in photoelectrocatalysis like TiO2, boron carbon nitride (BCN) nanosheets are used as a photocatalyst in this study. Investigating the impact of different parameters on COD removal efficiency showed that the greatest COD removal efficiency (81%) was obtained at residence time 15 min, pH = 3, applied cell voltage 20 V, electrical conductivity = 2500 μS/cm and H2O2 concentration of 8 mM. © 2021 The Korean Society of Industrial and Engineering Chemistry

Ebadi S.1 , Ghasemipanah K.1 , Alaie E.1 , Rashidi A.2 , Khataee A. 3, 4
Korean Society of Industrial Engineering Chemistry
  • 1 Environment and Biotechnology Research Division, Research Institute of Petroleum Industry (RIPI), Tehran, 14665-137, Iran
  • 2 Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), Tehran, 14665-137, Iran
  • 3 Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, 51666-16471, Iran
  • 4 Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow, 117198, Russian Federation
Ключевые слова
BCN nanosheets; COD degradation; Coil type microreactor; Photoelectrocatalysis process; Produced water
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