ABDUREXITISawuti,SONGXiaojun,PENGHao,et al.Combined Process of Potassium Permanganate and Ozone Catalytic Oxidation for Removal of Heavy Metals in Gas Field Produced Water[J].China Water & Wastewater,2026,42(1):15-21.
Combined Process of Potassium Permanganate and Ozone Catalytic Oxidation for Removal of Heavy Metals in Gas Field Produced Water
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第1期
Page:
15-21
Column:
Date of publication:
2026-01-01
- Keywords:
- gas field produced water; heavy metal; potassium permanganate; ozone catalytic oxidation; carbon?based catalyst
- Abstract:
- The produced water from gas fields in the Tarim Basin has the problem of coexistence of multiple pollutants, among which heavy metal exceeding the standard is particularly prominent. Focusing on this problem, this study systematically explored the effects of potassium permanganate oxidation, ozone catalytic oxidation and their combination on the removal of heavy metals from gas field produced water. The results showed that the combination of potassium permanganate and carbon-based catalyst achieved a removal rate of over 97% for copper, mercury, zinc, and lead, but it had limited removal effect on manganese and cadmium. In the combined system of ozone and carbon-based catalyst, a 30-minute ozone contact time could make the removal rates of copper, mercury and manganese reach 97%-100%, while the removal rates of zinc and lead decreased with the extension of ozone contact time, and cadmium had low sensitivity to ozone oxidation (with a removal rate of 61%). The combination of potassium permanganate oxidation and ozone catalytic oxidation could realize the simultaneous up-to-standard of residual amounts of copper, mercury, manganese and zinc, and the removal rate of cadmium was 14% higher than that of the single process. The combined technology effectively solves the problem of simultaneous removal of multiple metals in gas field produced water through the synergistic complementarity of oxidation stages and chelation.
Last Update:
2026-01-01