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.
高锰酸钾/臭氧催化氧化去除气田采出水中重金属
- Title:
- Combined Process of Potassium Permanganate and Ozone Catalytic Oxidation for Removal of Heavy Metals in Gas Field Produced Water
- Keywords:
- gas field produced water; heavy metal; potassium permanganate; ozone catalytic oxidation; carbon?based catalyst
- 摘要:
- 塔里木盆地气田采出水存在多污染共存问题，其中重金属超标尤为突出。聚焦这一现状，系统探究了高锰酸钾氧化、臭氧催化氧化及二者联用对气田采出水中重金属的去除效果。结果显示，高锰酸钾和碳基催化剂联用对铜、汞、锌和铅的去除率超过97%，但对锰和镉的去除效果有限。在臭氧和碳基催化剂联用体系中，臭氧接触时间为30 min即可使铜、汞和锰去除率达97%~100%，锌和铅的去除率随臭氧接触时间的延长而降低，镉对臭氧氧化的敏感性较低（去除率为61%）。将高锰酸钾氧化与臭氧催化氧化联用，能够实现铜、汞、锰和锌的残留量同步达标，且镉的去除率较单一工艺提升14%。高锰酸钾/臭氧催化氧化联用技术通过氧化阶段的协同互补和解络合作用，有效解决了气田采出水中多金属的同步去除难题。
- 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.
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