石油化工2026，Vol.55Issue(6)：861-869,9.DOI:10.3969/j.issn.1000-8144.2026.06.007
光电催化技术处理油田难降解有机废水
Photoelectrocatalytic technology for the treatment of oilfield refractory organic wastewater
摘要
Abstract
In view of the low removal efficiency of refractory organic compounds such as phenol and sodium benzenesulfonate in discharged wastewater from oilfields,CdS/TiO2 composite catalysts were prepared via the hydrothermal method.A high-efficiency photoelectrocatalytic(PEC)system was constructed,and the process parameters was optimized.Experimental results show that the degradation rate of chemical oxygen demand(COD)reaches 72.5%within 90 min of reaction under the conditions of 1.4 V bias potential,pH=7.0,and oxygen aeration rate of 40 mL/min for the CdS/TiO2 composite catalyst in the PEC system.The dissolution amount of Cd2+is below the detection limit,indicating that photocorrosion is effectively inhibited.In addition,no obvious decrease in the catalytic activity of CdS/TiO2 composite catalyst is found after 5 cycles of reuse.The main active species for the degradation of refractory organic compounds by CdS/TiO2 composite catalyst in the PEC system are h+and·OH,while the contribution of·O2-is relatively small.Under visible light irradiation,the type Ⅱ heterojunction accelerates the separation of photogenerated e--h+pairs.e-is captured by oxygen to generate·O2-,and h+are oxidized to form·OH.Finally,refractory organic compounds are oxidatively degraded through the combined action of h+and·OH.关键词
光电催化/油田外排水/难降解有机物/反应机理Key words
photoelectrocatalysis/discharged wastewater from oilfield/refractory organic compound/reaction mechanism分类
化学化工引用本文复制引用
孙福泰,杨永霞,张全,王亮亮,何蕙利..光电催化技术处理油田难降解有机废水[J].石油化工,2026,55(6):861-869,9.基金项目
丝绸之路经济带创新驱动发展试验区、乌昌石国家自主创新示范区科技发展计划项目(2023LQ03007). （2023LQ03007）
