ABSTRACT

The water produced (PW) by the petroleum industry is a potential contaminant to aquatic biota, due to its complex mixture that may contain polycyclic aromatic hydrocarbons (PAHs), organic chemical compounds, including benzene, toluene, ethylbenzene and xylene (BTEX), metals and other components that are known to be toxic. The aim of this investigation was to examine the acute toxicity produced by a PW sample in aquatic organisms Vibrio fischeri and Daphnia similis prior to and after 4 treatments using advanced oxidative processes such as photocatalysis, photoelectrocatalysis, ozonation and photoelectrocatalytic ozonation. Data demonstrated that exposure to PW was toxic to both organisms, as evidenced by reduced luminescence in bacterium Vibrio fischeri and induced immobility in Daphnia similis. After treatment of PW with 4 different techniques, the PW remained toxic for both tested organisms. However, photoelectrocatalysis was more efficient in decreasing toxicity attributed to PW sample. Therefore, data demonstrate the importance of treating PW for later disposal in the environment in order to mitigate ecotoxicological impacts. Further photoelectrocatalysis appeared to be a promising tool for treating PW samples prior to disposal and exposure of aquatic ecosystems.

摘要

石油工业生产的水 (PW) 是水生生物群的潜在污染物，因为其复杂的混合物可能含有多环芳烃 (PAH)、有机化合物，包括苯、甲苯、乙苯和二甲苯 (BTEX)、金属和其他已知有毒成分。本研究的目的是检查 PW 样品在使用先进的氧化过程（如光催化、光电催化、臭氧化和光电催化臭氧化）进行 4 次处理之前和之后在水生生物Vibrio fischeri和Daphnia similis 中产生的急性毒性。数据表明，暴露于 PW 对这两种生物都有毒性，如费氏弧菌发光减弱所证明和诱导水蚤不动。用 4 种不同的技术处理 PW 后，PW 对两种测试的生物体仍然有毒。然而，光电催化在降低 PW 样品的毒性方面更有效。因此，数据表明处理 PW 以便以后在环境中处置以减轻生态毒理学影响的重要性。进一步的光电催化似乎是在处理和暴露水生生态系统之前处理 PW 样品的有前途的工具。