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Evaporated mother liquor of gas field wastewater (EML-GFW) is a form of wastewater generated by the triple-effect evaporation treatment of gas field wastewater containing complex pollutants. In this study, four metal sulfides, CuS, ZnS, MoS₂, and WS₂, were used to strengthen the Fenton process in EML-GFW treatment. The optimum Fenton/ZnS process for the highest removal of TOC from EML-GFW was achieved at the initial pH of 3.0 and in a mixture of FeSO₄·7H₂O:ZnS:H₂O₂ in the ratio of 30 g/L:10 g/L:1.2 mol/L, with a TOC removal efficiency of 74.5%. The organic components analysis of EML-GFW over four distinct periods demonstrated that the presence of N,N-dimethylethanolamine (DMEA) persisted and accounted for the greatest proportion of pollutants, identifying it as the characteristic pollutant. The TOC removal mechanism by Fenton/ZnS was revealed via analysis of organic materials obtained from the Fenton/ZnS process, tert-butanol quenching experiment, and illumination experiment. ZnS-generated hole–electron pairs under illumination, which promoted the reduction of Fe³⁺ to Fe²⁺, followed by an acceleration of •OH generation, thus improving TOC removal efficiency. The Fenton/ZnS process improved the treatment of EML-GFW in the laboratory, providing strong data support and theoretical guidance for expanding this technology at the gas field project site.

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气田废水蒸发母液（EML-GFW）是含复杂污染物的气田废水经三效蒸发处理后产生的废水形式。在本研究中，四种金属硫化物CuS、ZnS、MoS ₂和WS ₂被用来强化EML-GFW处理中的芬顿过程。_{在初始 pH 值为 3.0 且 FeSO 4} ·7H ₂ O:ZnS:H ₂ O ₂比例为 30 g/L 的混合物中，实现了从 EML-GFW 中最高去除 TOC 的最佳 Fenton/ZnS 工艺：10 g/L：1.2 mol/L，TOC去除率为74.5%。对四个不同时期的 EML-GFW 的有机成分分析表明，N、N-二甲基乙醇胺（DMEA）持续存在且占污染物比例最大，将其确定为特征污染物。通过对Fenton/ZnS过程中获得的有机材料的分析、叔丁醇猝灭实验和光照实验，揭示了Fenton/ZnS去除TOC的机理。^{ZnS在光照下产生空穴电子对，促进Fe 3+}还原为Fe ²⁺，进而加速•OH的生成，从而提高TOC去除效率。Fenton/ZnS工艺改进了实验室对EML-GFW的处理，为该技术在气田项目现场推广提供了有力的数据支持和理论指导。