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Environmental Surfaces and Interfaces Pub Date : 2025-01-06 DOI:10.1016/j.esi.2025.01.003

Chinmayee Das , Tajamul Shafi , Brajesh Kumar Dubey , Shamik Chowdhury

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引用次数: 0

摘要

整合各种高级氧化工艺（AOPs）可在处理效率和持续时间之间实现最佳平衡，确保废水得到充分处理，同时最大限度地降低成本并提高运行性能。在本研究中，使用二硫化钼/石墨烯气凝胶（MGA）复合材料的异相光催化与过氧化氢（H2O2）或过硫酸盐（PS）辅助的 AOPs 相结合，用于去除水生环境中常见的抗生素污染物四环素（TC）。具体而言，该研究系统地评估了 PS/H2O2 浓度、pH 值、初始污染物浓度、催化剂剂量和无机阴离子的存在等操作参数对 TC 去除的影响。研究发现，与 MGA/H2O2、纯 MGA、PS 和单独使用 H2O2 相比，MGA/PS 系统的降解活性明显更高。值得注意的是，在优化条件下，MGA/PS 系统可在可见光照射 60 分钟内实现 TC 的完全去除。此外，在相同的反应时间内，实际废水中 TC 的平均去除率约为 85.5%。这种提高归因于 PS 促进了自由基的生成，并充当了电子受体，从而减少了光诱导电荷载流子的重组，提高了电子-空穴分离效率。这项研究的成果为通过将 MGA 与基于 PS 的 AOPs 相结合来开发处理含抗生素废水的高效技术提供了宝贵的见解。

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Three-dimensional MoS2/graphene aerogel-driven visible-light photocatalysis assisted by persulfate or hydrogen peroxide for rapid degradation of tetracycline

The integration of various advanced oxidation processes (AOPs) can provide an optimal balance between treatment efficiency and duration, ensuring that wastewater is adequately treated while minimizing costs and maximizing operational performance. In this study, heterogeneous photocatalysis using a molybdenum disulfide/graphene aerogel (MGA) composite was integrated with hydrogen peroxide (H₂O₂) or persulfate (PS)-assisted AOPs to remove tetracycline (TC), a commonly detected antibiotic contaminant in aquatic environments. Specifically, the study assessed the effects of operating parameters, such as PS/H₂O₂ concentration, pH, initial pollutant concentration, catalyst dose, and the presence of inorganic anions on TC removal in a systematic manner. It was found that the MGA/PS system exhibited significantly greater degradation activity compared to MGA/H₂O₂, pure MGA, PS, and H₂O₂ alone. Notably, the MGA/PS system achieved complete removal of TC within 60 min of visible-light irradiation under optimized conditions. Furthermore, an average TC removal rate of approximately 85.5 % was observed in real wastewater during the same reaction period. This enhancement was attributed to PS facilitating the generation of free radicals and acting as an electron acceptor, which reduced the recombination of photoinduced charge carriers, thereby improving electron–hole separation efficiency. The outcomes of this study provide valuable insights for developing highly effective techniques for treating antibiotic-laden wastewater through the integration of MGA with PS-based AOPs.

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Environmental Surfaces and Interfaces

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