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Enhanced phthalate degradation in sewage plant by heterogeneous electro-fenton modified bimetallic single-atom catalyst
Process Safety and Environmental Protection ( IF 6.9 ) Pub Date : 2024-12-01 , DOI: 10.1016/j.psep.2024.11.120 Hongdi Mou, Hongyan Yang, Shenbao Qu, Aijiang Yang, Xia Hu
Process Safety and Environmental Protection ( IF 6.9 ) Pub Date : 2024-12-01 , DOI: 10.1016/j.psep.2024.11.120 Hongdi Mou, Hongyan Yang, Shenbao Qu, Aijiang Yang, Xia Hu
Phthalate organic pollutants are widespread in the environment and have carcinogenic, immunotoxic and reproductive toxicity to various life systems, causing ecological risks and threatening human health. Electro-Fenton catalysis represents the promising technology to produce super-active •OH for tackling severe water environment pollution issues, whereas it suffers from low atomic efficiency, poor pH adaptability, and catalyst non-reusability in a homogeneous or heterogeneous system. Therefore, we designed a bifunctional FeCo bimetallic single-atom catalyst (FeCo@NPC) for the electron-Fenton process, in which O2 is converted by synergistic interaction between Fe and Co atoms, phthalates were effectively degraded and mineralised with a degradation rate of 93.1 % under neutral conditions. The susceptibility sites and degradation pathways of DMP were reasonably inferred from DFT theoretical calculations and LC-MS results. The ecotoxicith assessment of the degradation products indicated that the FeCo@NPC electro-Fenton system has a considerable attenuation ability for DMP degradation. In addition, The overall removal rate of PAEs from actual wastewater by the electro Fenton system modified with this catalyst is 56 %. The catalyst proved to be pH-universality, long-term stability and environmentally friendly. This study provides new insights into effective and eco-friendly bifunctional electrocatalysts for the removal of phthalate contaminants.
中文翻译:
非均相电芬顿改性双金属单原子催化剂增强污水厂对邻苯二甲酸酯的降解
邻苯二甲酸酯有机污染物广泛存在于环境中,对各种生命系统具有致癌、免疫毒性和生殖毒性,造成生态风险,威胁人类健康。电芬顿催化代表了一种很有前途的技术,可以产生超活性 •OH 来解决严重的水环境污染问题,而它在均相或非均相系统中存在原子效率低、pH 适应性差和催化剂不可重复使用等问题。因此,我们设计了一种用于电子-芬顿过程的双功能 FeCo 双金属单原子催化剂 (FeCo@NPC),其中 O2 通过 Fe 和 Co 原子之间的协同作用转化,邻苯二甲酸盐在中性条件下被有效降解和矿化,降解率为 93.1 %。DMP 的磁化位点和降解途径是从 DFT 理论计算和 LC-MS 结果中合理推断出来的。降解产物的生态毒性评估表明,FeCo@NPC electro-Fenton 系统对 DMP 降解具有相当大的衰减能力。此外,使用该催化剂改性的电 Fenton 系统从实际废水中去除 PAE 的总比率为 56%。事实证明,该催化剂具有 pH 通用性、长期稳定性和环境友好性。本研究为有效且环保的双功能电催化剂去除邻苯二甲酸酯污染物提供了新的见解。
更新日期:2024-12-01
中文翻译:
非均相电芬顿改性双金属单原子催化剂增强污水厂对邻苯二甲酸酯的降解
邻苯二甲酸酯有机污染物广泛存在于环境中,对各种生命系统具有致癌、免疫毒性和生殖毒性,造成生态风险,威胁人类健康。电芬顿催化代表了一种很有前途的技术,可以产生超活性 •OH 来解决严重的水环境污染问题,而它在均相或非均相系统中存在原子效率低、pH 适应性差和催化剂不可重复使用等问题。因此,我们设计了一种用于电子-芬顿过程的双功能 FeCo 双金属单原子催化剂 (FeCo@NPC),其中 O2 通过 Fe 和 Co 原子之间的协同作用转化,邻苯二甲酸盐在中性条件下被有效降解和矿化,降解率为 93.1 %。DMP 的磁化位点和降解途径是从 DFT 理论计算和 LC-MS 结果中合理推断出来的。降解产物的生态毒性评估表明,FeCo@NPC electro-Fenton 系统对 DMP 降解具有相当大的衰减能力。此外,使用该催化剂改性的电 Fenton 系统从实际废水中去除 PAE 的总比率为 56%。事实证明,该催化剂具有 pH 通用性、长期稳定性和环境友好性。本研究为有效且环保的双功能电催化剂去除邻苯二甲酸酯污染物提供了新的见解。