第一作者:Yu-Han Fan
通讯作者:陈明 硕导
通讯单位:中国科学院大学重庆学院
DOI:10.1016/j.jhazmat.2023.132086
Fig. 1. SEM image (a) and TEM image (b) of Mo-Co-ECM; TEM image of different diffraction fringe (c); and TEM elemental mapping of C (d), Co (e) and Mo (f).Fig. 2. The XRD patterns of the prepared catalysts (a); XPS spectra of Mo-Co-ECM: C 1 s(b), Co 2p (c), Mo 3d (d) and O 1 s (e); ESR spectra (f).Fig. 3. Removal efficiency of IOH by different catalyst/PMS systems (a); The kinetic rates of IOH degradation by different catalyst/PMS systems (b); The TOC removal rate in Mo-Co-ECM/PMS system over time on IOH (c); Removal efficiency in different water samples by Mo-Co-ECM/PMS system (d). (Conditions: the concentration of IOH: 1 mg L−1, [Cat.] = 0.04 g/L, [PMS] = 0.2 mM and initial pH = 6.5).Fig. 4. Effects of catalyst dosage (a); initial concentrations of IOH (b); PMS dosage (c) and pH (d) on IOH degradation by Mo-Co-ECM/PMS system.Fig. 5. Reusability of prepared Mo-Co-ECM/PMS (a); The concentrations of leached metals (b); XPS spectra of used Mo-Co-ECM: Mo 3d (c); Co 2p (d) and C 1 s (e); EIS spectrum of the prepared catalysts (f).Fig. 6. Effect of radical scavengers on IOH removal in Mo-Co-ECM/PMS system (a); ESR spectra of SO4•-, •OH, O2•- and 1O2 (b); The optimized models of PMS adsorption on the catalyst without Ova (c) and with Ova (d); The different charge densities in the catalyst without Ova (e) and with Ova (f). (The yellow regions represent charge accumulation while cyan regions illustrate charge depletion).
本研究开发了富含 Ova 的 Mo-Co-ECM 催化剂,用于深度去除水中的 IOH。Ova 的存在增强了催化剂的电子传递能力以及反应体系中 Co3+/Co2+ 的循环。Mo-Co-ECM/PMS 系统具有广泛的应用范围和出色的稳定性。其深度降解和快速降解的特性有效抑制了降解产物的数量和毒性。除 IOH 外,Mo-Co-ECM/PMS 体系在降解 TC、RhB 和 BPA 方面也表现出良好的通用性。总之,本研究提出了一种通过深度降解/矿化来抑制降解产物形成的有效策略。
Yu-Han Fan, Yu-Wei Lu, Faisal Hayat, Yu-Han Mei, Ming Chen, Overcoming slow removal efficiency-induced highly toxic I-DBPs in water by oxygen vacancies enriched invasive plant biochar catalyst: Experimental and theoretical studies, Journal of Hazardous Materials, 2023, https://doi.org/10.1016/j.jhazmat.2023.132086
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