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[Display omitted] • The catalyst with optimized Cu/Mg molar ratio rapidly activated PMS to remove TAP. • MgO wrapped CuO nanoparticles in the catalyst and limited copper ion leaching. • MgO promoted the formation of Cu-OH complex and redox cycle of Cu+-Cu2+-Cu+. • Activation mechanism of PMS and degradation pathways of TAP were proposed. Copper-base catalysts with high load content of CuO were commonly utilized to activate peroxymonosulfate (PMS) for removal of contaminants but limited catalytic efficiency and increased risk of copper ion leaching restricted their use. In this paper, Cu-Mg mixed metal oxides with highly dispersed minute quantities of CuO were successfully prepared by one-pot synthesis for efficiently activating PMS to remove thiamphenicol (TAP), which was economical and environmentally friendly. The catalytic activities of catalysts with different molar ratios of Cu and Mg for PMS and their characteristics were evaluated, illustrating the optimal molar ratio of Cu and Mg (1:15, named CuMg-MMO) in the catalyst. For the CuMg-MMO catalyst, MgO widely dispersed and wrapped CuO nanoparticles, minimized the copper ion leaching and promoted the generation of Cu-OH complex and non-radical species. In the CuMg-MMO/PMS system, the influence factors for TAP degradation were analyzed, including different systems, catalyst dosages, PMS concentrations, temperatures, initial pH values, TAP concentrations, anions (N O 3 - , H C O 3 - , C l - , H P O 4 2 - and H 2 P O 4 -) and natural organic matter (NOM) concentrations. Under the optimal conditions (i.e., [catalyst]: 75 mg/L, [PMS]: 0.3 mM, temperature: 30 °C and initial pH: 6.5), TAP removal efficiency obtained by this system was 99.9%. S O 4 · - , · O 2 - and 1O 2 played more important roles than H O · in TAP degradation. Four successive repeated experiments indicated that CuMg-MMO possessed good reusability and stability. PMS decomposition, mineralization of TAP, the activation mechanism of PMS and possible degradation pathways of TAP were analyzed. [ABSTRACT FROM AUTHOR]

[Display omitted] • It was firstly demonstrated that the synergistic activation of PMS by MoS 2 @PANI and Cu(II). • High removal rate of sulfathiazole (≥85 %) achieved within a wide range of pH (3–10) in Cu(II)/MoS 2 @PANI/PMS. • H O ∙ , Cu(Ⅲ) and 1 O 2 were generated in Cu(II)/MoS 2 @PANI/PMS, while SO 4 ∙ - was negligible. • Compared with Fe(II), Cu(II) improved reusability and applicability of MoS 2 @PANI in activation of PMS. • The absorption of Cu(II) on MoS 2 @PANI improved the stability of MoS 2 @PANI. This paper synergistically combined MoS 2 @PANI (coating MoS 2 on polyaniline (PANI)) with Cu(II) to obtain effective activation of PMS in a wide range of pH (3–10). The removal rate of sulfathiazole (ST) in Cu(II)/MoS 2 @PANI/PMS (98 %) in 60 min was higher than in Cu(II)/PMS (50 %) and MoS 2 @PANI/PMS (70 %). Besides, the PMS consumption rate was 100 % within 30 min in Cu(II)/MoS 2 @PANI/PMS. Different concentrations of Cl - and HCO 3 - promoted the degradation of ST in varying degrees. And NO 3 - slightly inhibited the degradation of ST (removal rate more than 84 %). Notably, Cu(II)/MoS 2 @PANI/PMS could remove more than 80 % ST in different water bodies. The special structure of MoS 2 @PANI increased many activity sites of Mo(IV) to promote the cycle of Cu(II)/Cu(I) for activating PMS which generated H O ∙ , Cu(III) and 1 O 2. Twenty-seven degradation intermediates were identified and four possible degradation paths of ST were proposed. Moreover, Cu(II)/MoS 2 @PANI/PMS possessed a good non-selectivity for various organic pollutants. After three consecutive cycles, the removal rate still retained more than 90 % in Cu(II)/MoS 2 @PANI/PMS system. Compared with Fe(II), MoS 2 @PANI was more stable in Cu(II)/MoS 2 @PANI/PMS. The synergy of Cu and Mo broke the limitation of PMS activation under environmental aquatic conditions. Given that Cu(II) widely existed in wastewater, the new research strategy increased the application scope for homogeneous PMS activation with inherently Cu(II) in wastewater in environmental remediation. [ABSTRACT FROM AUTHOR]

[Display omitted] • This study introduces a novel method for enhancing oil-water separation in high-temperature condensate. • The process resulted in a unique membrane with adjustable pores, hydrophilic-oleophobic properties, and remarkable stability. • After eight cycles, the adapted membrane achieves over 99.00 %, which highlights a commendable reusability. • Under the extreme conditions, the coated membrane performs exceptionally well, indicating versatile potential. • SiC ceramic membranes are poised to broaden their use in water treatment, gas separation, and biotechnology. The primary objective of this research is to improve the efficiency of separating oil and water within the challenging environment of high-temperature condensate. This will be achieved through the innovative approach of surface modifying silicon carbide (SiC) membranes with polyethyleneimine (PEI). To begin, different concentrations of PEI aqueous solutions are formulated by mixing PEI with ultrapure water. Following this, a SiC ceramic membrane undergoes modification through immersion in the solution. This process yields a tailored separation membrane with hydrophilic and oleophobic properties, adjustable pore size, robust physicochemical stability, and surface anti-fouling attributes. This achievement stems from precise regulation of the reaction duration during the meticulous process. Notably, in the context of separating diesel-in-water emulsions across varying concentrations, the adapted membrane demonstrates an extraordinary separation efficiency surpassing 99.00 %. Additionally, it demonstrates impressive resilience against oil fouling, further highlighting its effectiveness. The membrane showcases commendable reusability, sustaining an oil interception rate that exceeds 99.00 % even after undergoing eight consecutive cycles. Furthermore, the coated membrane exhibits exceptional performance even in challenging conditions, including high salinity, extreme pH levels, and temperatures reaching up to 100 °C. At the same time, the membrane demonstrates outstanding mechanical properties. The findings from this study illustrate the promising real-world applications of this groundbreaking oil–water separation membrane. [ABSTRACT FROM AUTHOR]