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• The FeOCl/PMS/Vis system could efficiently remove and mineralize aquatic organic pollutants. • It was significantly enhancing the activation and utilization efficiency of PMS. • Operation across a broad range of environmental conditions. • The synergistic mechanism between photocatalysis and PMS activation in FeOCl/PMS/Vis system was revealed. Inspired by the photosensitivity and self-heal properties of iron oxychloride (FeOCl), we used photocatalysis coupling peroxymonosulfate (PMS) activation for effective aquatic decontamination in a cost-efficient and environmentally friendly method. Synthesized FeOCl was appointed to activate PMS to degrade bisphenol A (BPA, 2,2-bis(4-hydroxydiphenyl) propane) persistently under visible light. The best performance of FeOCl/PMS/Vis system was ∼100% BPA degradation efficiency which achieved in 20 min. The BPA removal efficiency had a positive correlation with the dosages of FeOCl and PMS, but negatively related to BPA concentration. The FeOCl/PMS/Vis system also presented impressive degradation performance at a wide pH range (pH = 3–11) and showed well excellent stability and reusability. The addition of either bicarbonate or chloride had impressive promotion effect on BPA removal. The reaction mechanism of FeOCl/PMS/Vis system was studied deeply. PMS was activated to generate active radicals (SO 4 − and HO) by Fe(II) of FeOCl for BPA degradation. Then the as-formed Fe(III) was reduced to Fe(II) via trapping photoexcited electrons in conduction band (CB) of FeOCl, which effectively inhibited the recombination of photo-generate charges and the pollutants oxidation would recur via facilitating the Fe(II)/Fe(III) redox recycle. Thus, the activation and utilization efficiency of PMS was effectively improved. This work indicated the FeOCl/PMS/Vis system was a promising application in wastewater treatment. [ABSTRACT FROM AUTHOR]

[Display omitted] • VUV/PMS system was firstly proposed as an effective technique for MPs degradation. • VUV/PMS system removes 51.5% of polyethylene after 48 h treatment under mild conditions. • The synergistic effect between VUV and PMS-based AOPs is the key to degrading MPs. • The direct photolysis of VUV enhances the adsorption of ROS for MPs degradation. Microplastics (MPs) pose a severe threat to the environment and human health, and effective treatment techniques are urgently desired to prevent the global spread of MPs pollution. However, efficient degradation of MPs remains difficult. Herein, vacuum ultraviolet (VUV) activated peroxymonosulfate (PMS) was firstly proposed as a promising technique for the degradation of polyethylene MPs. The weight loss of MPs reaches as high as 51.5% under mild conditions ([PMS] = 32 mmol/L, initial pH = 7, [MPs] = 1 g/L, [Time] = 48 h), which is the record performance achieved at room temperature and ambient pressure for MPs degradation. The excellent degradation performance is uncovered to originate from the synergistic effect of VUV and activated PMS. Direct photolysis of VUV can rapidly oxidize the surface of MPs to reduce its hydrophobicity and thus enhance the adsorption of reactive oxidation species (i.e., SO 4 ⋅− and HO⋅) rooted from the VUV activated PMS, which was further confirmed by DFT calculations. The degradation of MPs repeatedly undergoes the process of VUV photolysis oxidation of the surface, degradation via VUV/UV/PMS-derived reactive oxidation species, shedding, and re-exposure of the new surface via VUV photolysis oxidation. This study highlights the unique role of the VUV photolysis in MPs degradation, paving a new route for designing practical MPs pollution remediation techniques. [ABSTRACT FROM AUTHOR]

A straining-dominant filtration model based on directed bond percolation is proposed. The infinite cluster structure of this model is relevant to filtration properties. Thus, a direct electrifying algorithm is modified for infinite cluster backbone identification, and the geometrical characteristic of the infinite cluster is analyzed. In addition, the relationship between the normalized effluent concentration and infinite cluster is established. The model is validated by comparing the particle concentrations estimated from analyzing the property of filtration cluster of network model with the normalized effluent concentration obtained from filtration process simulation and the experimental data. The results show that normalized effluent concentrations estimated from cluster analysis are consistent with the experimental data and filtration simulated result. Finally, the sensitivity of pore size distribution (PSD) parameters to normalized effluent concentrations estimation is analyzed. Assuming that the PSD is lognormal, the normalized effluent concentrations increase as the location parameter μ increases and scale parameter σ decreases. [ABSTRACT FROM AUTHOR]

The Ag@10%CNTs electrode exhibits outstanding desalination performance that delivers a high initial specific capacity of 120.0 mAh g−1 at 100 mA g−1 and 41.3% is remained after 500 cycles, which can be ascribed to the enhanced ions diffusion, conversion efficiency of AgCl to Ag and structural stability. Furthermore, the NaTi 2 (PO 4) 3 ||Ag@CNTs full desalination battery delivers an initial capacity of 52.0 mAh g−1 at 100 mA g−1, and ∼27.5 mAh g−1 is maintained after 300 cycles. [Display omitted] • The Ag@10 %CNTs chloride storage material was synthesized successfully. • The Ag@10 %CNTs electrode exhibits outstanding desalination performance in desalination battery. • The Ag@10 %CNTs possesses enhanced conversion efficiency of AgCl to Ag and structural stability compared with Ag. • A full desalination battery assembled with Cl-storage electrode of Ag@10 %CNTs could deliver an initial capacity of 52.0 mAh g−1 at 100 mA g−1. Desalination battery (DB) is a new desalination technology with high desalination capacity, low energy consumption and mild operating conditions. However, its further development is greatly limited by the chloride storage electrode with high desalination capacity and good reversibility. Herein, Ag@10 %CNTs composite is developed as excellent chloride storage electrode, which delivers a high initial specific capacity of 120.0 mAh g−1 at 100 mA g−1, corresponding to a salt removal capacity of 250.4 mg-NaCl g−1-composite if calculated based on the average charge efficiency of first ten cycles (i.e., 95.6%), and 41.3% is remained after 500 cycles. The excellent desalination capacity can be ascribed to the uniform distribution of small Ag particles, well-developed porous structure and good electric conductivity enabled by CNTs, resulting in the enhanced ions diffusion, conversion efficiency of AgCl to Ag and structural stability. Furthermore, the Ag@10 %CNTs is paired with NaTi 2 (PO 4) 3 to construct the full desalination battery, delivering an initial capacity of 52.0 mAh g−1 at 100 mA g−1, and ∼27.5 mAh g−1 is maintained after 300 cycles. This work provides new guidance for developing efficient chloride storage electrode for excellent desalination performance. [ABSTRACT FROM AUTHOR]