Furthermore, the PAO/BC aerogels-packed column can continuously and effectively treat the simulated wastewater with multiple heavy metals coexisting to below the threshold value in the drinking water recommended by World Health Organization (WHO), highlighting its feasibility in the complex environmental water.The continual increase in energy demand and inconsistent supply have attracted attention towards sustainable energy storage/conversion devices, such as electrochemical capacitors with high energy densities and power densities. Perovskite oxides have received significant attention as anion-intercalation electrode materials for electrochemical capacitors. In this study, hollow nanospheres of non-stoichiometric cubic perovskite fluorides, KNi1-xCoxF3-δ (x = 0.2; δ = 0.33) (KNCF-0.2) have been synthesized using a localized Ostwald ripening. The electrochemical performance of the non-stoichiometric perovskite has been studied in an aqueous 3 M KOH electrolyte to categorically investigate the fluorine-vacancy-mediated charge storage capabilities. High capacities up to 198.55 mA h g-1 or 714.8 C g-1 (equivalent to 1435 F g-1) have been obtained through oxygen anion-intercalation mechanism (peroxide pathway, O-). The results have been validated using ICP (inductively coupled plasma mass spectrometry) analysis and cyclic voltammetry. An asymmetric supercapacitor device has been fabricated by coupling KNCF-0.2 with activated carbon to deliver a high energy density of 40 W h kg-1 as well as excellent cycling stability of 98% for 10,000 cycles. The special attributes of hollow-spherical, non-stoichiometric perovskite (KNCF-0.2) have exhibited immense promise for their usability as anion-intercalation type electrodes in supercapacitors.Ozonation is increasingly applied in water and wastewater treatment for the abatement of micropollutants (MPs). However, the transformation products formed during ozonation (OTPs) and their fate in biological or sorptive post-treatments is largely unknown. In this project, a high-throughput approach, combining laboratory ozonation experiments and detection by liquid chromatography high-resolution mass spectrometry (LC-HR-MS/MS), was developed and applied to identify OTPs formed during ozonation of wastewater effluent for a large number of relevant MPs (total 87). For the laboratory ozonation experiments, a simplified experimental solution, consisting of surrogate organic matter (methanol and acetate), was created, which produced ozonation conditions similar to realistic conditions in terms of ozone and hydroxyl radical exposures. The 87 selected parent MPs were divided into 19 mixtures, which enabled the identification of OTPs with an optimized number of experiments. The following two approaches were considerre abated with decreasing efficiency with increasing run times of the filters. For example, in a GAC filter with 16,000 bed volumes, 53% of the OTPs were abated, while in a GAC filter with 35,000 bed volumes, 40% of the OTPs were abated. The highest abatement (87% of OTPs) was observed when 13 mg/L powdered activated carbon (PAC) was dosed onto a sand filter.At present, a large amount of landfill sludge(LS) has been accumulated all over the world. For environmental and engineering purposes, there is an urgent need for deep dewatering and volume reduction of LS. The deep dewatering of LS mainly uses the method of chemical preconditioning and mechanical dewatering, which is easy to cause environmental pollution and is not conducive to the subsequent resource treatment of LS. To find a more environmentally friendly and efficient method for deep dewatering of LS, an in-situ treatment method combining freeze-thaw and vacuum preloading was proposed. In this paper, based on the existing research, through compression consolidation test and MIP, SEM micro test, the consolidation properties and microstructure of LS after freeze-thaw and chemical preconditioning were studied, and the vacuum consolidation principle of different preconditioning was explored. The results show that Both FeCl3 and freeze-thaw preconditioning can increase the permeability coefficient and consolidation coefficient by one to two orders of magnitude; After freeze-thaw preconditioning, the void ratio of sludge decreases and the permeability coefficient increases; Under low consolidation pressure, the mechanical properties of the two kinds of pretreated sludge changed significantly; The original sludge is mainly composed of small pores. After FeCl3 conditioning, the large pores and mesopores increased significantly, while the small pores decreased. After freeze-thaw, the large pores and mesopores increase greatly, while the small pores decrease greatly; The original sludge is in the form of a dispersive flocculent structure with many impurities. After freeze-thaw, the intercluster pores increase, showing a honeycomb structure. After FeCl3 conditioning, the sludge structure is more compact and uniform. The change of microstructure and consolidation characteristics of sludge after conditioning reflects the difference of two different preconditioning mechanisms.Artificial sweeteners are contaminants of emerging concern that can enter the aquatic and terrestrial environments via wastewater effluent discharge and the environmental application of biosolids. The release of artificial sweeteners from the use of biosolids in Australia was assessed. The concentration of seven artificial sweeteners was quantified in biosolids samples collected from 71 wastewater treatment plants (WWTPs) across Australia during Census 2016. Sucralose, saccharin, acesulfame, aspartame and cyclamate were detected in biosolids samples at median concentrations ranging from 0.18 ng/g (dry weight) (range less then LOQ-34 ng/g) for cyclamate to 220 ng/g (range less then LOQ -3,670 ng/g) for sucralose, while neotame and neohesperidin dihydrochalcone were not detected. The relationship between the concentration of artificial sweeteners in biosolids and moisture content was assessed with the concentration of artificial sweeteners decreasing as dewatering time increased in a biosolids drying hall. see more The geometric means (± standard deviation) for per capita loads of individual artificial sweeteners ranged from 8.