Atomically engineered Fe/Mn catalysts enable ultrafast self-sustaining water purification via oxidant-free Fenton-like electron-transfer reaction.

The rational design of Au0/g-C3N4 photocatalysts with enhanced charge separation for visible-light-driven water purification

Efficient bromide recovery from seawater and desalination brine is increasingly critical for renewable energy storage and industrial applications, yet conventional electrochemical systems struggle with selectivity in chloride-dominated matrices. We report bromide-selective composite electrodes (BrSCE) that integrate anion-exchange resin particles within activated carbon matrices, creating a dual-pathway architecture where ion selectivity enhances electrochemical separation. The composite design positions resin microspheres throughout the porous carbon network, enabling simultaneous capacitive deionization and selective ion exchange under applied voltage. Systematic parameter optimization identified critical performance factors: resin loading (20–50%), feed solution Cl − : Br − ratios (1: 1 to 5:1), and applied voltage (0.8–1.6 V ), yielding quadratic predictive models (R 2 > 0.97, p < 0.0001) for both selectivity and desalination efficiency. The optimized BrSCE (43.6 wt% resin content, 1.2 V) achieved Br − /Cl − selectivity of 2.83 in challenging 5:1 Cl − : Br − molar ratio solutions, directly addressing the primary limitation in halide separation from real brines. Notably, the system demonstrated exceptionally rapid bromide recovery kinetics with 45% desorption within 2 min and 97% total recovery, representing a substantial acceleration compared to conventional ion-exchange processes. The BrSCE simultaneously delivered 60% TDS reduction, enabling dual-function operation for both selective resource recovery and water purification. These performance characteristics position the composite electrode approach as a viable strategy for valorizing low-concentration bromide sources previously considered uneconomical, advancing circular economy principles in industrial water treatment, and critical resource recovery. • Bromide selective electrode (BrSCE) was developed for Br − removal & recovery • BrSCE achieved good selectivity and efficient dissolved salt reduction • Optimized BrSCE achieved 2.83 Br − selectivity over Cl − & 60% TDS reduction • Desorption yielded 97% total bromide recovery efficiency • Offers practical solutions for bromine production & targeted desalination

Power-to-X (PtX) processes are gaining attention as pathways to store renewable electricity in the form of hydrogen, synthetic fuels, and chemicals. While PtX technologies support decarbonisation and energy system flexibility, sustainable water management is increasingly recognised as a key constraint for large-scale deployment. This review synthesises recent literature on water demand and quality requirements across PtX pathways and identifies opportunities for circular water strategies, including integration with wastewater treatment, advanced water recovery, and internal reuse. Water availability, feedwater quality, purification requirements, energy penalties, and governance frameworks are identified as critical factors shaping water circularity in PtX systems. Although conventional water purification typically contributes less than 1% to the levelized cost of hydrogen (LCOH), water availability and sourcing constraints can emerge as system-level limiting factors, particularly in water-stressed regions. Key research gaps include electrolysis performance under circulating and reclaimed water operation, and system-level modelling that accounts for water scarcity and intermittent operation

Metal accumulation and rhizosphere microbial associations in Nymphaea lotus and Limnocharis flava from a natural wetland

Fisheries carbon sinks–ecosystem services–human well-being nexus: A systematic map

Enhancement of ecological barrier function based on the nonlinear relationship between environmental factors and ecosystem services, Qinghai-Tibetan Plateau

From persistence to reactivity: halogen-regulated photosensitization of xanthene chromophores for sustainable water purification.

Activating the photocatalytic potential of insulator hydroxyapatite via oxygen vacancies and dual Schottky junctions for NIR-I/II synergistic water disinfection and purification

Electrochemical hydrogenation of halogenated disinfection byproducts in drinking water purification

Synthesis and evaluation of a Ni-H2bpda/Fe3O4 nanocomposite with high tetracycline adsorption capacity and broad-spectrum antibacterial activity

Bimetallic catalytic ceramic membrane for sustained water purification: Role of Cu in stabilizing reduced Co centers

Biomimetic ultra-permeable nanofiltration membrane with gradient nanochannels for water purification

Tuning 4f-2p-3d gradient orbital coupling in perovskite heterointerfaces to optimize Co2+/Co3+ redox cycling for peroxymonosulfate activation.

Oxygen vacancy-mediated d-band center regulation in NiCu0.4Fe1.6O4 via Cu-doping achieves efficient peroxymonosulfate activation for durable water purification

Techno-Economic Assessment of Wheat-derived hybrid evaporator with energy-confinement network for high-efficiency solar water purification andCarbon-Neutral concurrent electricity generation

Wastewater treatment remains a critical challenge for water security, ecological integrity, and public health. Constructed wetlands (CWs) are widely advanced as nature-based solutions (NbS) because they use ecosystem processes for water purification and can deliver ecological co-benefits. This scoping review mapped 36 peer-reviewed studies (2010–2025; 63 extracted records) evaluating CWs used alone or within CW-based treatment trains incorporating advanced oxidation processes (AOPs) as pre-treatment or post-polishing. Outcomes covered conventional pollutants, selected micropollutants, and microbial indicators; PFAS and antibiotic-resistance indicators were assessed where reported. Vertical subsurface-flow and hybrid CWs generally reported high removal of COD, TN, and TP and meaningful reductions of indicator bacteria, supporting secondary treatment objectives. Micropollutant evidence was heterogeneous and compound-specific; carbamazepine showed limited attenuation. PFAS reporting in the mapped corpus was sparse and, where present, indicated variable, compound-dependent attenuation rather than demonstrable absence. No included studies provided extractable antibiotic-resistance gene outcomes. AOP units (e.g., ozonation, UV/H₂O₂, photo-Fenton) were associated with positive within-study deltas in some cases but were matrix-dependent and carry energy/chemical demands and potential transformation products requiring monitoring. IUCN Global Standard assessment was applied to the CW intervention only, revealing stronger reporting for problem framing and design intent and persistent gaps in equity, inclusiveness, and policy coherence.

Function diagrams focus on physiological concepts rather than associated structures and can serve as elaboration tools and mnemonic aids. A function diagram prototype of the gastrointestinal system was recently described (Wilson TE, Barrett KE. Adv Physiol Educ 45: 264-268, 2021). In this article, a functional diagram of the glomerulus, nephron, urinary system, and bladder is proposed. Colloquially named "Nessie the Nephron" to loosely capture the looping structure and elusive understanding of renal blood flow, glomerular filtration, and epithelial transport for the student, not to mention the nearly mythical countercurrent multiplier. "Navigating the Lochs" references Nessie's possible habitat and more importantly the movement and storage of the modified ultrafiltrate from the nephron. The primary analogies that form the structure of this function diagram are Rain Barrel, Soaker Hose, and Hose Nozzle (afferent and efferent blood flow and filtration pressure); Water Purification System (glomerular filtration barrier forming multiple step filtration process involving the capillary, basement membrane, and podocytes); Mixed Recycling Machine (proximal tubule individual, co-, and bulk transport); Desiccator and Briner (thin descending limb removal of water and thin/thick ascending limb removal of salt); Conveyor Belt Picker (distal nephron selective ion transport); and Concentrator (collecting duct water and urea transport). The primary analogies that elaborate Navigating the Lochs are Aqueduct and Cistern System (fluid movement and collection); and Pressure Gauge, Syringe Bulb, and Two-Valve Plumbing (bladder storage and micturition). Complementing these analogies is the rich potential for inclusion of clinical and comparative applications and examples to link previous knowledge and strengthen memories for future retrieval.NEW & NOTEWORTHY Function diagrams put the focus on physiology and physiological concepts rather than the associated anatomy and can serve as elaboration tools and mnemonic aids. The function diagram of the nephron can provide analogies for glomerular filtration, bulk and selective epithelial transport, and overall ability to create concentrated or dilute urine. The function diagram of the urinary system and bladder can provide analogies for moving and storing urine and finally micturition.

Characterization of a bacteriophage infecting drug-resistant Pseudomonas aeruginosa and its application in wastewater treatment.

Water purification ecosystem services in the Integrated Economic-Environmental Model (IEEM): An application to investing in water quality in Uruguay