Beijing Drainage Group (China)

Zero-Shot Water Monitoring from Fixed Drainage Surveillance Imagery Across Day/Night and Rain/No-Rain Conditions: A SAM 3 Benchmark at 25 Urban Sites

Urban drainage systems rely on fixed surveillance cameras that operate continuously under daytime, nighttime-infrared, rainy, and non-rainy conditions, yet most vision-based water-monitoring methods are validated only on daytime imagery and require costly pixel-level annotation....

High Sewage Sludge Loading Drives N2O-Dominated Warming Potential and Destabilizes Soil Microbial Networks during Ryegrass Cultivation

Abstract The application of sludge as a fertilizer contributes to greenhouse gas (GHG) emissions, but the associated microbial and geochemical mechanisms across sludge application rates remain unclear. A field experiment evaluated three sludge application rates (0, 3, and 30 kg/m...

The Efficiency and Mechanisms of Granular Activated Carbon for the Removal of Nitrosodimethylamine and Its Precursors in Reclaimed Water

Abstract During the potable reuse of reclaimed water, nitrosodimethylamine (NDMA), as a highly carcinogenic disinfection by-product (DBP), requires critical control. In this study, copper-doped nano zero-valent iron supported on granular activated carbon (nZVI-Cu@GAC) was synthes...

Occurrence and Distribution Profiles of Perfluoroalkyl and Polyfluoroalkyl Substances in Water and Sediment of the Lower Reaches of the Yellow River

ABSTRACT Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are known for their potential for long‐range transport and significant bioaccumulation, and long‐term exposure poses risks to both ecosystem integrity and public health. Globally, an increasing number of aquatic syste...