Source apportionment and ecological risk assessment of heavy metals in sediments of Dongping lake based on PCA-PMF model.

Accurately characterizing the spatial distribution of heavy metals in lake surface sediments, analyzing their sources, and identifying potential ecological risks are important scientific supports for lake ecosystem management. This study selected Dongping Lake, a typical inland shallow lake in the eastern region, as the research object. It systematically analyzed the distribution characteristics, source identification, and ecological risks of eight heavy metals (As, Zn, Cu, Ni, Cd, Hg, Pb, and Cr) in the sediments of Dongping Lake by employing a combination of statistical analysis, cluster analysis, principal component analysis (PCA), and positive matrix factorization (PMF) models, along with the enrichment factor method, geoaccumulation index method, and potential ecological risk assessment method.

Gold Nanoparticles-Functionalized Ultrathin Graphitic Carbon Nitride Nanosheets for Boosting Solar Hydrogen Production: The Role of Plasmon-Induced Interfacial Electric Fields.

The design of photocatalysts capable of generating localized surface plasmon resonance (LSPR) effects represents a promising strategy for enhancing photocatalytic activity. However, the mechanistic role of plasmonic nanoparticles-induced interfacial electric fields in driving photocatalytic processes remains poorly understood. To produce a Schottky junction, varying amounts of Au nanoparticles widely utilized to broaden the light absorption were loaded onto ultrathin carbon nitride sheets (Au/UCN).

Distribution Characteristics of High-Background Elements and Assessment of Ecological Element Activity in Typical Profiles of Ultramafic Rock Area.

This study investigates the weathering crust composite of serpentine, pyroxenite and granite in the Niangniangmiao area, the weathering crusts inside and outside the mining area were compared respectively, systematically revealing the distribution patterns, migration pathways, and ecological element activity characteristics of high-background elements (e.g., chromium (Cr) and nickel (Ni)) through precise sampling, the Tessier five-step sequential extraction method, and a migration coefficient model.

Boundary delineation and stability assessment of post-inrush water-immersed coal pillars based on integrated microseismic monitoring and field analysis.

The stability of flooded coal pillars has long been a challenging issue in coal pillar research, especially during the recovery of production after water inrush disasters. Due to the harsh on-site conditions, it is difficult to directly collect samples for analysis, which brings numerous challenges in both design and production. Based on the engineering background of the 1314 working face of Xiaoyun Coal Mine, this paper proposes a clustering optimization algorithm and successfully uses microseismic data collected on-site to identify the boundary of the flooded coal pillar, validating the results through simulation comparisons.

[Identification of Ecological Restoration of Territorial Space Based on Ecosystem Degradation Risk and Ecological Security Pattern: A Case Study of the Chang-Zhu-Tan Metropolitan Area].

Ecological restoration of territorial space is an important measure to implement the concept of ecological civilization construction, and accurately identifying ecological restoration areas is a difficult point in carrying out the ecological restoration of territorial space. Taking the Chang-Zhu-Tan metropolitan area as the research area； we used methods and models, such as the water balance equation, InVEST model, and circuit theory； combining ecological degradation risk assessment with ecological security pattern construction； accurately identifying the ecological conservation area and ecological restoration area of the ecological source area, ecological corridor, and stepping stone； and proposed strategies for ecological protection and restoration of national land space. The results indicated that： ① The ecological degradation risk in the study area substantially showed a "medium high and low weekly" spatial pattern.

Nano-sized aggregate TiC-TiO supported on the surface of AgNCN as a Z-scheme catalyst with enhanced visible light photocatalytic performance.

Exposing the photocatalyst's highly active facets and hybridizing the photocatalyst with suitable cocatalysts in the proper spot have been recognized as strong methods for high-performance photocatalysts. Herein, AgNCN/TiO-TiC composites were synthesized by applying simple calcination and physically weak interaction deposition processes to obtain an excellent photocatalyst for Rhodamine B (Rh B) degradation when exposed to visible light. The findings from the experiments reveal that the AgNCN/TiO-TiC400 composite exhibited an outstanding photocatalytic rate in 80 min, with the highest Rh B degradation rate ( = 0.

AgNCN anchored on TiCT MXene as a Schottky heterojunction: enhanced visible light photocatalytic efficiency of rhodamine B degradation.

The quick charge recombination of light-generated electrons and holes severely restricts the photocatalytic applications of single semiconductors. Here, a straightforward electrostatically driven self-assembly technique was used to construct an AgNCN/TiCT Schottky heterojunction, which was then used to degrade Rhodamine B (RhB) in the illumination of visible light. The findings from the experiments revealed that as a cocatalyst, TiCT significantly suppresses the recombination rate and broadens visible absorptivity to improve AgNCN photocatalytic efficiency.