Hunan Communications Research Institute

Conventional adsorption technologies face significant challenges in dye wastewater treatment, particularly in achieving effective mineralization and reducing toxicity. To address these limitations, we have developed novel nanomaterials that integrate both adsorption and photocatalytic functions, thereby enhancing treatment efficiency. The composite materials were synthesized by co-precipitating CeO2 onto the surface of NiAl-Layered Double Hydroxides (NiAl-LDHs). These composites were then employed for the degradation of Naphthol Blue Black (NBB) effluent. The results revealed that the optimized CeO2@NiAl-LDHs achieved a 96.2% removal of NBB, which represents a 67.9% improvement compared to pure NiAl-LDHs. The primary mechanisms of NBB adsorption onto CeO2@NiAl-LDHs were identified as ligand exchange and electrostatic attraction. Additionally, CeO2@NiAl-LDHs form a direct Z-scheme heterojunction, which promotes efficient electron–hole separation and enhances the generation of ·OH and O2·⁻, key species involved in NBB degradation. After 8 h of treatment, the CeO2@NiAl-LDHs system reduced biological toxicity of wastewater, while improving its biodegradability (BOD/COD increased to 0.41). Even after 5 cycles, the composite material’s removal rate for NBB only slightly decreased from 96.2% to 88.6%. This study provides a practical approach for developing CeO2@NiAl-LDHs-based photocatalysts with excellent adsorption and photocatalytic properties, presenting a novel solution for wastewater treatment.

In order to improve the accuracy of Ground Penetrating Radar image analysis and interpretation, to realize the effective detection of tunnel structure, as well as to improve the performance of its application in engineering inspection, this study adopts the intrinsic time-scale decomposition method to process the Ground Penetrating Radar data. By analyzing the processed data, we find that this method has significant effect in improving the accuracy and stability of Ground Penetrating Radar data processing, and this study is of great significance for the practical application of Ground Penetrating Radar.

This paper reviews biomechanical labor education and practice concepts with lasting health objectives for expectant mothers during childbirth. Some of the areas of concern highlighted are inadequacies of routine obstetric practice, lack of adequate training among healthcare givers, and lack of appropriate tools for assessment. The remedies recommended by the research study include developing a standard training package, financing biomechanical assessment technology, and encouraging professional interconnection among medical specialists. Such solutions are possible and realistic as they are based on current educational models and implemented technologies, focusing on applying researched methods. In incorporating biomechanics into maternity care, this study suggests better labor conditions and birth outcomes for mothers and babies.