Degradation of naphthalene in aqueous solution using a microbial symbiotic system founded by degrading and ureolytic bacteria.

Although single bacteria have been applied to the Polycyclic Aromatic Hydrocarbons (PAHs) remediation, its efficacy is severely restricted by long degradation periods and low efficacy. A microbial symbiotic system founded by two or more bacterial strains may be an alternative to traditional remediation approaches. Its construction is, however, hampered by antagonistic interactions and remains challenging.

A dual decomposition integration and error correction model for carbon price prediction.

Accurately predicting carbon prices is crucial for effective government decision-making and maintenance the stable operation of carbon markets. However, the instability and nonlinearity of carbon prices, driven by the complex interaction between economic, environmental, and political factors, often result in inaccurate predictions. To confront this challenge, this paper proposed a carbon price prediction model that integrates dual decomposition integration and error correction.

Investigation on the Thermal Decomposition Behavior of Molybdenum Trioxide Precursor.

The ultrafine MoO powders were prepared by the combination of centrifugal spray drying and calcination in this work. The thermal decomposition behavior of the spherical precursor was studied. The phase constituents, morphologies, particle size, and specific surface areas of MoO powders were characterized at different temperatures.

Mechanical and Ecological Properties of CO Curing Magnesium Slag Concrete.

Magnesium slag is a by-product of the magnesium industry. As an auxiliary cementitious material incorporated into concrete, it can make full use of waste resources and has a certain potential for hydration and carbonation. To improve the mechanical properties of the concrete, the influence mechanism and strengthening mechanism of the carbon curing method on mechanical properties of magnesium slag concrete were investigated.

Decomposing disparities in the utilization of basic public health services between locals and internal migrants in China: the role of social determinants.

Background: Internal migrants in China have long been at a disadvantage in terms of access to publicly financed services, as well as the utilization of public health services. The aim of the study was to examine inequities in the use of basic public health services between internal migrants and the local population and estimate the factors that contributed to inequity in use.

Methods: The data for this study was derived from the 2017 wave of the China Migrants Dynamic Survey.

Toward one-step As(III) removal in ultrafiltration with in situ BioMnO cake layer: Mechanism and feasibility insights.

Inorganic arsenic (As) is one of the most significant chemical contaminants in drinking water worldwide. Although membrane-based technologies are commonly used for As removal, they often encounter challenges including complex operation, high energy consumption, and the need for chemical addition. To address these challenges, we proposed a one-step ultrafiltration (UF) process empowered by in situ biogenic manganese oxides (BioMnO) cake layers without any additional chemicals, to treat source water contaminated with both As and manganese (Mn).

Defect Chemistry Engineering to Regulate the Excellent Value of Nonstoichiometric CaCoO (0 ≤ ≤ 0.06) Ceramics.

Cobalt-based oxides have attracted significant attention as p-type thermoelectric materials due to their wide operational temperature range. However, their low average figure of merit () value has hindered service performance. A series of cation vacancies as Ca-active sites were introduced into CaCoO (0 ≤ ≤ 0.

Machine Learning-Assisted High-Donor-Number Electrolyte Additive Screening toward Construction of Dendrite-Free Aqueous Zinc-Ion Batteries.

The utilization of electrolyte additives has been regarded as an efficient strategy to construct dendrite-free aqueous zinc-ion batteries (AZIBs). However, the blurry screening criteria and time-consuming experimental tests inevitably restrict the application prospect of the electrolyte additive strategy. With the rise of artificial intelligence technology, machine learning (ML) provides an avenue to promote upgrading of energy storage devices.

Two Novel Semi-Quantum Secure Direct Communication Protocols in IoT.

As Internet of Things (IoT) technology continues to advance, there is a growing awareness of IoT security within the industry. Quantum communication technology can potentially significantly improve the communication security of IoT devices. Based on semi-quantum cryptography and utilizing single photons, this paper introduces two semi-quantum secure direct communication (SQSDC) protocols for use in smart door locks.

Fabrication of Polytetrafluoroethylene-Reinforced Fluorocarbon Composite Coatings and Tribological Properties Under Multi-Environment Working Conditions.

Currently, few studies have been conducted on the use of fluorocarbon resin (FEVE) and polytetrafluoroethylene (PTFE) as adhesive substrates and lubricating and anti-corrosion fillers, respectively, for the fabrication of PTFE-reinforced fluorocarbon composite coatings. In this paper, the tribological properties of polytetrafluoroethylene-reinforced fluorocarbon composite coatings were investigated through orthogonal tests under various operating conditions. The optimal configuration for coating preparation under dry friction and aqueous lubrication was thus obtained: the optimal filler particle size, mass ratio of FEVE to PTFE, spraying pressure, and curing agent content were 50 μm, 3:4.

Autotrophic ammonium nitrogen removal process mediated by manganese oxides: Bioreactors performance optimization and potential mechanisms.

Manganese(IV) (Mn(IV)) reduction coupled with ammonium (NH-N) oxidation (Mnammox) has been found to play a significant role in the nitrogen (N) cycle within natural ecosystems. However, research and application of the autotrophic NH-N removal process mediated by manganese oxides (MnOx) in wastewater treatment are currently limited. This study established autotrophic NH-N removal sludge reactors mediated by various MnOx types, including δ-MnO (δ-MSR), β-MnO (β-MSR), α-MnO (α-MSR), and natural Mn ore (MOSR), investigating their NH-N removal performances and mechanisms under different initial N loading and pH conditions.

Simultaneous degradation of roxithromycin and nitrogen removal by Acinetobacter pittii TR1: Performances, pathways, and mechanisms.

Pharmaceutical and aquaculture wastewater contains not only antibiotics but also high concentrations of nitrogen, but few studies have been conducted on bacteria that target this complex pollution for degradation. A novel heterotrophic nitrifying aerobic denitrifying (HN-AD) strain Acinetobacter pittii TR1 isolated from soil. When the C/N ratio was 20, the strain could degrade 50 mg/L roxithromycin (ROX) and the nitrogen removal rate was 96.

New insight into enhanced permanganate oxidation by lignocellulose-derived biochar: The overlooked role of persistent free radicals.

Permanganate (Mn(VII)) is a traditional reagent used for water purification, but it is mild to deal with refractory organic contaminants of emerging concern. There is great interest in combination with effective and low-cost biochar to improve reaction kinetics of Mn(VII). Until recently, it still unclear how biomass composition and carbon structure of biochar influence the Mn(VII) oxidation performance.

A narrow band blue phosphor NaBaAlBOCl:Eu for white light emitting diodes.

Exploring new photoexcited phosphors has attracted attention for improving the performance of white LEDs. Here, an NaBaAlBOCl:Eu phosphor with high color purity (94.11%) has been synthesized.

Electrostatic Harmonization for Superior Charge Extraction at Interface for Stable High-Efficiency FAPbI Quantum Dots Solar Cells.

Organic-inorganic formamidinium lead triiodide (FAPbI) hybrid perovskite quantum dots (QDs) have garnered considerable attention in the photovoltaic field due to their narrow bandgap, exceptional environmental stability, and prolonged carrier lifetime. Unfortunately, their insulating ligands and surface vacancy defects pose significant obstacles to efficient charge transfer across device interfaces. In this work, an electrostatic harmonization strategy at the interface using a donor-acceptor dipole molecular attachment to achieve enhanced charge separation capabilities on the QD surface is ventured.

Self-driven electrochemical system for struvite and energy recovery from digested wastewater: Device optimization strategy and long-term operation.

A self-driven electrochemical system (SDES) was utilized to treat anaerobic digestate wastewater, aiming to achieve wastewater resource utilization and energy generation. The efficiencies of pollutant removal, resource recovery, and energy production were enhanced by adjusting device parameters (anode area, external resistance, and electrode spacing). The high pollutant removal rates and struvite purity were achieved with the magnesium anode area of 15 cm, external resistance of 10 Ω, and electrode spacing of 10 cm.

Study on the selective adsorption of Ag by thermosensitive poly(n-isopropylacrylamide)/guanylthiourea/chitosan composites.

In this work, temperature-responsive poly(N-isopropylacrylamide) (PNIPAM) and the ‌guanylthiourea (GLA) were used to modify chitosan (CS) to prepare a novel PNIPAM/GLA/CS adsorbent for Ag(I) ions. Temperature variations near the lower critical solution temperature (LCST) facilitate the adjustment of functional group distribution within the composite material, thereby influencing its adsorption performance for silver ions. The characteristics of this composite material were confirmed using a variety of techniques, including scanning electron microscopy (SEM), variable-temperature ultraviolet-visible near-infrared spectroscopy, Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS).

Surface Doping to Suppress Iodine Ion Migration for Stable FAPbI Perovskite Quantum Dot Solar Cells.

Formamidine lead iodide (FAPbI) quantum dots (QDs) have attracted great attention as a new generation of photovoltaic material due to their long carrier diffusion length, benign ambient stability, and light-harvesting ability. However, its large surface area with inherent thermodynamic instability and highly defective ionic termination are still major obstacles to fabricating high-performance devices. Herein, a metallic ion dopant is developed to post-treat FAPbI QDs immediately after their fabrication by using a metal-glutamate salt solution.

Comparison of activated sludge and virus interactions in aerobic and anaerobic membrane bioreactors.

Membrane bioreactors (MBRs) are effective sewage treatment technologies, yet the differences in virus removal efficiency between aerobic (AeMBR) and anaerobic membrane bioreactors (AnMBR), remain inadequately understood. This study compared the virus removal efficiency of AeMBR and AnMBR, focusing on the interactions between aerobic (AeS) and anaerobic (AnS) activated sludge and viruses in the sewage treatment process. Results showed average log removal values (LRVs) for MS2 of 2.

Theoretical analysis of additional surrounding rock pressure in shallow buried bias tunnel.

The existing calculation method for the surrounding rock pressure of shallow buried bias tunnel fails to account for the impact of the progressive failure characteristics of the surrounding rock and slope creep, thereby neglecting the additional pressure arising from slope creep. Therefore, the progressive instability failure mode of the surrounding rock of shallow buried bias tunnel was obtained by numerical simulation. Based on this, the theoretical analysis model of the additional pressure of shallow buried bias tunnel was established, and the calculation formula of the additional pressure was derived.

Caterpillar-Inspired Multi-Gait Generation Method for Series-Parallel Hybrid Segmented Robot.

The body structures and motion stability of worm-like and snake-like robots have garnered significant research interest. Recently, innovative serial-parallel hybrid segmented robots have emerged as a fundamental platform for a wide range of motion modes. To address the hyper-redundancy characteristics of these hybrid structures, we propose a novel caterpillar-inspired Stable Segment Update (SSU) gait generation approach, establishing a unified framework for multi-segment robot gait generation.

Spatial variations of soil seed banks in Shanghai's urban wasteland: a gradient analysis of urbanization effects.

Urbanization greatly impacts both the diversity of soil seed banks and the spatial dynamics of species. These seed banks serve as a window into the ecological history and potential for recovery in urban wastelands, which are continually evolving due to urbanization. In this study, we selected 24 plots along urban-rural gradients in Shanghai, China.

Induce (101) plane exposure boosting photocatalytic CO reduction in aerobic environment for NH-MIL-125.

NH-MIL-125 with abundant porosity and specific interactions with CO molecules, has been demonstrate great potential in the field of photocatalytic CO reduction. However, conventional NH-MIL-125 and their composites much lower CO photoreduction efficiency in aerobic environments because of the O competition. To circumvent the issue, this study modifies NH-MIL-125 through crystal facet engineering to enhance its selective CO adsorption and photocatalytic efficiency in the environment of impurity CO.

[Analysis of the Impact of Waste Classification on Carbon Emission Reduction of Waste Treatment in Urban-Rural Integration Mode： A Case Study of Baoji City].

Domestic waste treatment is an important source of anthropogenic greenhouse gas emissions, and it is of great significance to clarify the carbon emission intensity of each link before and after waste classification treatment to help with the "double carbon" goal. Based on the relevant data on domestic waste generation in Baoji City in 2021, combined with the integrated urban and rural domestic waste disposal model, the carbon emission intensity of urban and rural domestic waste treatment before and after classification was calculated using the IPCC inventory guide carbon emission factor method. The results showed that by reducing the proportion of simple landfills in rural areas, the carbon reduction could reach 59 451.

Adsorption and catalytic oxidation removal of Mn by MnO with different crystal structures: Structure-activity relationship and mechanism.

This study investigates the impact of MnO crystal structures on Mn removal in drinking water for the first time. α-, γ-, and δ-MnO phases were synthesized, showing a removal process involving adsorption (Mn was adsorbed as the state of Mn(OH)), saturation, and catalytic oxidation. The adsorption capacity followed δ- > γ- > α-MnO, aligning with the Mn oxidation state.