Advances in the Efficient Removal of the Key Radioactive Nuclide Sr Using Crystalline Ion-Exchange Materials: A Review.

Nuclear energy, a rapidly advancing clean energy source, generates significant amounts of radioactive waste, including radioactive nuclides such as cesium (Cs), strontium (Sr), and uranyl (UO ). Among these, Sr is particularly concerning due to its long half-life, high mobility in aqueous environments, and its toxic effects on both human health and ecosystems. Its radioactive decay produces beta particles, posing significant environmental and public health risks, especially in the context of nuclear waste disposal.

Deciphering the key role of biofilm and mechanisms in high-strength nitrogen removal within the anammox coupled partial S-driven autotrophic denitrification system.

Anammox coupled partial S-driven autotrophic denitrification (PSAD) technology represents an innovative approach for removing nitrogen from wastewater. The research highlighted the crucial role of biofilm on sulfur particles in the nitrogen removal process. Further analysis revealed that sulfur-oxidizing bacteria (SOB) are primarily distributed in the inner layer of the biofilm, while anammox bacteria (AnAOB) are relatively evenly distributed in inner and outer layers, with Thiobacillus and Candidatus Brocadia being the dominant species, respectively.

Li[AlPOF(OH)](HO) and [Al(PO)F(HO)]( = K, Rb): Counter Cation Templates Derived Three Polar Alkaline Metal Fluoroaluminophosphates.

Three novel alkali metal fluoroaluminophosphates, Li[AlPOF(OH)](HO) and [Al(PO)F(HO)]( = K, Rb), were designed and synthesized by using low-temperature flux methods. They crystallized in polar space groups and 222, respectively. Li[AlPOF(OH)](HO) features a unique two-dimensional layered structure of fluoroaluminophosphate [AlPOF(OH)], composed of alternately connected AlFO octahedra and PO tetrahedra.

Proteinase K impact on anaerobic co-digestion of modified biodegradable plastic and food waste: Step-by-step analysis with microorganism.

This study was designed to explore the key impact of Proteinase K (PK) on every step of anaerobic co-digestion. The results of step-by-step experiments indicated that PK promoted the hydrolysis of biodegradable plastic by initiating self-hydrolysis reactions, directly promoting the hydrolysis step of anaerobic co-digestion. Subsequently, PK indirectly promoted the acidogenesis and acetogenesis steps by impacting the proliferation of acid-producing bacteria.

Association between acute tobacco exposure and fractional exhaled nitric oxide in patients with chronic obstructive pulmonary disease: National health and Nutrition Examination Survey (NHANES) 2007-2012.

Background: Fractional exhaled nitric oxide (FeNO) is a marker of type 2 airway inflammation. Tobacco exposure can lower FeNO levels. However, the effect of acute tobacco exposure on FeNO in patients with chronic obstructive pulmonary disease (COPD) is unclear.

Non-phytoremediation and phytoremediation technologies of integrated remediation for water and soil heavy metal pollution: A comprehensive review.

Since the 1980s, there has been increasing concern over heavy metal pollution remediation. However, most research focused on the individual remediation technologies for heavy metal pollutants in either soil or water. Considering the potential migration of these pollutants, it is necessary to explore effective integrated remediation technologies for soil and water heavy metals.

Enzyme modified biodegradable plastic preparation and performance in anaerobic co-digestion with food waste.

A modified biodegradable plastic (PLA/PBAT) was developed by through covalent bonding with proteinase K, porcine pancreatic lipase, or amylase, and was then investigated in anaerobic co-digestion mixed with food waste. Fluorescence microscope validated that enzymes could remain stable in modified the plastic, even after co-digestion. The results of thermophilic anaerobic co-digestion showed that, degradation of the plastic modified with Proteinase K increased from 5.

Rabbit intakes and predictors of their length of stay in animal shelters in British Columbia, Canada.

Domestic rabbits (Oryctolagus cuniculus) are the fourth most common species admitted to the British Columbia Society for the Prevention of Cruelty to Animals (BC SPCA) shelter system. However, shelter data analysis has largely focused on cats and dogs and little is known about the population dynamics of rabbits in shelters. We analyzed five years of rabbit records (n = 1567) at the BC SPCA to identify trends in intake and predictors of length of stay (LOS) of rabbits.

Interaction Effects between the Main Components of Protein-Rich Biomass during Microwave-Assisted Pyrolysis.

The interaction effects between the main components (proteins (P), carbohydrates (C), and lipids (L)) of protein-rich biomass during microwave-assisted pyrolysis were investigated in depth with an exploration of individual pyrolysis and copyrolysis (PC, PL, and CL) of model compounds. The average heating rate of P was higher than those of C and L, and the interactions in all copyrolysis groups reduced the max instant heating rate. The synergistic extent () of PC and PL for bio-oil yield was 16.

Selective oxidation of β-keto ester modulated by the d-band centers in D-A conjugated microporous metallaphotoredox catalysts containing M-salen (MZn, Cu and Co) and triazine monomers.

Photocatalytic selective oxidation plays an important role in developing green chemistry. However, it is challenging to design an efficient photocatalyst for controlling the selectivity of photocatalytic oxidation reaction and exploring its detailed mechanism. Here, we synthesized three conjugated microporous polymers (CMPs) with D-A structures, named M-SATE-CMPs (MZn, Cu and Co), with different d-band centers based on different metal centers, resulting in the discrepancy in adsorption and activation capacities for the reactants, which produces the selectivity of β-keto esters being catalyzed into α-hydroperoxide β-keto esters (ROOH) or to α-hydroxyl β-keto esters (ROH).

Efficient utilization of photoelectron-hole at semiconductor-microbe interface for pyridine degradation with assistance of external electric field.

In this study, enhanced pyridine bio-photodegradation with assistance of electricity was achieved. Meanwhile, photoelectron-hole played a vital role in accelerating pyridine biomineralization. The significant separation of photoelectron-hole was achieved with an external electric field, which provided sufficient electron donors and acceptors for pyridine biodegradation.

Enhanced azo dye reduction at semiconductor-microbe interface: The key role of semiconductor band structure.

Low-energy environmental remediation could be achieved by biocatalysis with assistance of light-excited semiconductor, in which the energy band structure of semiconductor has a significant influence on the metabolic process and electron transfer of microbes. In this study, direct Z-scheme and type II heterojunction semiconductor with different energy band structure were successfully synthesized for constructing semiconductor-microbe interface with Shewanella oneidensis MR-1 to achieve acid orange7 (AO7) biodegradation. UV-vis diffuse reflection spectroscopy, photoluminescence spectra and photoelectrochemical analysis revealed that the direct Z-scheme heterojunction semiconductor had stronger reduction power and faster separation of photoelectron-hole, which was beneficial for the AO7 biodegradation at semiconductor-microbe interface.

Embedded racetrack microring resonator sensor based on GeSbSe glasses: erratum.

We correct the error in [Opt. Express31, 1103(2023)10.1364/OE.

Novel miniature transendoscopic telerobotic system for endoscopic submucosal dissection (with videos).

Background And Aims: The lack of tissue traction and instrument dexterity to allow for adequate visualization and effective dissection were the main issues in performing endoscopic submucosal dissection (ESD). Robot-assisted systems may provide advantages. In this study we developed a novel transendoscopic telerobotic system and evaluated its performance in ESD.

Sulfadiazine removal efficiency with persulfate driven by electron-rich Cu-beta zeolites.

Surface electron transport and transfer of catalysts have important consequences for persulfate (PS) activation in PS system. In this paper, an electron-rich Cu-beta zeolites catalyst was synthesized utilizing a straightforward solid-state ion exchange technique to efficiently degrade sulfadiazine. The X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FTIR) results revealed that Cu element substitutes Al element and enters the beta molecular sieve framework smoothly.

Potent Zinc(II)-Based Immunogenic Cell Death Inducer Triggered by ROS-Mediated ERS and Mitochondrial Ca Overload.

and are Zn-based complexes that activate the immunogenic cell death (ICD) effect by Ca-mediated endoplasmic reticulum stress (ERS) and mitochondrial dysfunction. Compared with , effectively caused reactive oxidative species (ROS) overproduction in the early phase, leading to ERS response. Severe ERS caused the release of Ca from ER to cytoplasm and further to mitochondria.

Indolization of -Aryl Tertiary Amines with Diazoacetates by a Single Organophotocatalyst.

Diazoacetates are widely used to synthesize highly valuable indoles. Previous research has focused on using metal carbene reactivity or the innate nucleophilicity of the diazoacetates to create indoles through a traditional two-electron pathway. However, these strategies are constrained by the need for transition metals, oxidants, or substrate prefunctionalization.

Embedded racetrack microring resonator sensor based on GeSbSe glasses.

In this article, a compact racetrack double microring resonator (MRR) sensor based on GeSbSe (GeSbSe) is investigated. The sensor device consists of a racetrack microring, an embedded small microring, and a strip waveguide. Electron beam lithography (EBL) and dry etching are used to fabricate the device.

Mechanistic insight into borrowing-hydrogen -alkylation catalyzed by an MLC catalyst with dual proton-responsive sites.

Metal-ligand cooperation (MLC) catalysis is one of the most important concepts in the field of organometallic catalysis. However, diverse functional ligands result in ambiguous mechanisms and constrain the understanding of MLC catalysis. Herein, a theoretical study based on DFT calculations is performed to shed light on the mechanistic preference of borrowing-hydrogen -alkylation catalysed by a ruthenium complex with dual proton-responsive sites.

Synthesis of 2-Pyrazolines with a CF- and Alkyne-Substituted Quaternary Carbon Center via [3 + 2] Cycloaddition of β-CF-1,3-enynes and Diazoacetates.

Given the importance of both the CF group and the alkyne moiety in synthetic/medicinal chemistry, we report here the first example of efficient synthesis of 2-pyrazolines with a CF- and alkyne-substituted quaternary carbon center. This methodology has the advantages of high functional group compatibility, the avoidance of base and open-flask conditions, easily available and easy to handle reagent, and broad substrate scope. Notably, this protocol allows for the late-stage functionalization of biologically active molecules and the gram-scale synthesis.

Enhanced anaerobic reduction of nitrobenzene at high salinity by betaine acting as osmoprotectant and regulator of metabolism.

Anaerobic technology is extensively applied in the treatment of industrial organic wastewater, but high salinity always triggers microbial cell dehydration, causing the failure of the anaerobic process. In this work, betaine, one kind of compatible solutes which could balance the osmotic pressure of anaerobic biomass, was exogenously added for enhancing the anaerobic reduction of nitrobenzene (NB) at high salinity. Only 100 mg L betaine dosing could significantly promote the removal efficiency of NB within 35 h at 9% salinity (36.

Efficient Activation of Peroxymonosulfate by Biochar-Loaded Zero-Valent Copper for Enrofloxacin Degradation: Singlet Oxygen-Dominated Oxidation Process.

The removal of contaminants of emerging concern (CECs) has become a hot research topic in the field of environmental engineering in recent years. In this work, a simple pyrolysis method was designed to prepare a high-performance biochar-loaded zero-valent copper (CuC) material for the catalytic degradation of antibiotics ENR by PMS. The results showed that 10 mg/L of ENR was completely removed within 30 min at an initial pH of 3, CuC 0.

Robust Oxygen Reduction Electrocatalysis Enabled by Platinum Rooted on Molybdenum Nitride Microrods.

Robust oxygen reduction electrocatalysis is central to renewable fuel cells and metal-air batteries. Herein, Pt nanoparticles (NPs) rooted on porous molybdenum nitride microrods (Pt/MoN MRs) are rationally constructed toward the oxygen reduction reaction (ORR). Owing to the desired composition with strong electronic metal-support interactions (EMSIs) and a porous one-dimensional structure supporting ultrafine NPs, the developed Pt/MoN MRs possess much higher ORR mass and specific activities than commercial Pt/C.