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Chemosphere Aug 2024Easy synthesis of efficient, non-toxic photocatalysts is a target to expand their potential applications. In this research, the role of Eu doping in the non-toxic,...
Easy synthesis of efficient, non-toxic photocatalysts is a target to expand their potential applications. In this research, the role of Eu doping in the non-toxic, affordable, and easily prepared MgAl hydrotalcite-like compounds (HTlcs) was explored in order to prepare visible light semiconductors. Eu doped MgAl-HTlcs (MA-xEu) samples were prepared using a simple coprecipitation method (water, room temperature and atmospheric pressure) and europium was successfully incorporated into MgAl HTlc frameworks at various concentrations, with x (Eu/M percentage) ranging from 2 to 15. Due to the higher ionic radius and lower polarizability of Eu cation, its presence in the metal hydroxide layer induces slight structural distortions, which eventually affect the growth of the particles. The specific surface area also increases with the Eu content. Moreover, the presence of Eu 4f energy levels in the electronic structure enables the absorption of visible light in the doped MA-xEu samples and contributes to efficient electron-hole separation. The microstructural and electronic changes induced by the insertion of Eu enable the preparation of visible light MgAl-based HTlcs photocatalysts for air purification purposes. Specifically, the optimal HTlc photocatalyst showed improved NO removal efficiency, ∼ 51% (UV-Vis) and 39% (visible light irradiation, 420 nm), with excellent selectivity (> 96 %), stability (> 7 h), and enhanced release of •O radicals. Such results demonstrate a simple way to design photocatalytic HTlcs suitable for air purification technologies.
Topics: Europium; Catalysis; Magnesium Hydroxide; Aluminum Hydroxide; Oxidation-Reduction; Nitrogen Oxides; Photochemical Processes; Light; Air Pollutants
PubMed: 38851500
DOI: 10.1016/j.chemosphere.2024.142555 -
The effects of impurities in carbide slag on the morphological evolution of CaCO during carbonation.Journal of Environmental Management Jul 2024Carbide slag (CS) is a kind of solid waste generated by the hydrolysis of calcium carbide for acetylene production. Its major component is Ca(OH), which shows great...
Carbide slag (CS) is a kind of solid waste generated by the hydrolysis of calcium carbide for acetylene production. Its major component is Ca(OH), which shows great potential in CO mineralization to produce CaCO. However, the types of impurities in CS and their mechanisms for inducing the morphological evolution of CaCO are still unclear. In this work, the influence of impurities in CS on the morphology evolution of CaCO was investigated. The following impurities were identified in the CS: AlO, MgO, FeO, SiO and CaCO. Ca(OH) was used to study the influence of impurities (AlO and FeO) on the evolution of CaCO morphology during CS carbonation. Calcite (CaCO) was the carbonation product produced during CS carbonation under varying conditions. The morphology of calcite was changed from cubic to rod-shaped, with increasing solid-liquid ratios. Moreover, rod-shaped calcite was converted into irregular particles with increasing CO flow rate and stirring speed. Rod-shaped calcite (CaCO) was formed by CS carbonation at a solid-liquid ratio of 10:100 under a stirring speed of 600 rpm and a CO flow rate of 200 ml/min; and spherical calcite was generated during Ca(OH) carbonation under the same conditions. AlO impurities had negligible effects on spherical CaCO during Ca(OH) carbonation. In contrast, rod-shaped CaCO was generated by adding 0.13 wt% FeO particles, similar to the content of FeO in CS. Rod-shaped calcite was converted into particulate calcite with increasing FeO content. The surface wettability and surface negative charge of FeO appeared to be responsible for the formation of rod-shaped CaCO. This study enhances our understanding and utilization of CS and CO reduction and the fabrication of high-value rod-shaped CaCO.
Topics: Calcium Carbonate; Solid Waste; Carbon Dioxide; Carbon Compounds, Inorganic; Acetylene
PubMed: 38850924
DOI: 10.1016/j.jenvman.2024.121361 -
Journal of Environmental Management Jul 2024Enzyme-induced calcium carbonate precipitation (EICP) and microbially-induced calcium carbonate precipitation (MICP) techniques represent emerging trends in soil...
Enzyme-induced calcium carbonate precipitation (EICP) and microbially-induced calcium carbonate precipitation (MICP) techniques represent emerging trends in soil stabilization. However, the impact of soil density on biomineralization, particularly in historical earthen sites, remains unclear. This study compares the consolidation effects of EICP and MICP on cylindrical samples (10 cm × 5 cm) with three densities (1.5 g/cm, 1.6 g/cm, and 1.7 g/cm) derived from the soil near the UNESCO World Cultural Heritage Site of Suoyang Ancient City, Gansu Province, China. Results showed that calcium carbonate production increased across all densities through bio-cementation, with higher densities producing more calcium carbonate. MICP-treated specimens exhibited larger increases in calcium carbonate production compared to those treated with EICP. Specimens with a density of 1.7 g/cm³ showed a wave velocity increase of 3.26% (EICP) and 7.13% (MICP), and an unconfined compressive strength increase of 8% (EICP) and 26% (MICP). These strength increases correlated with the generation of calcium carbonate. The findings suggest that biomineralization can be effectively utilized for in situ consolidation of earthen sites, emphasizing the importance of considering soil density in biologically-based conservation technologies. Furthermore, MICP shows potential advantages over EICP in providing stronger, compatible and more sustainable soil reinforcement.
Topics: Calcium Carbonate; Biomineralization; Soil; China
PubMed: 38850919
DOI: 10.1016/j.jenvman.2024.121410 -
Environmental Geochemistry and Health Jun 2024The Ras Elma region, situated to the south of the city of Taza in northern Morocco, boasts abundant travertine formations that continue to develop, albeit selectively in...
The chemical state of the watershed in Ras Elma region (South of Taza, Morocco) one of the parameters responsible for the decline in the formation of the current travertine formations.
The Ras Elma region, situated to the south of the city of Taza in northern Morocco, boasts abundant travertine formations that continue to develop, albeit selectively in specific sheltered sites. This development is influenced by various parameters, including the role of water chemistry. This article presents a spatio-temporal analysis of various hydrochemical parameters, including conductivity, pH, temperature, magnesium, calcium, and others. It's worth noting that the water from the Ras Elma Vauclusian spring, a key driver of travertinization in the region, is sourced from water infiltrating through faults and flowing into Lake Tompraire, known as Dayat Chikker near the Bab Boudir area. The findings suggest that the water in Ras Elma has turned aggressive, as revealed by the examination of the calcaro-carbonic equilibrium. CaCO precipitation occurs predominantly in the summer, significantly impacting the formation of travertines, particularly those of the spring and dam types. However, valley-type travertines exhibit more extensive development compared to the other two types.
Topics: Morocco; Temperature; Environmental Monitoring; Hydrogen-Ion Concentration; Calcium; Natural Springs; Magnesium; Seasons; Calcium Carbonate; Lakes
PubMed: 38849593
DOI: 10.1007/s10653-024-01971-y -
Medicine Jun 2024Ileal perforation caused by the insertion of a drainage tube is a rare complication. Hence, the utilization of surgical drains in abdominal surgery remains... (Review)
Review
RATIONALE
Ileal perforation caused by the insertion of a drainage tube is a rare complication. Hence, the utilization of surgical drains in abdominal surgery remains controversial. At present, there is a trend to reduce the utilization of drains in abdominal surgery, although certain situations may necessitate their application.
PATIENT CONCERNS
A 25-year-old Chinese woman presented with a history of right lower abdominal pain persisting for 10 days. Imaging examinations, including abdominal computed tomography and ultrasound, identified low-density lesions measuring 10 × 8 × 8cm3 in the right lower abdomen, which are consistent with perforated appendicitis complicated by a peri-appendiceal abscess. A laparoscopic appendectomy was carried out. On the 5th postoperative day, the drainage fluid changed to a grass-green color (80mL). Imaging with retrograde contrast through the drainage tube revealed that the 26 Fr silicon rubber drainage tube tip was positioned 50cm away from the ileocecal junction within the ileum. Both the ileal and ileocecal regions appeared well-developed.
INTERVENTION AND OUTCOMES
Oral intake was suspended, and the patient received antacids, somatostatin, antibiotics, and total parenteral nutrition. On the 19th postoperative day, a follow-up imaging procedure using retrograde contrast through the drainage tube indicated that the tube tip was sealed. The treatment concluded on day 33 postoperatively, and the patient was discharged.
DISCUSSION AND CONCLUSION
Ileal perforation due to an abdominal drainage tube following laparoscopic appendectomy constitutes a rare but serious complication. However, due to the adhesion and inflammatory changes around the abscess, laparoscopic dissection becomes a challenging and risky process, and the surgical skills and experiences are particularly important. Removing the abdominal drainage tube promptly based on the characteristics of the drainage fluid is recommended. The findings provide valuable insights for surgeons navigating similar challenges.
Topics: Humans; Female; Adult; Appendectomy; Drainage; Laparoscopy; Appendicitis; Ileum; Intestinal Perforation; Postoperative Complications
PubMed: 38847709
DOI: 10.1097/MD.0000000000038405 -
Dalton Transactions (Cambridge, England... Jun 2024Bismuth(III) complexes have been reported to act as inhibitors of the enzyme urease, ubiquitously present in soils and implicated in the pathogenesis of several...
Bismuth(III) complexes have been reported to act as inhibitors of the enzyme urease, ubiquitously present in soils and implicated in the pathogenesis of several microorganisms. The general insolubility of Bi(III) complexes in water at neutral pH, however, is an obstacle to their utilization. In our quest to improve the solubility of Bi(III) complexes, we selected a compound reported to inhibit urease, namely [Bi(HEDTA)]·2HO, and co-crystallized it with (i) racemic DL-histidine to obtain the conglomerate [Bi(HEDTA)(μ-D-His)]·6HO + [Bi(HEDTA)(μ-L-His)]·6HO, (ii) enantiopure L-histidine to yield [Bi(HEDTA)(μ-L-His)]·6HO, and (iii) cytosine to obtain [Bi(HEDTA)]·Cyt·2HO. All compounds, synthesised by mechanochemical methods and by slurry, were characterized in the solid state by calorimetric (DSC and TGA) and spectroscopic (IR) methods, and their structures were determined using powder X-ray diffraction (PXRD) data. All compounds show an appreciable solubility in water, with values ranging from 6.8 mg mL for the starting compound [Bi(HEDTA)]·2HO to 36 mg mL for [Bi(HEDTA)(μ-L-His)]·6HO. The three synthesized compounds as well as [Bi(HEDTA)]·2HO were then tested for inhibition activity against urease. Surprisingly, no enzymatic inhibition was observed during assays using urease and assays using cultures of , raising questions on the efficacy of Bi(III) compounds to counteract the negative effects of urease activity in the agro-environment and in human health.
Topics: Bismuth; Urease; Solubility; Enzyme Inhibitors; Coordination Complexes; Agrochemicals
PubMed: 38847020
DOI: 10.1039/d4dt00778f -
Ecotoxicology and Environmental Safety Jul 2024This study aimed to evaluate the effect of adding liquid extract of algae (Hypnea musciformis, Grateloupia acuminata, and Sargassum muticum) (HGS) and Magnesium oxide...
Synergistic effect of green synthesis magnesium oxide nanoparticles and seaweed extract on improving water quality, health benefits, and disease resistance in Nile tilapia.
This study aimed to evaluate the effect of adding liquid extract of algae (Hypnea musciformis, Grateloupia acuminata, and Sargassum muticum) (HGS) and Magnesium oxide nanoparticles (MgO NPs) using this extract to rear water of Oreochromis niloticus, on improving culture water indices, growth performance, digestive enzyme, hemato-biochemical characters, immune, antioxidative responses, and resistance after challenged by Aeromonas hydrophila with specific refer to the potential role of the mixture in vitro as resistance against three strains bacteria (Aeromonas sobria, Pseudomonas fluorescens, P. aeruginosa) and one parasite (Cichlidogyrus tilapia). The first group represented control, HGS0, whereas the other group, HGS5, HGS10, and HGS15 mL of liquid extract, as well as all groups with 7.5 μg mL MgO-NPs added to culture water of O. niloticus, for 60 days. Data showed that increasing levels at HGS 10 and HGS15 mL in to-culture water significantly enhanced growth-stimulating digestive enzyme activity and a significantly improved survival rate of O. niloticus after being challenged with A. hydrophila than in the control group. The total viability, coliform, fecal coliform count, and heavy metal in muscle partially decreased at HGS 10 and HGS15 mL than in the control group. Correspondingly, the highest positive effect on hemato-biochemical indices was noticed at levels HGS 10 and HGS15 mL. Fish noticed an improvement in immune and antioxidant indices compared to control groups partially at HGS 10 and HGS15 mL. Interestingly, fish cultured in rearing water with the mixture provided downregulated the related inflammatory genes (HSP70, TNF, IL-1β, and IL-8) partially at HGS15 mL. In vitro, the mixture showed positive efficiency as an antibacterial and partially antiparasitic at HGS 10 and HGS15 mL. This study proposes utilizing a mixture of (HGS) and (MgO-NPs) with optimum levels of 10-15 mL in cultured water to improve water indices, growth, health status, and increased resistance of O. niloticus against bacterial and parasitic infection.
Topics: Animals; Magnesium Oxide; Cichlids; Disease Resistance; Water Quality; Seaweed; Fish Diseases; Plant Extracts; Nanoparticles; Green Chemistry Technology; Metal Nanoparticles; Aeromonas hydrophila; Sargassum
PubMed: 38843743
DOI: 10.1016/j.ecoenv.2024.116522 -
PloS One 2024This study investigated the effects of different doses of limestone, light durations, light intensities, and vitamins on both the productive performance and egg quality....
This study investigated the effects of different doses of limestone, light durations, light intensities, and vitamins on both the productive performance and egg quality. The study utilized two rearing houses (control and treatment), each accommodating 75000 Lohmann Brown Classic chicks reared in open-sided rearing cages from one day old until they reached 89 weeks of age. Throughout the laying period, the hens were subjected to a specific light regimen (light = 14 h; dark = 10 h a day). At the end of experiment, the treatment group displayed significant (p<0.05) differences compared to the control group across various parameters. Notably, the treatment group exhibited lower daily feed intake (treatment: 112 g/bird vs control: 115 g/bird), 9.6% higher egg production (treatment: 78.5% vs control: 68.9%), lower body weight (treatment: 2057 g vs control: 2073 g), lower feed conversion ratio (FCR)/egg (treatment: 1.44 vs control: 1.69), higher egg weight (treatment: 69.4 g vs control: 68.5 g), greater egg mass (treatment: 56.14 vs control: 48.76), greater shell thickness (treatment: 3.52 mm vs control: 3.44 mm), and greater shell weight (treatment: 9.3 g vs control: 8.79 g). However, the albumin weight, yolk weight, yolk diameter, shape index, and Haugh units (HU) were not significantly (p˃0.05) affected after 75 weeks of treatment when compared with those of the control group. Therefore, this study is the first of its kind to demonstrate that different ratios of limestone, different durations and intensities of light, and different vitamin supplementation doses in the treatment group (subjected to the novel rearing recommendations described in this study) may yield a profit of 180,541 USD, exceeding the baseline profit of the control group (subjected to conventional rearing methods).
Topics: Animals; Chickens; Female; Eggs; Animal Feed; Animal Husbandry; Calcium Carbonate; Vitamins; Egg Shell; Light; Body Weight
PubMed: 38843257
DOI: 10.1371/journal.pone.0305099 -
World Journal of Microbiology &... Jun 2024Microbially induced carbonate precipitation (MICP) has been used to cure rare earth slags (RES) containing radionuclides (e.g. Th and U) and heavy metals with favorable...
Microbially induced carbonate precipitation (MICP) has been used to cure rare earth slags (RES) containing radionuclides (e.g. Th and U) and heavy metals with favorable results. However, the role of microbial extracellular polymeric substances (EPS) in MICP curing RES remains unclear. In this study, the EPS of Lysinibacillus sphaericus K-1 was extracted for the experiments of adsorption, inducing calcium carbonate (CaCO) precipitation and curing of RES. The role of EPS in in MICP curing RES and stabilizing radionuclides and heavy metals was analyzed by evaluating the concentration and morphological distribution of radionuclides and heavy metals, and the compressive strength of the cured body. The results indicate that the adsorption efficiencies of EPS for Th (IV), U (VI), Cu, Pb, Zn, and Cd were 44.83%, 45.83%, 53.7%, 61.3%, 42.1%, and 77.85%, respectively. The addition of EPS solution resulted in the formation of nanoscale spherical particles on the microorganism surface, which could act as an accumulating skeleton to facilitate the formation of CaCO. After adding 20 mL of EPS solution during the curing process (Treat group), the maximum unconfined compressive strength (UCS) of the cured body reached 1.922 MPa, which was 12.13% higher than the CK group. The contents of exchangeable Th (IV) and U (VI) in the cured bodies of the Treat group decreased by 3.35% and 4.93%, respectively, compared with the CK group. Therefore, EPS enhances the effect of MICP curing RES and reduces the potential environmental problems that may be caused by radionuclides and heavy metals during the long-term sequestration of RES.
Topics: Uranium; Calcium Carbonate; Thorium; Metals, Heavy; Extracellular Polymeric Substance Matrix; Bacillaceae; Metals, Rare Earth; Adsorption; Chemical Precipitation
PubMed: 38834810
DOI: 10.1007/s11274-024-04015-w -
Analytica Chimica Acta Jul 2024The sensitive, accurate and rapid detection of carbohydrate antigen 125 (CA125) is essential for the early diagnosis and clinical management of ovarian cancer, but there...
The sensitive, accurate and rapid detection of carbohydrate antigen 125 (CA125) is essential for the early diagnosis and clinical management of ovarian cancer, but there is still challenge. Herein, a photoelectrochemical (PEC) immunosensor based on CdS/BiS/NiS ternary sulfide heterostructured photocatalyst was presented for the detection of CA125. The CdS/BiS/NiS was synthesized by a one-step hydrothermal approach. The heterojunction comprising of CdS and BiS could separate photogenerated carriers, the introduced narrow bandgap NiS could act as electron-conducting bridge to facilitate the transfer of interfacial photogenerated electrons, thereby improving the photoelectric conversion efficiency. Due to their synergistic effect, the photocurrent response produced by the composite was up to 14.6 times of pure CdS. On the basis, a PEC immunosensor was constructed by introducing the CA125 antibody through thioglycolic acid linkage. It was found that the resulting immunosensor showed good performance. Under the optimized conditions, its linear detection range was as wide as 1 pg mL-50 ng mL, and the detection limit was low to 0.85 pg mL. Furthermore, we experimentally tested its anti-interference, stability and reproducibility, and satisfactory results were achieved. The practicable feasibility of the sensor was confirmed by testing serum sample. Thus this work provided a simple, fast and enough sensitive approach for CA125 monitoring.
Topics: Cadmium Compounds; Sulfides; Humans; Electrochemical Techniques; CA-125 Antigen; Bismuth; Limit of Detection; Immunoassay; Biosensing Techniques
PubMed: 38834279
DOI: 10.1016/j.aca.2024.342765