A novel amidoxime-functionalized magnetic hydroxyapatite (AFNH) was successfuly fabricated to extract uranium from aqueous solution and seawater. The introduction of amidoxime group not only ...increased the number of active site of AFNH to speed up the adsorption rate and increase the extraction capacity, but also adjusted the optimal extraction pH from 4 to 8, which was beneficial for capturing uranium from seawater. The maximum adsorption capacity and adsorption efficiency at pH 8 were 945.2 mg g−1 and 99.2%, respectively. AFNH still had good removal efficiency (above 90%) after five cycles, indicating the good regeneration of AFNH. After uranium adsorption, AFNH could be easily recycled by magnetic separation due to its magnetism. In simulated seawater, AFNH also showed excellent uranium removal performance with high adsorption efficiency (84.9%) and adsorption capacity (1.70 mg g−1). Furthermore, the 14-day uranium extraction capacity of AFNH in natural seawater could reach 5.93 mg g−1. The SEM, FTIR, XRD and XPS analyses showed that the enhanced uranium extraction performance of AFNH was mainly attributed to electrostatic interaction, complexation and co-precipitation. In conclusion, AFNH was expected to be a candidate as adsorbent with great potential in extracting uranium from seawater.
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•A novel amidoxime-functionalized magnetic hydroxyapatite (AFNH) was successfully designed.•AFNH possessed excellent uranium extraction performance in alkaline conditions.•The removal efficiency of AFNH was still higher than 90% after five cycles.•Electrostatic interaction, complexation and co-precipitation were the main mechanisms of AFNH.
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•The predominate phyla were Firmicutes (0.40–0.08) and Actinobacteria (0.03–0.08).•The abundant Olsenella and Clostridium were the superior genera.•Volatile fatty acids composition ...and the bacterial community had a strong correlation.•A higher organic loading rate affected the bacterial community specialization.
This study was designed to evaluate the microbial profiling of anaerobic digestion during the processing of sewage sludge and food waste to volatile fatty acids (VFAs) in an immersed membrane bioreactor (iMBR) operating with a distinct organic loading rate (OLR). The results indicated that Firmicutes (0.17–0.38) and Actinobacteria (0.20–0.32) phyla dominated in anaerobic digestion with OLRs of 4 and 8 g VS/L/d, while Firmicutes (0.04–0.08), Actinobacteria (0.03–0.08) and Proteobacteria (0.02) were more abundant with OLR of 6 and 10 g VS/L/d in the bioreactors. Subsequently, the abundance of the Clostridium and Lactobacillus genera were responsible for higher yields of acetate, butyrate, caproate and lactate. The species of Clostridium sp. W14A (0.04–0.06), Bacterium OL-1(0.01–0.30) and Lactobacillus mucosae (0.002–0.01) were rich for both OLR dosages. Additionally, network and redundancy analysis confirmed that Clostridium sp. W14A, Bacterium MS4 and Lactobacillus had significant correlations with the VFAs produced, such as acetate, butyrate, and caproate. Variation analysis also demonstrated an appreciable correlation between environmental factors and the bacterial community. Overall, this bacterial community was dominated by the Firmicutes (0.04–0.38) phylum and Clostridium sp. W14A (0.04–0.60) species, which is a clear indicator of a lower population of acetogenic bacteria associated with greater VFAs generation.
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•This review explores the potential of using a wide range of apple orchard waste (AOW).•Thermochemical and biological processes were assess towards to circular bioeconomy.•This review ...explores the potential for the use of AOW to produce multi bio-products.•The nature of AOW role in achieving successful circular bio economy is also highlighted.•Sustainable interventions with biorefineries approaches still need look for AOW.
In this review investigate the apple orchard waste (AOW) is potential organic resources to produce multi-product and there sustainable interventions with biorefineries approaches to assesses the apple farm industrial bioeconomy. The thermochemical and biological processes like anaerobic digestion, composting and , etc., that generate distinctive products like bio-chemicals, biofuels, biofertilizers, animal feed and biomaterial, etc can be employed for AOW valorization. Integrating these processes can enhanced the yield and resource recovery sustainably. Thus, employing biorefinery approaches with allied different methods can link to the progression of circular bioeconomy. This review article mainly focused on the different biological processes and thermochemical that can be occupied for the production of waste to-energy and multi-bio-product in a series of reaction based on sustainability. Therefore, the biorefinery for AOW move towards identification of the serious of the reaction with each individual thermochemical and biological processes for the conversion of one-dimensional providences to circular bioeconomy.
The lithium–sulfur battery is an attractive option for next‐generation energy storage owing to its much higher theoretical energy density than state‐of‐the‐art lithium‐ion batteries. However, the ...massive volume changes of the sulfur cathode and the uncontrollable deposition of Li2S2/Li2S significantly deteriorate cycling life and increase voltage polarization. To address these challenges, we develop an ϵ‐caprolactam/acetamide based eutectic‐solvent electrolyte, which can dissolve all lithium polysulfides and lithium sulfide (Li2S8–Li2S). With this new electrolyte, high specific capacity (1360 mAh g−1) and reasonable cycling stability are achieved. Moreover, in contrast to conventional ether electrolyte with a low flash point (ca. 2 °C), such low‐cost eutectic‐solvent‐based electrolyte is difficult to ignite, and thus can dramatically enhance battery safety. This research provides a new approach to improving lithium–sulfur batteries in aspects of both safety and performance.
Electrolyte my fire: A new safe eutectic solvent of ϵ‐caprolactam/acetamide can act as an electrolyte for lithium–sulfur batteries. It shows strong resistance to fire, and can dissolve the whole lithium sulfide family (Li2S8–Li2S). It is low‐cost and environmentally friendly. By using this eutectic solvent, capacitance retentions of 68 % over 200 cycles and 95 % over 40 cycles were achieved with and without electrode modification, respectively.
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•Effect of fine coal gasification slag (FCGS) on fungal community was studied.•4% FCGS was the smallest operational taxonomic unit among all treatments.•Ascomycota (91.73%) and ...Basidiomycota (7.75%) were the main fungal phyla.•10% FCGS was a potential concentration to enhance fungal diversity.
The purpose of this study was to investigate fungal diversity and relative abundance (RA) during pig manure composting via high-throughput sequencing approach. Fine coal gasification slag (FCGS) (0%, 2%, 4%, 6%, 8% and 10%) were added into composting raw materials as additive and performed 42 days. Adjust C/N and moisture to 30 and 65%. Results showed that dominant phyla were Ascomycota (99.62%) and Basidiomycota (0.38%). The main genera were Epicoccum (1.26%), Alternaria (83.35%), Aspergillus (12.08%) and Gibberella (1.69%). 10% treatment got the higher abundance and operational taxonomic units number from rank abundance curve and petals diagram. Compared with control, FCGS amendment composting could increase the sanitary time (3–7 d) and total nitrogen (0.05–12.03%). The principal component analysis was considered that FCGS treatments and control had significantly difference. The RA of fungi varied among all treatments. Therefore, 10% treatment was a potential candidate to enhance fungal diversity and composting quality.
Surfactants are amphiphilic molecules that are widely used in consumer products, industrial processes, and biological applications. A critical property of a surfactant is the critical micelle ...concentration (CMC), which is the concentration at which surfactant molecules undergo cooperative self-assembly in solution. Notably, the primary method to obtain CMCs experimentallytensiometryis laborious and expensive. In this study, we show that graph convolutional neural networks (GCNs) can predict CMCs directly from the surfactant molecular structure. In particular, we developed a GCN architecture that encodes the surfactant structure in the form of a molecular graph and trained it using experimental CMC data. We found that the GCN can predict CMCs with higher accuracy on a more inclusive data set than previously proposed methods and that it can generalize to anionic, cationic, zwitterionic, and nonionic surfactants using a single model. Molecular saliency maps revealed how atom types and surfactant molecular substructures contribute to CMCs and found this behavior to be in agreement with physical rules that correlate constitutional and topological information to CMCs. Following such rules, we proposed a small set of new surfactants for which experimental CMCs are not available; for these molecules, CMCs predicted with our GCN exhibited similar trends to those obtained from molecular simulations. These results provide evidence that GCNs can enable high-throughput screening of surfactants with desired self-assembly characteristics.
In this work, a novel g-C3N4 filled, phosphoric-crosslinked chitosan gel bead (P-CS@CN) was successfully prepared to adsorb U(VI) from water. The separation performance of chitosan was improved by ...introducing more functional groups. At pH 5 and 298 K, the adsorption efficiency and adsorption capacity could reach 98.0 % and 416.7 mg g−1, respectively. After adsorption, the morphological structure of P-CS@CN did not change and adsorption efficiency remained above 90 % after 5 cycles. P-CS@CN exhibited an excellent applicability in water environment based on dynamic adsorption experiments. Thermodynamic analyses demonstrated the value of ΔG, manifesting the spontaneity of U(VI) adsorption process on P-CS@CN. The positive values of ΔH and ΔS showed that the U(VI) removal behavior of P-CS@CN was an endothermic reaction, indicating that the increase of temperature was great benefit to the removal. The adsorption mechanism of P-CS@CN gel bead could be summarized as the complexation reaction with the surface functional groups. This study not only developed an efficient adsorbent for the treatment of radioactive pollutants, but also provided a simple and feasible strategy for the modification of chitosan-based adsorption materials.
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•Phosphate groups were successfully functionalized into chitosan chains by crosslinking.•P-CS@CN demonstrated excellent adsorption capacity of 416.7 mg g−1 for U(VI).•Most adsorption occurred before 5 min and reached equilibrium within 20 min.•Phosphate groups coupled with amino and hydroxyl groups played vital roles.
Electrocatalytic dehalogenation (EDH) is a promising green technology for the breakage of strong carbon-chlorine (C-Cl) bonds that have fundamental importance in organic chemistry and environmental ...remediation. The lack of fundamental understanding and practical issues such as potential secondary pollution, side reactions (e.g., hydrogen-evolution reaction), deficiency in catalytic activity, and/or stability have limited the adoption of EDH technology. Here, we address these problems by designing a palladium-based nanocatalyst with precise control of atomic vacancies to exploit the combination of direct and indirect EDH. Experimental and theoretical investigations show that atomic vacancies can promote electron transfer on the catalyst surface to enhance the generation/storage capacity of atomic hydrogen and to simultaneously facilitate dissociative electron transfer to C-Cl bond. Our work guides the design of atomic-vacancy-rich palladium-based electrocatalysts and provides a new strategy for efficient electro-dehalogenation in water and fundamental insights into the relationship of different dehalogenation mechanisms for accurate quantitative prediction.
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•Atomic vacancy-rich palladium nanocatalyst is prepared for electrocatalytic dehalogenation•Concurrence of direct and indirect electron transfer mechanisms is reported•Experimental and theoretical studies show the changes in activity and structure•Quantitative relationship of direct and indirect dehalogenation pathways is found
Reductive dehalogenation of carbon-chlorine bond is of fundamental importance in organic chemistry and has huge implications for environmental applications. Qin et al. prepare an atomic-vacancy-rich palladium-based nanocatalyst to achieve reductive dehalogenation via the simultaneous occurrence of direct and indirect electrocatalytic mechanisms. Experimental and theoretical investigations show that the electrocatalytic activation of organic chlorides is attributed to the enhanced electron transfer on the electrocatalyst surface by atomic vacancies. The methodology to quantitatively predict the relationship of dehalogenation mechanisms is established.
Background
Lung cancer, the most prevalent cancer-related death worldwide, still lacks the means for early diagnosis. Because of the unique properties of the loop that make it stable in body fluids, ...circular RNAs (circRNAs) as a biomarker becomes a possibility. This research purposed to explore whether hsa_circ_0023179 can be applied as a possible biomarker for the early diagnosis and prognosis of non-small cell lung cancer (NSCLC).
Methods
hsa_circ_0023179 was screened by high-throughput sequencing of three pairs of NSCLC tissues and their surrounding tissues. Agarose gel electrophoresis (AGE), Sanger sequencing, exonuclease digestion assay, and actinomycin D were used to affirm the molecular properties of circRNA. Precision determination was performed by placement at room temperature and multiple freeze–thawing test for methodological evaluation. The expression of hsa_circ_0023179 in tissues, serum, and cells was determined by quantitative real-time polymerase chain reaction (qRT-PCR) to establish the receiver operating characteristic (ROC) curve to assess the diagnostic efficacy of hsa_circ_0023179.
Results
hsa_circ_0023179 conforms to the basic properties of circRNA, and the detection method of hsa_circ_0023179 has good stability and repeatability. Its expression was connected to histological type, TNM stage, lymph node metastasis, and distal metastasis in NSCLC tissues, serum, and cells. Compared with traditional tumor markers with higher sensitivity and specificity. A combined diagnosis can significantly improve the diagnostic value. The decrease in postoperative expression level suggests some potential for dynamic monitoring.
Conclusion
hsa_circ_0023179 might be a promising novel serum marker for the detection and prediction of NSCLC.
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•Effect of cow manure biochar on bacterial community were determined during the composting.•The most dominant were Proteobacteria (40.89%-5.65%) and Firmicutes (0.16%-93.18%).•The ...addition of 7.5% cow manure biochar was most beneficial for bacterial diversity.•Cow manure biochar did not significantly influence the microbial metabolic pathways.
The aim of this investigation was to study the effects of cow manure biochar (CMB) on the distribution of heavy metal resistant bacterial (HMRB) community succession during sheep manure (SM) composting. The experiments were conducted with six different ratio of CMB (0%(T1), 2.5%(T2), 5%(T3),7.5%(T4),10%(T5) and 12%(T6)onadryweightbasis) and 0% is used as control. The results showed that the most dominant phylum were Proteobacteria (40.89%-5.65%) and Firmicutes (0.16%-93.18%), and 7.5% CMB mixed with sheep manure for best results. Thus, significant correlation was noticed among the analyzed physicochemical factors, gaseous emission and bacterial phylum in used 7.5–10% CMB applied for SM composting. Overall, the application of biochar increased the diversity of the bacterial community and promoted the degradation of organic matter. In addition, 7.5–10% CMB applied treatments showed greater immobilization of HMRB community succession during SM composting.
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