Journal of Functional Foods
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2023
·
IF 5.6
Rui Zhang,Xudong Lin,Ying Song,Yanfeng Tuo,Guangqing Mu,Shujuan Jiang
Constipation is a common intestinal disease and is correlated with gut microbiota dysbiosis. Given that current drug treatments can cause side effects, probiotics treatment may be a promising alternative approach. In this study, four strains of Lactiplantibacillus plantarum which have the ability to alleviate intestinal inflammation were selected, including L. plantarum AHQ-14, HM-22 isolated from Xinjiang dairy products, and L. plantarum Y12, Y44 isolated from turbot intestine in Dalian market. The effects of L. plantarum strains on loperamide-induced constipation in mice were measured and the potential mechanisms were illustrated by constipation and physicochemical indexes, histological morphology, metabolites and microbiota composition analysis. The results of this study suggested that L. plantarum Y44 could somewhat relieve the symptoms in mice with constipation, while it could not relieve constipation by improving gastrointestinal regulatory peptides and 5-HT levels. The study also found that L. plantarum AHQ-14, HM-22 and Y12 significantly increased the fecal water content and improved GI motility, regulated the levels of gastrointestinal regulatory peptides and 5-HT, and increased the concentration of short-chain fatty acids (SCFAs) on fecal in constipated mice. Furthermore, L. plantarum AHQ-14, HM-22 and Y12 significantly altered the microbiota flora of constipated mice by increased the abundance of potentially beneficial bacteria (e.g. Lactobacillus and Alistipes ) and decreased potentially pathogenic bacteria (e.g. Erysipelatoclostridium and Helicobacter ). These results suggested that L. plantarum AHQ-14, HM-22 and Y12 could effectively relieved constipation in mice by loperamide-induced and have potential application value in constipation treatment.
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ENVIRONMENTAL RESEARCH
·
2023
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IF 8.3
Zhuangzhuang Zhang,Haiqian Zhao,Zhonghua Wang,Zhipei Hu,Qingshu Wang,Erlin Meng,Shiwei Lai,Jiaxin Ying,Hongguang Li,Chuanyan Wu
The use of the electro-Fenton process to continuously generate H 2 O 2 and efficiently degrade organic pollutants is considered a promising technology . The ratio of generation of H 2 O 2 is usually regarded as the critical step; however, how the H 2 O 2 is utilized is also of particular importance. Herein, activated carbon was activated at different temperatures and used to explore the effect of nitrogen doping on the production and utilization of H 2 O 2 in the electro-Fenton-based degradation of organic pollutants. The experimental results indicate that nitrogen-doped activated carbon simultaneously promotes the generation and utilization of H 2 O 2 , which is attributed to the regulation of the competition between phenol and O 2 adsorption by the doped nitrogen. Nitrogen doping not only improves 2e − ORR selectivity but also aggregates phenol near the cathode to balance the concentrations of phenol and ·OH. Density functional theory (DFT) calculations further confirmed that pyrrole-N as a dopant promoted the adsorption of phenol , while pyridine-N was more favorable for O 2 adsorption. The unique balance of nitrogen types possessed by modified activated carbon NAC-750 permits the efficient synergistic generation and utilization of H 2 O 2 in a balanced manner during the degradation of phenol. This work provides a new direction for the rational nitrogen-doping modification of activated carbon for the electro-Fenton-based degradation of organic pollutants.
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
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IF 13.6
Yuzhu Zhang,Yao Pei,Qian S. Liu,Yurou Gao,Ke Min,Zigu Chen,Zhao Shu,Qian Liu,Qunfang Zhou,Guibin Jiang
Atmospheric particulate matter (PM) perturbs hematological homeostasis by targeting the plasma kallikrein-kinin system (KKS), causing a cascade of zymogen activation events. However, the causative components involved in PM-induced hematological effects are largely unknown. Herein, the standard reference materials (SRMs) of atmospheric PM, including emissions from the diesel (2975), urban (1648a), and bituminous coal (2693), were screened for their effects on plasma KKS activation, and the effective constituent contributing to PM-induced KKS activation was further explored by fraction isolation and chemical analysis. The effects of three SRMs on KKS activation followed the order of 2975 > 1648a > 2693, wherein the fractions of 2975 isolated by acetone and water, together with the insoluble particulate residues, exerted significant perturbations in the hematological homeostasis. The soot contents in the SRMs and corresponding isolated fractions matched well with their hematological effects, and the KKS activation could be dependent on the soot surface oxidation degree. This study, for the first time, uncovered the soot content in atmospheric PM with different origins contributed to the distinct effects on plasma KKS activation. The finding would be of utmost importance for the health risk assessment on inhaled airborne fine PM , given its inevitable contact with human circulatory system.
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Environmental Science-Processes & Impacts
·
2023
·Vol. 25
·期 8
·1311-1321
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IF 5.5
Ke Min,Shenxi Deng,Zhao Shu,Yong Li,Bo Chen,Ming Ma,Qian Liu,Guibin Jiang
Elemental carbon (EC) and organic carbon (OC) exist ubiquitously and interact mutually in the environment. Simultaneous analysis of EC and OC will greatly advance our understanding of the behavior and fate of EC and OC, but is however still a great challenge due to the lack of suitable analytical tools. Here, we report a matrix-free laser desorption/ionization mass spectrometry (LDI-MS) method capable of simultaneous analysis of EC and OC by monitoring two independent groups of specific MS fingerprint peaks. We found that EC itself can generate carbon cluster peaks in the low mass range under laser excitation, and meanwhile it can also serve as a matrix to assist the ionization of OC in LDI-MS. By using per- and polyfluoroalkyl substances (PFASs) as a typical set of OC and carbon black (CB) as a model EC, we successfully monitored the adsorption process of PFASs on CB enabled by LDI-MS. We show that hydrophobic interaction dominates the sorption of PFASs to CB, which was affected by the functional groups and carbon chain length of PFASs. Furthermore, environmental substances in water such as humic acid (HA) and surfactants can significantly affect the adsorption of PFASs on CB probably by changing the adsorption sites of CB. Overall, we demonstrate that LDI-MS offers a versatile and high-throughput tool for simultaneous analysis of EC and OC species in real environmental samples, which makes it promising for investigating the environmental behaviors and ecological risks of pollutants.
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Batteries-Basel
·
2023
·Vol. 9
·期 6
·326
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IF 4
Congcong Lu,Chengyu Tu,Yu Yang,Yunping Ma,Maiyong Zhu
Considering their high abundance in the earth, iron-based materials have occasionally been regarded as promising electrode materials for supercapacitors. However, monometallic iron-based electrodes still demonstrate an insufficient specific capacitance value in comparison to monometallic Mn-, Ni-, and Co-based compounds and their combined materials. Herein, an enhanced iron-based heterostructure of Fe3O4@Fe2P was prepared via the in situ phosphorization of Fe3O4. Compared to pristine Fe3O4, the Fe3O4@Fe2P heterostructure showed a capacity enhancement in KOH aqueous solution. The improved electrochemical performance can be attributed to both the core shell structure, which favors buffering the collapse of the electrode, and the synergistic effect between the two iron compounds, which may provide abundant interfaces and additional electrochemically active sites. Moreover, the assembled asymmetric supercapacitor device using the Fe3O4@Fe2P heterostructure as the positive electrode and activated carbon as the negative electrode delivers a high energy density of 13.47 Wh kg−1, a high power density of 424.98 W kg−1, and an acceptable capacitance retention of 78.5% after 5000 cycles. These results clarify that monometallic Fe based materials can deliver a potential practical application. In addition, the construction method for the heterostructure developed here, in which different anion species are combined, may represent a promising strategy for designing high-performance electrodes.Keywords:Fe3O4;Fe2P;supercapacitor
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PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Jialing Tan,Jiayin Liu,Juanjuan Sun,Yunjie Yin,Chaoxia Wang
Thermally responsive photonic crystals (TRPCs) are intelligent responsive materials that can dynamically coordinate electromagnetic wave transmission, translating thermal stimuli into optical signals and structural color changes. However, it remains a big challenge to develop a robust TRPC, because of the thermochromic mechanism of unstable dramatic volume change that collapses photonic crystal (PC) structure. We demonstrate a highly robust and flexible TRPC film inspired by the chameleon, combining thermochromic dyes (TDs) with PC for a synergistic response. There is only negligible color fluctuation even after 2000 color-change cycles, attributing to no lattice parameter change during the thermal stimulus. Moreover, both positive (transparency to opaque color) and negative (opaque color to transparency) TDs are introduced into TRPC, implementing a full-color RGB thermally-responsive system. The response of the positive-TRPC and negative-TRPC temperatures were 32.0 and 50.5 °C, respectively. A TRPC film with environmental adaptability was designed, which offers a promising route to anti-counterfeiting, steganography and smart window.
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SEPARATION SCIENCE AND TECHNOLOGY
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2023
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IF 2.8
Youyu Li,Baijun Yan
Titanium-bearing blast furnace slag (Ti-bearing BF slag) is an important Ti-bearing resource as it contains almost 8–25% TiO2. Over 80 million tons of Ti-bearing BF slag have been accumulated in China. Therefore, recovering the Ti resource from Ti-bearing BF slag is of significance for the sustainable supply of titanium in China as well as in the world. In this paper, based on the chemical composition characteristic of Ti-bearing BF slag, a magnetic Ulvöspinel (Fe2TiO4) phase was formed by the addition of Fe2O3 in Ti-bearing slag. The effects of roasting temperature, roasting time, molar ratio of Fe2O3 to carbon powder and mass ratio of Fe2O3 to Ti-bearing BF slag on the fromation of Fe2TiO4 phase were investigated. The formation mechanism of the Fe2TiO4 grains was revealed by XRD, SEM-EDS, VSM and dissolution experiments. The result show that when 25% mass of Fe2O3 relative to the Ti-bearing BF slag was added, without adding carbon powder, and roasted at 1400°C for 6 h, a titanium concentrate with 22.5% of TiO2 was obtained, and more than 92% of the total titanium in the Ti-bearing BF slag was recovered.
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NANOTECHNOLOGY
·
2022
·Vol. 33
·期 48
·485404
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IF 3.953
Shang Wu,Xin Xu,Xiangtao Yan,Huanlei Zhao,Chaoyang Liu,Yanbin Wang,Qiong Su,Fenping Yin,Quanlu Yang
In this work, a mild chemical precipitation method and simple hydrothermal treatment of the nickel hexamyanocobaltate precursor strategy are developed to prepare a sea urchin-like CoNi2S4 compound with remarkable specific capacity and excellent cycling stability. The prepared CoNi2S4 has an outstanding specific capacity of 149.1 mA h g−1 at 1 A g−1 and an initial capacity of 83.1% after 3000 cycles at 10 A g−1. Moreover, the porous carbon nanospheres (PCNs) with exhibit cycling stability (94.7% of initial specific capacity after 10 000 cycles at 10 A g−1) are selected as negative electrode to match CoNi2S4 positive electrode for assembly of CoNi2S4//PCNs asymmetric supercapacitor (ASC). Satisfactorily, the as-assembled CoNi2S4//PCNs ASC exhibits an impressive energy density of 41.6 Wh kg−1 at 797 W kg−1, as well as the suitable capacity retention of 82.8% after 10 000 cycles. The superior properties of the device demonstrated that the as-prepared material is potential energy storage material.
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JOURNAL OF CHROMATOGRAPHY A
·
2022
·
IF 4.601
Zhuo Wang,Xinyue Zhang,Qian Yang,Shuaihua Zhang,Guifen Chang,Xiaohuan Zang,Chun Wang,Zhi Wang
ABSTRACT Owing to various health threats associated with phthalic acid esters (PAEs), this category of endocrine-disrupting compounds has attracted more and more public scrutiny. However, the efficient preconcentration of PAEs from complex food-contacted plastics still remains challenging. Herein, three covalent triazine-based frameworks (CTFs) were constructed by facile Friedel-Crafts reactions of cyanuric chloride (CC), with triptycene (TPC), fluorene (FL) and 1,3,5-triphenylbenzene (TPB), respectively. Three CTFs were then employed as solid-phase microextraction (SPME) coatings for the extraction of PAEs. Benefiting from the large surface area and high pore volume, the newly-synthesized CC-TPC based SPME method exhibited large enrichment factors (978–2210), low limits of detection (0.027–0.10 ng g − 1 ), satisfactory linear ranges (0.09–20 ng g − 1 ), acceptable repeatabilities (4.3–9.6%) and high relative recoveries (92.0–104.6%).
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BIOCHEMICAL ENGINEERING JOURNAL
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2022
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IF 4.446
Yajie Li,Weikang Kong,Hongbo Liu,Yaoliang Hong,Tianyin Huang
The aim of our research was to investigate the enhanced anaerobic degradation process of coal gasification wastewater (CGW) by conductive material activated carbon and Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs) with the assistance of co-substrate. The optimal ratio of activated carbon to Fe 3 O 4 NPs (3:1) and the optimal addition of co-substrate (glucose concentration =1500 mg/L) were explored through batch tests. During the long-run reactor experiments, 1500 mg/L glucose was mixed into the influent, and activated carbon-Fe 3 O 4 NPs in a ratio of 3:1 were mixed into the anaerobic sludge. The concentration of total phenols in the effluent was kept around 50 mg/L, with a removal rate of 96% and an increase in methane production to 226 mL/day in the experimental reactor. Compared with the control reactor, the methane yield was increased by 64.6%. Toxicity analysis indicated that the toxicity of CGW can be greatly alleviated by conductive material activated carbon and Fe 3 O 4 NPs coupled with anaerobic co-digestion conditions. Microbial community analysis demonstrated that direct interspecies electron transfer (DIET) may have occurred between exoelectrogens ( Clostridium , Anaerolinea, Mesotoga, Synergistia) and methanogenic endoelectrogens ( Methanobacterium , Methanothrix ) for syntrophic metabolism through activated carbon-Fe 3 O 4 nanoparticles coupled with anaerobic co-metabolism.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xishou Guo,Shu Jiang,Yanrui Wang,Yuanxin Wang,Jinlong Wang,Tianyin Huang,Heng Liang,Xiaobin Tang
Gravity-driven membrane (GDM) filtration is a promising technology for decentralized water and wastewater treatment due to its negligible energy consumption and low maintenance. This study investigated the flux development and permeate quality of the GDM process in treating the secondary effluent, as well as the influences of two practical pre-treatments, including GAC filter and microfiltration (MF), on its filtration performance. The results indicated that the GAC filter could significantly enhance the removal of organic contaminants (i.e., DOC, UV 254 , and fluorescent substances), with an average removal of 70 % for DOC and 80 % for UV 254 , respectively. Meanwhile, GAC/GDM systems exhibited a superior removal performance of manganese and sulfamethoxazole (SMX) for more than 95 % and 80 %, respectively. Furthermore, the optimized mixing ratio between GAC permeates and secondary effluent was 7:3 (GAC7:3) to reach a flux level close to the GDM control and achieve a superior permeate water quality than the other processes. The flux of GDM control could stabilize at the level of 5.47 ± 0.71 L m −2 h −1 during long-term filtration. Unexpectedly, limited flux improvements were observed with the pre-treatments, and the stable flux of GAC/GDM and MF/GDM was close to or slightly lower than the GDM control. In GDM control, a rough, heterogeneous, and porous biocake layer was observed on the membrane surface. By contrast, the cake layer structures in the GDM system coupled with pre-treatments appeared denser, compact, and homogeneous, resulting in relatively lower stable flux relative to the GDM control. The economic assessment indicated that the optimized process of GAC7:3 showed a significant cost advantage in the small and medium-scale water reuse scenarios. These findings were beneficial to develop new energy-saving membrane-based technology for the reclamation of wastewater.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Yuhan Cui,Chunyan Zhao,Lijie Zhao,Xiaohong Zhang,Jianxin Wang
As a new environment-friendly energy storage system between traditional capacitors and lithium-ion batteries, supercapacitors have many excellent characteristics compared with other energy storage devices. The new electrode material is the key component to determine the performance of the supercapacitor. Combined with the relevant literature reports of researchers in recent years, the structure and properties of Co, Zn, Ni and other materials were introduced, and the preparation method of Co–Zn as electrode material was sorted out. The rGO/Zn 0.773 Co 0.227 S composites were prepared by a simple template method to analyze the structure and morphology, and rGO/Zn 0.773 Co 0.227 S was treated to make it a paste adhering to nickel foam. Benefiting from the synergistic effect between Zn 0.773 Co 0.227 S and rGO , the composite provides significantly improved energy storage capability in a three-electrode system. The specific capacitance can reach 1680 F g −1 at the current density of 1 A g −1 . When the current density is increased to 10A g −1 , the specific capacitance still reaches 895.4 F g −1 , and the loss of the specific capacitance is only 22.2% after 5000 cycles at 10 A g −1 . When rGO/Zn 0.773 Co 0.227 S is used as cathode material and AC as negative material, asymmetric supercapacitor also has good cycle stability and high energy density .
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