CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xuedan Cui,Daibing Hou,Yiming Tang,Hantong Qie,Ruiqing Xu,Pengjie Zhao,Aijun Lin,Meng Liu
The current Sulfate Radical Advanced Oxidation Process (SR-AOP) system faces several limitations, such as expensive catalysts, susceptibility to secondary pollutants, limited cycle stability, and suboptimal electron consumption efficiency. Therefore, developing a cost-effective, recyclable, and eco-friendly catalyst holds great promise for improving catalyst performance and electron utilisation efficiency. In this investigation, the effectiveness of natural magnetite treated through ball milling (NMP B ) in activating peroxydisulfate (PDS) to generate sulfate radicals (SO 4 − ) were explored and the combination of NMP B and PDS demonstrated outstanding catalytic efficiency in degrading 2,4,6-trichlorophenol (TCP), achieving a degradation efficiency exceeding 90 % within 6 h. The naturally occurring Fe(II) and graphitised carbon structure within NMP B were crucial in facilitating PDS activation and promoting efficient electron transfer. Subsequently, potential degradation mechanisms for TCP in the NMP B /PDS system was proposed, and the activation mechanism of graphite-carbon enhanced PDS was identified by DFT calculation. Additionally, excellent stability and reusability of NMP B was demonstrated through iron leaching experiment and circulation experiment. Furthermore, TCP degradation intermediates were identified through liquid chromatography combined with mass spectroscopy (LC-MS) and potential TCP degradation pathways were proposed. Importantly, toxicity assessment revealed that the intermediates generated during the TCP degradation process exhibited lower toxicity than TCP. In summary, the NMP B /PDS system demonstrated its effectiveness as an environmentally friendly technology for degrading organic pollutants in contaminated groundwater and surface water environments.
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Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Dong Dong,Shujun Zhang,Weiwei Huo,Ming Zhao,Jun Li,Guohua Dong,Yingnan Zhao,Min Zhu,Zhichun Shi
Antibiotic contamination remains a challenge for wastewater treatment . In this work, a hyper-cross-linked polymer (DHCP-TP 3 ) with a dual nitrogen-rich structure was synthesized by a one-step facile Friedel-Crafts reaction, and a Fe 3 O 4 @DHCP-TP 3 composite was prepared by postmodification with the introduction of magnetic iron oxide nanoparticles (Fe 3 O 4 NPs), which were applied to the adsorption of tetracycline (TC) from aqueous solution. The TC adsorption capacities of the DHCP-TP 3 and Fe 3 O 4 @DHCP-TP 3 composites reached 519.65 and 893.85 mg·g −1 , respectively, and the adsorption processes for both followed the pseudo-second-order kinetic model and the Freundlich isothermal model. Fe 3 O 4 @DHCP-TP 3 can achieve adsorption equilibrium for TC within 200 min, and also exhibits excellent regeneration and magnetic separation capabilities. Complexation, hydrogen bonding, cation exchange and π-π interactions were the main adsorption mechanisms. Moreover, Fe 3 O 4 @DHCP-TP 3 could also adsorb other pollutants, including sulfadiazine (SD), sulfamethoxazole (SMZ), methyl orange (MO), methylene blue (MB), 2,4-dichlorophenol (2,4-DCP), and iodine (I 2 ). The brief synthesis, high adsorption capacity and easy regeneration certified that HCPs were ideal adsorbents for removing pollutants from wastewater.
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Advanced Materials Interfaces
·
2024
·Vol. 11
·期 24
·2400234
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IF 4.3
Xue Shang,Panpan Chen,Wei Ling,Tian Hang
A novel synthesis strategy for hierarchical polypyrrole nanopillar/silver nanoparticle arrays is designed and its application as an antibacterial surface and nonenzymatic H 2 O 2 sensor is explored. The hierarchical structure is fabricated using a microporous membrane-templated method by multiple steps. Using a polypyrrole nanopillar array as the matrix, silver nanoparticles can be uniformly reduced and stably anchored onto the nanopillar array by a redox reaction in a AgNO 3 solution. The morphology, structural characteristics, conductivity, and reaction mechanisms of the composites are studied in detail. The incorporation of Ag nanoparticles not only significantly enhanced the antibacterial activity of the surface, but also contributed to the excellent ability to detect H 2 O 2 . This work provides a versatile approach to achieve the controlled fabrication of hierarchical metal-conducting polymer composite structures and demonstrates them as promising multifunctional interfaces with antibacterial and sensing activity.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2024
·
IF 5.7
Wei-Hua Wang,Chu-Ran Li,Xu-Jie Qin,Xiao-Qin Yang,Si-Da Xie,Qian Jiang,Li-Hua Zou,Ying-Jun Zhang,Guo-Lei Zhu,Ping Zhao
Eleven alkaloids (1–11) including seven new ones, 1–7, were isolated from the solid fermentation of Aspergillus fumigatus VDL36, an endophytic fungus isolated from the leaves of Vaccinium dunalianum Wight (Ericaceae), a perennial evergreen shrub distributed across the Southwest regions of China, Myanmar, and Vietnam. Their structures were elucidated on the basis of extensive spectroscopic methods. The isolates were evaluated for in vitro antifungal activities against five phytopathogenic fungi (Fusarium oxysporum, Coriolus versicolor, Fusarium solani, Botrytis cinerea, Fusarium graminearum). As a result, the new compounds fumigaclavine I (1), 13-ethoxycyclotryprostatin A (5), 13-dehydroxycyclotryprostatin A (6), and 12β-hydroxy-13-oxofumitremorgin C (7) exhibited antifungal activities with MIC values of 7.8–62.5 μg/mL which were comparable to the two positive controls ketoconazole (MIC = 7.8–31.25 μg/mL) and carbendazim (MIC = 1.95–7.8 μg/mL). Furthermore, compounds 1 and 5 demonstrated potent protective and curative effects against the tomato gray mold in vivo. Preliminary structure–activity relationships of the tested indole diketopiperazine alkaloids indicate that the introduction of a substituent group at position C-13 enhances their biological activities.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Hua Ma,Xiuwen Wu,Xiuli Fu,Zhijian Peng
Developing stable, highly active, and economical non-precious metal catalysts for the oxygen evolution reaction (OER) has been highly demanded in the new energy field since it can meet the industrial demands of large-scale electrocatalytic water splitting . A novel FeP/Ni 2 P/Fe 0.64 Ni 0.36 /C (FeNiP–FeNi–C) nanofiber was prepared by electrospinning and high-temperature phosphating. Notably, the good dispersion of FeP, Ni 2 P, and FeNi alloy nanoparticles in the nanocarbon fiber greatly increased the number of electroactive sites, and the synergistic effect between the FeP/Ni 2 P heterogeneous interface and FeNi alloy significantly improved the inherent activity of each site. Moreover, the carbon nanofibers enhanced the long-term durability of the catalyst by preventing the corrosion of the FeP, Ni 2 P, and FeNi alloy particles. Therefore, the optimal FeNiP–FeNi–C catalyst revealed exceptionally high OER activity, with overpotentials of 364 mV and 236 mV at 50 mA cm −2 and 10 mA cm −2 respectively, and the slope of Tafel of 61.00 mV·dec −1 . This catalyst performs significantly better than commercial RuO 2 catalysts in alkaline electrolytes . The results of this study offer a novel perspective for the mass production of non-precious metal OER high-efficiency electrocatalysts .
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Bone Research
·
2024
·Vol. 12
·期 1
·1-12
·
IF 14.3
Yang Jiakang,Shuai Jing,Siow Lixuen,Lu Jingyi,Sun Miao,An Wenyue,Yu Mengfei,Wang Baixiang,Chen Qianming
Reconstruction of irregular oral-maxillofacial bone defects with an inflammatory microenvironment remains a challenge, as chronic local inflammation can largely impair bone healing. Here, we used magnesium silicate nanospheres (MSNs) to load microRNA-146a-5p (miR-146a) to fabricate a nanobiomaterial, MSN+miR-146a, which showed synergistic promoting effects on the osteogenic differentiation of human dental pulp stem cells (hDPSCs). In addition, miR-146a exhibited an anti-inflammatory effect on mouse bone marrow-derived macrophages (BMMs) under lipopolysaccharide (LPS) stimulation by inhibiting the NF-κB pathway via targeting tumor necrosis factor receptor-associated factor 6 (TRAF6), and MSNs could simultaneously promote M2 polarization of BMMs. MiR-146a was also found to inhibit osteoclast formation. Finally, the dual osteogenic-promoting and immunoregulatory effects of MSN+miR-146a were further validated in a stimulated infected mouse mandibular bone defect model via delivery by a photocuring hydrogel. Collectively, the MSN+miR-146a complex revealed good potential in treating inflammatory irregular oral-maxillofacial bone defects.
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BIOMATERIALS
·
2024
·
IF 12.8
Yucheng Ji,Yuwei Hu,Yubo Feng,Lei Liu,Zhanyi Chen,Hongxing Shen,Yingchao Han,He Xu,Lifeng Lao
Currently, mitochondrial dysfunction caused by oxidative stress is a growing concern in degenerative diseases, notably intervertebral disc degeneration (IVDD). Dysregulation of the balance of mitochondrial quality control (MQC) has been considered the key contributor, while it’s still challenging to effectively harmonize different MQC components in a simple and biologically safe way. Hydrogen gas (H 2 ) is a promising mitochondrial therapeutic molecule due to its bio-reductivity and diffusibility across cellular membranes, yet its relationship with MQC regulation remains unknown. Herein, we propose a mitochondrial ‘Birth-Death’ coordinator achieved by an intelligent hydrogen nanogenerator (Fe@HP-OD), which can sustainably release H 2 in response to the unique microenvironment in degenerated IVDs. Both in vitro and in vivo results prove alleviation of cellular oxidative stress and restoration of nucleus pulposus cells function, thereby facilitating successful IVD regeneration. Significantly, this study for the first time proposes the mitochondrial ‘Birth-Death’ coordination mechanism: 1) attenuation of overactivated mitochondrial ‘Death’ process (UPR mt and unselective mitophagy); and 2) activation of Adenosine 5‘-monophosphate-activated protein kinase (AMPK) signaling pathway for mitochondrial ‘Birth-Death’ balance (mitochondrial biogenesis and controlled mitophagy). These pioneering findings can fill in the gaps in molecular mechanisms for H 2 regulation on MQC homeostasis, and pave the way for future strategies towards restoring equilibrium of MQC system against degenerative diseases.
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NANOTECHNOLOGY
·
2024
·Vol. 35
·期 12
·125601
·
IF 2.9
Xia Pu,Wanling Cai,Huayao Chen,Fujie Yang,Xiaomei Mu
The key step in preparing mesoporous silica is to remove the organic template agent, and the most common method used to achieve this goal is high-temperature calcination. However, this method has many disadvantages, one of which is that it reduces the silanol density on the surface of mesoporous silica, which affects its subsequent modification. Ionic liquids (ILs) are often used as extractants. In this work, the 1-butyl-3-methylimidazolium chloride ([C4mim]Cl) IL is considered, and the effects of its concentration, reaction temperature, and reaction time as well as HCl concentration on the extraction rate and silanol density were investigated using an IL extraction template agent (cetyl trimethyl ammonium bromide (CTAB)). The results show that an IL concentration of 10%, a reaction temperature of 120 °C, a reaction time of 12 h, and an HCl concentration of 1% are the best reaction parameters; with these parameters, the extraction rate and the silanol density were found to be 93.19% and 2.23%, respectively. The silanol density of mesoporous silica treated by calcination is only 0.81%. A higher silanol density provides more reaction sites, so that the modified mesoporous silica treated with the IL can be loaded with more Zn ions.
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International Journal of Environmental Research and Public Health
·
2018
·Vol. 15
·期 2
·239
·
IF 2.145
Lin Ma,Chunhai Jiang,Zhenyu Lin,Zhimin Zou
Biosorption using agricultural wastes has been proven as a low cost and efficient way for wastewater treatment. Herein, grape peel treated by microwave- and conventional-hydrothermal processes was used as low cost biosorbent to remove methylene blue (MB) from aqueous solutions. The adsorption parameters including the initial pH value, dosage of biosorbents, contact time, and initial MB concentration were investigated to find the optimum adsorption conditions. The biosorbent obtained by microwave-hydrothermal treatment only for 3 min at 180 °C (microwave-hydrothermal treated grape peel, MGP) showed faster kinetics and higher adsorption capability than that produced by a conventional-hydrothermal process (hydrothermal treated grape peel, HGP) with a duration time of 16 h. The maximum adsorption capability of MGP under the optimum conditions (pH = 11, a dosage of 2.50 g/L) as determined with the Langmuir model reached 215.7 mg/g, which was among the best values achieved so far on biosorbents. These results demonstrated that the grape peel treated by a quick microwave-hydrothermal process can be a very promising low cost and efficient biosorbent for organic dye removal from aqueous solutions.Keywords:grape peel;biosorbent;biosorption;methylene blue;wastewater treatment
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MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 2
·1-10
·
IF 5.705
Wang Yao,Ma Ruiyang,Xiao Ruobai,Hao Lin,Wu Qiuhua,Wang Chun,Wang Zhi
A porous material (polytriphenylamine; PTPA) was synthesized by using triphenylamine as the monomer and dimethoxymethane as the cross-linker. PTPA was characterized by Fourier infrared spectrometry, X-ray diffraction measurements, scanning electron microscopy and N 2 adsorption-desorption isotherms. The PTPA has a spherical-shape morphology and relatively high specific surface area. It is shown to be a viable adsorbent for solid phase extraction of 3-chlorophenol, 2,3-dichlorophenol, 2,4-dichlorophenol and 2,4.6-trichlorophenol prior to their determination by high performance liquid chromatography-mass spectrometry. Under the optimized conditions, recoveries from spiked samples are in the range from 92.5% to 106.3%. The limits of detection range from 0.03 to 0.3 ng mL −1 (at an S/N ratio of 3) in case of bottled juice, and from 0.03 to 0.1 ng g −1 in case of tomato samples. The enrichment factors for the four analytes are in the range of 127–183 for bottle juice, and from 110–150 for tomatos. Response is linear in the range of 1.0 to 40.0 ng mL −1 for juice, and 0.3–40.0 ng g −1 for tomatos. The relative standard deviations for the determination of the chlorophenols at 20 ng mL −1 in bottled beverage, and 20 ng g −1 in tomatos are lower than 5.7%.
A polytriphenylamine polymer (PTPA) was prepared by using an external cross-linker method with triphenylamine as monomer and dimethoxymethane as cross-linker, and it was used as an adsorbent to extract chlorophenols from juice and vegetable samples.
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Journal of Cleaner Production
·
2018
·
IF 5.651
Li Cui,Jiugang Yuan,Ping Wang,Xingping Wang,Xuerong Fan,Qiang Wang
Phosphorylated wool with enhanced ability to absorb cationic dyes is helpful to dye wool fabrics using cationic dyes with good dyeing properties, which is more economic and ecofriendly compared to the traditional dyeing process of acid dyes with poor wet fastness. Phosphorylation can be performed by applying chemical reagents which tend to cause a problem of environmental pollution and the fibers can be damaged seriously under harsh reaction conditions, or using enzymes which are currently somewhat discouraged due to significant cost of the enzymes and their decreased stability at the reaction conditions. In this study, non-toxic glucose 6-phosphate was applied to phosphorylated modification of wool via Maillard reaction under a mild condition to enhance the dyeing properties of wool fabric for cationic dyes. The reaction between glucose 6-phosphate and wool keratin was demonstrated from the results of sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), particle diameter, Fourier transform infrared spectra (FTIR) and Energy Dispersive X-ray test (EDS). It was found that phosphorylation modification scarcely changed the mechanical properties of the wool fabric. Maillard browning on the wool could be avoided by accurately controlling the reaction time. Dyeing properties of phosphorylated wool fabric with cationic dyes were markedly enhanced. The exhaustion of phosphorylated wool fabric for two cationic dyes: Cationic Brilliant Red 5 GN and Brilliant Yellow B 6 GL increased from 38.6% to 18.9%–84.5% and 67% respectively by comparing with that of the wool fabric without modification and better color strength (K/S) and very good wash fastness properties obtained. The results indicated that phosphorylated modification of wool with glucose 6-phosphate could be a potential, safe and cleaner approach to develop a more efficient and economic dyeing process for wool fibers with cationic dyes.
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ADVANCES IN POLYMER TECHNOLOGY
·
2017
·Vol. 37
·期 7
·2561-2567
·
IF 1.291
Jikai Pei,Ziwei Wang,Jianguo Ren,Diansheng Liu
In this paper, an acrylic acid-rich wastewater from the production of propylene to acrolein was used to synthesize the polycarboxylate superplasticizers. First, the acrylic acid-rich wastewater was oxidized. Then, two kinds of unsaturated polyether macromonomers {methallyl polyethylene glycol (HPEG) and isoprenol polyethylene glycol (IPEG)} and the oxidized wastewater were copolymerized with it, respectively, by free radical polymerization in aqueous solution. The monomer conversion, molecular weight, molecular weight distribution of the copolymers of gel permeation chromatography (GPC) were characterized. The performance of the two copolymers was characterized by measuring paste flow, adsorption using GPC method, and the applied behavior of premixed concrete. The results showed that the synthesized copolymers could meet the requirement of application in contrast to the commodity product.
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危险品化学品经营许可证（带存储）