JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Gongduan Fan,Rongsheng Ning,Zhongsen Yan,Jing Luo,Banghao Du,Jiajun Zhan,Lingshan Liu,Jin Zhang
Antibiotic contamination is increasing scrutinized recently. In this work, the Ag−AgCl/WO 3 /g-C 3 N 4 (AWC) nanocomposites were successfully synthesized using a two-step process involving electrostatic self-assembly and in-situ deposition for trimethoprim (TMP) degradation. The as-prepared photocatalysts were investigated and characterized by XRD, FTIR, XPS, TGA, SEM, TEM , UV–vis, PL and EIS. The experimental results indicated that 99.9% of TMP (4 mg/L) was degraded within 60 min when the concentration of AWC was 0.5 g/L. Reactive species scavenging experiments and electron spin resonance (ESR) experiments illustrated that superoxide radical (•O 2 − ) and photogenerated holes (h + ) were the main active species. The functional theory calculation and identification of intermediates via HPLC-MS revealed the possible degradation pathways of TMP. A double photoelectron-transfer mechanism in AWC photocatalyst was proposed. Five cycling photocatalytic tests and reactions under different solution matrix effects further supported that the AWC was a promising photocatalyst for the removal of TMP from the aquatic environment.
研究领域:
环境科学
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材料科学
·
生物学
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DOI
PubMed
高影响因子
WATER RESEARCH
·
2023
·
IF 12.8
Hesong Wang,Zhangjie Yu,Mengzhe Liao,Chuandong Wu,Jiaxuan Yang,Jing Zhao,Jinlong Wang,Langming Bai,Guibai Li,Heng Liang
Scientists have been focusing on applying more natural processes instead of industrial chemicals in drinking water treatment to achieve the purpose of carbon emissions reduction. In this study, we shortened the infiltration range of riverbank filtration, a natural water purification process, to form the short-distance riverbank filtration (sRBF) which retained its ability in water quality improvement and barely influenced the groundwater environment, and integrated it with ultrafiltration (UF) to form a one-step sRBF-UF system. This naturalness-artificiality combination could realize stable contaminants removal and trans-membrane pressure (TMP) increase relief for over 30 days without dosing chemicals. Generally, both sRBF and UF played the important role in river water purification, and the interaction between them made the one-step sRBF-UF superior in long-term operation. The sRBF could efficiently remove contaminants (90 % turbidity, 60 % total nitrogen, 30 % ammonia nitrogen, and 25 % total organic carbon) and reduce the membrane fouling potential of river water under its optimum operation conditions, i.e., a hydraulic retention time of 48 h, an operation temperature of 20 °C, and a synergistic filter material of aquifer and riverbank soil. Synergistic adsorption, interception, and microbial biodegradation were proved to be the mechanisms of contaminants and foulants removal for sRBF. The sequential UF also participated in the reduction of impurities and especially played a role in intercepting microbial metabolism products and possibly leaked microorganisms from sRBF, assuring the safety of product water. To date, the one-step sRBF-UF was a new attempt to combine a natural process with an artificial one, and realized a good and stable product quality in long-term operation without doing industrial chemicals, which made it a promised alternative for water purification for cities alongside the river.
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DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Yang Yang,Jinning Wang,Mei Chen,Nan Li,Jiaguo Yan,Xin Wang
An electroactive dynamic membrane (EADM), which enabled simultaneous solid-liquid separation and contaminants removal, has been developed by electrostimulation using domestic wastewater as inoculum. Results showed that both the control dynamic membrane (CDM), without electrical stimulation, and the EADM systems exhibited stable removal performance with chemical oxygen demand (COD), and a robustness in responding to a fluctuating organic load. With the introduction of a weak electrical field, the EADM transmembrane pressure (TMP) was significantly reduced (0.02 kPa/d) compared with the control (0.20 kPa/d). In the treatment of methyl orange (MO), the EADM system achieved a decolorization efficiency of 85.87 %, much higher than the control dynamic membrane (CDM) system (58.84 %), which can be attributed to electrical stimulation and H 2 production on cathode. Microbial analysis has established that electrostimulation enriched the electroactive bacteria in the dynamic biofilm, and shaped the microbial structure, with improved contaminant removal. The results of this study highlight the potential of regulating the microbial community and creating a beneficial biofilm as a dynamic layer to facilitate contaminant removal.
研究领域:
环境工程
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水处理
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微生物学
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电化学
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产品关联
DOI
PubMed
高影响因子
BRITISH JOURNAL OF NUTRITION
·
2026
·
IF 3.1
Xin Yu,Renzhi Liu,Futao Jing,Zhengxu Chen,Mingxiang Lu,Yaobing Li,Luqing Pan
Dietary plant-derived bioactive compounds for enhancing physiological health are becoming a prevalent strategy for antibiotic alternatives. Our study revealed the effects and underlying mechanism of Osthole (OST) and OST-Tetramethylpyrazine (TMP) compound in Litopenaeus vannamei based on network pharmacology, molecular docking and a 42-day feeding trial verification. The results illustrated that OST and OST-TMP compound significantly improved the survival rate (SR), weight gain rate (WGR), specific growth rate (SGR) and feed conversion ratio (FCR), strengthening the growth performance of L. vannamei. Meanwhile, combining the predictive results from network pharmacology and molecular docking, we propose that OST and TMP synergistically enhance the antioxidant defense capacity of shrimp through the synergistic Nrf2 signaling pathway, thereby enhancing the expression of total antioxidant capacity (T-AOC), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx). Furthermore, OST-TMP exhibited a significant increase of the immune response in hemocyte and intestine of shrimp, increasing the expression of antimicrobial peptide and lysozyme, and suppressing the inflammatory factors, via the synergistic (NF-κB) and complementary targets predicted by network pharmacology. Additionally, gut microbiota composition of L. vannamei was improved, and the dominant genera were correlated with intestinal immune in the compound groups. For the first time, we elucidated the mechanism of plant-derived bioactive compounds mediating physiological health in aquatic animals via a new strategy of network pharmacology-molecular docking-experimental verification, and identified the optimal addition amount of OST-TMP in shrimp (150 mg/kg TMP + 20 mg/kg OST), providing a technical safeguard for the animal health and the safety of aquatic products.
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DOI
PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2024
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IF 3.7
Qian Mao,Changliu He,Biqiang Chen,Xu Zhang
Biolubricants produced by chemically modifying vegetable oils are promising to replace mineral-based lubricants. However, the performances of biolubricants synthesized through traditional chemical modification routes, such as transesterification/esterification, epoxidation with further ring opening, and estolide formation, cannot satisfy the demands of extreme conditions. Meanwhile, complicated multi-step reactions cause expensive costs, which hinders their large-scale application. In this study, pelargonic acid (PA) derived from the cleavage of oleic acid was esterified with trimethylolpropane (TMP) to produce branched-chain esters (tri-TMP esters) catalyzed by the lipase ( Candida sp. 99–125 ), focusing on batch stability of the lipase, thermal-oxidation stability and lubrication performance of the product. The lipase maintained high activity for 4 continuous batches in 5 L enzyme reactor with the conversion of PA > 96% and the accumulation of tri-TMP esters > 84% in each batch. The obtained tri-TMP esters had a pour point of − 56 °C, a viscosity index of 137, and a flash point of 276 °C. Anti-oxidation stability test and thermogravimetric behaviors showed that the biolubricant had favorable thermal-oxidative stability. Friction tests verified that the product displayed excellent lubrication performance with a minimum coefficient of friction (COF) of 0.099 and an average wear spot diameter (WSD) of 221.5 µm. The green and high-selective synthetic pathway fills the defect of existing routes for the preparation of biolubricants from chemically modified vegetable oils.
研究领域:
生物化学
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材料科学
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绿色化学
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DOI
高影响因子
Bioactive Materials
·
2024
·
IF 18
Hao Zhou,Jinpeng He,Renfeng Liu,Jun Cheng,Yuhao Yuan,Wanpu Mao,Jun Zhou,Honghui He,Qianqi Liu,Wei Tan,Cijun Shuai,Youwen Deng
Intervertebral disc degeneration (IVDD) can be caused by aging, injury, and genetic factors. The pathological changes associated with IVDD include the excessive accumulation of reactive oxygen species (ROS), cellular pyroptosis, and extracellular matrix (ECM) degradation. There are currently no approved specific molecular therapies for IVDD. In this study, we developed a multifunctional and microenvironment-responsive metal-phenolic network release platform, termed TMP@Alg-PBA/PVA, which could treat (IL-1β)-induced IVDD. The metal-phenolic network (TA-Mn-PVP, TMP) released from this platform targeted mitochondria to efficiently scavenge ROS and reduce ECM degradation. Pyroptosis was suppressed through the inhibition of the IL-17/ERK signaling pathway. These findings demonstrate the versatility of the platform. And in a rat model of IVDD, TMP@Alg-PBA/PVA exhibited excellent therapeutic effects by reducing the progression of the disease. TMP@Alg-PBA/PVA, therefore, presents clinical potential for the treatment of IVDD.
研究领域:
生物医学工程
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组织工程
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骨科
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药理学
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DOI
PubMed
高影响因子
Environmental Science-Water Research & Technology
·
2021
·Vol. 7
·期 11
·2021-2032
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IF 4.251
K. M. Wang,L. J. Zhang,H. L. Zhang,J. L. Li,Y. C. Zhang,B. C. Liu,H. Y. Wang
In this study, a novel gas sparging regime was applied, in which filtration was conducted without gas sparging to create a pseudo dead-end (DE) filtration cycle followed by membrane relaxation/backwashing for a short period of time with gas sparging until the TMP set-point was achieved. Compared with conventional continuous filtration and continuous gas sparging (CGS) modes and temporal pseudo DE filtration modes, this pseudo DE filtration coupled with TMP set-point control mode can achieve lower energy demand with sustainable membrane operation. The impacts of the TMP set-point value, imposed flux and physical cleaning process (membrane relaxation/backwash coupled with gas sparging) were evaluated. The result indicated that a moderate TMP set-point value (10–12 kPa) should be selected. Backwashing can significantly reduce the irreversible fouling and enhance the net permeate flux. However, when the TMP set-point value was higher (TMPset = 14 kPa), severe cake layer consolidation occurred and no appreciable improvement of fouling control was observed even with backwashing coupled with gas sparging. The optimum condition can be established when the TMP set-point value was 12 kPa at a flux of 15 L m−2 h−1 in terms of a higher net flux and lower specific energy demand. Importantly, sustainable membrane operation can be achieved under pseudo DE filtration coupled with TMP set-point control mode with a low energy demand (0.09 kWh m−3) and low operational cost ($0.027 per m3), promoting energy neutral municipal wastewater treatment to be realized.
研究领域:
环境工程
·
污水处理
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
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2021
·Vol. 39
·期 9
·1161-1168
·
IF 3.603
Gao Dan-Ni,Zhao Yu-Lai,Cai Jing-Yu,Hou Lin-Xi,Xiao Long-Qiang
Reversible chain transfer catalyzed polymerization (RTCP) is a practical and efficient process for the precise synthesis of polymers with special architecture by using simple phenols (2,4,6-trimethylphenol, TMP) or hydrocarbons (xanthene, XT) as efficient organocatalysts. Herein, alkyl iodide (R-I), which was generated from in situ bromine-iodine transformation of alkyl bromide (R-Br) with sodium iodide (NaI), was served as initiator to mediate RTCP with TMP or XT. MMA and other functional methacrylates, including GMA, DEAM, DMAEMA and BzMA, were successfully initiated by combining organocatalysts and azo initiators to yield polymers with low-polydispersity ( M w / M n =1.1–1.5) and ideal monomer conversions (50%–90%) at moderate temperature. Moreover, 3-armstar polymers were also obtained by this method. The high chain-end fidelity of the obtained poly(methyl methacrylate) with iodine as chain-end group (PMMA-I) was confirmed by chain-extension reaction. The environmentally friendly initiators and organocatalysts exhibit powerful polymerization properties toward RTCP, providing a significant method to synthesize functional polymers.
研究领域:
高分子化学
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材料科学
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有机化学
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DOI
高影响因子
DESALINATION
·
2022
·
IF 11.211
Hui Wen,Wei Huang,Changkun Liu
In this paper, a novel FO membrane with antibacterial and antifouling properties was prepared for the first time by forming a multifunctional negatively-charged active layer via the surface amidation reaction with two antibacterial agents, namely, sulfamethoxazole (SMX) and trimethoprim (TMP). The membranes modified by SMX and TMP showed superior water flux , the highest reaching 31.86 (±1.2) LMH for M-T-2, and a lower reverse salt flux (7.74 gMH), which significantly improved the FO performance. In addition, the SMX and TMP immobilized on the FO membrane formed an electrostatic repulsive force towards the negatively-charged bacteria, and showed the inherent destruction capabilities for bacteria when in contact, constructing a double barrier for the fouling of bacteria. As an example, M-T-2 membrane showed good anti-bacteria performance (OD value of 0.058) in the actual municipal sludge wastewater, meanwhile maintaining good water permeability (88% of the initial flux). Furthermore, the prepared membrane owned suitable antifouling and antibacterial ability in the negatively-charged dye wastewater, achieving the efficient removal of more than 95.5% of the dyes. These results show that the modification of the active layer with antibacterial agents can significantly improve the application prospect of FO membranes.
研究领域:
环境工程
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水处理
·
膜科学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2015
·Vol. 23
·期 7
·6826-6835
·
IF 2.828
Li Jianan,Cheng Weixiao,Xu Like,Jiao Yanan,Baig Shams Ali,Chen Hong
In this study, the occurrence of 8 antibiotics [3 tetracyclines (TCs), 4 sulfonamides, and 1 trimethoprim (TMP)], 12 antibiotic resistance genes (ARGs) (10 tet , 2 sul ), 4 types of bacteria [no antibiotics, anti-TC, anti-sulfamethoxazole (SMX), and anti-double], and intI 1 in two wastewater treatment plants (WWTPs) were assessed and their influences in downstream lake were investigated. Both WWTPs’ effluent demonstrated some similarities, but the abundance and removal rate varied significantly. Results revealed that biological treatment mainly removed antibiotics and ARGs, whereas physical techniques were found to eliminate antibiotic resistance bacteria (ARBs) abundance (about 1 log for each one). UV disinfection did not significantly enhance the removal efficiency, and the release of the abundantly available target contaminants from the excess sludge may pose threats to human and the environment. Different antibiotics showed diverse influences on the downstream lake, and the concentrations of sulfamethazine (SM2) and SMX were observed to increase enormously. The total ARG abundance ascended about 0.1 log and some ARGs (e.g., tet C, intI 1, tet A) increased due to the high input of the effluent. In addition, the abundance of ARB variation in the lake also changed, but the abundance of four types of bacteria remained stable in the downstream sampling sites.
研究领域:
环境科学
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微生物学
·
水处理工程
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产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Jiantao Zhu,Zhimin Wu,Di Xiong,Langsheng Pan,Yuejin Liu
A novel linear and cross-linked network polyurethane dispersion (LWPUD and CWPUD) being blue transparent, low acid number and low crystallinity were prepared using the pre-polymerization and chain-extending reaction synthetic method. The properties of LWPUD and LWPUF(linear WPU film) with different 2,2-dimethylolpropionic acid (DMPA) contents were examined by fourier transform infrared spectroscopy (FT-IR), transmission electron microscope (TEM) and dynamic light scattering technique (DLS), X-ray diffractometer (XRD), differential scanning calorimeter (DSC) and thermal gravimetric analyzer (TGA). The particle size of CWPUD, the water resistance and the mechanical property of cross-linked WPU film (CWPUF) with different TMP contents were investigated. The results showed that with increasing DMPA content in polyurethane chain, the particles of LWPUD became more uniform and regular, and the glass transition temperature of LWPUF decreased, while its thermal stability increased. With increasing the TMP content in polyurethane chain, the particle size of CWPUD and the water resistance and the tensile strength of CWPUF increased, while the elongation at break of CWPUF decreased. By adding water-based colorant, wetting agent, adhesion promoter and deionized water into LWPUD and CWPUD, a novel water-based ink with low crystallinity was obtained. The adhesion, water resistance and anti-adhesion of the cross-linked network water-based ink were better than those of the linear water-based ink in application on polyethylene terephthalate (PET) substrate.
研究领域:
聚合物科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 38
·2503713
·
IF 19
Caiyan Shen,Dichang Guan,Wenchao Liu,Yanbing Cao,Zhongdong Peng,Yu Ren,Litao Kang,Jinhao Meng,Zhichen Xue,Ke Du
The development of fluorine-free electrolytes offers a promising route for more environmentally sustainable lithium-ion batteries (LIBs). However, the low solubility of fluorine-free lithium salts in conventional carbonate solvents limits this progress. Additionally, while strongly coordinating solvents enhance salt dissolution, their use can lead to co-intercalation in graphite, complicating electrolyte design. Herein, lithium bis(oxalate)borate (LiBOB) is chosen as lithium salt, and a synergistic electrolyte design strategy is employed, combining a strongly coordinating solvent (tris(2-methylpropyl) phosphine oxide, TMP) and weakly coordinating solvent (dimethyl carbonate, DMC). This approach enables the use of fluorine-free lithium salts while ensuring compatibility with graphite by modulating the primary coordination shell. Furthermore, this solvation structure enables the formation of an inorganic-dominated cathode electrolyte interphase (CEI) on the LiMn 2 O 4 (LMO) and a solid electrolyte interphase (SEI) on the graphite, improving lithium-ion conductivity and overall electrochemical performance. Additionally, compared to lithium hexafluorophosphate (LiPF 6 ), fluorine-free lithium salt minimized the formation of HF by-products, suppressing transition metals (TMs) dissolution. As a result, 1 Ah LMO||graphite pouch cell with fluorine-free electrolyte retains 92.8% of its capacity after 200 cycles, demonstrating excellent cycling stability and delivering high-rate capacity of 0.8486 Ah at 2 C, compared to 84.8% retention and 0.652 Ah with the conventional electrolyte.
研究领域:
电化学
·
能源材料
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电池技术
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可持续化学
·
材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）