ENVIRONMENTAL MONITORING AND ASSESSMENT
·
2024
·Vol. 196
·期 12
·1152
·
IF 2.9
Alamgir Aamir,Fatima Noor
In the present study, piped water samples from Gulshan-e-Iqbal Town, Karachi, were evaluated for their Health Risk Assessment (HRA) and Water Quality Index (WQI). For this, different physicochemical and microbiological parameters were analyzed, and the results were evaluated according to the guidelines established by the WHO (2011) and the National Standards for Drinking Water Quality (NSDWQ) (2008). With the exception of sulphate, all physicochemical parameters were well within the guideline values. The mean concentrations of the metals in the samples were in the following order: Ca 2+ > Mg 2+ > Zn > Fe > Pb > Ni > Cr > As. More than 70% of the samples tested for Total Coliform Count (TCC), Total Faecal Coliform Count (TFC), Total Feacal Streptococci (TFS), and Total Aerobic Count (TAC) were feacal contaminated. E. coli was also isolated in almost 84.61% of the tested piped water samples. Results from the WQI revealed that 95.6% of samples had good physico-chemical characteristics, and 26% of the piped water samples had good microbiological quality. The WQI readings of all the samples for metals showed that they were unfit for human consumption. The mean Chronic Daily Intake (CDI) and Hazard Quotient (HQ) values, respectively, were in the following order: Zn > Fe > Pb > Ni > Cr > As, and Pb > As > Ni > Cr > Zn > Fe. All HQ values for As and Pb were greater than 1, and 50% of piped water samples had an HQ value for Ni that was greater than 1, indicating that people may suffer serious health issues as a result. All of the piped water samples except the area of block 13 D (S-5), had HQ values of less than 1 in relation to iron, but Zn HQ values of less than 1 indicated only mild health problems. Discharge of untreated sewage and cross-contamination are all potential sources of contamination that could result in diseases that are harmful to the public’s health. Water monitoring and management projects should be implemented in order to improve pipeline infrastructure and reduce sewage leakages.
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2021
·Vol. 65
·期 1
·115-123
·
IF 8.273
He Xian,Wu Dongbei,Shang Yinghui,Shen Hongdou,Xi Songyan,Wang Xia,Li Wenjun,Wang Qigang
Electrolyte regeneration is an important goal for environmental protection and sustainable development efforts. Herein, we report a facile strategy inspired by the transformation of edible dough from flour to regenerate hydrogel electrolytes from their dehydrated copolymer granules (CGs) via direct addition of water or salt solution. With the aid of heating, this procedure is efficient, relatively quick, and easily implemented. The dehydrated CGs are lightweight, reusable and stable under long-term storage. Even after 5 cycles of dehydration and regeneration, the regeneration efficiency of the hydrogel electrolytes, as evaluated based on retention of mechanical strength, is over 60%. The regenerated electrolytes possess considerable ionic conductivity, reprocessability, and 3D-printability. Furthermore, an all-gel supercapacitor assembled from the regenerated hydrogel electrolyte and activated carbon electrode with CGs as binder demonstrates excellent interfacial compatibility. The assembled all-gel supercapacitor can maintain 98.7% of its original specific capacitance after 100 bending tests, and can operate in a wide temperature range spanning from −15 to 60°C. This work may provide a new access to the development of renewable materials for various applications in the fields of intelligent devices, wearable electronics and soft robotics.
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2018
·Vol. 62
·期 3
·351-358
·
IF 4.318
Tang Yonghua,Zhou Peng,Chao Yuguang,Lin Fei,Lai Jianping,Li Hongxing,Guo Shaojun
Photocatalytic hydrogen production represents a promising strategy for clean, sustainable, and environmentfriendly energy supply. Up to now, great efforts have been devoted to designing the photocatalysts with noble metal as co-catalyst for visible-light-driven hydrogen evolution, while more efficient photocatalytic systems are still a major challenge. Herein, we report a facile strategy for synthesizing face-to-face ultrathin Pd nanosheets-amorphous carbon nitride (Pd NSs-ACN) structure with large contacting interface and short electronic transmission pathway, which can work as an efficient photocatalyst for hydrogen production. The synthesis starts with the growth of ultrathin Pd NSs, followed by assembly with the visible-light-response ACN through a simple stirring and annealing procedure. The resultant two dimensional face-to-face structures deliver an average hydrogen generation rate of 1.45 mmol h −1 g −1 at a temperature of 25°C, almost 2.6 times higher than that of Pd Nps-ACN with particle- to-face structural feature. The efficient photocatalytic activity is ascribed to the formation of high-density of active sites between ultrafine face-to-face contacted Pd NSs and the ACN, which cooperate more synergistically towards photocatalytic hydrogen production. The face-to-face engineered Pd NSs-ACN hybrids also offer a good stability revealed by photocatalytic hydrogen production measurements. The extraordinary performance highlights a powerful engineering model for designing other face-to-face contacting co-catalyst/photocatalysts, which will be a great impetus to optimize new catalytic transformations.
✓ 已验证
DOI
高影响因子
Frontiers of Materials Science
·
2026
·Vol. 20
·期 4
·260783
·
IF 2.3
Wang Siyu,Wang Yixin,Li Haojie,Zhao Kongyin,Kan Bohong
Hydrogel materials capable of loading and releasing functional proteins have attracted extensive attention. In this study, phycocyanin-loaded polyacrylamide/calcium alginate/calcium carbonate (PC@PAM/CaAlg/CaCO 3 ) composite hydrogel films were fabricated by combining a PAM/CaAlg polymer network with in-situ CaCO 3 mineralization. This mineralization strategy provided an additional structural approach for regulating film swelling and PC transport. The effects of the acrylamide/sodium alginate (AM/NaAlg) mass ratio and Na 2 CO 3 concentration on swelling and PC release in phosphate-buffered saline (PBS, pH 7.4) were investigated. The AM/NaAlg ratio of 4:1 resulted in relatively high swelling and PC release, whereas the PC diffusion was substantially restricted at 12:1. The film prepared at 8:1 and treated with 0.20 wt.% Na 2 CO 3 exhibited relatively high swelling and gradual, sustained PC release. This film showed antibacterial inhibition rates of 67.27% against S. aureus and 52.45% against E. coli , while ABTS and DPPH radical-scavenging efficiencies reached 98.29% and 79.68%, respectively.
✓ 已验证
DOI
高影响因子
PHARMACEUTICAL CHEMISTRY JOURNAL
·
2026
·Vol. 59
·期 12
·1400-1409
·
IF 0.8
Khalid Ramsha,Hilles Ayah R,Mawazi Saeid Mezail,Sofian Zarif Mohamed,Widodo Riyanto Teguh,Chik Zamri Bin,Hashim Najihah Binti Mohd,Mahmood Syed
The current study was aimed at developing a simple, sensitive, and rapid reverse-phase high-performance liquid chromatographic (HPLC) method for the quantification of felodipine and its lipid-based pharmaceutical formulations, e.g., liposomes. The drug sample (felodipine) was eluted isocratically using a mobile phase of 0.01 N phosphate buffer solution and acetonitrile at a ratio of 20:80 (v/v) on a Phenomenex C-18 (150 mm × 4.68 mm) analytical column. At a UV wavelength of 234 nm, the drug was quantitatively determined using a standard calibration curve spanning the range of 2–50 μg/mL. The results showed that the limits of quantitation and detection were 0.09 and 0.03 μg/mL respectively. For both the intra-day and inter-day analysis, relative standard deviation was found to be less than 2%, and the drug’s percentage accuracy was found to be within an acceptable range. As per the established protocols, the developed method was quantitatively assessed for its intended use in terms of specificity, linearity, accuracy, precision, robustness, and sensitivity analysis. Felodipine-loaded liposomes, which are lipid-based membrane-like cell structures, were effectively used to determine the drug entrapment efficiency using the currently validated RP-HPLC method.
✓ 已验证
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2026
·Vol. 33
·期 8
·2700-2713
·
IF 8.8
Yang Xueqing,Chen Zhibin,Ding Xiaolun,Jia Dongfang,Du Shiyao,Chowwanonthapunya Thee,Wu Dequan,Zhou Kun,Wang Jinke,Ma Lingwei,Zhang Dawei
This study addresses the corrosion and scaling issues of metallic materials in high-salinity environments. Three commonly used scale inhibitors and corrosion inhibitors—polyaspartic acid (PASP), polyepoxysuccinic acid (PESA), and hydroxyethylidene diphosphonic acid (HEDP)—were selected for multi-component formulations. High-throughput screening methods were employed to efficiently identify the optimal component ratios with the best synergistic effects for both scale and corrosion inhibition. The optimal ratios of ternary components of PASP: PESA: HEDP were found to be 1:1:2 and 2:1:1. The corrosion inhibition performance of the selected multi-component inhibitors was then systematically assessed using electrochemical impedance spectroscopy (EIS), and the results showed that the inhibition efficiency at the optimal concentration reached 89.1%. Additionally, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) were used to characterize the corrosion and scaling surfaces of the treated Q235 steel, as well as the crystal structure of the generated CaCO 3 precipitates. Further investigation of the mechanisms underlying both scale and corrosion inhibition enabled the development of a rapid and precise approach for assessing the performance of formulated inhibitor systems.
✓ 已验证
DOI
高影响因子
PHARMACEUTICAL RESEARCH
·
2026
·
IF 4.1
Che Xinyi,Gou Jingxin,Tang Xing,He Haibing
Objective Oral delivery of insulin is limited by enzymatic degradation and instability in the gastrointestinal tract, as well as inefficient intestinal absorption. This study aimed to develop a dual-barrier oral insulin delivery system to protect insulin during gastrointestinal transit. Methods A hierarchical formulation was constructed by integrating dextran-mediated insulin stabilization, solid lipid nanoparticle (SLN) encapsulation, enteric coating, and lyophilization. Insulin was first complexed with dextran and subsequently encapsulated into solid lipid nanoparticles (INS-SLNs) via a double-emulsion solvent evaporation method, followed by coating with Eudragit L100 (INS-SLNs-L100). The physicochemical properties, secondary structure, in vitro release and enzymatic stability, and in vivo hypoglycemic effects were evaluated. Results The optimized INS-SLNs and INS-SLNs-L100 exhibited particle sizes of 221.2 ± 3.2 nm and 288.2 ± 1.1 nm, respectively, with encapsulation efficiencies exceeding 85%. The secondary structure of insulin was largely preserved after formulation and lyophilization. Both formulations improved the resistance of insulin to enzymatic degradation. The L100-coated formulation further enhanced insulin protection under simulated gastric conditions while maintaining efficient release under intestinal conditions. In streptozotocin-induced diabetic rats, oral administration resulted in relative pharmacological availability (rPA) values of 5.69% and 7.66% for INS-SLNs and INS-SLNs-L100, respectively, compared with 1.1% for oral insulin solution. Conclusion The developed dual-barrier oral insulin delivery system provided enhanced gastrointestinal protection and sustained hypoglycemic effects after oral administration, supporting its potential as a formulation strategy for oral delivery of insulin and other peptide therapeutics.
✓ 已验证
DOI
高影响因子
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
·
2026
·
IF 3.1
Zhou YinSong,Feng Shuyun,An Qiang,Du Yu,Guan Hao,Ye Qiqing,Zeng Yuxue,Wang Lingxin
Conventional approaches to azo dye wastewater treatment face challenges including poor recyclability of powdered biochar (BC), low mechanical strength of chitosan (CS), and limited efficiency of radical-dominated pathways. To address these issues, we developed novel biochar–chitosan composite microspheres (CSBC) via a green sol–gel method. The CSBC catalyst achieved 92.02% methyl orange (MO) removal within 60 min, with a pseudo-first-order kinetic constant of 3.720 h −1 , which is 1.71- and 2.46-fold higher than those of BC and CS alone, respectively. Mechanistic studies, including quenching experiments and electron paramagnetic resonance (EPR) analysis, revealed a dominant non-radical pathway primarily mediated by singlet oxygen ( 1 O 2 ), with superoxide radicals (O 2 ·− ) serving as critical intermediates, while contributions from ·OH and SO 4 ·− were minor. In a continuous-flow fixed-bed system (3 mL min −1 , 0.5 cm bed height), the catalyst maintained 86.78% MO removal efficiency. After five consecutive cycles, it retained 77.80% of its initial activity. Thus, CSBC microspheres represent a promising metal-free, non-radical persulfate activation system for efficient dye wastewater remediation.
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2026
·
IF 4.9
Wang Jianfeng,Wang Zhijun,Geng Jingting,Zhu Yong
Sulfamethoxazole (SMX) is poorly removed by conventional biological treatment, highlighting the need for more effective treatment strategies. In this study, a ball-milled biochar-supported zero-valent iron composite (BC-ZVI) was evaluated as an activator of peroxymonosulfate (PMS) for SMX degradation. Among BC mass ratios of 1:2, 1:5, 1:10, and 1:20, the 1:10 composite exhibited the highest catalytic performance. Under the baseline conditions, 98.0% of SMX was removed within 60 min, with an observed pseudo-first-order rate constant ( k obs ) of 0.0628 min −1 , which was 3.69 times higher than that of the ZVI/PMS system. Arrhenius analysis over 15–35 °C yielded an apparent activation energy of 47.5 kJ mol −1 (R 2 = 0.982), whereas k obs decreased by approximately 30-fold as the initial pH increased from 3 to 9, indicating strong pH dependence. Quenching experiments, electron paramagnetic resonance analysis, and solvent-isotope tests collectively indicated the coexistence of radical-mediated and 1 O 2 -associated pathways. Five major transformation-product ions were identified, and a TOC removal of 62.7% indicated that SMX degradation was accompanied by only partial mineralization. The SMX removal efficiency decreased to approximately 69.0% after five reuse cycles, while dissolved-iron release measured during the first cycle suggested incomplete stabilization of the iron phase within the composite. Overall, ball milling promoted the formation of an effective biochar–iron interface for PMS activation and substantially enhanced SMX degradation, although strong acid dependence, matrix inhibition, catalyst deactivation, and iron release remain important limitations for application in complex aqueous systems.
✓ 已验证
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Shan Lutong,Li Fulong,Wang Zixuan,Xing Zhenyue,Guo Shan,Chen Tsung-Yi,Huang Wei-Hsiang,Shi Xiaodong,Tian Xinlong,Zhu Guanzhou
Quasi-solid electrolytes can mitigate polyiodide shuttling and suppress parasitic reactions at zinc negative electrode in zinc-iodine batteries by reducing free water, but their limited liquid content often results in sluggish interfacial charge transfer. Here we show liquid-electrolyte-wetted quasi-solid electrolytes by combining single-atom-modified zeolites (single-atom = iron, cobalt, nickel, and copper) with zinc sulfate aqueous solution for high-rate zinc-iodine batteries. Theoretical calculations, in situ spectroscopy, and laser confocal microscopy reveal that the single-atom metal sites enhance iodine conversion kinetics and suppress polyiodide shuttling through a synergistic catalytic-adsorption effect, with iron-doped zeolite exhibiting the strongest performance. Iron-doped zeolite further stabilizes water molecules, suppresses side reactions, and promotes uniform zinc deposition. The iron-doped zeolite-assembled zinc-iodine batteries maintain a discharge capacity of 81.2 mAh g −1 (based on iodine mass) after 6,800 cycles at 4 A g −1 , while proof-of-concept pouch cells exhibit a capacity of 147.6 mAh g −1 (based on iodine mass) or 52 mAh g −1 (based on total positive electrode mass) after 200 cycles at 0.5 A g −1 . Lastly, iron-doped zeolite also demonstrates compatibility with other positive electrode materials for rechargeable zinc batteries.
✓ 已验证
DOI
高影响因子
CHEMICAL PAPERS
·
2026
·
IF 2.7
Hu Shuang-Lan,Gao Xi-Zhe,Cheng Hao,Zhang Ping-Jun
A carbon-based metal-functionalized catalyst (PAA-M) supported on sodium polyacrylate (PAA-Na) was developed for the esterification of neopentyl glycol with acetic acid to produce neopentyl glycol monoacetate and diacetate. Using an ion-crosslinking/carbonization strategy, Sn 4+ , Zr 4+ , Al 3+ , and Fe 3+ ions not only served as catalytic metal centers but also modified the evolution of the polyacrylate network during pyrolysis, generating metal-containing carbon composites with distinct surface acidity, thermal stability, and hierarchical pore structures. The results demonstrate that product distribution was governed by the coupled effects of metal species, acid-site density and strength, pore structure, and mass transfer, rather than by Lewis acidity alone. Under an acid/alcohol molar ratio of 3:1 at 110 °C, Sn-PAA and Zr-PAA provided relatively high activity and favored diester formation, with diester selectivities of 67% and 66%, respectively. In contrast, Al-PAA and Fe-PAA promoted monoester accumulation, showing diester selectivities of only 57–58%. Sn-PAA exhibited a controllable monoester- production window, with the monoester yield reaching 46–49% within 0.5–2 h before further conversion to diester. Zr-PAA maintained nearly constant conversion and product distribution over five reuse cycles, while Sn-PAA showed only a minor decrease in conversion from 80.0 to 78.7%. These findings establish a structure-performance relationship for PAA-derived metal–carbon catalysts and demonstrate that the catalyst composition and carbonized network can be used to regulate the monoester/diester distribution in polyol esterification.
✓ 已验证
DOI
高影响因子
EUROPEAN PHYSICAL JOURNAL C
·
2025
·Vol. 85
·期 12
·1373
·
IF 4.8
Bandiera L.,Cai R.,Carsi S.,Cesare S.,Dewhurst K. A.,D’Andrea M.,Salvador D. De,Gandini P.,Guidi V.,Hermes P.,Lezzani G.,Malagutti L.,Marangotto D.,Maccani C.,Mazzolari A.,Merli A.,Mirarchi D.,Monti-Guarnieri P.,Montanari C. E.,Negrello R.,Neri N.,Prest M.,Redaelli S.,Romagnoni M.,Selmi A.,Tonani G.,Vallazza E.,Veres D.,Zangari F.,Zielińska M.
This study investigates the performance of bent silicon crystals intended to channel hadrons in a fixed-target experiment at the Large Hadron Collider (LHC). The phenomenon of planar channelling in bent crystals enables extremely high effective bending fields for positively charged hadrons within compact volumes. Particles trapped in the potential well of high-purity, ordered atomic lattices follow the mechanical curvature of the crystal, resulting in macroscopic deflections. Although the bend angle remains constant across different momenta (i.e., the phenomenon is non-dispersive), the channelling acceptance and efficiency still depend on the particle momentum. Crystals with lengths in the range of 5 to 10 cm, bent to angles between 5 and 15 mrad, are under consideration for measurements of the electric and magnetic dipole moments of short-lived charmed baryons, such as the \(\varLambda _c^+\) . Such large deflection angles over short distances cannot be achieved using conventional magnets. The principle of inducing spin precession through bent crystals for magnetic dipole moment measurements was first demonstrated experimentally in the 1990s. Building on this concept, experimental layouts are now being explored for implementation at the LHC. The feasibility of such measurements depends, among other factors, on the availability of crystals that exhibit the required mechanical properties to reach the necessary channelling performance. To address this, a dedicated machine experiment – TWOCRYST – has been installed in the LHC to carry out beam tests in the TeV energy range. The bent crystals for TWOCRYST were fabricated and tested using both X-ray diffraction and high-momentum hadron beams at 180 GeV/c at the CERN Super Proton Synchrotron (SPS) extraction lines. Two crystals based on established technologies were included in this test. In addition, a crystal bent via anodic bonding was tested for the first time with high-energy hadrons to assess its potential for future accelerator applications. This paper presents an analysis of the performance of the three tested crystals and, where possible, outlines key differences in their properties attributed to the respective bending techniques.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）