JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
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2024
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IF 3.1
Qinyuan Qu,Wengang Liu,Wang Zheng,Benjamin Chetelat,Qingchuan Liu,Jiubin Chen
The geological and environmental applications of tin (Sn) isotopes have been hindered by the shortcomings of chemical purification, as severe loss of Sn would occur during sample preparation (evaporation and re-dissolution) and column separation, triggering isotope measurement bias. In this study, we develop a novel and robust separation method to purify Sn from natural samples for accurate isotope measurements. The protocol is established by combining two chromatographic columns loaded with AG 1-X8 and AG 50W-X12 resins, and optimizing the sample evaporation and re-dissolution procedures. The method is proven to efficiently eliminate the main interferents such as Ag, Zn, Mo, Cd and Sb and results in low procedural blank (0.54 ± 0.21 ng, n = 3), quantitative recovery (95–102%, n = 32) and good external precision (δ120Sn of 0.02–0.04‰, in 55 measurements) for isotope measurement. The protocol is further applied to seven geological and environmental reference materials (BCR-2, BHVO-2, AGV-2, JG-2, AC-E, PACs-2 and GSS 7) and new values are reported for both odd (δ119Sn and δ117Sn) and even (δ120Sn and δ122Sn) Sn isotope ratios. This study demonstrates clearly the potential application of our method for studying the geochemical behaviors of Sn and its isotopes in various aspects.
研究领域:
地球化学
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分析化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Tingxiang He,Xiang Liu,Shenghua Lv,Dequan Wei,Leipeng Liu
The abuse of antibiotics led to significant environmental pollution through persistent residues in water bodies, posing severe risks to both ecological systems and human health. Addressing this issue, recent studies highlighted the potential of carbonaceous materials as effective adsorbents for removing antibiotics from water. Despite the proven potential of various carbonaceous materials in water purification, the application of three-dimensional porous microspherical aerogels as adsorbents presented a promising yet comparatively less discussed avenue in the quest for efficient antibiotic removal from aquatic environments.This work introduced a novel KGM-GO/CS/SA composite aerogel sphere, developed via a simple sol–gel and dripping method, using konjac glucomannan (KGM) as a cross-linking agent. We extensively analyzed its adsorption efficiency against common antibiotics such as tetracycline (TC), ofloxacin (OFL), and sulfadiazine (SDZ), revealing its rapid adsorption kinetics and high capacity. The aerogel's micro-morphology, characterized by a graded porous structure with abundant microporous channels and a low bulk density of 21.2 mg/cm3, along with its enhanced mechanical properties and thermal stability due to KGM cross-linking, signified its potential as a robust adsorbent. The surface functional groups facilitated diverse interaction mechanisms, including electrostatic attraction, hydrogen bonding, and π-π interactions, contributing to the adsorbent's high performance. Furthermore, the surface charge of the aerogel varied with pH, enhancing its electrostatic adsorption capabilities. The adsorption behavior was best described by the quasi-second-order and Langmuir models, with maximum capacities of 427.63 mg/g for OFL, 374.35 mg/g for TC, and 231.09 mg/g for SDZ, thereby offering a promising solution for antibiotic pollution remediation and illustrating the utility of carbon-based aerogel microspheres in environmental applications.
研究领域:
材料科学
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环境科学
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生物医学工程
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Jiahui Wen,Na Huang,Zixuan Wei,Danyang Yi,Yijuan Long,Huzhi Zheng
Pyrophosphate (P 2 O 7 4− , PPi) plays a vital role in ecological environment. Its elevated levels in water bodies can lead to eutrophication. Hence, its detection is extremely significant. Whereas most of the existing methods for the actual detection of PPi may cause environmental pollution or suffer from operational complexity. In this study, we introduced a sensitive and selective method for detecting PPi based on the fact that PPi can inhibit the peroxidase-like activity of adenosine 5′-triphosphate (ATP). This strategy not only eliminated the complexity of material preparation (ATP is commercialized), but also addressed the general need for metal ions in detecting PPi. The dynamic range of PPi detection was 1.0–200 μM and the detection limit was 74 nM. In addition, this strategy had been successfully applied to the determination of PPi in tap water and lake water. This work extends the application of natural biological small molecule ATP in the analysis and provides an innovative thought for the metal-free detection of PPi.
研究领域:
分析化学
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环境科学
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生物化学
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DOI
高影响因子
Journal of Water Process Engineering
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2024
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IF 6.3
Chao Lei,Mingli Ye,Jun Tang,Cun Yu,Sha Yu
In this study, the performance of an efficient magnetic core-shell heterostructure, CuFe 2 O 4 /CuS (referred to as CFOCS), was assessed for the disintegration of amoxicillin (AMOX) under simulated sunlight irradiation in the presence of peroxymonosulfate (PMS). The Characterization analyses demonstrated the successful construction of the CFOCS magnetic core-shell. Comparative studies demonstrated the superior performance of the CFOCS/PMS/xenon ternary system compared to binary and individual processes, with a synergy index (SI) of 1.21. The purification experiments illustrated that complete removal of the AMOX antibiotic was achieved under optimized conditions, including a pH of 7.0, PMS dosage of 2 mM, CFOCS quantity of 0.5 g L −1 , and AMOX concentrations of 10 and 20 mg L −1 . To elucidate the charge carrier migration pathway, a type II heterojunction model was proposed, supported by radical scavenging experiments, UV–Vis DRS, electrochemical impedance spectroscopy (EIS), and Mott-Schottky (M-S) analyses. The mechanistic investigation revealed the dual activity of PMS, which can be activated both in the aqueous solution under xenon light and on the catalyst surface through Cu (I) and Cu (II) centers. A key aspect of this study was a comprehensive aquatic hazard assessment of amoxicillin (AMX) in both treated and untreated aqueous solutions, utilizing the hazard quotient (HQ) method. Eventually, the investigated ternary system demonstrated remarkable efficiency in AMX degradation across various water systems, including lake water, tap water, and deionized water (DIW). Notably, the system maintained exceptional stability in all tested water bodies, underscoring the practical applicability of CFOCS catalyst in real-world scenarios.
研究领域:
环境科学
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化学工程
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药学
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产品关联
DOI
高影响因子
Environmental Chemistry and Ecotoxicology
·
2025
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IF 8.2
Shuangxi Zhou,Huiming Qi,Mingchao Zhang,Ayiguli Maimaiti,Zuozheng Ma,Hao Wu,Deyan Li,Wei Wang
Non recyclability of carbon nanotube materials (CNTs) has restrained their application in environmental field. Compared to chemical deposition，the ball-milling was a simple and cost-effective method to prepare magnetic CNTs for water treatment application. Various magnetic CNTs were prepared with different CNTs (outer diameters of 4–8 nm (CNT4) and 8–15 nm (CNT8)) and nano-Fe 3 O 4 for carbamazepine (CBZ) removal from water. Prepared materials were characterized by various surface analyzing methods. Adsorption kinetics and isotherms, the effect of solution pH, co-existing ions, humic acid on CBZ adsorption, and regeneration experiments were carried out. According to the Langmuir model, the maximum adsorption capacity of prepared MCNT4–5 (177.80 mg/g) was similar to CNT4 (174.62 mg/g), and an obvious enhancement of MCNT8–7 (81.87 mg/g) compared to CNT8 (54.60 mg/g). Notably, introducing nano-Fe 3 O 4 (low capacity for CBZ) caused the mass loss of adsorbents (CNTs), which might be compensated by the ball-milling process, increasing the proportion of micro- or meso- pores of prepared magnetic CNTs. Meanwhile, the treatment of ball-milling (CNTs and nano-Fe 3 O 4 ) lead to more O-structure and aromatic structure exposed on the surface of magnetic materials, thus promoting the adsorption capacity of MCNT4–5 as evidenced by XPS spectrum. Furthermore, MCNT4–5 showed excellent reusability with stable removal percentage (> 86 %) within 10 cycles. Results indicate that ball-milling is a processing technique to achieve high recyclability, environmental friendliness, and cost-effectiveness materials, which is expected to enhance the application of nanomaterials in water purification field.
研究领域:
环境科学
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材料科学
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水处理
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纳米技术
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2017
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IF 3.648
Qiang Huang,Yuxin Chen,Meiying Liu,Jinjin Liu,Jiawei Wang,Kelun Zhou,Hongfang Li,Yanyun Deng,Xiaoyong Zhang,Yen Wei
In this report, a novel strategy that combination of mussel-inspired chemistry and surface-initiated redox polymerization has been developed for preparation of carboxyl groups modified SiO 2 (SiO 2 -PDA-PIA). The potential applications of these SiO 2 -PDA-PIA polymer composites to remove cationic organic dye methylene blue (MB) have also examined. The morphology and structures of SiO 2 -PDA-PIA are systematically characterized using transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS) measurements. The SiO 2 -PDA-PIA composites show good surface morphology and abundant functional groups, which can be used as an excellent adsorbent for the removal of cationic dye pollutants. The effects of contact time, initial MB concentration, solution pH and temperature on the MB adsorption have been investigated. The adsorption of MB onto SiO 2 -PDA-PIA is highly dependent on the solution pH, initial MB concentration and temperature. As compared with pure SiO 2 , the SiO 2 -PDA-PIA shows 3-fold increase in adsorption capacity toward MB. The kinetic results show that the adsorption process is well-described by the pseudo-second-order. The equilibrium data are fitted using Langmuir and Freundlich isotherm models. The results show that the better agreement is Langmuir isotherm model with the correlation coefficient of 0.9954. The thermodynamic analyses show that the adsorption of MB onto SiO 2 -PDA-PIA is endothermic and spontaneous. Besides, the maximum adsorption capacity is calculated to be 215.97 mg/g. The high adsorption capacity of SiO 2 -PDA-PIA composites makes them to be promising adsorbents for the practical application in environment.
研究领域:
材料科学
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环境科学
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聚合物化学
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表面科学
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DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 11
·944
·
IF 4.4
Liping Zhao,Jinyun Xu,Ming Li,Yanyan Ji,Yu Sun,Ziqi Zhang,Xudong Hu,Zhe Peng,Yicong Wang,Chunming Zheng,Xiaohong Sun
Aluminosilicates, abundant and crucial in both natural environments and industry, often involve uncontrollable chemical components when derived from minerals, making further chemical purification and reaction more complicated. This study utilizes pure alumina and fumed silica powders as more controllable sources, enhancing aluminosilicate reactivity through room temperature (non-firing) processing and providing a robust framework that resists mechanical stress and high temperature. By embedding iron-based metal–organic frameworks (Fe-MOF/non-firing aluminosilicate membranes) within the above matrix, these ceramic membranes not only preserve their mechanical robustness but also gain significant chemical functionality, enhancing their capacity to removing phytochromes from the vegetables. Sodium hydroxide and sodium silicate were selected as activators to successfully prepare high-strength, non-firing aluminosilicate membranes. These membranes demonstrated a flexural strength of 8.7 MPa under wet-culture conditions with a molar ratio of Al2O3:SiO2:NaOH:Na2SiO3at 1:1:0.49:0.16. The chlorophyll adsorption of spinach conducted on these membranes showed a removal rate exceeding 90% at room temperature and pH = 9, highlighting its potential for the selective adsorption of chlorophyll. This study underscores the potential of MOF-enhanced aluminosilicate ceramic membranes in environmental applications, particularly for agricultural pollution control.
研究领域:
材料科学
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环境工程
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农业科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
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IF 5.774
Islam A. Abdelhafeez,Jiabin Chen,Xuefei Zhou
Herein, we report a scalable, green and “bottom-up” approach for the synthesis of ultralight g-C 3 N 4 nanosheets . The ultralight g-C 3 N 4 nanosheets (9.6 mg cm −3 ) have been entirely synthesized in a wet atmosphere in one step without pretreatment or any other additives. The as-prepared material (UMCN-wet) appears as a foam-like exterior with ultrathin nanosheets (3.5 nm), short-order polymerization and sharp edges. The X-ray diffraction (XRD), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses confirm the formation of melon units with edge-enriched active sites. UMCN-wet exhibits a higher specific surface area (137.44 m 2 g −1 ) and pore volume (0.2076 cm 3 g −1 ), compared with that of the as-synthesized materials in the air (MCN-air) and nitrogen (MCN-N 2 ) atmospheres. The optical and electrochemical analyses reveal that UMCN-wet manifests fast photogenerated charge separation and transfer with slow decay kinetics. As a result, UMCN-wet nanosheets exhibit superb photocatalytic degradation of rhodamine B (RhB), methylene blue (MB) and methyl orange (MO) under visible light irradiation with photodegradation rate constant ( k ) of 0.17687, 0.02409 and 0.00537 min −1 , respectively. Moreover, UMCN-wet exhibits excellent stability and reusability performance. Such a sustainable approach does not only overcome the prolonged time processing, extra energy consumption and utilization of hazardous chemicals for synthesis ultrathin g-C 3 N 4 nanosheets, but also paves a new pathway for industrial upscale production with numerous expected environmental applications.
研究领域:
材料科学
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纳米技术
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环境科学
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化学工程
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光化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）