TALANTA
·
2016
·
IF 4.035
Li-Shun Zhang,Qing-Li Zhao,Xin-Xin Li,Xi-Xi Li,Yan-Ping Huang,Zhao-Sheng Liu
A hybrid monolith incorporated with mesoporous molecular sieve MCM-41 of uniform pore structure and high surface area was prepared with binary green porogens in the first time. With a mixture of room temperature ionic liquids and deep eutectic solvents as porogens, MCM-41 was modified with 3-(trimethoxysilyl) propyl methacrylate (γ-MPS) and the resulting MCM-41-MPS was incorporated into poly (BMA-co-EDMA) monoliths covalently. Because of good dispersibility of MCM-41-MPS in the green solvent-based polymerization system, high permeability and homogeneity for the resultant hybrid monolithic columns was achieved. The MCM-41-MPS grafted monolith was characterized by scanning electron microscopy, energy dispersive spectrometer area scanning, transmission electron microscopy, FT-IR spectra and nitrogen adsorption tests. Chromatographic performance of MCM-41-MPS grafted monolith was characterized by separating small molecules in capillary electrochromatography , including phenol series, naphthyl substitutes, aniline series and alkyl benzenes. The maximum column efficiency of MCM-41-MPS grafted monolith reached 209,000 plates/m, which was twice higher than the corresponding MCM-41-MPS free monolith. Moreover, successful separation of non-steroidal anti-inflammatory drugs and polycyclic aromatic hydrocarbons demonstrated the capacity in broad-spectrum application of the MCM-41-MPS incorporated monolith. The results indicated that green synthesis using room temperature ionic liquid and deep eutectic solvents is an effective method to prepare molecular sieve-incorporated monolithic column.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Qian Zhang,Xinyan Xu,Chenzhuo Song,Dengke Zhang,Yi Kong,Xinyi Cui
Tire wear particles (TWP), as an emerging type of microplastics, are a significant source of contaminants in roadside soils due to their high concentration of pollutants, including polycyclic aromatic hydrocarbons (PAHs). This study explored the impact of ultraviolet (UV) exposure and natural aging on the in vitro bioaccessibility of PAHs associated with TWP in soil on a China-wide scale. Our findings suggested that UV exposure amplified the negative charge of TWP by 75 % and increased the hydrophobic groups on the particle surface. The bioaccessibility of 3- and 4-ring PAHs in TWP was significantly ( p < 0.05) heightened by UV exposure. After 20 types of soils containing 2 % UV-exposed TWP underwent natural aging, the bioaccessibility of PAHs saw a significant decrease ( p < 0.05) to 16–48 %, compared to 28–96 % in the unaged group. Soil pH and electrical conductivity (EC) were the two primary soil properties positively influencing the reduction of in vitro PAHs concentration and PAHs bioaccessibility. According to the prediction results, soils in southern China presented the highest potential region for the release of bioaccessible PAHs from TWP, highlighting the regional specificity of environmental impact. Our study provides valuable insights into the biological impact of PAHs associated with TWP on a regional scale, and offers scientific evidence for targeted soil risk management strategies.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Jialin Zhao,Jian Gao,Yijia Lei,Jingyi Wu,Na Li,Yan Wang,Junjian Yu,Zhiyan Sui,Jiayao Yang,Zhe Wang
In this work, the polymerization of hydrophobic pentafluorophenylethyl into the high conductivity poly (acenaphthenyl aryl piperidinium) backbone was catalyzed by an efficient and facile one-pot method with super-strong acids to build enhanced phase separation structures while maintaining low swelling. The prepared QPANTP-20-F 15 membrane exhibited the most significant hydrophilic-hydrophobic separation phenomenon, with the conductivity as high as 192.19 mS cm −1 at 80 °C. Due to the incorporation of hydrophobic fluorinated groups, the water uptake of the membrane was limited, and its mechanical (71.0 MPa under hydrated condition) and dimensional stability property (11.32% swelling) showed improved results. In addition, after 1200 h at 80 °C in 3 M/5 M NaOH solution, the structure of the prepared polymer exhibited excellent chemical stability property, with conductivity remaining of 95.04% and 86.38%, respectively. With current density of 706 mA cm −2 at 80 °C, the AEMFCs achieved a peak power density of 321 mW cm −2 .
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Chemosensors
·
2024
·Vol. 12
·期 10
·220
·
IF 3.7
Ting Hu,Yitao Xia,You Wang,Li Lin,Rong An,Ling Xu,Xiangdong Qing
Polycyclic aromatic hydrocarbons (PAHs) are a group of organic compounds that are both toxic and hazardous to human health and ecological systems. In recent work, a novel analytical strategy based on the chemometric-assisted HPLC-DAD method was proposed for the quantification and source apportionment of eight PAHs in PM10 samples. Compared to traditional chromatographic methods, this approach does not require the purification of complex PM10 samples. Instead, it utilizes a mathematical separation method to extract analytes’ profiles from overlapping chromatographic peaks, enabling precise quantification of PAHs in PM10. Firstly, 40 PM10 samples collected in Loudi city during two sampling periods were used for analysis. Subsequently, the second-order calibration method based on alternating trilinear decomposition (ATLD) was employed to handle the three-way HPLC-DAD data. Finally, the pollution sources of PAHs were analyzed by the feature component analysis method according to the obtained relative concentration matrix. For the validation model, the average recoveries of eight PAHs were between (88.8 ± 7.6)% and (105.6 ± 7.5)%, and the root-mean-square errors of prediction ranged from 0.03 μg mL−1to 0.47 μg mL−1. The obtained limits of quantification for eight PAHs were in the range of 0.0050 μg mL−1to 0.079 μg mL−1. For actual PM10 samples, results of the feature component analysis indicated that the main source of PAHs in PM10 may be traffic emissions and coal combustion. In summary, the proposed method provided a new and rapid analysis method for the accurate determination and source apportionment of PAHs in atmospheric aerosols.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Yixin Kuang,Suxin Zhou,Yuefan Liu,Xiaoying Feng,Luyi Chen,Juan Zheng,Gangfeng Ouyang
The size of the adsorbent has the potential to influence extraction performance, but the size effect at the nanoscale is still poorly understood. In this study, organic-inorganic hybrid nanospheres (OIHNs) with controllable nanoscale sizes of 30, 50, and 100 nm were successfully prepared. These materials were further fabricated as solid phase microextraction (SPME) coatings with similar thicknesses, and coupled with gas chromatography-mass spectrometry (GC-MS) to investigate their extraction performance. The results showed that the extraction capacities of OIHNs for chlorobenzenes (CBs) and polycyclic aromatic hydrocarbons (PAHs) were much better than those of their corresponding derived carbon materials, despite the smaller specific surface areas and lower porosities of them. In addition, the enrichment performance increased significantly with decreasing particle size, and the OIHN-30 coating demonstrated the best performance, with enrichment factors ranging from 1098 to 6853 for CBs. Finally, a highly sensitive and practical analytical method was established with a wide linear range of 0.5–5000 ng·L −1 , and the limits of quantification (LOQs) were 0.43–1.7 ng·L −1 . The determinations of ultratrace CBs in five marine water samples and five fresh water samples were realized successfully. This study is expected to contribute to a deep understanding of the environmental effects of nanoparticles and the design of high-performance adsorbents.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Bin Qiao,Yansong Li,Pan Hu,Yu Sun,Zhaozhao Si,Shiying Lu,Honglin Ren,Zengshan Liu,Ying Zhang,Lei Meng,Yu Zhou
Fluorene is a priority pollutant in water listed by U.S. Environmental Protection Agency. A fluorescent probe using Eu(III)-marked polystyrene nanoparticles (EuNPs) labelled with a monoclonal antibody (MAb) was synthesized and an immunochromatographic assay (ICA) based on the probe (EuNPs-MAb) was developed for rapid and sensitive detection of fluorene in water samples. The concentration of fluorene was inversely proportional to fluorescence intensity values of T-line in the range 0.98–62.50 ng/mL. The limit of detection (LOD) for quantitative detection of fluorene was 0.09 ng/mL. Recoveries of fluorene in various water samples ranged from 81.50% to 103.00% and coefficients of variation (CVs) were below 13%, which were in a good agreement with those of traditional ELISA (R 2 = 0.99). The assay can be performed within 30 min. The integrated ICA strip gave higher sensitivity and reliable reproducibility. It could be a potential method for rapid and sensitive detection of fluorene in water samples.
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GREEN CHEMISTRY
·
2024
·Vol. 26
·期 6
·3211-3220
·
IF 9.3
Pengfei Li,Yehong Han,Dandan Han,Hongyuan Yan
An innovative solid-phase microextraction (SPME) fiber coating, melamine–formaldehyde resin (MFR), was synthesized with a green cross-linker (paraformaldehyde), and it exhibited high heat resistance (up to 350 °C). Seven polycyclic aromatic hydrocarbons (PAHs) were chosen as analytes, and the results demonstrated the MFR-based SPME fiber's exceptional enrichment capabilities and efficient extraction, with high enrichment factors and significantly improved efficiency compared to the conventional polydimethylsiloxane (PDMS) fibers. The unique superiority of the MFR was attributed to its strong π–π interactions and amino-associated enhancement, as well as its porous structure and rough surface, which provided abundant adsorption sites and facilitated rapid mass transport of analytes. Furthermore, the preparation conditions of the MFR-coated SPME fiber were compared with those of commercially available and reported fibers, emphasizing the advantages of the MFR-coated fiber, such as its simplicity, cost-effectiveness, reproducibility, and eco-friendliness. The MFR-based SPME fiber exhibited significant advantages, including high enrichment factors (ranging from 1906- to 7153-fold) for PAHs and good fiber-to-fiber reproducibility (8.7–14.6%), outperforming commercially available PDMS fibers by a factor of 4.9–82.8-fold. This study also considered important factors affecting the extraction process, such as ionic strength, temperature, and time, and optimized these parameters for the best extraction efficiency. The greenness of the developed method was assessed using the Analytical Eco-Scale, and the results showed that it was green in terms of reagent dosage, energy consumption, and waste. The developed headspace solid phase microextraction–gas chromatography–tandem mass spectrometry (HS-SPME-GC-MS/MS) method based on the MFR coating exhibited excellent precision, accuracy, and repeatability, making it a reliable method for the determination of trace PAHs in environmental water samples.
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ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Min Sun,Jiaqing Feng,Yang Feng,Xubo Xin,Yali Ding,Juanjuan Feng
Background Because of the advantages of good selectivity , high sensitivity, and fast analysis, high performance liquid chromatography (HPLC) has become one of the modern analytical techniques in wide application range, such as biological analysis, environmental detection, pharmaceutical and food inspection, agriculture and other fields. The stationary phase greatly decides the chromatographic separation performance, so the development of novel stationary phase is most important for HPLC. Results Pyridyl conjugated microporous polymers (P-CMP) with one to four layers were modified on the surface of amino silica to obtain a novel core-shell material (SiO2@P-CMP) by the layer-by-layer assembly strategy and Chichibabin reaction . The relationship between the structure of SiO2@P-CMP and chromatographic performance was carefully investigated, and the retention mechanism was revealed. The interactions including π-π stacking, hydrophobic effect and hydrogen bond gradually enhanced with the increase of P-CMP layers on the silica surface. Compared with C18 column, SiO2@P-CMP columns displayed better separation selectivity for polycyclic aromatic hydrocarbons (PAHs). According to the relative retention values ( α ), the separation performance of SiO2@P-CMP columns ( α = 1.144–1.884) for PAH isomers and other analytes was obviously better than that of C18 column ( α = 0.998–1.487). Furthermore, the SiO2@P-CMP column with four layers was selected to separate different types of analytes (eight PAHs, four bisphenols , four estrogens and nine phthalates), and the peak order of analytes was different from that on the C18 column due to the influence of hydrogen-bonding and π-π interactions. The relative standard deviations (n = 10) of retention time and peak area on SiO2@P-CMP column were between 0.28 % and 1.98 %. Significance and novelty Pyridyl conjugated microporous polymer was introduced as the stationary phase for the first time in HPLC. The proposed column displayed better separation characteristics compared to Zorbax SB-C 18 column. It provided a new idea for the separation of small molecules and the development of chromatographic packing or extraction material.
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TALANTA
·
2014
·
IF 3.511
Man Wang,Shihai Cui,Xiaodi Yang,Wentao Bi
An easy preparation of g-C 3 N 4 /Fe 3 O 4 nanocomposites by chemical co-precipitation has been demonstrated. The as-prepared materials were characterized by X-ray diffraction, transmission electron microscopy , Fourier transform infrared spectroscopy and thermogravimetric analysis . The high affinity of g-C 3 N 4 toward polycyclic aromatic hydrocarbons and the magnetic behavior of Fe 3 O 4 were combined to provide an efficient and simple magnetic solid phase extraction (MSPE). The adsorption and desorption of polycyclic aromatic hydrocarbons on g-C 3 N 4 /Fe 3 O 4 were examined. Different factors affecting the magnetic solid phase extraction of polycyclic aromatic hydrocarbons were assessed in terms of adsorption, desorption, and recovery. Under the optimized conditions, the proposed method showed good limits of detection (LOD, S/N=3) in the range of 0.05–0.1 ng mL −1 and precision in the range of 1.8–5.3% (RSDs, n =3). This method was also successfully applied to the analysis of real water samples; good spiked recoveries over the range of 80.0–99.8% were obtained.
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Polymers
·
2025
·Vol. 17
·期 12
·1716
·
IF 4.9
Lili Kong,Xinna Yu,Qifang Sun,Meizhen Huang,Tianyuan Liu,Jie Chen
Polycyclic aromatic hydrocarbons (PAHs) have attracted significant attention due to their severe threats to both ecological systems and human health. In this paper, a high-performance surface-enhanced Raman spectroscopy (SERS) substrate based on NCF/GO/Au@Ag nanocomposites was developed, which enabled sensitive and stable detection of PAHs. The NCF/GO/Au@Ag substrate synergistic utilizes the localized surface plasmon resonance (LSPR) effect of Au@Ag core–shell nanorods and the additional interfacial charge transfer provided by graphene oxide (GO) to exhibit extremely high sensitivity. And the three-dimensional fibrous network of nanocellulose (NCF) improved nanoparticle dispersion uniformity. Combined finite element simulations and experimental studies verified that the dual plasmonic resonances (512 nm and 772 nm) of Au@Ag nanorods optimally match 785 nm excitation, yielding an enhancement factor of 5.21 × 10 5 . GO integration enhanced Raman signals by 1.68-fold through interfacial charge transfer, while the introduction of NCF reduced the signal relative standard deviation (RSD) from 36.88% to 4.29%. The NCF/GO/Au@Ag substrate achieved a detection limit of 10 μg/L for PAHs, demonstrating exceptional sensitivity and reproducibility.
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MARINE POLLUTION BULLETIN
·
2025
·
IF 4.9
Ruicong Gao,Jiaqi Lu,Zhixuan Wei,Hao Xu,Siyuan Jing,Minghuo Wu
PAHs, a group of persistent organic pollutants with significant carcinogenic and mutagenic effects, are widely distributed in the environment and can accumulate in sediments, posing potential threats to mangrove ecosystems and human health. This study is one of the most recent studies that presents an analysis of the vertical contamination characteristics of PAHs in mangrove sediments down to a depth of 80 cm, utilizing a combination of solid-phase extraction and gas chromatography–mass spectrometry. The results showed that the mean value of PAHs was 258.82 ng/g (range from 226.41 to 320.07 ng/g) in the studied mangrove areas (Beihai City, Guangxi). The results indicated a decline in PAH concentrations with increasing sediment depth, with values of 259.3 ng/g in surface sediments (0–10 cm), 240.9 ng/g in intermediate sediments (30–40 cm), and 241.1 ng/g in deeper sediments (60–70 cm). This suggests that PAHs not only remain in the surface layer of the sediment, as in previous studies, but also migrate vertically within the sediment. Based on the results, the potential ecological risks of PAHs were also evaluated by the ERL/ERM model. After environmental risk assessment, it was found that among the six PAHs studied, the contents of all except acenaphthene were lower than the ERL, indicating a low ecological risk. This study elucidates the vertical distribution of PAHs in mangrove sediments, offering crucial data for ecological risk assessment and establishing a foundation for future research on PAH transport mechanisms and their ecological impacts, thereby informing environmental management strategies.
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GREEN CHEMISTRY
·
2025
·
IF 9.2
Kaihao Mo,Peng Cui,Dongni Liu,Cailan Chen,Hanyu Zhang,Minmeng Tang,Peiwen Wu,Yan Huang,Haiyan Ji,Wenshuai Zhu
In extraction processes, the low mass transfer efficiency of conventional ionic liquids is a refractory problem. Herein, a porous ionic liquid (PIL), β-CD-900-PIL, was innovatively constructed by combining a porous carbon material (β-CD-900) derived from β-cyclodextrin polymer with imidazole bis-trifluoromethylsulfonylimide ionic liquid ([C12mim][NTf2]). The N2 sorption isotherm and CO2 adsorption confirmed the porosity of β-CD-900 and the PIL. With the dispersion amount of β-CD-900 as 20 wt%, the extraction efficiency of naphthalene by β-CD-900-PIL reached 66.6%, which was 24% higher than that of the ionic liquid. After three extractions, the naphthalene content decreased from 500 mg L−1 to 5 mg L−1. The high extraction efficiency was attributed to the high porosity and abundant π–π and C–H⋯π interactions between PILs and naphthalene. The more than 99% extraction performance, low viscosity and low preparation cost make β-CD-900-PIL an ideal extractant for polycyclic aromatic hydrocarbons in the petrochemical industry.
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