MICROCHEMICAL JOURNAL
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2020
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IF 3.594
Jian Chen,Na Li,Jianghua Liu,Fuping Zheng
A facile and rapid magnetic solid phase extraction (MSPE) based on magnetic covalent organic framework and coupled with high performance liquid chromatography diode array detection (HPLC-DAD) has been developed for detection of 11 kind of polycyclic aromatic hydrocarbons (PAHs) in food samples. In this paper, the novel magnetic core-shell structured (Fe 3 O 4 @COFs) nanocomposites were consisted with the magnetic Fe 3 O 4 nanoparticles (NPs) as a core, and 1,3,5-tris (4-aminophenyl) benzene (TAPB) and 2,5-dihydroxyterephthalaldehyde (DP) as two ligands for building shell outside of the core. These new nanocomposites were applied as superior adsorbent to enrich the PAHs due to their merits of large specific surface area, highly porosity and excellent thermal stability. The conditions that may affect the enrichment efficiency in MSPE process, including desorption solvent, amount of sorbent , extraction time, desorption time and desorption adsorption volume were investigated systematically. By combining MSPE with HPLC-DAD, an effective method for the detection of trace PAHs was successfully developed, which exhibited good linearity with R 2 ranging from 0.9954 to 0.9988, satisfactory recoveries in the range of 83.2–119.3%, and the relative standard deviations (RSD) was lower than 5.8%. In addition, the proposed MSPE-HPLC-DAD method was shown excellent ability to enrich trace PAHs effectively in food samples and potential application in extract other aromatic compounds .
研究领域:
分析化学
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材料科学
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环境科学
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食品科学
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DOI
高影响因子
ANALYTICAL LETTERS
·
2024
·
IF 1.6
Cheng Qian,Pei Zhang,Chao Nie,Hui Jiang,Linghu Cai,Xiangyu Chen,Minghua Liu
Green MgO-based banana peel activated carbon (MgO-BPAC) with distinctive pore structure features was synthesized with magnesium nitrate as the template and activator. A novel solid-phase microextraction (SPME) fiber was prepared by fixing MgO-BPAC on the surface of a stainless-steel wire using silicone sealant. The fiber was coupled with gas chromatography-mass spectrometry (GC-MS) for headspace-solid phase microextraction-GC-MS (HS-SPME-GC-MS) for polycyclic aromatic hydrocarbons (PAHs). The laboratory-constructed fiber showed good extraction efficiency for naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, and anthracene and the corresponding analytical parameters were determined. The method provided low detection limits (0.86–2.12 ng/L) with satisfactory replicate extractions of one fiber (relative standard deviations ≤ 10.30%) and fiber to fiber reproducibility (relative standard deviations ≤ 13.92%). To validate the performance of the homemade fibers, this approach was used for the determination of the PAHs (0.05 μg/L) in spiked environmental water samples and good recoveries (92.67%–114.45%) were obtained. This study introduces a biocarbon material as a functional fiber coating component which adsorbs aromatic constituents through hydrophobic interactions.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2019
·Vol. 411
·期 18
·4073-4084
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IF 3.286
Xia Ling,He Yuanyuan,Xiao Xiaohua,Li Gongke
Herein, a total online device based on field-assisted extraction (FAE), micro-solid-phase extraction (μ-SPE), and high-performance liquid chromatography (HPLC) was designed. Solid samples were pretreated with ultrasound-microwave synergic effects, and then the extract was cleaned up online with a monolithic column, followed by HPLC analysis. The cross-actions between ultrasound and microwave along with other extraction parameters were studied systematically. The efficiency of this online method was verified in the determination of polycyclic aromatic hydrocarbons (PAHs) in foods and tetracycline antibiotics (TCAs) in cosmetic samples. The detection limits of nine PAHs including fluorene, phenanthrene, anthracene, fluoranthene, benzo[k]fluoranthene, benz[a]anthracene, benzo[b]fluoranthene, pyrene, and benzo[a]pyrene were all within 0.075–0.30 μg/kg, as well as four TCAs including oxytetracycline, tetracycline, chlortetracycline, and doxycycline were within 0.02–0.06 μg/kg. Six PAHs were found in roast potatoes and baked fish and the recoveries were in the range of 71.5–119.7% with RSDs of 0.2–10.9% ( n = 3). The recoveries for TCAs in cosmetic samples were in the range of 75.3–118.0% with RSDs lower than 8.2% ( n = 3). Compared with those offline methods, this total online FAE-μ-SPE-HPLC method not only simplifies the operation process, but also increases the precision and accuracy. Beyond trace analytes analysis in solid and semi-solid matrixes, application of this total online analysis method can also be extended to investigate field-assisted extraction mechanisms.
Graphical abstract
研究领域:
分析化学
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环境科学
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药物分析
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DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2018
·
IF 1.712
Xiaoqiang Jia,Yun He,Lei Huang,Dawei Jiang,Wenyu Lu
The high-molecular weight polycyclic aromatic hydrocarbons (PAHs) pyrene and typical long chain alkane n -hexadecane are both difficult to degrade. In this study, n -hexadecane and pyrene degrading strain Rhodococcus sp. T1 was isolated from oil contaminated soil. Strain T1 could remove 90.81% n -hexadecane (2 vol%) and 42.79% pyrene (200 mg·L − 1 ) as a single carbon within 5 days, respectively. Comparatively, the degradation of pyrene increased to 60.63%, but the degradation of n -hexadecane decreased to 87.55% when these compounds were mixed. Additionally, identification and analysis of degradation metabolites of Rhodococcus sp. T1 in the above experiments showed that there were significant changes in alanine, methylamine, citric acid and heptadecanoic acid between sole and dual substrate degradation. The optimal conditions for degradation were then determined based on analysis of the pH, salinity, additional nutrient sources and liquid surface activity. Under the optimal conditions of pH 7.0, 35 °C, 0.5% NaCl, 5 mg·L − 1 of yeast extract and 90 mg·L − 1 of surfactant, the degradation increased in single or dual carbon sources. To our knowledge, this is the first study to discuss metabolite changes in Rhodococcus sp. T1 using sole substrate and dual substrate to enhance the long-chain alkanes and PAHs degradation potential.
研究领域:
环境微生物学
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生物修复
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生物化学
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DOI
高影响因子
ANALYTICAL LETTERS
·
2025
·
IF 1.8
Lin Yang,Guoqing Zou,Fengfeng Xiu,Dandan Zhao,Jianliang Fei,Jun Xie
Polycyclic aromatic hydrocarbons (PAHs) in soil pose significant analytical challenges due to matrix complexity, low concentrations, and co-extracted interferents. Conventional gas chromatography-mass spectrometry (GC-MS) methods suffer from limited sensitivity and selectivity, particularly for high-molecular-weight PAHs with stable molecular ions that resist fragmentation. Here, we present a novel gas chromatography-tandem mass spectrometry (GC-MS/MS) method using pseudo-multiple reaction monitoring (PMRM) coupled with an optimized extraction protocol for precise quantification of 16 USEPA priority PAHs in soil. By exploiting the inherent stability of PAH molecular ions ([M]+), PMRM achieved 3.1–4.8 times lower detection limits than traditional selected ion monitoring (SIM) while resolving critical isomer pairs (e.g., phenanthrene/anthracene, R > 1.5) through time-segmented collision energy (CE) optimization (5–25 eV). A streamlined extraction using acetonitrile modified with anhydrous Na2SO4 eliminated labor-intensive cleanup, achieving >85% recovery across a wide logKow range (3.37–6.50). The PMRM strategy enhanced signal-to-noise ratios by collisional focusing and differential interference fragmentation, enabling direct injection of crude extracts without compromising sensitivity. This approach addresses long-standing limitations in PAH analysis, offering a robust, high-throughput solution for environmental monitoring and regulatory compliance, with potential applications to other structurally stable pollutants.
研究领域:
环境化学
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分析化学
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质谱学
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环境科学
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色谱学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2019
·
IF 5.589
Yanjun Hu,Wenjing Yu,Haryo Wibowo,Yuanyuan Xia,Yanjun Lu,Mi Yan
This study was aimed at investigating the effect of four types of catalysts on the distribution characteristics of 16 polycyclic-aromatic hydrocarbon (PAHs) in bio-oils from the pyrolysis of dry sewage sludge. The pyrolysis experiments of sewage sludge were conducted in a tubular reactor at the high and low temperatures of 850 °C and 450 °C, respectively. CaO, KCl, Na 2 CO 3 , and Fe 2 O 3 were selected as catalysts for the catalyzed pyrolysis. In the non-catalyzed sludge pyrolysis, PAHs concentrations in bio-oil increased with temperature, reaching a maximum value of 15.25 μg/g at 850 °C. This value was 4.5 times higher than PAHs concentration from the non-catalyzed pyrolysis at 450 °C. With the presence of catalysts at 850 °C, an evident reduction of PAHs concentration was observed for all the bio-oil samples. The added catalysts proved to effectively inhibit PAHs formation in bio-oil and reduce the toxic equivalent quantity (TEQ) of PAHs in the experiment at high temperature. The lowest observed PAHs concentration in bio-oil was 4.23 μg/g, obtained with the use of KCl catalyst. However, an opposite trend was observed for catalyzed pyrolysis at 450 °C. The added catalysts promoted PAHs formation, up to the concentration of 8.89 μg/g with the use of CaO catalyst. Catalyst loading also influenced PAHs concentration and TEQ, with the lowest output found at 20% loading for all catalysts. Bio-oil yields, mass ratio of 16 PAHs concentrated into bio-oil, the TEQ of 16 PAHs and their subtotal group classified by ring number were separately examined to analyze their effects on fractional distribution of the total PAH amount. Overall, the presence of the selected catalysts was found to have the ability to inhibit PAHs production at higher pyrolysis temperature and to promote PAHs production at lower pyrolysis temperature.
研究领域:
环境科学
·
能源工程
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DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Junmin Ji,Yaxin Zhang,Dan Wang,Yan Wang
The coconut shell-based activated charcoal was decorated by three different electronegativities of surfactants (CTAB, SDS, and Triton X-100) through the impregnation method, and the decorated activated charcoal adsorbents were used for the removal of PAHs from peanut oil, respectively. The influence of surfactant decoration on the adsorption and detoxification effect of coconut shell-based activated charcoal was discussed. The thermodynamic and kinetic behaviors of PAHs adsorption on the surfactant-modified activated charcoal were investigated, and the adsorption mechanism was analyzed in-depth. Notably, the prepared modified coconut shell activated charcoal could not only remove more than 90% of PAHs from the peanut oil but also keep the cytotoxicity of the treated peanut oil low. Meanwhile, the detoxification procedure has little effect on the nutritional quality and flavor of the peanut oil. The results of this fundamental study demonstrate that the low-cost surfactant-modified coconut shell-based activated charcoal was effective and feasible.
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Ji-Zheng Song,Chu-Qi Wang,Guan-Shuo Yu,Zhe Sun,Ai-Hua Wu,Zhen-Ming Chi,Guang-Lei Liu
Crude oil is a hazardous pollutant that poses significant and lasting harm to human health and ecosystems. In this study, Moesziomyces aphidis XM01, a biosurfactant mannosylerythritol lipids (MELs)-producing yeast, was utilized for crude oil degradation. Unlike most microorganisms relying on cytochrome P450, XM01 employed two extracellular unspecific peroxygenases, MaUPO.1 and MaUPO.2, with preference for polycyclic aromatic hydrocarbons (PAHs) and n-alkanes respectively, thus facilitating efficient crude oil degradation. The MELs produced by XM01 exhibited a significant emulsification activity of 65.9% for crude oil and were consequently supplemented in an "exogenous MELs addition" strategy to boost crude oil degradation, resulting in an optimal degradation ratio of 72.3%. Furthermore, a new and simple "pre-MELs production" strategy was implemented, achieving a maximum degradation ratio of 95.9%. During this process, the synergistic up-regulation of MaUPO.1 , MaUPO.1 and the key MELs synthesis genes contributed to the efficient degradation of crude oil. Additionally, the phylogenetic and geographic distribution analysis of MaUPO.1 and MaUPO.1 revealed their wide occurrence among fungi in Basidiomycota and Ascomycota, with high transcription levels across global ocean, highlighting their important role in biodegradation of crude oil. In conclusion, M. aphidis XM01 emerges as a novel yeast for efficient and eco-friendly crude oil degradation.
研究领域:
环境科学
·
微生物学
·
生物技术
·
生物化学
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产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Hua Li,Likun Zhao,Chaoqi Chen,Hua Zhu,Xuhui Mao
Microbial immobilization technology (MIT) is considered a feasible way to overcome unfavorable environmental conditions when a bioaugmentation method is used to remediate contaminated soil. In the present study, the feasibility of using immobilized PAH-degrading bacteria for the bioaugmentation remediation of polycyclic aromatic hydrocarbon (PAH) contaminated soil is explored in a surfactant-enhanced slurry bioreactor for the first time. The results showed that the immobilized Pseudomonas sp. DH-6 microspheres, which were prepared with 80 g/L polyvinyl alcohol (PVA), 10 g/L sodium alginate (SA), and 8 g/L activated carbon (AC), had good spherical shape and mechanical strength, and exhibited excellent performance for the removal of PAHs. The immobilized DH-6 was proven to significantly surpass the free DH-6 strain for removing of PAHs when encountering harsh environmental conditions, such as caustic pH and elevated concentrations of salts. The stability experiments showed that the immobilized DH-6 had excellent storage and recycling stability, and the removal efficiencies of PAHs could reach over 95 % after 90 days of storage or 5 times of use. This study also verified the effectiveness of immobilized DH-6 microspheres for the bioaugmentation remediation of PAH-contaminated field soil in a surfactant-enhanced slurry bioreactor. The results showed that 78.2 % of PAHs were removed within 21 days, which was significantly higher than that of the control group (39.9 %). This study reveals that the PVA/SA/AC gel microspheres with suitable immobilized strain could be engineered to achieve effective and time-saving bioaugmentation remediation of contaminated soil in slurry bioreactors.
研究领域:
环境生物技术
·
生物修复
·
微生物工程
·
污染控制
·
应用微生物学
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产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2018
·
IF 3.974
Ruilong Li,Huadong Tan,Linlin Zhang,Shaopeng Wang,Yinghui Wang,Kefu Yu
Microplastics sorption of persistent organic pollutants (POPs) was the core processes that cause negative effects to biota, and their influencing factors and related mechanisms are poorly understood. In this study, we explored the impacts of water extractable organic matter (WEOM), an important source of endogenous dissolved organic matter in mangrove sediment, on the sorption coefficients of typical parent, alkyl and N/O/S-containing polycyclic aromatic hydrocarbons (PAHs) by microplastics. The presence of L-WEOM (D) impeded the PAHs sorption as the coefficients ( K f ) decreased to 10.17 (μg/kg)/(μg/L) n and to 8.39 (μg/kg)/(μg/L) n for fluorene (Flu) and 1-methyl-fluorene (1-M-Flu), respectively. The K f exhibited good linear relationships with the aliphaticity of L-WEOM ( p < 0.05) rather than the aromatic carbon/alkyl carbon content ( p > 0.05). Under the presences of L-WEOM (D), (S) and (K), the lone pair electrons of N/O/S-containing PAHs was the dominant factor contributing to the obvious difference of the K f values from the other groups. Moreover, the largest impact of L-WEOM (D) on the Flu sorption was in the case of PVC microplastics, while almost no effect was in the case of PS microplastics. The findings of our work may be helpful in improving our understanding of the role of WEOM on the sorption of PAHs to microplastics in the field mangrove sediment.
研究领域:
环境科学
·
生态学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yan Feng,Yue Tao,Jianhua Qu,Ying Zhang
A remediation strategy for polycyclic aromatic hydrocarbons (PAHs) in soil was proposed that combined soil washing (SW) and photocatalytic oxidation. In this study, naphthalene (2-ring Nap), phenanthrene (3-ring PHE), and pyrene (4-ring Pyr) served as model pollutants. We assessed the efficacy of Triton X-100 (TX-100) in desorbing PAHs from contaminated soil and its impact on subsequent photocatalytic degradation. TX-100 achieved desorption efficiencies of 72.1% for Nap, 63.3% for PHE, and 52.1% for Pyr during SW. The desorption process of PAHs from soil showed strong closely dependent on TX-100 concentration. Furthermore, a BiOBr/g-C 3 N 4 -30% (BOB/CN-30%) photocatalyst was employed to decompose PAHs in both synthetic and real SW effluents. Quenching experiments and electron paramagnetic resonance (EPR) spectroscopy confirmed the generation of active species (h + , OH, and O 2 − ) in the BOB/CN-30% system. Based on the photocatalytic treatment of PAHs in the synthetic SW effluent, the reactivity impact of TX-100 on PAH degradation by BOB/CN-30% depended on the TX-100 concentration. Optimal TX-100 levels enhanced PAH solubilization and decomposition, whereas excessive concentrations formed dense micelles that obstructed PAH degradation. Moreover, the coupled system exhibited efficient recirculation in real SW tests, underscoring its potential as a remediation option for PAHs-contaminated soils.
研究领域:
环境科学
·
化学工程
·
污染治理
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产品关联
DOI
高影响因子
MARINE POLLUTION BULLETIN
·
2022
·
IF 7.001
Qian Wang,Hanwen Xu,Jie Yin,Shengnan Du,Caicai Liu,Juan-ying Li
The Yangtze River protection strategies are expected to improve the water quality and ecological function of the Yangtze River Estuary (YRE). The concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) and 6 heavy metals (HMs) in the YRE were measured and the riverine fluxes were calculated subsequently. In particular, the concentrations of low molecular weight PAHs (LMW-PAHs), arsenic (As) and mercury (Hg) in seawater decreased over time, while those of other studied pollutants did not change a lot. In sediments, the concentration changes for all the pollutants were insignificant. For the present pollutants, the river input is the dominant source, and the flux decreased after the protection. The contribution of the discharge from wastewater treatment plants (WWTPs) was quantified. Its influence cannot be ignored. The seafood quality remained stable and the risk via diet was insignificant. Long-term monitoring is necessary, and the positive impact of the Protection Strategy is gradually emerging.
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PubMed
高影响因子
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