ACS Applied Nano Materials
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2023
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IF 5.9
Ya Lu,Zhuanfang Bi,Guangyi Shang
Fluorene, as one of the important organic compounds widely used in the field of medicine and photoelectric materials, could damage human health even if it is extremely low in the environment. The development of ultrasensitive and easy-recyclable surface-enhanced Raman scattering (SERS) detection of trace fluorene is highly desired. In this work, a nanocomposite of Ag nanoparticles (Ag NPs) and porous g-C3N4 is synthesized by a facile method. The advantageous features of the as-prepared nanocomposite include a high SERS sensitivity due to the plasmonic effect of the Ag NPs, excellent recyclability due to the self-cleaning ability originating from the photocatalytic degradation of porous g-C3N4 under visible light irradiation, and good adsorption due to the large specific surface area of porous g-C3N4. The experimental results show that an ultralow detection limit of 1.35 × 10–13 M for R6G can be achieved. Especially, the nanocomposite exhibits excellent performance for the detection of fluorene with the detection limit of 3.11 × 10–11 M and multidetection of at least 13 cycles. The present research provides a nanocomposite with excellent synergistic activity of plasmonic enhancement and photocatalytic degradation for the recyclable SERS detection of trace fluorene.
研究领域:
材料科学
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环境科学
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分析化学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2023
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IF 9.8
Zan Wang,Haiyang Hu,Zhan Zhang,Yongming Xu,Ping Xu,Hongzhi Tang
Polycyclic aromatic hydrocarbons (PAHs) and heterocyclic derivatives are organic pollutants which threaten ecosystems and human beings. In this study, a new strain, Shinella sp. FLN 14, was isolated and characterized. It can utilize fluorene as its sole carbon source and effectively co-metabolize multiple PAHs and heterocyclic derivatives, including phenanthrene , acenaphthene, and fluoranthene . Two possible metabolic pathways are proposed (i.e., salicylic acid pathway and phthalic acid pathway). Whole-genome sequencing revealed that strain FLN14 possesses a chromosome and four plasmids. However, when combined with ensemble genetic information, novel fluorene-degrading functional gene clusters were not located within the genome of FLN 14, except for some new dioxygenases and electron transport chains, which typically initiate the oxidation of aromatic compounds. In wastewater bioremediation, strain FLN14 removed nearly 95 % of PAHs within 5 days and maintained high degrading activity during the 18-day reaction compared to the control. Overall, our study provides a promising candidate to achieve bioremediation of PAHs-contaminated environments.
研究领域:
环境科学
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微生物学
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DOI
PubMed
高影响因子
WATER SCIENCE AND TECHNOLOGY
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2024
·Vol. 89
·期 7
·1682-1700
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IF 2.5
Zhang Longbin,Gao Jianxiong,Liu Yulong,Zhou Zhengyuan,Sheng Xianxian,Li Dexiao,Chen Yuantian,Lyu Shuguang
View large Download slide View large Download slide Close modal In this research, ascorbic acid (AA) was used to enhance Fe(II)/Fe(III)-activated permonosulfate (PMS) systems for the degradation of fluoranthene (FLT). AA enhanced the production of ROS in both PMS/Fe(II) and PMS/Fe(III) systems through chelation and reduction and thus improved the degradation performance of FLT. The optimal molar ratio in PMS/Fe(II)/AA/FLT and PMS/Fe(III)/AA/FLT processes were 2/2/4/1 and 5/10/5/1, respectively. In addition, the experimental results on the effect of FLT degradation under different groundwater matrixes indicated that PMS/Fe(III)/AA system was more adaptable to different water quality conditions than the PMS/Fe(II)/AA system. was the major reactive oxygen species (ROS) responsible for FLT removal through the probe and scavenging tests in both systems. Furthermore, the degradation intermediates of FLT were analyzed using gas chromatograph-mass spectrometry (GC-MS), and the probable degradation pathways of FLT degradation were proposed. In addition, the removal of FLT was also tested in actual groundwater and the results showed that by increasing the dose and pre-adjusting the solution pH, 88.8 and 100% of the FLT was removed for PMS/Fe(II)/AA and PMS/Fe(III)/AA systems. The above experimental results demonstrated that PMS/Fe(II)/AA and PMS/Fe(III)/AA processes have a great perspective in practice for the rehabilitation of FLT-polluted groundwater. The effect of AA on the circulation between Fe(II) and Fe(III) in the PMS system was investigated. SO 4 •− was the primary ROS in PMS/Fe(II)/AA and PMS/Fe(III)/AA systems. The effect of actual groundwater matrixes on FLT removal was investigated. The possible degradation pathways of FLT were proposed. Effective degradation of FLT in actual groundwater was achieved.
研究领域:
环境科学
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化学
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DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
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2013
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IF 4.75
Dong Zhang,Lizhong Zhu,Feng Li
Surfactant-enhanced bioremediation has been proposed as a promising technology for the treatment of organic polluted soils; however its application has been hindered by the controversial influences and mechanisms of surfactants on the biodegradation of hydrophobic organic compounds. To address this problem, effects of five surfactants on the sorption and biodegradation of pyrene by Klebsiella oxytoca PYR-1, as well as their interactions with bacterial cell surface and membrane lipids were investigated. We found that surfactants enhanced or inhibited pyrene biodegradation depending on their effects on the sorption of pyrene onto bacterial cell, which occurred mainly through modifying cell surface hydrophobicity (such as Tween series surfactants) or disrupting bacterial membrane (such as Triton X-100), respectively. A relatively high positive correlation ( P < 0.0001) was observed between biodegradation promotion ( B s ∗ / B 0 ∗ ) and enhancement of sorption coefficients ( K d,s ∗ / K d,0 ∗ ) for pyrene in the presence of surfactant, indicating that surfactant-induced sorption played the dominant role during pyrene biodegradation.
研究领域:
环境科学
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微生物学
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DOI
PubMed
高影响因子
ANALYST
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2024
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IF 3.6
Jiahuan Zhang,Chaoqun Fei,Shulan Qi,Jiaqi Fu,Shi Zhou,Zhong Wang,Jinlian Li,Yanli Zhao,Dongmei Wu
The electrochemical detection method of cytotoxicity using intracellular purines as biomarkers has shown great potential for in vitro drug toxicity evaluation. However, no electrochemical detection system based on an in vitro drug metabolism mechanism has been devised. In this paper, electrochemical voltammetry was used to investigate the effect of the S9 system on the electrochemical behavior of HepG2 cells, and benzo[a]pyrene, fluoranthene, and pyrene were employed to investigate the sensitivity of electrochemical signals of cells to the cytotoxicity of drugs metabolized by the S9 system. The results showed that, within 8 h of exposure to the S9 system, the electrochemical signal of HepG2 cells at 0.7 V did not alter noticeably. The levels of xanthine, guanine, hypoxanthine, and adenine in the cells were not significantly altered. Compared with the absence of S9 system metabolism, benzo[a]pyrene and fluoranthene processed by the S9 system decreased the electrochemical signal of the cells in a dose-dependent manner, while pyrene did not change it appreciably. HPLC also revealed that benzo[a]pyrene and fluoranthene metabolized by the S9 system decreased the intracellular purine levels, whereas pyrene had no effect on them before and after S9 system metabolism. The cytotoxicity results of the three drugs examined by electrochemical voltammetry and MTT assay showed a strong correlation and good agreement. The S9 system had no effect on the intracellular purine levels or the electrochemical signal of cells. When the drug was metabolized by the S9 system, variations in cytotoxicity could be precisely detected by electrochemical voltammetry.
研究领域:
毒理学
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药理学
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分析化学
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产品关联
DOI
PubMed
高影响因子
BIOORGANIC CHEMISTRY
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2025
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IF 4.7
Wenjian Dong,Yifan Wang,Chunhua Ni,Xuefeng Yan,Liangmin Yu,Xia Li,Na Li,Jian Yang,Junchao Yin
Marine antifouling materials based on fluorescence characteristics are the development trend for environmentally friendly marine antifouling coatings. Existing fluorescent antifouling materials face limitations such as limited functions and unclear mechanisms. A novel fluoranthene derivative was synthesized by Friedel–Crafts alkylation reaction, after which zinc acrylate resin containing the derivative was prepared. The results of the performance evaluation revealed that the inhibitory effect of the resin on algae growth was 28.4 %, and the antiadhesion effect increased by 72.7 %, which indicated that the resin had chemical repellent properties. Compared with that under the incubator light, the antiadhesion performance under sunlight increased by 52.4 %. The concentrations of photosynthetic pigments in the algae increased by 41.2 % (carotenoids), whereas the EPS decreased by 42.6 % (RPS) and 13.1 % (CPS). These results suggested that the fluorescence effect promoted the photosynthesis of algae and reduced the secretion of EPS. The actual sea antifouling test results confirmed that the resin has excellent antifouling effects because of its combination of fluorescence, chemical repellency and self-polishing properties. This study laid the foundation for the development of a multifunctional and environmentally friendly marine antifouling material belt.
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PubMed
高影响因子
Journal of Water Process Engineering
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2025
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IF 6.7
Xianxian Sheng,Meesam Ali,Ruoxuan Xu,Mudassir Habib,Xiang Zhang,Qian Sui,Rongbing Fu,Shuguang Lyu
Mackinawite (FeS) is a promising catalyst for advanced oxidation processes (AOPs), but its role in activating sodium percarbonate (SPC)-dominated oxidation remains unclear. Herein, citric acid (CA) was introduced as a synergistic agent to enhance FeS activation of SPC, demonstrating that SPC/FeS and SPC/CA systems hardly removed 6.8 % and 7.6 % of fluoranthene (FLT), respectively, while SPC/FeS/CA process achieved a significant 96.2 % FLT degradation. Reactive oxygen species (ROS) analysis identified HO and O 2 − as the dominant contributors to FLT degradation. X-ray photoelectron spectroscopy (XPS) confirmed that S(-II) facilitated the Fe(III)/Fe(II) redox cycle, ensuring prolonged FLT degradation, which was further confirmed through Na 2 S experiments. GC–MS identified benzoic acid (BA) and phthalic acid (PA) as degradation intermediates with reduced toxicity than FLT, highlighting the environmental safety of the proposed technique. SPC/FeS/CA system effectively mitigated the inhibitory effects of neutral to weakly alkaline pH conditions (8.0–10.0) and achieved significant FLT degradation (60.7 %) even at pH 11.0. In soil slurry experiments, the process removed 80 % of FLT within 12 h. The system effectively degraded other polycyclic aromatic hydrocarbons (PAHs), including naphthalene and phenanthrene, demonstrating its broad applicability for remediating PAHs-contaminated environments. This study introduces a novel SPC-dominated AOP strategy, leveraging FeS as a robust catalyst, and offers valuable insights for advancing efficient PAHs remediation technologies.
研究领域:
环境科学
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化学工程
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土壤修复技术
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高级氧化工艺
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有机污染物降解
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Shi Zhou,Peng Guo,Jinlian Li,Lingren Meng,Hongfu Gao,Xing Yuan,Dongmei Wu
Fluorene was one of the priority controlled polycyclic aromatic hydrocarbons (PAHs) and distributed abundantly in the environment, which has a great harmful on human body. It was very important to detect the cytotoxicity of fluorene with a rapid and accurate method. In this present work, a simple and ultrasensitive electrochemical biosensor was developed by electrodeposition of reduced graphene oxide quantum dots (RGOQDs) on glassy carbon electrode (GCE) for the first time. The electrochemical behaviors of uric acid (UA), xanthine (X) and guanine (G) were studied on RGOQDs/GCE by differential pulse voltammetry (DPV) with a limit of detection of 0.024 μM, respectively. Then the electrochemical biosensor was used to evaluate the cytotoxicity of fluorene for MCF-7 cells based on the variation of G/X in MCF-7 cells solution. The result showed that fluorene exposed to MCF-7 cells at the concentration range of 0–0.05 mM could promote cell proliferation, the concentration above 0.05 mM exhibited inhibitory effect, which was verified by methyl-thiazolyl-tetrazolium (MTT) assay. The electrochemical biosensor based on RGOQDs/GCE could be used not only for evaluation the cytotoxicity of PAHs, but also for detection the physiological process related to intracellular purine nucleotide metabolism.
研究领域:
生物医学工程
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环境科学
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毒理学
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产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 16
·4402
·
IF 3.623
Qingqing Cao,Siqi Lu,Wenjun Yin,Yan Kang,Naihao Yang,Yudong Hou,Zizhang Guo
High-ring polycyclic aromatic hydrocarbons (PAHs, Benzo[b]fluorathene (BbFA), etc.) are difficult to biodegrade in the water environment. To address this issue, an innovative method for the preparation of MnO2nanoflower/graphene oxide composite (MnO2NF/GO) was proposed for adsorption removal of BbFA. The physicochemical properties of MnO2NF/GO were characterized by SEM, TEM, XRD, and N2adsorption/desorption and XPS techniques. Results show that the MnO2NF/GO had well-developed specific surface area and functional groups. Batch adsorption experiment results showed that adsorption capacity for BbFA was 74.07 mg/g. The pseudo-second-order kinetic model and Freundlich isotherm model are fitted well to the adsorption data. These show electron-donor-acceptor interaction; especially π-π interaction and π complexation played vital roles in BbFA removal onto MnO2NF/GO. The study highlights the promising potential adsorbent for removal of PAHs.Keywords:MnO2nanoflower;graphene oxide;PAHs;adsorption
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2021
·
IF 3.512
Qingqing Cao,Yan Li,Yan Kang,Zizhang Guo
Polycyclic aromatic hydrocarbons (PAHs), as hazardous pollutants, could be removed by constructed wetlands (CWs). While the traditional substrate of CWs has a weak adsorption capacity for PAHs, in this study, the carbonous fillers—activated carbon (AC) and biochar—were added into the substrate of surface flow CWs to improve the removal performance of benzofluoranthrene (BbFA), a typical PAH. The results showed that the BbFA removal efficiencies in CWs with the addition of AC and biochar were 11.8 and 1.2% higher than those in the Control group, respectively. Simultaneously, the removal efficiencies of NO3––N were 42.8 and 68.4% in these two CWs, while the BbFA content in the substrate and plants with the addition of carbon was lower than that in the Control group. The addition of carbonous filler reduced the absorption of PAHs by plants in CWs and enhanced microbial degradation. The microbial community results showed that the relative abundance of Proteobacteria, especially γ-proteobacteria, was higher with the addition of fillers, which related to PAH degradation.
研究领域:
环境科学
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水处理
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污染控制
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微生物学
✓ 已验证
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2020
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IF 4.872
Yilin Zhang,Dongwei Liu,Zhangsuo Liu
Background Evidence shows that individuals who are under long-term exposure to environmental PM 2.5 are at increased risk of chronic kidney disease. Various laboratory experiments also suggest several mechanistic links between PM 2.5 exposure and kidney injury. Polycyclic aromatic hydrocarbons (PAHs) are common organic chemicals existing in PM 2.5 . However, whether benzo [b]fluoranthene (BbF), the most potent carcinogens and the highest content of PAHs, plays an important role in podocyte injury via reducing autophagy, have not been reported. Methods Podocytes were exposed to different concentrations and times of BbF. Cell viability was assessed by using CCK-8. Morphological phenotypes were detected by using optical microscopy. Cytoskeletons were detected by using immunofluorescence assay. Expression of podocyte injury markers were determined by Western blot. Podocytes were observed under TEM, autophagic activity was evaluated by Western blot analysis and immunofluorescence assay. A possible effect of an inhibitor (CQ, chloroquine) or an inducer (rapamycin) of autophagy on BbF-induced podocyte injury also was examined. Results BbF changed cellular morphology, decreased cell viability and rearranged cytoskeleton. The proteins' expression level of autophagy and the numbers of autophagosomes under TEM was decreased and the proteins’ expression level of slit diaphragm was increased in a dose- and time-dependent manner. In addition, BbF-induced podocyte injury was enhanced by inhibition of autophagy and inhibited by activation of autophagy in podocytes. Conclusions Taken together, our data suggest that BbF is toxic to podocytes, as well as reduce autophagy. Furthermore, inhibition of autophagy plays a regulatory role in BbF-induced podocyte injury.
研究领域:
环境健康
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毒理学
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细胞生物学
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肾病学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Xianxian Sheng,Meesam Ali,Longbin Zhang,Mudassir Habib,Qian Sui,Shuguang Lyu
The efficient and eco-friendly remediation of polycyclic aromatic hydrocarbons (PAHs) in soil and groundwater through advanced oxidation remains a critical challenge. In this study, nano zero-valent iron (nZVI) and sulfurized nano zero-valent iron (S-nZVI) were utilized to activate peroxymonosulfate (PMS), demonstrating significant potential for fluoranthene (FLT) degradation. PMS/S-nZVI system outperformed PMS/nZVI system, achieving higher efficiency with lower reagent dosages. Dissolved Fe(II) analysis indicated enhanced Fe(III)/Fe(II) cycling in PMS/S-nZVI system, driven by the synergistic role of elemental sulfur. Both systems generated reactive species (SO 4 − •, O 2 − •, and HO•), with SO 4 − • identified as the dominant contributor to FLT degradation. Water quality variations significantly impacted FLT removal, with PMS/S-nZVI system exhibiting greater adaptability to diverse conditions compared to PMS/nZVI system. FLT degradation was more effective under acidic conditions. The high concentrations of HCO 3 − , Br − , and HA, and the presence of surfactants such as Tween-80 significantly hindered degradation. In contrast, low concentrations of Cl − and HA enhanced the process. Simulated real groundwater experiments revealed that pre-conditioning the solution pH to 5.0 achieved FLT removal efficiencies of 89.9 % and 91.8 % for PMS/nZVI and PMS/S-nZVI systems, respectively, with oxidant dosages increased by fivefold. In water-soil coupled slurry experiments, a water-soil ratio of 15:1, a reaction time of 6 h, and neutral post-reaction pH resulted in FLT degradation exceeding 90 %. This study highlights the potential of PMS-based advanced oxidation processes, particularly PMS/S-nZVI system, as an effective and adaptable approach for the remediation of PAHs-contaminated soil and groundwater.
研究领域:
环境科学
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纳米技术
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化学工程
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水处理
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土壤修复
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）