COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2018
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IF 2.829
Li Lu,Yan Lin,Qiwei Chai,Shanying He,Chunping Yang
Rice bran, bamboo and the biochar derived from them were used as four sorbents for the removal of acenaphthene from aqueous solution. The effects of coexisting metal ions and organic compounds on their sorption performances were investigated. The sorption capacity of acenaphthene by biochar prepared from rice bran and bamboo was significantly higher than the raw biomass. The coexisting Cu 2+ and Cr(VI) both inhibited the sorption of acenaphthene by the biochar, whereas the sorption of acenaphthene by the biomass was less affected by the coexisting ions. The coexisting phenanthrene exhibited obvious competition with acenaphthene on the biochar, but it showed no competition with acenaphthene on the biomass. The partition process was a dominate sorption mechanism for acenaphthene on the biomass, which was not easily affected by the coexisting substances. Both partition and surface adsorption were enabled for acenaphthene on the biochar, and the latter was more affected by coexisting heavy metals and organic compounds.
研究领域:
环境科学
·
生态学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2022
·
IF 2.731
Zhen Li,Lina Sun,Hui Wang
Microplastics (MPs) have a tremendous potential to sorb hydrophobic organic contaminants in the soil environment. The effects of MPs in the soil systems, however, remain largely unexplored. The objective of this study was to investigate the impact of polyethylene and polystyrene MPs on the transport of the benzo[a]anthracene (BaA) and benzo[a]pyrene (BaP) in soil matrices. In this study, we investigated the sorption process of BaA and BaP in batch sorption experiments in a laboratory and systematically evaluated the particle sizes of MPs (0.8, 50, 200, and 500 μm) and the environmental factors, such as pH, ionic strength, and humic acid (HA) concentration on adsorption behaviour. The results showed that the adsorption of PAHs onto MPs reached equilibrium within 24 h. The adsorption kinetics of PAHs onto MPs were fitted well with the pseudo-first-order kinetic model. The adsorption isotherm modelling showed a better fit of the adsorption results to the Freundlich model. The thermodynamic research indicated the adsorption of BaA and BaP as spontaneous and endothermic processes. Additionally, the adsorption capacity of BaA and BaP reached the highest when polyethylene and polystyrene MPs with a particle size of 0.8 μm and 50 μm, respectively. The sorption of BaA and BaP on PE and PS MPs was significantly influenced by pH and the peaking at pH 5.0 and 7.0, respectively. Furthermore, the adsorption mechanisms of the BaA and BaP on MPs were dominated by electrostatic interaction, π–π interactions, and hydrophobic interaction.
研究领域:
环境科学
·
土壤学
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DOI
高影响因子
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
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2014
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IF 2.235
Meng Lin,Xiaoke Hu,Weiwei Chen,Hui Wang,Chuanyuan Wang
A phenanthrene (PHE) degrading bacterium strain BZ-3 was isolated from the crude oil contaminated soil in Binzhou, China. The isolate was identified as Pseudomonas sp. BZ-3 on the basis of 16S rRNA gene sequence. Various experiments were conducted to investigate the effect of pH, salinity and PHE concentration on the degradation efficiency of PHE. The degradation efficiency and degradation metabolites of PHE were detected by using GC–MS and HPLC-MS analyses. The strain BZ-3 could degrade 75% of PHE at an initial concentration of 50 mg/L under 20 g/L salinity in 7 days. PHE degradation kinetics was estimated in a first-order degradation rate model and the rate coefficient was calculated as 0.108 d −1 . On the basis of the identified degradation metabolites, the strain BZ-3 could degrade PHE in the salicylate metabolic pathway. In a mixture system consisting of PHE and other PAHs including naphthalene (NA), anthracene (ANTH), and pyrene (PYR), the strain BZ-3 showed an efficiently degradation capability. Further study showed that the strain BZ-3 could also use NA, ANTH, PYR, xylene, 1-hydroxy-2-naphthoic acid, and hexane as the sole carbon and energy source, but did not grow on nitrobenzene-containing medium.
研究领域:
环境科学
·
微生物学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Lei Tian,Mengni Pan,Cuiping Ye,Hongbo Hao,Wenying Li
Phenanthrene (Phe) and fluorene (Flu) are crucial chemical intermediates with applications in materials, medicine, and pesticides. However, conventional separation methods struggle to effectively isolate phenanthrene from fluorene due to their similar physical properties. To address this challenge, a reaction–separation coupling technique was employed to convert fluorene into 9-fluorenone (9-Fluo), followed by the separation of phenanthrene from 9-fluorenone using solvent-cooling crystallization. Initially, the relative solubilities of phenanthrene and 9-fluorenone in 2072 solvents were calculated using COSMO-RS for preliminary screening. Among various conventional short-chain aliphatic alcohols and low-carbon saturated hydrocarbons, methanol, and cyclohexane were identified as the most effective solvents based on their solubility selectivity (SS). The molecular interactions between phenanthrene or 9-fluorenone and these solvents were analyzed using theoretical methods such as σ-potential/profile, infinite dilution activity coefficients in COSMO-RS, and Hansen solubility parameters, with further confirmation from FTIR tests. The optimal liquid–solid ratios were determined using both phase diagram measurements and solubility calculations. The reaction conversion of fluorene to 9-fluorenone was complete regardless of the raw material used. Phenanthrene and 9-fluorenone were effectively separated using methanol and cyclohexane with optimum liquid–solid mass ratios of 1.6:1 and 2.8:1, respectively. In the model mixture, the contents of phenanthrene and 9-fluorenone exceeded 98 wt%, with yields above 91 wt%. For anthracene residue, the content of 9-fluorenone reached 93.98 wt% with a yield of 84.52 wt%, while its content was only 76.58 wt% due to the accumulation of other components in phenanthrene.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2015
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IF 2.752
Wenjun Zhou,Qi Yang,Cuiping Chen,Qianqian Wu,Lizhong Zhu
Recovering and then recycling surfactant solution is required in the surfactant-enhanced remediation (SER) of contaminated sites and groundwater to reduce operating costs and prevent secondary contamination. In this study, fixed-beds with activated carbon were employed to selectively remove phenanthrene from Triton X-100 (TX100) aqueous solution as a potential model system for the recovery of surfactant solution in SER. The effects of various operating conditions such as flow rate, bed height, and influent phenanthrene concentration on the performance of the fixed beds were investigated. The sorption of TX100 in the fixed-bed can rapidly reach saturation, but the effluent concentrations of phenanthrene are much lower than its influent concentrations, even with a great volume of solution flowing through the columns. The total removal percentage of phenanthrene from effluent solution was greater than the sorption loss of TX100 under all experimental conditions. The corresponding selectivity parameters for phenanthrene removal versus surfactant sorption were all greater than 4.0, a selectivity value representing 80% phenanthrene removal and 80% surfactant retention. Moreover, better selectivity was obtained at a higher bed height and lower flow rate, but had little dependence on the influent phenanthrene concentration. The constant-pattern model and the apparent partition coefficient were applied successfully to describe and predict the breakthrough curves of TX100 and phenanthrene in fixed-bed columns. The results suggested that fixed-beds could be effectively used to recover surfactant solutions from the washing effluents in SER.
研究领域:
环境科学
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污染修复
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Yanwei Wang,Jiahui Zhao,Yipeng Xu,Jing Miao,Keyu Pan,Yihan Li,Yong Chen,Xuesong Liu,Ailin Zhao,Jingyu Qin,Tengfei Xu,Mingliang Fang
Human exposure to polycyclic aromatic hydrocarbons (PAHs) as mutagenic and carcinogenic pollutants in the environment often occurs in the form of mixtures. Although the mixture effects of PAHs have been previously recognized, the toxicological mechanisms to explain them still remain quite unclear. This study combined metabolomics and chemical proteomics methods to comprehensively understand the mixture effects of a PAH mixture including benzo(a)anthracene (BaA), benzo(b)fluoranthene (BbF), benzo(a)pyrene (BaP), and chrysene (CHR). Among them, BaA has shown a strong synergistic effect with other PAHs. Interestingly, BaA alone is not a potent oxidative stress inducer in liver cells but dose-dependently amplifies oxidative damage caused by the PAH mixture. Global metabolomics analysis results revealed damage to the antioxidant glutathione synthesis, which was caused by the glutamine depletion caused by BaA in the mixture. Subsequently, the label-free chemical proteomics and cellular thermal shift analysis (CETSA) demonstrated that the PAH mixture altered the thermal shift of glutamine transporter SLC1A5. Furthermore, Western blotting and the isothermal titration calorimetry (ITC) interaction measurements showed nanomolar KD values between BaA and SLC1A5. Overall, this study showed that BaA synergistically contributed to PAH mixture induced oxidative damage by targeting SLC1A5 to inhibit glutamate transport into cells, resulting in the inhibition of glutathione synthesis.
研究领域:
环境毒理学
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代谢组学
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化学蛋白质组学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yangyang Ma,Chiquan He,Linlin Yang,Xiaoyan Liu,Feifei Wang
Benzo [a] anthracene (BaA), a highly toxic tetracyclic polycyclic aromatic hydrocarbon, is frequently detected in soils worldwide. Traditional high-temperature thermal desorption and unactivated advanced oxidation process (AOP) are either energy-intensive or inefficient due to slow pollutant degradation. This study presented an innovative and effective remediation approach for BaA contaminated soil by combining low-temperature thermal desorption with AOP. The combined method utilizes heat from low-temperature thermal desorption to activate sodium persulfate, thereby enhancing BaA degradation. The results demonstrated that the combined low-temperature thermal desorption and AOP achieved an impressive BaA removal efficiency of up to 92.7 % at 60 °C and 90 °C, surpassing the efficiency of individual treatments. The primary reactive oxygen species responsible for BaA degradation were identified as sulfate radicals and hydroxyl radicals with both contributing nearly equally to the process. The study identified the intermediates formed during BaA degradation and proposed a degradation pathway. The intermediates had lower boiling points and reduced toxicity compared to BaA, indicating the mineralization process was effective in reducing environmental risks. Additionally, the addition of 3 mL methanol improved BaA removal efficiency to 62.2 % from 41.9 % in the control group without methanol, indicating the addition of methanol in AOP significantly improved BaA removal by enhancing desorption from soil particles. This research underscores the potential of the combined low-temperature thermal desorption and AOP as a sustainable, energy-efficient, and cost-effective remediation technology for soils contaminated with polycyclic aromatic hydrocarbons, offering a promising solution for soil remediation.
研究领域:
环境科学
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土壤修复
·
化学工程
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DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 11
·1-9
·
IF 5.479
Xue Jin-Hua,Liu Ling,Wang Yong-Sheng,Li Jia-Qian,Li Mei,Qu Yue-Ning,Li Le
This work describes a method for the determination of 1-hydroxypyrene (OH-Py) via aggregation-induced quenching of the emission of protamine-coated gold nanoclusters using 9-hydroxyphenanthrene (OH-Phe) as a sensitizer to boost the emission efficiency of nanoprobe. Under optimum conditions, the drop in fluorescence intensity at excitation/emission wavelengths of 300/596 nm is proportional to the concentrations of OH-Py in the range from 1.0 to 65 nM. The relative standard deviations are 4.2, 2.4 and 1.9% (for n = 11) at concentration levels of 8.0, 32 and 48 nM of OH-Py, respectively. The detection limit is 0.3 nM which is much lower than that of some previously reported methods. The recoveries from urine samples spiked with OH-Py ranged between 94.4 and 98.8%.
1-Hydroxypyrene (OH-Py) can trigger the aggregation of protamine-gold nanoclusters (PRT-AuNCs), resulting in the emission quenching of PRT-AuNCs. 9-Hydroxyphenanthrene (OH-Phe) can boost the emission efficiency of nanoprobe. Thereby, a highly sensitive assay of OH-Py was established.
研究领域:
分析化学
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环境医学
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纳米生物学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2020
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IF 4.389
Jin-Hua Xue,Ke-Ping Xiao,Yong-Sheng Wang,Ling Liu,Jia-Qian Li,Mei Li,Yue-Ning Qu,Xi-Lin Xiao
In this study, we confirmed that protamine-templated gold nanoclusters (PRT-AuNCs) exhibit aggregation-induced emission properties (AIE-PRT-AuNCs). 1-Hydroxypyrene (1−OHPy) further induced the aggregation of AIE-PRT-AuNCs via hydrogen bonding and electrostatic and hydrophobic interactions, resulting in the aggregation-induced photoluminescence enhancement of AIE-PRT-AuNCs. 9-Hydroxyphenanthrene was able to decrease the background signal, thus increasing the sensitivity of the method. Based on these findings, a cost-effective, highly sensitive and selective strategy was proposed for the quantitative detection of 1−OHPy. This method displayed a wide linear range of 0.924 – 74.1 nmol/L with a low detection limit of 0.277 nmol/L, showing great potential for the monitoring of 1−OHPy in human urine. This strategy may provide a theoretical basis for future studies of the AIE properties of metal nanoclusters and their applications in the field of chemical and biological sensing.
研究领域:
分析化学
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生物医学工程
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环境科学
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DOI
PubMed
高影响因子
POLYCYCLIC AROMATIC COMPOUNDS
·
2022
·
IF 2.195
Dan Liu,Jing Zhang,Linfeng Chen,Yaxian Zhu,Yong Zhang
The interactions of methylphenanthrene (MP) isomers (1-MP, 3-MP, 4-MP, and 9-MP) with human serum albumin (HSA) were studied in simulated physiological conditions. A fluorescence analysis revealed that each MP formed a 1:1 ground-state complex with HSA. The binding constants at 308 K decreased in the order of 3-MP (9.13 × 104 L·mol−1) > 9-MP (3.57 × 104 L·mol−1) > 4-MP (2.37 × 104 L·mol−1) > 1-MP (1.46 × 104 L·mol−1), which was consistent with the docking results. The Kb values at 298 K, 308 K, and 318 K revealed that the β-isomer has a stronger binding affinity with HSA than the α-isomer. Thermodynamic and docking parameters showed that MPs combined with HSA through van der Waals forces. The results of the binding site competition experiment and molecular docking indicated that 4-MP bound at subdomain IIA in HSA molecule, while the other MPs bound at a site between subdomains IB and IIA. The circular dichroism (CD) spectra showed that the α-helical content of HSA reduced in the presence of 1-MP, 4-MP and 9-MP, while no significant change was observed in the presence of 3-MP. Further, the fluorescence spectroscopic studies revealed that the Vitamin B2 (VB2)-transporting function of HSA was inhibited by 3-MP and 9-MP, and enhanced by 1-MP and 4-MP. Moreover, the impact degrees of MPs on the VB2-transporting function had a positive correlation with the binding affinities of the MPs to HSA. HighlightsInteractions of MP isomers methylated at varying sites with HSA were studied.The α-substituted MP had a weaker affinity to HSA than β-substituted MP.Binding site of 4-MP in HSA was different from that of 1-MP/3-MP/9-MP.MP isomers unfolded the α-helical structure of HSA to varying degrees.Transporting function of HSA was inhibited by 3-MP/9-MP but enhanced by 1-MP/4-MP.
研究领域:
生物化学
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药物化学
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结构生物学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Di Lei,Tingting Chen,Cuifang Fan,Qingzhen Xie
Benz[a]anthracene (BaA), a hazardous polycyclic aromatic hydrocarbon classified by the EPA, is a probable reproductive toxicant. Epidemiological studies suggest that BaA exposure may be a risk factor for recurrent miscarriage (RM). However, the underlying mechanisms are not well understood. This study identified DEC1 as a key gene through RNA-seq and single-cell RNA sequencing analysis. DEC1 expression was found to be downregulated in villous tissues from women with RM and in primary extravillous trophoblasts (EVTs) exposed to BaA. BaA suppressed DEC1 expression by promoting abnormal methylation patterns. Further analysis revealed that ARHGAP5 is a direct target of DEC1 in EVTs, where DEC1 inhibits trophoblast invasion by directly regulating ARHGAP5 transcription. Additionally, BaA destabilized matrix metalloproteinase 2 (MMP2) by activating the aryl hydrocarbon receptor (AhR) and promoting E3 ubiquitin ligase MID1-mediated degradation. In a mouse model, BaA induced miscarriage by modulating the DEC1/ARHGAP5 and MID1/MMP2 axes. Notably, BaA-induced miscarriage in mice was prevented by DEC1 overexpression or MID1 knockdown. These findings indicate that BaA exposure leads to miscarriage by suppressing the DEC1/ARHGAP5 pathway and enhancing the MID1/MMP2 pathway in human EVTs.
研究领域:
生殖毒理学
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分子生物学
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细胞生物学
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表观遗传学
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动物模型
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产品关联
DOI
PubMed
高影响因子
Chemosensors
·
2025
·Vol. 13
·期 7
·263
·
IF 3.7
Huili Hao,Chengjun Qiu,Wei Qu,Yuan Zhuang,Zizi Zhao,Haozheng Liu,Wenhao Wang,Jiahua Su,Wei Tao
7,12-Dimethylbenzo[a]anthracene (DMBA-7,12), a highly toxic and environmentally persistent polycyclic aromatic hydrocarbon (PAH), poses significant threats to marine biodiversity and human health due to its bioaccumulation through the food chain. Conventional chromatographic methods, while achieving comparable detection limits, are hindered by the need for expensive instrumentation and prolonged analysis times, rendering them unsuitable for rapid on-site monitoring of DMBA-7,12 in marine environments. Therefore, the development of novel, efficient detection techniques is imperative. In this study, we have successfully developed an electrochemical immunosensor based on a polydopamine (PDA)–chitosan (CTs) composite interface to overcome existing technical limitations. PDA provides a robust scaffold for antibody immobilization due to its strong adhesive properties, while CTs enhances signal amplification and biocompatibility. The synergistic integration of these materials combines the high efficiency of electrochemical detection with the specificity of antigen–antibody recognition, enabling precise qualitative and quantitative analysis of the target analyte through monitoring changes in the electrochemical properties at the electrode surface. By systematically optimizing key experimental parameters, including buffer pH, probe concentration, and antibody loading, we have constructed the first electrochemical immunosensor for detecting DMBA-7,12 in seawater. The sensor achieved a detection limit as low as 0.42 ng/mL. In spiked seawater samples, the recovery rates ranged from 95.53% to 99.44%, with relative standard deviations (RSDs) ≤ 4.6%, demonstrating excellent accuracy and reliability. This innovative approach offers a cost-effective and efficient solution for the in situ rapid monitoring of trace carcinogens in marine environments, potentially advancing the field of marine pollutant detection technologies.
研究领域:
环境科学
·
分析化学
·
生物化学
·
传感器技术
·
海洋污染监测
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）