Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Weidong Wang,Jun Shen,Yu Chen,Dezong Zheng,Lin Li
Benzene, toluene, ethylbenzene and styrene released from furniture and interior decoration materials are important chemicals affecting indoor air quality and have been shown to be harmful to human health. However, little attention is paid for VVOC and their health risks. To close this gap, in April 2022, a 15-L environmental chamber, combined with multibed tube, was used for gas sampling at the Northeast Forestry University laboratory. Emissions of VOC and VVOC from MDF coated with different lacquers were investigated using thermal desorption coupled with gas chromatography-mass spectrometry. The results showed that the total concentrations of VOC and VVOC increased by 37.33%, 96.88%, and 86.45%, respectively, after MDF was coated with water-based (WB), polyurethane (PU), and nitrocellulose (NC) lacquers. The total VVOC concentration from MDF was higher than the total VOC concentration. Alcohols were the most abundant chemicals in MDF, followed by aromatics and alkanes, together accounting for more than 70% of the total. Aromatics and alkanes were the most important VOC after painting. These three lacquers inhibited some VVOC but promoted other chemicals, like benzene, toluene, ethylbenzene and tetrahydrofuran . For health impacts, the cancer risk and noncancer risk of benzene from lacquered MDF were estimated to be 4.46 × 10 −5 to 6.42 × 10 −5 and 0.19 to 0.27 respectively, indicating a probable cancer risk and no obvious noncancer risk. WB-MDF is recommended for indoor applications. This research points the need for exploring environmentally friendly solvents to replace benzene, toluene and ethylbenzene in order to reduce emissions of volatile pollutants.
研究领域:
环境科学
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公共卫生
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2024
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IF 3.8
Manman Wu,Qin Ma,Mei Li,Zhen Zhou,Jingwei Xu,Geoffrey I.N. Waterhouse,Ninghui Song,Wei-Wei Zhao,Guangxu Chen
The monitoring of organic compounds in aquatic matrices poses challenges due to its complexity and time-intensive nature. To address these challenges, we introduce a novel approach utilizing a dual-channel mono ( 1 D) and comprehensive two-dimensional ( 2 D) gas chromatography coupled with time-of-flight mass spectrometry (GC × GC–TOFMS) system, integrated with a robotic pretreatment platform, for online monitoring of both volatile organic compounds (VOCs) and semivolatile organic compounds (SVOCs) in water matrices. Employing the robotic platform, we establish a suite of online liquid–liquid extraction (LLE) pretreatment processes for water samples, marking the first instance of such procedures. Leveraging the automatic headspace (HS) module, dual robotic preparations of HS and LLE are sequentially executed to extract VOCs and SVOCs from water matrices. The GC × GC–TOFMS system is distinguished by its dual-channel analytical column configuration, facilitating sequential analysis of VOCs in GC–TOFMS mode and SVOCs in GC × GC–TOFMS mode. Quantitative detection of 55 target VOCs and 104 SVOCs is achieved in a water sample using the instrument system. Our method demonstrates excellent correlation coefficients ranging from 0.990 to 1.000, method detection limits ranging from 0.08 to 4.78 μg L –1 , relative standard deviations below 19.3 %, and recovery rates ranging from 50.0 % to 124.0 %. To validate the online monitoring capabilities of our system, we assess target SVOCs at three different concentration levels over a 3-day period. Most compounds exhibit recovery rates ranging from 70.0 % to 130.0 %. Furthermore, we apply our method to analyze a real water sample, successfully identifying over 100 target and nontarget VOCs/SVOCs, including alcohols, aldehydes, ketones, acids, esters, and phenols. These results highlight the efficacy of the proposed analysis system, capable of conducting two distinct analyses in automatic sequence, thereby enhancing the efficiency and accuracy of organic compound analysis in water matrices.
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2022
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IF 6.056
Lu Liang,Yuchen Liu,Yuxin Liu,Siyi Gan,Xuejin Mao,Yuanxing Wang
The herbal tea made from the leaves and stems of Cyclocarya paliurus is thought to be more flavorful than those made from the leaves only. However, evidence supporting this view is not available yet. 53 VOCs and 54 non-VOCs were identified via HS-SPME-GC-MS and UPLC-Q-TOF/MS, respectively, which were found to vary dramatically in three groups of samples (combination of stems and leaves, separated leaves, and separated stems). 11 VOCs and 18 non-VOCs potential markers are responsible for the change of metabolic effects through the biosynthesis of flavonoids, the synthesis of terpenoids, and the oxidation of fatty acids and carotenoids. In response, the stems were effective to enhance fatty odors, the initial astringency and bitterness and the aftertaste of sweetness of the leaves. Stems are conducive to increasing total phenolic content, total flavonoid content and antioxidant capacity of Cyclocarya paliurus herbal extract because of the increase in polyphenols. In addition, the stems have the potential to be used as raw materials for nerolidol and polyphenols extraction. This study has been the first to determine the contribution of stem to the flavor of Cyclocarya paliurus herbal tea and these results provide the theoretical basis for making Cyclocarya paliurus herbal tea with stems.
研究领域:
植物化学
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食品科学
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代谢组学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2017
·Vol. 18
·期 11
·2235
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IF 3.226
Xing Chen,Fuyuan Wang,Liquan Lin,Hao Dong,Feifei Huang,Kanhar Ghulam Muhammad,Liying Chen,Olga Y. Gorlova
Lung cancer (LC) screening will be more efficient if it is applied to a well-defined high-risk population. Characteristics including metabolic byproducts may be taken into account to access LC risk more precisely. Breath examination provides a non-invasive method to monitor metabolic byproducts. However, the association between volatile organic compounds (VOCs) in exhaled breath and LC risk or LC risk factors is not studied. Exhaled breath samples from 122 healthy persons, who were given routine annual exam from December 2015 to December 2016, were analyzed using thermal desorption coupled with gas chromatography mass spectrometry (TD-GC-MS). Smoking characteristics, air quality, and other risk factors for lung cancer were collected. Univariate and multivariate analyses were used to evaluate the relationship between VOCs and LC risk factors. 7, 7, 11, and 27 VOCs were correlated with smoking status, smoking intensity, years of smoking, and depth of inhalation, respectively. Exhaled VOCs are related to smoking and might have a potential to evaluate LC risk more precisely. Both an assessment of temporal stability and testing in a prospective study are needed to establish the performance of VOCs such as 2,5-dimethylfuranm and 4-methyloctane as lung cancer risk biomarkers.Keywords:lung cancer;volatile organic compounds;smoking;breath test
研究领域:
医学
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代谢组学
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DOI
PubMed
高影响因子
Food Bioscience
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2024
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IF 4.8
Yuxin He,Mengwei Hu,Weiwei He,Yuhao Li,Shuai Liu,Xiaoyi Hu,Shaoping Nie,Junyi Yin,Mingyong Xie
Lactic acid bacteria (LAB) fermentation offers a promising strategy to address blueberry perishability, while also imparting its distinctive flavor and enhancing its health benefits. In this study, three strains of LAB ( Lactobacillus plantarum NCU116 , Lactobacillus casei NCU215, and Lactobacillus acidophilus NCU402) were meticulously selected to partake in the fermentation of blueberry juice. To evaluate their application prospects, this study scrutinized alterations in nutrients, flavor compounds, and color that transpire during the fermentation process. Throughout the fermentation of three LAB species, the glucose content and six main amino acids underwent a substantial decrease. There was a substantial augmentation in the concentrations of organic acids, particularly lactic acid. A noteworthy observation emerged as the blueberry juice subjected to L. plantarum NCU116 fermentation initiated the utilization of sucrose at 36 h, a phenomenon distinct from the fermentation dynamics observed in L. casei NCU215 and L. acidophilus NCU402. The fermentation process also led to a significant increase in the total content of identified volatile organic compounds (VOCs) in all blueberry juice samples, with L. plantarum NCU116 fermentation showing a remarkable increase among the three strains of LAB. This phenomenon is hypothesized to be related to the higher glycolysis and tricarboxylic acid cycling capacity exhibited by L. plantarum NCU116. In conclusion, these LAB strains, especially L. plantarum NCU116, can effectively utilize both glucose and amino acids as sources of carbon and nitrogen, fostering their growth, and facilitating the production of VOCs, especially terpene.
研究领域:
食品科学
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微生物学
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DOI
高影响因子
Foods
·
2023
·Vol. 12
·期 16
·3123
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IF 5.2
Xiaolei Fang,Yanping Chen,Jie Gao,Zimu Run,He Chen,Ruoqi Shi,Yingqiu Li,Haihua Zhang,Yuan Liu
The volatiles in coffee play an important part in the overall flavor profile. In this study, GC–TOF/MS and GC×GC–TOF/MS were used to detect the volatile organic compounds (VOCs) in coffee samples of three different brands at three states (bean, powder, and brew). The differences between the two methods in characterizing VOCs were analyzed using the Venn diagram and PCA (principal component analysis). The important aroma-contributing compounds were further compared and analyzed. The results of the venn diagrams of different coffee samples showed that most VOCs existed in 2–3 kinds of coffee. The PCA of VOCs in different coffee samples showed that the VOCs detected by GC–TOF/MS could distinguish the coffee samples in the different states. GC×GC–TOF/MS was suitable for the further identification and differentiation of the different brands of coffee samples. In addition, pyridine, pyrrole, alcohols, and phenols greatly contributed to distinguishing coffee in three states, and alcohols greatly contributed to distinguishing the three brands of coffee.Keywords:coffee;GC×GC–TOF/MS;GC–TOF/MS;volatile organic components
研究领域:
食品科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Shuo Yang,Zhiwei Shao,Ling N. Jin,Liuwen Chen,Xiang Zhang,Mingliang Fang,Dan Li,Jianmin Chen
Volatile organic compounds (VOCs) are significant pollutants found in various environments, posing health risks. Traditionally, the gaseous VOCs are adsorbed and eluted in liquid phases, and then subjected to toxicity testing, which deviates from the actual exposure scenarios of gaseous VOCs. How the physical states of VOCs (gaseous or liquid) affect their toxicity has not been well understood. This study examined the baseline toxicity of VOCs in both gaseous and liquid phases using a self-assembled passive colonization hydrogel (SAPCH) with luminous bacteria ( Vibrio fischeri ). The findings revealed that gaseous VOCs exhibited higher baseline toxicity than their liquid counterparts, attributed to the higher free energy and electronic activity of gaseous VOC molecules. Furthermore, the study elucidated that the differences in electronic transitions and energy gaps significantly impact the combined toxicity of VOC mixtures in different phases. Understanding these differences is crucial for assessing the real-world impact of VOCs on health and the environment.
研究领域:
环境生物学
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毒理学
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DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
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2025
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IF 2.8
Yun-Jiao Ma,An-Qi Bi,Ping Li,Bei-Wei Zhu,Ming Du,Xian-Bing Xu
The dual mode unity solid-phase microextraction (DMU-SPME) was evaluated against traditional solvent-based methods, including solvent-assisted flavor evaporation (SAFE) and simultaneous distillation extraction (SDE), to explore its potential as an alternative. Compared to SAFE and SDE, DMU-SPME is a green extraction technology for volatile organic compounds. The results demonstrated that DMU-SPME significantly outperformed both SAFE and SDE in extracting medium-volatility compounds (retention time of 20–40 min), identifying 55 unique volatiles. With the exception of hydrocarbons, DMU-SPME exhibited superior extraction efficiency and significantly better stability compared to both SAFE and SDE methods. Thus, DMU-SPME proves to be a promising alternative for the comprehensive extraction of volatile organic compounds.
研究领域:
食品科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2024
·Vol. 59
·期 44
·20624-20639
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IF 3.5
She Houde,Chen Dongxu,Huang Jingwei,Wang Lei,Chen Jiufu,Chen Xiaoping,Wang Qizhao
The removal of volatile organic compounds has been a long-standing challenge, and NH 2 -MIL125, with its large specific surface area, has shown great promise in this regard. However, its limited number of active sites hinders its widespread application. To address this limitation, we report the successful synthesis of a series of Co 3 O 4 -modified NH 2 -MIL125 metal–organic framework (MOF) composites with a lamellar structure. Notably, the optimized 35% Co 3 O 4 /NH 2 -MIL125 composite exhibited exceptional performance, achieving 85.59% degradation and 76.58% CO 2 conversion under simulated sunlight. Moreover, this composite demonstrated excellent stability, maintaining a degradation rate of 79.67% over 520 min. The enhanced performance is attributed to the large specific surface area of NH 2 -MIL125, as well as the Co 3 O 4 modification, which provides new active sites, enhances light utilization efficiency, accelerates the separation of photogenerated carriers, and facilitates the generation of reactive radicals. This in-situ growth strategy for modifying NH 2 -MIL125 with Co 3 O 4 offers a novel approach to expand the application scope of NH 2 -MIL125 and enhance its performance in toluene degradation. Graphical abstract
Characterization of layered Co 3 O 4 -modified NH 2 -MIL125 catalysts, evaluation of photocatalytic degradation performance of toluene, photogenerated carrier migration, and separation studies.
研究领域:
材料科学
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环境科学
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高影响因子
Microorganisms
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2020
·Vol. 8
·期 3
·319
·
IF 4.152
Xuewei Li,Beibei Li,Shurui Cai,Yu Zhang,Mingjie Xu,Chunmei Zhang,Bo Yuan,Ke Xing,Sheng Qin
Black spot disease, which is caused by the pathogenic fungalCeratocystis fimbriata, seriously affects the production of sweet potato and its quality during postharvest storage. In this study, the preliminary identification of the rhizosphere actinomycete strain SPS-33, and its antifungal activity of volatilesin vitroandin vivowas investigated. Based on morphological identification and phylogenetic analysis of the 16S rRNA gene sequence, strain SPS-33 was identified asStreptomyces lavendulae.Volatile organic compounds (VOCs) emitted by SPS-33 inhibited mycelial growth and sporulation ofC. fimbriatain vitroand also induced a series of observable hyphae morphological changes. In anin vivopathogenicity assay, exposure to SPS-33 significantly decreased the lesion diameter and water loss rate in sweet potato tuberous roots (TRs) inoculated withC. fimbriata. It increased the antioxidant enzymes’ activities of peroxidase, catalase, and superoxide dismutase as well as decreased malondialdehyde and increased total soluble sugar. In the VOC profile of SPS-33 detected by a headspace solid-phase micro extraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS), heptadecane, tetradecane, and 3-methyl-1-butanol were the most abundant compounds. 2-Methyl-1-butanol, 3-methyl-1-butanol, pyridine, and phenylethyl alcohol showed strong antifungal effects againstC. fimbriata. These findings suggest that VOCs fromS. lavendulaeSPS-33 have the potential for pathogenC. fimbriatacontrol in sweet potato postharvest storage by fumigant action.Keywords:Ipomoea batatas(L.) Lam.;Streptomyces lavendulae;volatile organic compound;fumigant;antimicrobial
研究领域:
植物病理学
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微生物学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Xianfeng Li,Jian Wang,Yangyang Guo,Tingyu Zhu,Wenqing Xu
Zeolites have been widely used in the adsorption and removal of volatile organic compounds (VOCs). In this study, we investigated the adsorption properties of 9 commercial zeolites and MCM-41 mesoporous silica for p-xylene. And then zeolites with hierarchical structures were prepared by alkali (0.1–0.8 mol•L −1 mixed alkali solution) modification and their adsorption and desorption properties were investigated for various VOCs. The structure of these materials was thoroughly characterized, and the relationship between the adsorption capacity and physical parameters was investigated. It was found that the pore diameter and Si/Al ratio were the most important parameters for p-xylene adsorption under humid conditions, which should be optimized simultaneously to achieve satisfactory adsorption capacity. And the best adsorption capacity could reach approximately 100 mg•g −1 in humid conditions. Meanwhile, enhancing the diffusion of the VOC molecules in microporous zeolites with micron crystals through the manufacture of hierarchical structure was also important. The adsorption capacity of the modified zeolites increased by more than 25%, and the desorption temperature decreased. It showed that the alkali modification not only improved the utilization efficiency of the adsorption sites, but also facilitated desorption, which is crucial for adsorbing materials.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Food Bioscience
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2024
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IF 4.8
Zhiqiang Yi,Yusen Yue,Jianquan Kan,Zhirong Wang,Sameh Awad,Amel Ahmed Ibrahim,Muying Du
Gastrodia elata Bl. Is susceptible to infestation by the fungus Fusarium oxysporum , which can cause severe post-harvest diseases. This paper presents the findings of an investigation into the control and bacteriostatic mechanisms of Lactobacillus curvatus 2768-VOCs on F. oxysporum -infected G. elata . The results of both in vitro and in vivo tests demonstrated that L. curvatus 2768-VOCs exhibited inhibitory effects against F. oxysporum , with inhibition rates of 63.37% and 44.4%, respectively. The results of the in vivo test also demonstrated that the pre-fumigation approach exhibited superior efficacy compared to direct fumigation, with the former showing a preventive effect. Furthermore, it was discovered that VOCs disrupted the integrity of F. oxysporum cell membranes and altered their permeability, resulting in the leakage of cell contents. The fumigation caused damage to the mycelial structure, accompanied by a notable decline in the total lipid and ergosterol content, and an appreciable increase in MDA content. Moreover, the fumigation of VOCs markedly diminished the activities of ATPase and mitochondrial dehydrogenase, thereby disrupting the respiration of F. oxysporum and its energy metabolism. The VOCs were subjected to GC-MS analysis, which revealed that the relative content of acids was the highest, particularly formic acid and glyoxalic acid. The study offers a theoretical basis for the biological control of postharvest diseases in G. elata .
研究领域:
植物病理学
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微生物学
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药用植物学
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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）