Scientific Reports
·
2025
·Vol. 15
·期 1
·1-11
·
IF 3.9
Wang Peng,Han Lifang,Zou Hua,Cao Yiyao,Gao Xiangjing,Ren Hong,Xu Qiuliang
We explored the feasibility of using urinary metabolites of p-chloronitrobenzene (p-CNB) as exposure biomarkers of occupational p-CNB exposure. Forty-two workers exposed to p-CNB during their jobs at a chemical enterprise in Shaoxing, Zhejiang Province, China were included in the exposure group, while administrative personnel who do not come into contact with p-CNB at work were included in the control group. Each worker in the exposure group was equipped with a personal air sampler to collect airborne p-CNB samples, and urine samples were collected at the conclusion of each shift. After sample collection, the airborne p-CNB concentrations and urinary metabolite concentrations were detected by gas chromatography-tandem mass spectrometry and ultra-performance liquid chromatography - quadrupole - orbitrap high resolution mass spectrometry, respectively. The urinary metabolite concentrations were corrected by the content of urinary creatinine. Subsequently, the correlations between the urinary metabolite concentrations and the p-CNB time-weighted average (TWA) concentrations were assessed using correlation analysis. All p-CNB TWA concentrations measured in this study were below the occupational exposure limit in the Chinese national standards. In the exposure group, N-acetyl-S-(4-nitrophenyl)-L-cysteine (NANPC), 2-chloro-5-nitrophenol (2C5NP), p-chloroacetanilide (p-CAA), p-chlorooxanilic acid (p-COA), 2-amino-5-chlorophenol (2A5CP), and p-chloroaniline (p-CA) were detected at varying levels. The percentages of NANPC, 2C5NP, p - CAA, p - COA, 2A5CP, and p - CA were 64.1%, 5.1%, 0.3%, 15.1%, 5.1%, and 10.3%, respectively. We found extremely significant positive relationships ( p < 0.01) between the urinary metabolite concentrations (p-CA, 2C5NP, 2A5CP, NANPC, and p-COA) and the p-CNB TWA concentrations, with respective correlation coefficients of 0.827, 0.673, 0.790, 0.714, and 0.741. Thus, these five metabolites may be used as exposure biomarkers of occupational p-CNB exposure. Moreover, among these metabolites, NANPC was identified as the most suitable exposure biomarker because it had the highest correlation coefficient and the highest content in urine.
研究领域:
职业卫生
·
毒理学
·
环境医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 7
·3879-3886
·
IF 1.093
Liu Baoliang,Yang Bing,Sun Meiyu,Qian Xiangli,Zhang Qikun
In this study, a Pt loaded active carbon fiber (Pt/ACF) catalyst was prepared by immobilizing Pt nanoparticles on ACF. The catalyst accelerated hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline (p-CA) at lower temperature and atmospheric pressure,
resulting in approximately 100% yield and selectivity. Several factors that affect p-CA yield were investigated. The nitro reduction rate reached 100% under the optimal reaction conditions, indicating excellent selectivity of the prepared catalyst. This process will overcome the environmental
pollution problems associated with the traditional process, and is a green synthetic process.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 33
·19247-19253
·
IF 3.119
Ying Han,Junkai Huang,Hongyuan Liu,Yue Wu,Zhao Wu,Kemin Zhang,Qingjie Lu
The reduction of p-chloronitrobenzene (p-CNB) by sulfate green rust (GRSO4) was systematically studied. The results revealed that GRSO4 has a good removal effect on p-CNB. The removal efficiencies of p-CNB by GRSO4 improved with the increase of the pH value. The removal efficiencies in the presence of ions were better than that of GRSO4 alone, while natural organic matter (NOM) could adsorb p-CNB, which competed with GRSO4. The reductions of p-CNB by GRSO4 under different conditions followed pseudo-first-order reaction kinetics except for the reactions in the presence of NOM. p-CNB was converted into p-chloroaniline (p-CAN), which produced p-nitrosochlorobenzene and p-chlorophenylhydroxylamine as the intermediate products. The results of the X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed GRSO4 was gradually transformed into goethite. Fe(II) in the GRSO4 structure was the main electron donor involved in the reaction.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Xiaoxiang Cheng,Heng Liang,Fangshu Qu,An Ding,Haiqing Chang,Bin Liu,Xiaobin Tang,Daoji Wu,Guibai Li
Mn oxide incorporated membranes were fabricated by incorporation of MnO 2 particles prepared using different methods (C-MnO 2 , M-MnO 2 and S-MnO 2 ) on the surface of ceramic ultrafiltration membranes. Initially, the physicochemical properties of prepared MnO 2 particles were systematically analyzed, and S-MnO 2 exhibited the best dispersibility and smallest particle size. Scanning electron microscopy and atomic force microscopy analyses demonstrated that the morphologies and topographies of the fabricated membranes were significantly affected by the preparation method of MnO 2 particles. Subsequently, sodium alginate was employed to investigate the antifouling properties of the fabricated membranes. Although the incorporation of MnO 2 particles increased membrane intrinsic resistance to varying degrees, M-MnO 2 and S-MnO 2 apparently mitigated both reversible and irreversible fouling in the presence of ozone, whereas C-MnO 2 exerted a minor influence. Further, p -chloronitrobenzene was used to study the activity of fabricated membranes in catalytic ozonation. C-MnO 2 , M-MnO 2 and S-MnO 2 incorporated membranes exhibited enhanced activities with the removal efficiencies of 51.7%, 61.5% and 68.0%, respectively. The results indicated that the preparation method of S-MnO 2 was most appropriate for the preparation of highly dispersive MnO 2 particles to incorporate with ceramic membranes. Results in this study contribute to the fabrication of Mn oxide incorporated membranes with an efficient and convenient way, and provide relevant information on their actual application.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2015
·Vol. 145
·期 3
·784-793
·
IF 2.307
Zhang Xuejun,Zhang Peipei,Yu Hongbo,Ma Zhen,Zhou Shenghu
Abstract Bimetallic PdM (M = Ni, Co, Fe) nanoparticles were synthesized using butyllithium as a reductant, and were used to prepare Pd–M
x
O
y
/KIT-6 catalysts by appropriate oxidation and reduction treatments. These catalysts showed higher selectivity in the hydrogenation of p -chloronitrobenzene to p -chloroaniline than Pd/KIT-6. Relevant characterization was conducted using X-ray diffraction, transmission electron microscopy, N 2 adsorption–desorption, X-ray photoelectron spectroscopy, inductive coupled plasma emission spectrometer, and H 2 temperature-programmed reduction. Graphical Abstract
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2017
·Vol. 24
·期 19
·16220-16227
·
IF 2.741
Xu Xiangyang,Gao Xinyi,Jin Jie,Vidonish Julia,Zhu Liang
A novel laboratory-scale bioelectrode and anaerobic sludge coupled system was established for the enhancement of p -chloronitrobenzenes ( p -ClNB) reductive transformation with addition of magnetite nanoparticles. In this coupled system, the bioelectrodes were supplied with a voltage of 0.8 V and the amount of magnetite nanoparticles was set at 7.4 mL/400 mL. Results showed that high p -ClNB transformation rate of 0.284 h −1 and high p -chloroaniline ( p -ClAn) dechlorination rate of 0.082 h −1 were achieved in the coupled system at p -ClNB initial concentration of 30 mg L −1 , and p -ClAn is one of the reductive products of p -ClNB. The cyclic voltammetry curve showed that when the potential was −1000 mV, the magnetite-biocathode current was about 10.7 times of the abiotic cathode. Also, a shift in the reductive peak potential and a dramatic increase in reductive peak current were observed. These findings suggest that magnetite nanoparticles could enhance the electrocatalytic activity and may act as electron conduits between microorganisms or between electrodes and microorganisms to promote the extracellular electron transfer.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TRANSITION METAL CHEMISTRY
·
2020
·Vol. 46
·期 1
·37-47
·
IF 1.366
Guo Leilei,Wang Quanxiu,Shi Qingqing,Guan Ruolin,Zhao Liping,Yang Hanmin
In this study, the shape-controlled synthesis of ruthenium (Ru) nanostructures was examined using microwave irradiation. Dendritic Ru nanostructures, with an average diameter of about 34.7 nm, were successfully synthesized when ruthenium chloride (RuCl 3 ) was reduced using a reducing agent of benzyl alcohol, in the presence of polyvinylpyrrolidone (PVP) under microwave irradiation for 360 s. By examining selected parameters affecting the shape-controlled synthesis of dendritic Ru nanostructures, i.e., the concentration of the RuCl 3 precursor, different reducing agents, molecular weight of PVP and the molar ratio of RuCl 3 /PVP, were identified as key factors affecting the successful synthesis of dendritic Ru nanostructures. The catalytic performance of obtained dendritic Ru nanostructures was evaluated for hydrogenation of p-chloronitrobenzene (p-CNB). High selectivity to p-chloroaniline (p-CAN) of about 99.58% was obtained using dendritic Ru nanostructure catalysts at 80 °C under 1 MPa hydrogen pressure, having a 72.81% conversion rate of p-CNB. The selectivity to p-CAN with a dendritic Ru nanostructure catalyst is notably higher than that of conventional 5% ruthenium/carbon catalysts (62.12%). Here in we demonstrate that synthesized dendritic Ru nanostructures present a promising catalytic performance in the hydrogenation of p-CNB, having potential applicability to a wide range of catalytic reactions.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2013
·
IF 4.814
Xiangdong Wang,Hongbo Yu,Dayin Hua,Shenghu Zhou
PtM (M = Ni, Fe, Co) alloy nanoparticles were synthesized by a liquid phase reduction method employing butyllithium as a reducing agent. The alumina-supported PtM materials were then used as precursors to obtain the Pt-MxOy/Al2O3 catalysts through calcination. The influence of synthesis conditions of PtM alloy nanoparticles and the catalytic performance of the Pt-MxOy/Al2O3 catalysts for p-chloronitrobenzene hydrogenation reaction were investigated. The relevant characterizations such as XRD, XPS, and TEM were conducted for PtM alloy nanoparticles and Pt-MxOy/Al2O3 catalysts, and the result showed that the PtM nanoparticles are uniform alloy. Moreover, compared to PtM alloy nanoparticles, the Pt particle size of Pt-MxOy/Al2O3 using PtM alloy nanoparticle precursors did not increase by calcination, indicating good thermal stability. The catalytic activities of Pt-MxOy/Al2O3 for p-chloronitrobenzene hydrogenation reaction were significantly higher than that of control Pt/Al2O3 catalysts due to its strong Pt-MxOy interaction.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Jun Gao,Ping He,Tiantian Yang,Xuejiao Wang,Lianhong Zhou,Qihang He,Lingpu Jia,Hongquan Deng,Hui Zhang,Bin Jia,Xiaochun He
Constructing a sensitive voltammetric platform to analyze highly toxic organic pollutant p-chloronitrobenzene (p-CNB) is highly desirable in environmental monitoring. Herein, a composite consisting of nickel-based metal-organic framework (Ni-MOF) and graphene oxide (GO) was successfully prepared by facile and cost-efficient chemical precipitation , and it was further used as a modified material to develop an electrochemical sensor for p-CNB. Electrochemical properties of as-prepared sensor were investigated by electrochemical impedance spectroscopy , cyclic voltammetry and differential pulse voltammetry . As a result, the composite sensor showed superior electrocatalytic performance towards the oxidation of p-CNB in a concentration range of 0.10–300.0 μM, and the detection limit was 8.0 nM (S/N = 3). Furthermore, as-prepared Ni-MOF/GO composite based sensor exhibited favorable reproducibility, durable stability and prominent selectivity. The practicability of the sensor was evaluated by detecting p-CNB in real tap water samples and satisfactory recovery rates were obtained, revealing its potential application for detection of p-CNB in water environment.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Shuo Li,Xianlang Chen,Jing Wang,Nan Yao,Jianguo Wang,Jie Cen,Xiaonian Li
The reduction of the size and modification the surface of Ni 0 are generally used to improve the hydrogenation performances of Ni-based catalysts. In this work, a new method derived Ni 0 @carbon nanostructure was constructed on SiO 2 in order to explore an alternative way to improve the intrinsic activity of Ni 0 in the selective hydrogenation of p-chloronitrobenzene ( p -CNB). The experimental and computational results exhibit that the synergistic effect between Ni 0 core and nitrogen-doped carbon shell (Ni 0 @C-N) can dissociate more hydrogen on larger Ni 0 core (~14 nm) than Ni 0 @C (Ni 0 ≈ 11 nm), while the external surface of carbon shell facilitates the oblique adsorption of p -CNB and the consequent hydrogenation. Such formed dual-reaction surfaces inhibit the dechlorination reaction but increase the active hydrogen species. Consequently, Ni 0 @C-N/SiO 2 catalyst (~14 nm) adversely displays ~2.3-fold higher turnover frequency and ~100% p -chloroaniline selectivity , in contrast to Ni 0 @C/SiO 2 (~11 nm) and the commercial Raney Ni (~6 nm) catalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Xiuli Li,Yuan Tan,Zongyang Liu,Juan Su,Yan Xiao,Botao Qiao,Yunjie Ding
Chemoselective hydrogenation of aromatic nitro compounds to the corresponding anilines is an environmentally benign technology for the production of key intermediates in manufacturing of pharmaceuticals, agrochemicals, dyes and fine chemicals. Non-noble metal Cu-based catalysts have been reported as a low-cost alternative but suffer from poor activity. Herein, by fabricating nickel oxide promoted Cu catalysts, a promoted activity was obtained in supported Cu-Ni bimetal catalyst system. Characterizations such as H 2 -TPR and XPS indicate a strong interaction between Cu and Ni, which contributes to its high activity and selectivity in hydrogenation of p -chloronitrobenzene ( p -CNB) to p -chloroaniline ( p -CAN). Control experiments suggest that either monometallic copper or pure nickel oxide is less active for the reaction but the interaction of NiO x with Cu generates much more active species, resulting in significantly improved catalytic reactivity and selectivity. The activity was found to be highly dependent on the contents of Cu 0 & Cu + in Cu-Ni bimetal catalyst, as the specific reaction rates for hydrogenation of p -CNB grew linearly with the increment of Cu 0 & Cu + loadings. Kinetic studies and in-situ DRIFTS of p -CNB imply the 10Cu-5Ni/AlSBA-R catalyst possesses good capacity for the activation of hydrogen and nitro group, leading to high p -CNB conversion and p -CAN production. The present work provides a good example for understanding the interaction between Cu and nickel oxides, and helps to develop highly efficient non-noble metal catalysts for selective hydrogenation of aromatic nitro compounds to corresponding anilines.
研究领域:
催化化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Shuo Li,Nan Yao,Lulu Fan,Zhengjia Li,Linyan Yang,Jie Cen,Xiaonian Li
How to break the activity-selectivity dependence in halonitrobenzene hydrogenation remains a challenge. In this work, Ni@C N/SiO 2 were synthesized and examined in the hydrogenation of p -chloronitrobenzene. It showed that the electron transferred from nitrogen doped carbon shell to Ni 0 core (core–shell synergistic effect) dominated the intrinsic activities of Ni@C N/SiO 2 with dual-reaction surfaces (H 2 dissociated on Ni 0 core, while p -chloronitrobenzene was hydrogenated on carbon shell) in the thiophene-free hydrogenation, leading to their higher turnover frequencies than Raney Ni catalyst. During the thiophene-involved hydrogenation, the adsorption of thiophene on Ni 0 changed its electron density and blocked the active sites. These enhanced the selectivity, but significantly reduced the activity for Raney Ni catalyst. Comparatively, the carbon shell protected Ni 0 core from thiophene adsorption so that the hydrogen dissociated on Ni 0 as usual. However, the adsorption of thiophene on the carbon shell reduced the available sites for p -chloronitrobenzene adsorption. Although Ni@C N/SiO 2 had lower activities in the thiophene-involved reactions than those of thiophene-free reactions, they achieved ∼100 % p-chloroaniline selectivities and 8-fold higher turnover frequencies than Raney Ni, breaking the activity-selectivity dependence. This reveals that the available sites on the carbon shell and the core–shell synergistic effect determine the thiophene-involved hydrogenation activities of Ni@C N/SiO 2 catalysts.
研究领域:
催化化学
·
材料科学
✓ 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）