PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2015
·
IF 2.551
Guibin Lu,Caixing Zhang,Liping Chen,Wanghua Chen,Ting Yang,Yishan Zhou
To study the thermal hazard of β-nitroso-α-naphthol, both dynamic and isothermal tests were performed with a differential scanning calorimeter (DSC). The dynamic tests indicated that the initial decomposition temperature of β-nitroso-α-naphthol ranged from 153 °C to 173 °C. The interrupt-rescanning method verified the autocatalytic characteristic of β-nitroso-α-naphthol decomposition. DSC curves obtained at five constant temperatures confirmed that the decomposition of β-nitroso-α-naphthol was an autocatalytic reaction. Activation energy E was 149 ± 8 kJ mol −1 calculated by Kissinger method. E values calculated by induction period method and isothermal method were in line with that obtained by Friedman method. On the basis of the kinetic analysis, the safety parameter SADT of β-nitroso-α-naphthol in 50 kg standard packaging was 81 °C based on Semenov model and 67 °C based on Frank-Kamenetskii model.
研究领域:
化学动力学
·
热安全分析
✓ 已验证
DOI
高影响因子
CHROMATOGRAPHIA
·
2016
·Vol. 79
·期 5
·327-333
·
IF 1.332
Peng Xiaofeng,Wang Huawen,Yang Binbin,Zhan Xin,Wu Yiwei
To improve the sensitivity of capillary electrophoresis, field-amplified sample injection (FASI) was developed to determine bisphenol A (BPA), α -naphthol ( α -NAP) and β -naphthol ( β -NAP) in drinks and lake water. Parameters (sample matrix, concentration of NaCl, water plug length, sample injection time and voltage) affecting FASI have been systematically investigated. Under optimum conditions, the sensitivity was improved 17.1-, 15.8- and 9.9-fold for BPA, α -NAP and β -NAP, respectively. The detection limits of BPA, α -NAP and β -NAP were 0.071, 0.038 and 0.081 μg mL −1 and the proposed method has been successfully applied to detect BPA, α -NAP and β -NAP in drinks and lake water with recoveries of 82.0–109.3 %.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 4.446
Songyan Qin,Xiaolong Liu,Wujuan Lv,Jie Hu,Xin Huang,Lixin Zhao
This study describes the degradation of α-naphthol by magnetic biogenic manganese oxides (M-BMnOx) prepared using Pseudomonas putida strain QSY-1 and magnetic nanoparticles (MNPs) added to the medium. The influence of various reaction parameters, such as pH, temperature, and initial α-naphthol concentration, was systematically investigated. Based on a complete process dynamics model and the initial kinetic analysis, the degradation rate of M-BMnOx was shown to be faster than that of biogenic manganese oxides (BMnOx). The α-naphthol removal rate during the recycling of M-BMnOx also reached 100 % within the fourth cycle. The reaction pathway of α-naphthol was determined. Analyses of the α-naphthol degradation solution showed that M-BMnOx have superior removal efficiency compared with that of BMnOx, which makes it a potentially reliable technique for degrading high concentrations of α-naphthol wastewater.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2021
·Vol. 413
·期 11
·3017-3026
·
IF 4.157
Ren Zixuan,Zhou Xingchen,Gao Xingxing,Tan Yan,Chen Huaying,Tan Songwen,Liu Wenfang,Tong Yaonan,Chen Chuanpin
The long-term consumption of food with pesticide residues has harmful effects on human health and the demand for pesticide detection technology tends to be miniaturized and instant. To this end, we demonstrated the first application of indirectly detecting two carbamate pesticides, metolcarb and carbaryl, by gold nanoparticle–modified indium tin oxide electrode in dual-channel microchip electrophoresis and amperometric detection (ME-AD) system. m -Cresol and α -naphthol were obtained after pesticide hydrolysis in alkaline solution, and then separated and detected by ME-AD. Parameters including the detection potential and running buffer concentration and pH were optimized to improve the detection sensitivity and separation efficiency. Under the optimal conditions, the two analytes were completely separated within 80 s. m -Cresol and α -naphthol presented a wide linear range from 1 to 100 μM, with limits of detection of 0.16 μM and 0.34 μM, respectively (S/ N = 3). Moreover, the reliability of this system was demonstrated by analyzing metolcarb and carbaryl in spiked vegetable samples. Graphical abstract
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Tao Zhang,Shiyao Hou,Xiaomin Huo,Haiming Li,Haiqiang Shi,Xing Wang,Changbin Liu,Yanzhu Guo
In this study, yellow emissive lignin-based carbon dots (Y-CDs) were successfully prepared through a synergistic approach to adjust its surface and carbon core states. The lignin was initially effectively oxidized and carboxymethylated to impart abundant −COOH onto the precursor, which eventually adjusts the surface state of the CDs. Subsequently, α-naphthol was employed during the solvothermal treatment of lignin with the aim of elevating the sp2 domain content in the CDs and, thus, adjusting its carbon core state. The obtained Y-CDs possessed abundant carboxyl groups and nanoscale spherical shape with an average diameter of 5.21 nm. Meanwhile, the energy gap of Y-CDs was 2.46 eV and the optimal emission wavelength was 561 nm under the excitation wavelength of 410 nm. Synergistic adjusting carbon core and surface of the Y-CDs would alter the surface charge distribution and promote the delocalization of π electrons, and thus lead to a red shifting with the emission wavelength of 154 nm. Furthermore, a shape memory film with excellent recovery performance and fluorescent properties was designed by embedding the Y-CDs into polyvinyl alcohol (PVA) polymer. The incorporation of Y-CDs could impart the film with considerable high-value applications in the fields of intelligent sensing, biomedicine, and tissue engineering.
研究领域:
材料科学
·
纳米技术
·
化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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