JOURNAL OF ENVIRONMENTAL ENGINEERING
·
2024
·Vol. 150
·期 6
·04024020
·
IF 1.6
Dawei Wang,Tingyue Chen,Yilan Jiang,Xinyang Cai,Yingying Li,Yuanyuan Chen,Guang Yang,Feng Pan
Promoting the Fe(II)/Fe(III) cycle efficiency is of wide interest for the broader applications of the Fenton process in water treatment sector. In this study, the alternating magnetic field (AMF) was employed to accelerate the reduction from Fe(III) to Fe(II). To achieve this purpose, a composite of nano-zero valence iron and NiFe2O4 was fabricated (denoted as Fe@NiFe2O4). Under the optimal reaction conditions, bisphenol A (BPA) was removed completely within 15 min by the Fe@NiFe2O4/H2O2 system in the presence of AMF, while only ∼60% was removed in the absence of AMF. The faster removal rate in the presence of AMF was ascribed to the elevated temperature caused by the inductive heating of Fe@NiFe2O4 (∼41°C according to the simulation). The simulator of the Fenton process was considered to be the leaked Fe(II) from the Fe part of the composite, as an equal concentration of Fe(II) (∼5.7 mg/L) resulted into a similar removal kinetic. However, the system with Fe@NiFe2O4 as the catalyst consumed less H2O2 in this process, indicating its different activation pathway from the conventional Fenton process. Electrochemical analysis confirmed that the AMF can generate the internal electric field within the composite particle. This field may facilitate the reduction from Fe(III) to Fe(II), which further benefitted the Fenton reactions.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Xinglong Zhang,Qia Zhao,Huanhuan He,Caiyan Zhang,Lele Zhao,Baoning Li
The surface acidity and electron transfer performance of manganese oxide catalysts significantly affected its performance of peroxymonosulfate (PMS) activation. In this work, Mn 2 O 3 catalyst was prepared by the precipitation method. The C-hybridization Mn 2 O 3 (Mn 2 O 3 -D) catalyst prepared with disodium oxalate as a precipitant had more Mn 3+ and Lewis acid sites on the surface, promoting the binding of PMS on the catalyst surface, which exhibited the best performance in inducing PMS activation to degrade bisphenol A (BPA). Quenching experiments and in situ electron spin resonance (ESR) results indicated that radicals and singlet oxygen were not the main reactive oxygen species (ROSs) in the advanced oxidation process. The chemical probe experiment of phenylmethylsulfone (PMSO) showed that the ≡ Mn-OOSO 3 - metastable intermediate formed by the binding of PMS with Mn sites on the catalyst surface was important active species for contaminants degradation. Contaminants combined with intermediates on the catalyst surface to form the electron transfer channels, which were directly degraded through oxygen-atom-transfer pathway and single-electron-transfer pathway. And the hybridization of C promoted the electron transfer during this process. This work further elucidated the reaction mechanism of PMS activation by manganese oxides, and proposed new ideas for the design of MnO x catalysts for efficient activation of PMS.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shuxin Wei,Sibo Chen,Hang Yan,Xiaoran Zhang,Xinyue Gao,Zhongli Cui,Yan Huang
A common aromatic and phenolic pollutant, p-nitrophenol (PNP), is widely used in various industry and has serious risk to the environmental health. Biosensors have been extensively employed as an alternative technology for pollutants monitoring. By mining the new sensing elements, more specific biosensors could be characterized for highly sensitive detection. Herein, the PnpR transcription factor was identified to activate the transcription of pnpC1 by binding to P pnpC1 promoter region in P. putida DLL-E4, and PNP was recognized as its specific inducer. The PnpR-based biosensor for detection of PNP was developed, demonstrating adequate sensitivity in a liquid solution with satisfactory specificity. The biosensor was optimized by adopting a transcriptional amplifier, which increased the maximum output by 149-fold, and improved the detection limit by 100-fold, from 1 mg/L to 10 μg/L. These biosensors had a linear range of 5–80 mg/L and 0.01–1.0 mg/L for PNP determination, respectively. Then, the agarose gel entrapment-based biosensor was constructed and allowed a good of PNP detection in the range of 5–60 mg/L in M9 solid agar within 70 min, and a detection sensitive of 16.8 mg/kg in soil. The good performance of the biosensor suggested its potential application of high-efficient and on-site detection in environmental matrices.
研究领域:
环境科学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2022
·
IF 4.198
Shaofeng Wu,Furong Geng,Jianyu Dong,Long Liu,Yongbo Zhou
The ubiquity of benzoxazoles in natural products, drugs, and functional materials has stimulated numerous efforts toward their synthesis; however, the developed methods rely on prefunctionalized substrates and lack generality. Under metal-free conditions, a highly general synthesis of benzoxazoles direct from abundant and easily available phenols and amines is developed via a modular phenol functionalization controlled by TEMPO. In the reaction, various phenols and primary amines with a broad range of functional groups are compatible, producing structurally and functionally diverse benzoxazoles (64 examples) without or with trace observation of the byproducts of phenol transformation with amines. The practical synthesis, especially for drug tafamidis, demonstrates decisive advantages in generality, selectivity, efficiency, and atom- and step-economies over traditional methods, even in the cases of low yields. Mechanistically, the radical adducts of TEMPO with ortho-cyclohexa-2,4-dien-1-one radicals rather than the well-recognized cyclohexa-3,5-diene-1,2-diones may serve as intermediates.
研究领域:
有机化学
·
药物化学
·
材料化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Dandan Zhu,Qixing Zhou
In this study, a series of NCN/BiWO (NCN = N-doped graphitic carbon nitride , BiWO = Bi 2 WO 6 ) were fabricated successfully, which were characterized by XRD, TEM, FTIR, BET, UV–vis spectrometry, XPS and PL. Under visible light irradiation, the optimum mass ratio of 60 % NCN/BiWO could reach 93.1 % removal efficiency of phenol within 5 h, which was about 6.9 times as that pure Bi 2 WO 6 . And the degradation rate constant of 60 % NCN/BiWO (2.6726 min -1 ) was about 18.5 times as that of pure Bi 2 WO 6 (0.1442 min -1 ). According to the result of UV–vis absorption spectra, VB-XPS spectra and photoelectrochemistry performance, the photocatalytic mechanism of 60 % NCN/BiWO was revealed, indicating that the narrow band gap of 60 % NCN/BiWO is the main factor on the high photocatalytic activity . The stable and recyclable properties also were done, showing highly suitable for practical application.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Micro & Nano Letters
·
2020
·Vol. 15
·期 7
·469-473
·
IF 0.975
Meiling Yang,Mingwang Liu,Zipeng Wu,Yu He,Yili Ge,Gongwu Song,Jiangang Zhou
A facile method for fabricating polymer carbon dots (PCDs) with characteristic dual-emission at 570 and 620 nm by 1,8-naphthalenediol in n-propanol solvents was designed. The synthesised PCDs possessed fluorescence enhancement performance toward the water in organic solvents. Based on this peculiar phenomenon, a highly efficient fluorescent probe for water detection in organic solvents such as N,N-dimethylformamide, dimethyl sulfoxide and n-propanol was established with a wide detection range from 0 to 50%. The probe can also be utilised to determine water content in other organic solvents. The practical application was explored by studying the response of PCDs toward the water in various spirit samples. This method may offer a new way of detecting water in organic solvents by PCDs.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL ENGINEERING
·
2020
·Vol. 146
·期 4
·04020019
·
IF 1.264
Junru Bu,Xinkai Zhou,Huan Liu,Chunmian Lin
The roles of H2O2 in supercritical water oxidation (SCWO) were investigated. The results showed that some of the H2O2 could persist for a short time in SCW, and organic pollutants were mainly oxidized by the O2 generated from the H2O2 in SCWO. However, the introduction of Fe2+ into the SCWO system with H2O2 formed a new Fenton oxidation environment, i.e., supercritical Fenton oxidation (SCFO), which showed the cooperative effect of Fenton oxidation and SCWO. Comparative experiments of phenol and p-aminophenol (PAP) in SCWO and SCFO, respectively, were carried out. The results showed that, in the SCFO system, the CO2 yield from the oxidative degradation of phenol-simulated wastewater (766.0 mg/L) in 45s could reach 73.3%, much higher than that in the SCWO (49.2%) under the same conditions. After 8 min, the CO2 yield in SCFO (97.4%) was also significantly higher than that in SCWO (89.4%). The degradation efficiency of PAP-simulated wastewater (272.5 mg/L) in the SCFO system exceeded 94.3%, especially under acidic conditions, and the degradation efficiency reached 97.4%, much higher than that in the SCWO system (86.2%).
研究领域:
环境工程
·
化学工程
·
水处理技术
·
高级氧化工艺
·
污染控制
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Wei Song,Ji Li,Zhuoyue Wang,Caixia Fu,Xiaolei Zhang,Jianpei Feng,Zhiliang Xu,Qi Song
The degradation efficiency of bisphenol A (BPA) was investigated in the process of persulfate (PS) coupled with dithionite (DTN) as a function of concentration of BPA, PS, DTN and solution pH. A simple response surface methodology (RSM) based on central composite design (CCD) was employed to determine the influence of individual and interaction of above variables and the optimum processing parameters. It is satisfactory of a quadratic model with low probabilities (<0.0001) at a confidence level of 95% to predict the BPA degradation efficiency. The model was well fitted to the actual data and the correlation coefficients of R 2 and R 2 -adj were 0.9270 and 0.8885, respectively. In addition, the obtained optimum conditions for BPA degradation were 1.79 μM, 131.77 μM, 93.64 μM for BPA, PS, DTN and pH = 3.62, respectively. It achieved a degradation efficiency >90% within 150 min. Moreover, the trapping experiment of active species demonstrated that SO 4 ·- and ·OH were the dominant species and natural water matrix showed an obvious inhibition effect on BPA degradation. The BPA degradation pathway was predicted based on GC-MS results in this study.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Environmental Technology & Innovation
·
2022
·
IF 7.758
Chen Yu,Jingchun Tang,Hongji Su,Jingci Huang,Fangheng Liu,Lan Wang,Hongwen Sun
In this study, algae of Aegagropila linnaei (AL) was selected as low-cost raw material to synthesize biochar/iron oxide composites for the removal of bisphenol-A (BPA). Pristine biochar (BC) with olive-shaped pores and KOH-activated acid washed biochar (ABC) with novel interconnected structure were successfully prepared and further functionalized with ferrous sulfate for effective soldering of Fe 3 O 4 nanoparticles onto the surface of acid biochar through hydrothermal method. The iron modified acid biochar composite (FABC) was found to be with the optimal physicochemical property such as smaller crystalline size (100–150 nm), larger surface area (144.62 m 2 /g), larger pore volume (0.259 cm 3 /g), lower capacitance decrease (2.3%), and lower resistance (0.73 Ω ) as compared to other modified biochar. The removal rates of BPA by BC, ABC, and FABC were 43.2 ± 0.5%, 52.6 ± 0.3%, and 69.8 ± 2.3%, respectively, when the concentration of BPA was 10 mg/L (pH 3.0, 303k). Under acidic conditions (at pH 3.0), the reaction activity and the adsorption of hydrogen ions onto Fe 3 O 4 nanoparticles in FABC was prompted, and further increasing the removal rate of BPA. The result suggests that adsorption played main role, while active species ( ⋅ OH and ⋅ O 2 − ) produced by the nano-iron oxide on the surface of the composites played some effect in the removal of BPA.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 47
·e53178
·
IF 3.057
Fenghua Li,Man Liu,Dexiang Yan,Zonggong Yin,Jiahong Xiao,Bin Sun,Yuhong Shen,Tingting Gao,Qinze Liu,Guowei Zhou
With the current situation of high-energy consumption and high pollution in the textile industry, developing an eco-friendly and universal dyeing technology is urgently required. Towards this goal, in this study, the dyeing technology with room temperature, salt-free, zero release, and rapid cycle dyeing for 20 min was realized using a polymer of catechol and polyethyleneimine as a dye. The dyed fabrics exhibited washing, rubbing, and perspiration fastness characteristics for practical needs, mainly attributing to the hydrogen bonding and π–π interaction between the dye molecules and the fabrics. Benefiting from the unique dyeing technology, the dyed fabrics show excellent leveling properties and adjustable chromaticity. Importantly, the mussel-inspired coating strategies are universally applicable, so the dyeing technology can be applied to various fabrics. Consequently, the environmentally friendly dyeing process based on low-cost catecholamine polymers as a dye will have a broad application prospect in the printing and dyeing industry. Moreover, the antibacterial tests showed that dyed cotton cloth, mulberry silk, and polyester fabrics all have favorable antibacterial properties, especially dyed mulberry silk fabrics have a greater than 90% bacterial reduction rate for both Escherichia coli and Staphylococcus aureus .
研究领域:
纺织科学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Food Analytical Methods
·
2022
·Vol. 15
·期 7
·2036-2047
·
IF 3.498
Gao Ming,Wang Hui,Wang Jun,Wang Xuedong,Wang Huili
Herein, we developed an effervescent reaction-enhanced dispersive liquid–liquid microextraction method for the preconcentration/extraction of bisphenols (BPs) in milk and milky tea samples. This microextraction method was based on the utilization of acidic ionic liquid (AIL) and in situ metathesis reaction (AI-EDLM). Compared to the traditional imidazolium-based ionic liquid, AIL can not only be used as an extractant, but also as an acidic source in the effervescent reaction. Under such a case, it can avoid the use of additional acidic source and also achieve a rapid dispersion effect due to vigorous CO 2 bubbles, which simplify the experimental procedures and decrease the preparation cost of effervescent tablets. By employing the one-factor-at-a-time approach, the main parameters were optimized as follows: 400 mg of [BMIM][HSO 4 ] as extractant, 100 mg of Na 2 CO 3 as alkaline source, 400 mg of Li[NTf] 2 as the ionic-exchange reagent, 4% of NaCl, 5 min of centrifugation and 1.5 mL of ether as the elution solvent. Under optimized conditions, the limits of detection ranged from 0.12 to 0.32 μg L −1 , and the extraction recoveries for BPA, BPB, and BPAF spanned the range of 85.7–106.2% in five kinds of milk samples. Therefore, the AIL ([BMIM][HSO 4 ]) played dual roles, i.e., extractant and pH regulator, in the AI-EDLM procedures. Overall, this proposed method is simple, quick, and environment-friendly with low detection limits and high recoveries for BPs, and thus has excellent application value in the sample pretreatment field in milk and milky tea samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2020
·
IF 4.972
Li-Ping Peng,Chuan-He Tang
This work reports a kind of novel antioxidant Pickering high internal phase emulsions (HIPEs; with an oil fraction, ϕ > 0.74) stabilized by soy β -conglycinin ( β -CG) and polyphenol complex nanoparticles, as outstanding protective containers for lipophilic nutraceuticals. The nanoparticles with a representative polyphenol ((-)-epigallocatechin-3-gallate; EGCG) encapsulated were fabricated through an ethanol-mediated dissociation and re-assembly process of β -CG, with greater particle size and higher surface hydrophilicity observed at higher initial EGCG concentrations. Using these co-assembled nanoparticles as sole stabilizers, a kind of HIPE gels with similar gel stiffness and microstructure, could be easily fabricated at ϕ = 0.8 and a protein concentration in the aqueous phase of 1.0 wt% using polyunsatuated fatty acid-rich flaxseed oil as the dispersed phase. These HIPE gels were extraordinarily stable against heating or long-term storage, but susceptible to freeze-thawing. The as-fabricated HIPEs showed an excellent protection to β -carotene (encapsulated in oil phase) against heating, as well as an inhibition of lipid oxidation. The oxidation protection was in an EGCG concentration dependent manner. The results would be of interest for providing a novel strategy to fabricate functionalized Pickering HIPEs as potential containers or delivery systems for lipophilic nutraceuticals.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）