CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yuan-Yuan Cui,Hu-Bo Ren,Cheng-Xiong Yang,Xiu-Ping Yan
Development of energy-saving and rapid strategies to synthesize novel porous materials for efficient adsorption and removal of environmental pollutants is of great challenge and interest either in environmental science or in chemistry. Here we report a facile room temperature stirring method for rapid synthesis of microporous organic networks (MONs) with large surface area, excellent hydrophobicity, good thermal and solvent stabilities for efficient adsorption and removal of a typical brominated flame retardant tetrabromobisphenol A (TBBPA) from aqueous solution. The adsorption kinetics, isotherms and thermodynamics, effects of pH, ionic strength, humic acid, regeneration and reusability of MONs for TBBPA were studied in detail. The adsorption of TBBPA on MONs followed the pseudo-second-order kinetic and Langmuir adsorption models. Rely on the good π-π and hydrophobic interaction between MONs and TBBPA, a maximum adsorption capacity of 227.3 mg g −1 was realized, which is the largest adsorption capacity for TBBPA among all the reported sorbents up to date now. The large adsorption capacity, rapid adsorption kinetics, good stability and reusability make MONs a highly potential adsorbent for TBBPA removal from aqueous solution. This work may also promote the synthesis and application of MONs in pollutants’ removal.
研究领域:
环境化学
·
材料科学
·
污染控制
·
吸附科学
·
水处理技术
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 20
·8793-8800
·
IF 1.821
Xiaohuan Zang,Qingyun Chang,Mengying Hou,Chun Wang,Zhi Wang
Graphene grafted magnetic microspheres were prepared and used as the adsorbent for magnetic solid phase extraction (MSPE) of bisphenol A and triclosan from water samples prior to their determination by gas chromatography-mass spectrometric (GC-MS) detection. A new customized ground-glass stoppered conical flask with a side tube was used for MSPE operations to simplify the separation of the magnetic adsorbent from the sample solution. The main experimental factors affecting the extraction recoveries of the analytes including the amount of adsorbent, pH of the sample solution, extraction time, salt concentration, desorption conditions, and derivatization conditions were investigated. Under the optimal conditions, a linear response was observed in the concentration range of 0.05–2.50 μg L−1 for bisphenol A and 0.10–5.00 μg L−1 for triclosan. The limits of detection (S/N = 3) were 10.0 ng L−1 for bisphenol A and 20.0 ng L−1 for triclosan. The established method was applied to the determination of bisphenol A and triclosan residues in environmental water samples with satisfactory results. The recoveries of the analytes using this method from lake, river, bottled and tap water samples were in the range from 93.9% to 104.3% (intra-day), and from 93.5% to 99.5% (inter-day) with the relative standard deviations varying from 2.1% to 5.8% (intra-day), and from 3.1% to 5.7% (inter-day).
研究领域:
环境分析化学
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环境监测
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污染物检测
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样品前处理
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分析化学
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2012
·Vol. 14
·期 11
·3204-3210
·
IF 6.32
Jing Wang,Zhengping Liu
Herein we report the novel use of ionic liquid (IL)/zwitterion (ZI) as a reaction medium for the efficient synthesis of polysulfones (PSFs) with high molecular weight and high yield. The results showed that ZI can significantly improve the solubility of 2,2-bis(4-hydroxyphenyl) propane (bisphenol A), and an intermediate sulphonic-type IL with high acidity was formed by ZI and bisphenol A, resulting in 80% reduction in dehydration time compared with conventional methods.
研究领域:
高分子化学
·
材料科学
·
有机合成
·
功能材料
·
绿色化学
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 82
·期 4
·704-714
·
IF 1.638
Sun Jie,Xia Guotong,Yang Wenjin,Hu Yue,Shen Weibo
The radical generation properties of hydrogen peroxide and persulfate for phenol degradation were investigated under microwave irradiation using copper-doped silicon carbide (Cu/SiC) composites as catalyst. The results showed that 90% and 70% of phenol and total organic carbon (TOC), respectively, were removed within 7 min. Microwave activation of hydrogen peroxide and sodium persulfate in terms of thermal effects and accelerated electron transfer was analyzed by degradation kinetics and X-ray photoelectron spectroscopy (XPS). The microwave activation of Na 2 S 2 O 8 demonstrated that the hot spots promote decomposition of persulfate more rapidly and the rate of persulfate decomposition was more than three times the activation rate of a normal heating method. There is a synergistic effect between Cu and microwave radiation, which is highlighted by the H 2 O 2 activation; ·OH was generated due to the redox cycle between Cu(I)/Cu(II) and was responsible for phenol degradation using H 2 O 2 . High performance liquid chromatography (HPLC) analysis indicated that hydroxylation and sulfate radicals addition of phenol were the initial oxidation reaction steps of hydrogen peroxide and persulfate, respectively, followed by further oxidation to form short-chain carboxylic acids. The kinetic advantages of microwave-assisted reactions. The activation of persulfate involved thermal gradients and redox reaction simultaneously. The reaction mechanism in Na 2 S 2 O 8 -Cu/SiC system was examined.
研究领域:
环境科学
·
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 17
·
IF 1.768
Ronglan Wu,Lingyuan Tian,Wei Wang,Xiaolin Man
In this article, we report a study of the design and synthesis of a bifunctional cellulose derivative on the removal of phenols and heavy-metal ions in wastewater treatment. A radical polymerization was performed in an ionic liquid, 1-allyl-3-methylimidazolium chloride, to graft two monomers, butyl methacrylate and 4-vinyl pyridine, on the backbone of cellulose. The effects of the five reaction conditions on the yield of final products were evaluated. The grafted celluloses were characterized by means of Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. Adsorption experiments were carried out on the cellulose- g -poly(butyl methacrylate- co -4-vinyl pyridine) to evaluate the capacity of the removal of 2,4-dichlorophenol (2,4-DCP) and Cu(II) in water. The adsorption isotherms were measured at five temperatures and interpreted by a Langmuir model of adsorption. The thermodynamics of the adsorption suggested that the binding process was mildly exothermic for Cu(II) and endothermic for 2,4-DCP. Kinetic studies were interpreted with a pseudo-second-order adsorption model. The process of the adsorption of 2,4-DCP could be described overall by the model, whereas the adsorption of Cu(II) involved two processes. This was due to adsorption both on the surface and inside the adsorbent. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41830.
研究领域:
环境化学
·
高分子材料科学
·
水处理技术
·
吸附分离
·
绿色化学
✓ 已验证
DOI
高影响因子
Exploration
·
2023
·
IF 0
Yang Li,Jinyan Lin,Yueyang He,Kaiyuan Wang,Cailin Huang,Ruifeng Zhang,Xiaolong Liu
Traditional tumour-dynamic therapy still inevitably faces the critical challenge of limited reactive oxygen species (ROS)-generating efficiency due to tumour hypoxia, extreme pH condition for Fenton reaction, and unsustainable mono-catalytic reaction. To fight against these issues, we skilfully develop a tumour-microenvironment-driven yolk-shell nanoreactor to realize the high-efficiency persistent dynamic therapy via cascade-responsive dual cycling amplification of •SO 4 − /•OH radicals. The nanoreactor with an ultrahigh payload of free radical initiator is designed by encapsulating the Na 2 S 2 O 8 nanocrystals into hollow tetra-sulphide-introduced mesoporous silica (HTSMS) and afterward enclosed by epigallocatechin gallate (EG)-Fe(II) cross-linking. Within the tumour microenvironment, the intracellular glutathione (GSH) can trigger the tetra-sulphide cleavage of nanoreactors to explosively release Na + /S 2 O 8 2 − /Fe 2+ and EG. Then a sequence of cascade reactions will be activated to efficiently generate •SO 4 − (Fe 2+ -catalyzed S 2 O 8 2 − oxidation), proton (•SO 4 − -catalyzed H 2 O decomposition), and •OH (proton-intensified Fenton oxidation). Synchronously, the oxidation-generated Fe 3+ will be in turn recovered into Fe 2+ by excessive EG to circularly amplify •SO 4 − /•OH radicals. The nanoreactors can also disrupt the intracellular osmolarity homeostasis by Na + overload and weaken the ROS-scavenging systems by GSH exhaustion to further amplify oxidative stress. Our yolk–shell nanoreactors can efficiently eradicate tumours via multiple oxidative stress amplification, which will provide a perspective to explore dynamic therapy.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
DOI
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Xiangli Zheng,Shan Liu,Xiaoxia Hua,Fangquan Xia,Dong Tian,Changli Zhou
ABSTRACT A new electrochemical sensor for determination of 2,4,6-trichlorophenol (2,4,6-TCP) was fabricated. The characterization of the sensor was studied by scanning electron microscopy, electrochemical impedance spectroscopy and cyclic voltammetry techniques. The electrochemical behavior of 2,4,6-TCP was investigated using cyclic voltammetry and differential pulse voltammetry at the HS-β-cyclodextrin (HS-β-CD)/gold nanoparticles (AuNPs) composite modified indium tin oxide (ITO) electrode. The results showed that the current responses of 2,4,6-TCP greatly enhanced due to the high catalytic activity and enrichment capability of composites. The peak current of 2,4,6-TCP increases linearly with the increase of the 2,4,6-TCP concentration from 3.0 × 10 −9 to 2.8 × 10 −8 M, with the limit of detection of 1.0 × 10 −9 . Further more, the modified electrode was successfully applied to detect the level of 2,4,6-TCP in tap water samples with excellent sensitivity.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL ENGINEERING
·
2024
·Vol. 150
·期 8
·04024038
·
IF 1.6
Jingcheng Wei,Jing Zhang,Bingyan Zhu,Tingfeng Xue,Zejia Song,Sumin Li,Liwei Pan
Activation of peroxymonosulfate (PMS) by catalysts for water treatment is very important for the sulfate radicals-based advanced oxidation technology. Constructing affordable and recyclable transition metal catalysts with high efficiency is highly desirable, but still challenging. In this study, a novel CoAl2O4/Co2O3@γ-Al2O3 catalyst for the activation of PMS was prepared with an excessive impregnation method, and its performance on the catalytic degradation of phenol in water was investigated. The composition and structure of the catalyst were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and N2 adsorption-desorption experiments. It was found that the catalyst could greatly promote the phenol mineralization in water as the total organic carbon removal increased from 4.27% to 57.64% after 60 min of reaction. The presence of Cl− inhibited the catalytic degradation of phenol in water at low concentrations, but promoted the catalytic degradation at high concentrations. However, HCO3− and CO32− revealed inhibitory effects on the catalytic degradation because they could scavenge free radicals in the system. Based on the electron spin resonance technique and the quenching experiments, O12 and SO4−· were identified to be the primary reactive species for the catalytic degradation. The CoAl2O4/Co2O3@γ-Al2O3 could be easily recovered and reused. The toxicity evaluation verified that the toxicity of the treated water was greatly decreased after the catalytic degradation. Therefore, the CoAl2O4/Co2O3@γ-Al2O3 prepared in this study could be an effective catalyst for the catalytic degradation of phenol in water by activating PMS.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2017
·
IF 0
J. He,X.-H. Lu,Y. Shen,R. Jing,R.-F. Nie,D. Zhou,Q.-H. Xia
Cyclohexanol is an excellent starting material for fuel production, but direct selective hydrogenation of phenol to cyclohexanol under mild conditions is a challenge. Herein we report a catalyst made of Ni nanoparticles supported on high-surface silica, which is highly active for selective formation of cyclohexanol under 1.0 Mpa pressure of hydrogen in aqueous medium without additives. Conversion of 100 mol% and selectivity up to 100% are achieved within 4 h and 1.0 MPa H 2 . Some factors such as the type of the source of silica, the loading of Ni, the reaction temperature and time, the H 2 pressure play important roles in controlling the selective hydrogenation. The generality of the 10%Ni/SiO 2 -1 catalyst for this reaction is demonstrated by selective hydrogenation of other hydroxylated aromatic compounds as well.
研究领域:
催化化学
·
有机合成
·
材料化学
·
绿色化学
·
能源化学
✓ 已验证
DOI
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Yang Li,Xu Zhang,Asan Yang,Chunyue Jiang,Guoliang Zhang,Jingwen Mao,Qin Meng
Multi-layer graphene oxide (GO) membranes show great perspective in vast fields due to special two-dimensional structure. However, pure GO membranes generally face main obstacles of low flux, weak interlayer interaction and poor stability, which hinder their wide application in separation. Introduction of nano-porous crystals into interlayer of GO nanosheets to form 3D/2D structure is a potential strategy to overcome these issues. In this study, novel polyphenol etched hollow MOF/GO composite membrane was first synthesized employing modified hollow metal organic frameworks with strong hydrophilicity and hollow structure by one-step etching-aided cross-linking method. MOF nanoparticles with hollow structure expanded interlayer spacing of GO nanosheets and brought about formation of additional water channels, significantly reducing water transfer resistance. Meanwhile, nano-porous crystal MOFs modified by phenolic materials were able to cross-link adjacent GO nanosheets via π–π interfacial interactions to achieve stable structure and increase anti-swelling property of membranes. The pores with abundant hydroxyl groups provided strong free energy barrier for ions at medium and low concentrations of ionic strength , therefore not only greatly improved membrane permeaselectivity, but also enhanced anti-fouling performance. The prepared eZIF-8/GO nanofiltration membrane exhibited excellent permeate flux of 16.4 L m −2 h −1 bar −1 , 382% higher than pure GO membrane, and competitive Na 2 SO 4 rejection of 86.3%. By simply adjusting GO loading to further reduce membrane thickness, the permeate flux reached up to 45.4 L m −2 h −1 bar −1 with high rejection more than 99% for organic molecules. These results indicate that novel MOF/GO composite membranes have broad application prospects in desalination and water treatment.
研究领域:
材料科学
·
环境工程
·
膜分离技术
·
纳米材料
·
水处理
·
界面化学
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 81
·期 11
·2337-2350
·
IF 1.638
Wang Jianyu,Cheng Guang,Lu Jian,Chen Huafeng,Zhou Yanbo
In this study, 4,4′-(hexafluoroisopropene) diphthalic acid (PDA)-CD polymers containing β -cyclodextrin (CD) were synthesized for the adsorption of endocrine disrupting chemicals (EDCs) and dyes. It features great adsorption of bisphenol A (BPA), methylene blue (MB) and neutral red (NR). The maximum adsorption capacities of MB, NR and BPA can reach 113.06, 106.8 and 51.74 mg/g, respectively. The tandem adsorption results revealed that adsorptions of dyes and BPA onto PDA-CD polymer were two independent processes: non-polar BPA entrapment by cyclodextrin cavities while dyes were captured by the carboxyl groups and π - π stacking interactions. The adsorption processes performed well in a wide range of pH (4.0–10.0) and were not affected by fulvic acid (FA) and inorganic ions.
研究领域:
环境化学
·
材料科学
·
污染控制
·
吸附技术
·
环境功能材料
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Tingting Zhang,Yanling Yang,Xing Li,Nan Wang,Hang Li,Peng Du,Haikuan Yu,Siyang Ji,ZhiweiZhou
In this study, an experimental study aimed at optimizing the factors affecting the regeneration amount of 4-chlorophenol (4-CP) from spent powdered activated carbon (PAC) is presented. For this response surface methodology (RSM) with Box-Behnken design was applied, which identified four variables (acoustic density, NaOH concentration, spent PAC dosage and ethanol concentration) in batch experiments. The physicochemical characteristics of the regenerated PAC under the optimal desorption condition was evaluated using thermogravimetric analysis, Fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) and scanning electron microscopy, as compared with the virgin and spent PACs. Among the four variables, acoustic density and ethanol concentration (v/v, %) had stronger effect on the 4-CP desorption (p < 0.001). The predicted optimal 4-CP desorbing amount was 97.43 mg g –1 , and this matched well the observed performance of (96.94 ± 0.70) mg g –1 , obtained by acoustic density of 0.36 W mL –1 , NaOH concentration of 0.10 mol L –1 , spent PAC dosage of 0.93 g L –1 and ethanol concentration (v/v) of 24%. The result of thermogravimetric pyrolysis profiles of regenerated PAC confirmed that the adsorption behavior of 4-CP exhibited a chemisorption feature and desorption process was dominated by chemical reaction. Analysis of FTIR, pore structure and BET surface area demonstrated that ultrasound mainly acted on the surface functionalities, macro-pore and meso-pore structure of PAC. Additionally, the SEM images indicated that cavitation effect affected the surface roughness and surface cavities of PAC. The results here provided an insight into the application of ultrasound to regenerate saturated PAC with 4-CP.
研究领域:
环境工程
·
吸附与再生
·
水处理技术
·
物理化学方法
·
环境污染控制
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）