JOURNAL OF CHROMATOGRAPHY A
·
2023
·
IF 4.1
Yuhan Ning,Yang Xu,Jingyi Bao,Weiping Wang,Ai-jun Wang
In this work, β-cyclodextrin-functionalized magnetic graphene oxide (NiFe 2 O 4 @GO@β-CD) was synthesized and employed as magnetic solid-phase extraction adsorbent for the extraction of bisphenols before high performance liquid chromatography analysis. The modification of β-cyclodextrin could enhance the adsorption performance of NiFe 2 O 4 @GO@β-CD towards bisphenols through the host-guest interaction and hydrogen-bond interaction. Under the optimal conditions, good linearities between peak area and concentration of bisphenols (1 – 300 μg L −1 , r ≥ 0.9989) were obtained with the limits of detection (S/ N = 3) in the range of 0.050 – 0.10 μg L –1 . The recoveries of bisphenols in milk and milk packaging ranged from 78.0% to 101.6%. Moreover, NiFe 2 O 4 @GO@β-CD showed stable chemical properties and good reusability with the recoveries of bisphenols remained above 80.0% after 12 MSPE cycles. The adsorption characteristics of NiFe 2 O 4 @GO@β-CD towards bisphenols fitted well with the pseudo-second-order kinetic model and Langmuir model. The hydrogen-bond interaction, π-π interaction, host-guest interaction and electrostatic interaction between sorbent and bisphenols played important role during the adsorption process. The developed method showed potential applications for the analysis of trace bisphenols in milk and milk packaging.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yun Guo,Wenjie Zhao,Shuyu Dai,Jian Mao,Qidong Zhang,Zhengkun Xie,Wenfen Zhang,Wuduo Zhao,Ajuan Yu,Shusheng Zhang
Herein, a highly stable (NAllyl) 4 -bridged alyzacalix[4]pyridine monolithic column (nAC4P@capillary) was fabricated by copolymerizing nAC4P with GMA and EDMA into a stationary phase through a simple olefin addition reaction. The physicochemical properties of the prepared materials were characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), energy dispersive X-ray (EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and elemental analysis (EA). A wide range of analytes with various properties was well separated and demonstrated the synergistic effect of the various interaction sites. The maximum column efficiencies (N max ) for all the analytes reached 62,368 plates/m, and the relative standard deviations (RSDs) of the daily retention times of alkylbenzenes, measured over six months were all lower than 5.63%. Non-covalent interaction analysis reveals that nAC4P@capillary can effectively combine the advantages of electronic configurations, π-π interactions, CH-π interactions, O–H…N hydrogen bonds and lone pair-π interactions, providing excellent prospects for high-performance chromatographic separation .
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jia Gao,Li Yan,Yan Yan,Li Chen,Jian Lu,Wendong Xing,Chao Yu,Muning Chen,Minjia Meng,Yongsheng Yan,Yilin Wu
Ensuring both selective separation and fast regenerability is still a challenge, especially for long-term operation in a harsh water system. Sustainable and effective development of molecularly imprinted membranes is highly desired. Herein, we propose a type of solvent-driven controllable molecularly imprinted membranes (CS-BMIMs) to realize the switched selectivity and fast regenerability by customized bifunctional monomers. The stable supramolecular envelope interaction and hydrogen bonds between the bifunctional monomers and the phenolic hydroxyl group is introduced to regulate the selectivity of BPA. The selectivity coefficients of CS-BMIMs can reach 7.52 ( α BPA/BP ) and 7.97 ( α BPA/HQ ). Poly (ethylene glycol) unit-containing chain of dynamic solvent-responsive cross-linker drives the swelling and deswelling polymer chains to accelerate the regenerability. Significantly, BPA can be readily adsorbed into the imprinted sites in a 25% methanol (MeOH) aqueous solution with an adsorption capacity of 41.88 mg g −1 while completely desorbed in 100% MeOH following the deswelling of BPA-imprinted sites. Compared with the ordinary elution methods ( V MeOH : V acetic acid , 9: 1), the solvent-driven controllable method displayed a fast adsorption/desorption process with desirable regenerability (15 min). Moreover, the proposal of “specially designed” stimulus–response material enriches the designability and options of membrane separation in water treatment, thereby laying a foundation for developing decontamination of the water.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xue Cao,Jing Gao,Yufeng Yang,Heyu Li,Xiaobing Zheng,Guanhua Liu,Yanjun Jiang
Laccase enzyme was immobilized on inert support followed by doping this composite with Cu for a more effective chlorophenol inactivation kinetics in the light and in the dark. To be specific, hollow titanium dioxide (H-TiO 2 ) was prepared by using dendritic mesoporous silica nanoflowers (DMSNs) as hard template. Hollow titanium dioxide (H-TiO 2 ) was used to prepare Cu-H-TiO 2 . The support structure stabilized laccase providing Lac@Cu-H-TiO 2 with higher pH, thermal, and irradiation stability. Lac@Cu-H-TiO 2 degraded 2,4-dichlorophenol (2,4-DCP) under visible light to about 95% within 12 h and was fairly stable up to 10 cycles. The stability data of the innovative compound addressed in this study is documented. The photo-active based enzyme integrated photocatalyst are shown in this pioneering study as promising candidates for phenolic pollutant degradation . This is based on the very high activity of enzymes compared to other chemical reagents.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Li Chen,Tahir Maqbool,Wanyi Fu,Yulong Yang,Congyu Hou,Jianning Guo,Xihui Zhang
In this study the performance of catalytic ceramic membranes in activating peroxymonosulfate (PMS) for the degradation of emerging organic contaminants (EOCs) was investigated. The catalytic ceramic membrane (MnCM) integrated with Mn 2 O 3 nanoparticles was fabricated by a solid-state sintering method. Physical and chemical properties of MnCM were characterized by SEM/EDX, XRD, BET, AFM and XPS. The MnCM/PMS system has shown excellent decontamination efficiencies (81–97% removal) for different EOCs. Acetaminophen (APAP) has been efficiently degraded by MnCM/PMS in different real water matrices and harsh water conditions. Based on results of quenching experiments and electron paramagnetic resonance (EPR) analyses, non-radical pathway with singlet oxygen ( 1 O 2 ) was the dominant ROS for the degradation of EOCs. The membrane pores in active layer acted as micro-reactors for the interaction among active sites, PMS, and EOCs. The MnCM/PMS system showed outstanding catalytic stability with high mineralization (TOC removal of ∼ 65%) and negligible leaching of the manganese (1.3–1.5 µg/L) in permeate. Hydroxylation and C-N bond cleavage were found to be the main degradation pathways of APAP by MnCM/PMS system. The MnCM prepared in this study with excellent performance could be a way forward for applications at large-scale or full-scale water systems suffering from heavy loads or trace amount of refractory organic compounds.
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RADIATION PHYSICS AND CHEMISTRY
·
2022
·
IF 2.776
Yan Wu,Xue-Qi Zhang,Xiao-Jing Guo,Ling-Hui Kong,Rong-Fang Shen,Jiang-Tao Hu,Xi Yan,Yan Chen,Wan-Zhong Lang
Herein, a convenient and environment-friendly grafting strategy was used to anchor beta-cyclodextrin (β-CD) on polypropylene (PP) fabric, which includes grafting of GMA onto PP nonwoven fabric via 60 Co γ-ray and introduction of β-CD by the ring-opening reaction between the hydroxyl group of β-CD and the epoxy group of GMA. The as-prepared fabric composite (PP-g-GMA-βCD) showed a bisphenol A (BPA) adsorption amount of 27.72 mg/g in the single BPA solution (75 ppm). The BPA adsorption amount by PP-g-GMA-βCD was not sensitive to pH condition, and the anti-interference ability to ions was also strong. The Langmuir isotherm model was found to be suitable for the adsorption of BPA, and the entire adsorption process followed the pseudo-second-order kinetics. PP-g-GMA-βCD showed excellent stability and reusability that the BPA adsorption amount remained almost unchanged after 10 successive recycles. In the BPA and methyl orange (MO) mixed solution (BPA: 75 ppm; MO: 50 ppm), the adsorption amounts of BPA and MO by PP-g-GMA-βCD were 23.88 and 20.83 mg/g, respectively. The presence of MO resulted in a little decrease in the adsorption amount of BPA, as β-CD can also form host–guest complexes with MO, and there would also be π-π and H-bond interactions between BPA and MO.
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JOURNAL OF CHROMATOGRAPHY A
·
2022
·
IF 4.601
Yang Feng,Min Sun,Mingxia Sun,Jiaqing Feng,Haili Sun,Juanjuan Feng
Polyamidoamine dendrimers with different generations (G1-G5) were synthesized in situ on silica progressively via Michael addition and amidation reactions. A sequence of materials was characterized by elemental analysis and Brunauer-Emmett-Teller test, the content of each element (C, H and N) was increased but the surface area was reduced gradually from G1 to G5. These materials were separately packed in a stainless steel column (10 × 4.0 mm, i.d.) for SPE . These SPE columns were combined with high performance liquid chromatography (HPLC) to establish an online SPE-HPLC analysis. According to the chemical structures of materials, polycyclic aromatic hydrocarbons (PAHs) and bisphenols as model analytes were selected to investigate the extraction performance and the extraction mechanism, so as to reveal the extraction performance-structure relationship of G1-G5. The extraction performance was improved with the increase of functional groups from G1 to G4 or G5, the hydrophobic effect played main role accompanied with possible weak hydrophilic, hydrogen-bonding and electrostatic interactions in extraction mechanism. The adsorption capacity, enrichment factor, partition coefficient and extraction efficiency for PAHs and bisphenols reached to 17.52 µg g −1 and 2.70 µg g −1 , 5353 and 3002, 5066 and 1197, and 90.09% and 60.05% respectively. Compared with commercial SPE materials, these dendrimer-grafted silica materials were inferior to C18, but better than silica. Furthermore, the G4 and G5 were separately selected to develop two online SPE-HPLC analytical methods for determining trace PAHs and bisphenols in real water samples, and satisfactory results were obtained.
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高影响因子
Small
·
2022
·Vol. 18
·期 9
·2104941
·
IF 15.153
Lixue Yang,Haoqi Yang,Shengyan Yin,Xiuyan Wang,Mingwei Xu,Guolong Lu,Zhenning Liu,Hang Sun
The Fenton-like reaction has great potential in water treatment. Herein, an efficient and reusable catalytic system is developed based on atomically dispersed Fe catalyst by anchoring Fe atoms on nitrogen-doped porous carbon (Fe SA/NPCs). The catalyst of Fe SA/NPCs exhibits enhanced performance in activating peroxymonosulfate (PMS) for organic pollutant degradation and bacterial inactivation. The Fe SA/NPCs + PMS system demonstrates a high turnover frequency of 39.31 min −1 in Rhodamine B (RhB) degradation as well as a strong bactericidal activity that can completely sterilize an Escherichia coli culture within 5 min. Meanwhile, the degradation activity of RhB by Fe SA/NPCs is improved up to 28 to 371-fold in comparison with the controls. Complete degradation of RhB can be achieved in 30 s by the Fe SA/NPCs + PMS system, demonstrating an efficiency much higher than most traditional Fenton-like processes. Experiments with different radical scavengers and density functional theory calculations have revealed that singlet oxygen ( 1 O 2 ) generated on the N-coordinated single Fe atom (Fe-N 4 ) sites is the key reactive species for the effective and rapid pollutant degradation and bacterial inactivation. This work innovatively affords a promising single-Fe-atom catalyst/PMS system for applying Fenton-like reactions in water treatment.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Yongfei Tong,Peng Zhou,Yang Liu,Ningruo Wang,Wei Li,Feng Cheng,Bo Yang,Juan Liang,Yongli Zhang,Bo Lai
In order to accelerate the photo-Fenton reaction process of Fe(III) under visible light irradiation, BiOI was introduced into the Fe(III)/peroxydisulfate (PDS) system. The catalytic oxidation performance of vis-light/BiOI/Fe(III)/PDS system was evaluated using bisphenol AF (BPAF) as a representative organic contaminant . Within 30 min, nearly 100% of BPAF was degraded, proving that the system had an excellent ability to degrade organic pollutants in water. Free radical quenching experiments, electron spin resonance (ESR), and molecular probing experiments determined that the main reactive species in the system were hydroxyl radicals ( • OH) and sulfate radicals (SO 4 •− ). The comparative experiments showed that the degradation rates were closely related to the PDS consumption, while the Fe(II) absorbed on the surface of BiOI was responsible for the PDS consumption. The production pathway of Fe(II) was analyzed by XRD, FTIR and XPS characterization, the Fe(III) on the surface of BiOI was reduced by photogenerated electrons to generate Fe(II). The result confirmed that the reduction of Fe(III) by photogenerated electrons could effectively inhibit the recombination of electron-hole pairs, and accelerate the reduction progress of Fe(III)/Fe(II) cycle that was the rate-limiting step in PDS activation. Afterwards, a reliable mechanism for degradation of BPAF in visible light/BiOI/Fe(III)/PDS system was proposed. Finally, the influence of reactant dosages, visible light intensity , initial pH, humic acid (HA) and anions in the solution on the degradation of BPAF were discussed.
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RSC Advances
·
2022
·Vol. 12
·期 12
·7306-7312
·
IF 4.036
Yixiao Li,Qi Min,Yunfei Wang,Xuming Zhuang,Xiaowen Hao,Chunyuan Tian,Xiuli Fu,Feng Luan
In this work, a ratiometric fluorescence sensor along with a portable coffee ring visualized detection method for bisphenol A (BPA) was developed based on carbon dots. The probe was formed by the coordination polymerization of Eu3+ and 5′-adenosine monophosphate on the surface of carbon dots containing a large number of hydroxyl and carbonyl groups. The results showed that the fluorescence intensity ratio and the concentration of BPA had a good linear relationship in a wide range of 0.1–100 μM with a detection limit of 20 nM (S/N = 3). The recoveries of the added standard BPA in water samples ranged from 91.80 to 102.7% with relative standard deviation values no more than 1.84% (n = 3). In addition, the changes of the fluorescence color of the CDs@Eu–AMP suspension with different BPA concentrations can be easily visualized under a UV lamp by the naked eye, which highlights the great potential of the coffee ring detection method for the fast and convenient monitoring of BPA in real water samples.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Dongli Guo,Yuan Yao,Shijie You,Limin Jin,Ping Lu,Yanbiao Liu
Herein, we developed and evaluated an electrochemical periodate (PI) activation system for the ultrafast degradation of aqueous micropollutants (τ < 3 s). Filters constructed from carbon nanotubes (CNT) coated with Fe 2 O 3 nanoparticles on the outer (Fe 2 O 3 -out-CNT) and inner surfaces (Fe 2 O 3 -in-CNT) were prepared to regulate the generation of reactive oxygen species (ROS) during PI activation. The activation function of the electroactive nanohybrid filters lay in their ability to facilitate the redox cycling of Fe(III)/Fe(II) assisted by an electric field. The results showed that a non-radical ( i.e ., 1 O 2 ) pathway dominated the degradation process in the electro/Fe 2 O 3 -in-CNT/PI system, while a contrastive radical pathway ( i.e ., HO • and IO 3 •) was identified in the electro/Fe 2 O 3 -out-CNT/PI system. The electro/Fe 2 O 3 -in-CNT/PI system exhibited enhanced catalytic activity towards the micropollutants degradation relative to its electro/Fe 2 O 3 -out-CNT/PI counterpart. Density functional theory calculations suggested that PI could be directly decomposed under the nanoconfined environment, rather than forming a stable adsorption complex in the unconfined system.
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ENVIRONMENTAL TOXICOLOGY
·
2022
·Vol. 37
·期 7
·1551-1562
·
IF 4.109
Dan Song,Yuan Liu,Yaxin Yao,Feng Liu,Wenjing Tao,Xiaolong Zhou,Runsheng Li,Xiaowei Zhang,Xiangchen Li
The aim of this study was to assess the protective effect and potential mechanism of melatonin against bisphenol A (BPA)-induced apoptosis and oxidative damage in FLK-BLV cells. The results showed that BPA reduced cell viability in a dose- and time-dependent manner, caused cell shrinkage and induced oxidative stress and apoptosis in FLK-BLV cells, which were effectively reversed by melatonin. In addition, BPA caused autophagy flux impairment, which was confirmed by the increased of LC3-II and p62 levels, whereas melatonin treatment effectively reduced p62 levels under BPA treatment, and reversed apoptosis-related protein expression patterns caused by BPA. However, inhibition of autophagy by CQ partially abolished the protective effect of melatonin on apoptosis, suggesting that melatonin against BPA-induced oxidative injury and apoptosis by activating autophagy pathway. Moreover, we found that melatonin inhibited BPA-induced the activation of p38 MAPK, which was comparable to SB203580 pretreatment, and companied by the activation of autophagy and decreases of apoptosis when compared to BPA alone, indicating that melatonin protected against BPA-induced apoptosis partially through the p38 MAPK-autophagy pathway. In conclusion, these results suggest that melatonin may prevent BPA-induced FLK-BLV cell damage by inhibiting p38/MAPK signaling pathway and activating autophagy, and it could be a potential therapeutic compound in preventing BPA-induced cell damage.
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