JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Ningyi Chen,Shuang Wu,Ying Xu,Sijie Lv,Xianhua Wang,Qingrui Zhang,Bingjun Pan
High-resolution identification of chromium (Cr) species, especially various organic-Cr complexes, in a convenient and economically-feasible manner is the prerequisite for achieving the advanced treatment of chromium wastewater. To this end, a colorimetric nano-Au sensor array was developed by taking advantage of the UV-spectra shift of gold nanoparticles (Au NPs) upon interaction with Cr species; specifically, four molecular modifiers [i.e., iminodiacetic acid (IDA), tripolyphosphate (TPP), cetyltrimethylammonium bromide (CTAB), and 1,5-diphenylcarbazide (DPC)] were intentionally employed for assembling nano-Au array receptors, which showed respective responses toward different Cr species through the formation of coordination, hydrophobic interaction, electrostatic attraction, and redox reaction , respectively; the “fingerprint” differences of the unique optical properties were then integrated for semi-quantitatively recognizing Cr species by pattern recognition techniques. Eleven ubiquitous Cr species [i.e., Cr(III), Cr(VI), and various Cr(III)-organic complexes] served as the model samples, which could be sensitively identified, no matter in individual or mixture mode, by the developed nano-Au sensor array on the basis of the colorimetric responses resulted from diverse nano-Au-aggregation behaviors, with excellent anti-interference ability in the simulated or actual water scenario. Attractively, the nano-Au sensor array can achieve very sensitive detection limit of the quantitative analyses of Cr species in a prompt in-situ manner, which usually requires a two-step process of separation and detection for the conventional analytical methods. Such a convenient strategy of Cr species discrimination conduces to rationally designing specific protocols for the advanced treatment of chromium wastewater.
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Food Chemistry-X
·
2024
·
IF 6.5
Guodong Mu,Sha Yan,Fei Pan,Haitao Xu,Xu Jing,Xiaofeng Xue
Beeswax, an FDA-approved component, has been extensively applied in feed, pharmaceutical, and food industries. The occurrence of neonicotinoid pesticides in beehive systems and their residues in beeswax have caused safety risks. Therefore, establishing a detection method for neonicotinoid pesticide residues in beeswax is crucial for ensuring its quality. The superhydrophobic property of beeswax makes it a challenge to develop suitable determination methods. In this work, we determined Proline and Oxalic acid as a suitable deep eutectic solvent (DES) to extract neonicotinoids from beeswax through theoretical design and verification tests. Systematic molecular dynamics simulations confirmed that hydrogen bonding and van der Waals forces facilitate the migration of neonicotinoid pesticides from beeswax into the DES. Performance analysis of the method revealed that the DES extraction combined with UHPLC-MS/MS approach exhibited excellent detection capabilities. It was applied to real beeswax sample analysis with the characteristics of simpleness, quickness, environmental friendliness, and high throughput.
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Nano-Micro Letters
·
2024
·Vol. 17
·期 1
·1-15
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IF 31.6
Liu Yongxu,Song Jiangnan,Liu Zhen,Chen Jialin,Wang Dejuan,Zhi Hui,Tang Jiebin,Zhang Yafang,Li Ningbo,Zhou Weijia,An Meng,Liu Hong,Xue Guobin
Ionic polymers can directly serve as high-performance ion-selective membranes when it was physically confined within submillimeter-sized cylindrical pore.
The universality of this strategy is demonstrated in preparing cation/anion-selective membrane.
With real seawater and river water, the output power density of a three-chamber cell on behalf of repeat unit of reverse electrodialysis system can reach up to 8.99 W m −2 .
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Chengtuo Niu,Yiyang Liu,Heng Li,Chunfeng Liu,Qi Li
This study aimed to elaborate the biochemical and chemosensory characteristics of doubanjiang fermentation via a two-stage controlled temperature. HL group with variable temperature (40 °C → 30 °C) and NTF group fermented following traditional technique were prepared and their volatile and non-volatile metabolites were compared through multivariate statistical analysis. HL group favored the accumulation of amino acid nitrogen, free amino acids and organic acids in the early stage and maintained adequate total acids and biogenic amines in the mid-late stage. HL group also had preferred jiang and fruity flavor through sensory evaluation. A total of 116 volatile metabolites were identified in HL or NTF groups and 22 marker volatile metabolites were screened through the combinational use of OPLS-DA and Random Forest analysis. Stronger anti-oxidant ability was observed in HL group while adequate number of acidic compounds and biogenic amines were ensured. This indicated that the two-stage controlled temperature fermentation was beneficial for doubanjiang fermentation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2015
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IF 3.091
Yapeng He,Weimin Huang,Rongling Chen,Wenli Zhang,Haibo Lin
The main aim of the present study was to explore the potential of boron-doped diamond (BDD) film electrode on porous titanium (Ti) substrate to promote the electrochemical oxidation of organic pollutants. Porous Ti endowed the Ti/BDD film three-dimensional porous structure. The electrochemical effective surface area for porous Ti/BDD anode was 8.37 cm 2 /cm 2 , 3.2 times as much as that of two-dimensional flat Ti/BDD electrode. Furthermore, the generation ability and rate of hydroxyl radical ( OH) on porous BDD electrode were enhanced due to the porous structure of BDD film. The step currents on porous Ti/BDD were about 2 times of those on flat Ti/BDD electrode from chronoamperometry curves, porous Ti/BDD exhibited superior indirect electrochemical oxidation ability. The results of electrodegradation of several typical organic pollutants (oxalic acid, phenol, sodium dodecylbenzene sulfonate, xylenol orange) revealed that current efficiencies on porous Ti/BDD electrode were about 30% higher compared with flat BDD electrode, corroborating the enhanced of electrochemical oxidation as the introduction of porous Ti substrate. Moreover, the discrepancy between promotion of COD removal rate and enhancement of OH was discussed.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhichao Kang,Nannan Li,Xuerong Han,Chenxu Wang,Xiutao Yang,Hongwen Yu
The ecology is seriously endangered by atrazine residue, which is generated and accumulated by agricultural practices. The atrazine-degrading bacterium Paenarthrobacter sp. KN0901 and acid-added microwave hydrochar are used in this work to construct hybrid microorganism-material systems that effectively remove atrazine from the environment. The baseline atrazine degradation rate increased by 25.5 % when H 2 SO 4 -added microwave hydrochar (ISHC) was added, after 72 h of incubation at 15 °C. With the addition of acid-added microwave hydrochar, the number and autoinducer-2 activity of strain KN0901 increased significantly, suggesting the enhanced quorum sensing compared to the free bacterial cells. The biochemical reaction levels in strain KN0901 were regulated as a result of enhanced quorum sensing. The expression levels of genes associated with atrazine biodegradation in strain KN0901 were significantly elevated following the addition of AMHC, leading to an increased production of hydrolases involved in atrazine degradation. Furthermore, the biofilm formation process was improved with AMHC treatment, facilitating a greater exchange of substances between the interior and exterior of the bacterial cells. This enhancement allows for more efficient uptake of atrazine by strain KN0901, thereby promoting the degradation. The findings indicate that acid-added microwave hydrochars improved atrazine degradation by enhancing the quorum sensing of strain KN0901. The atrazine degradation rate in this system increased under different conditions, including changes in the pH, temperature, salt concentration, and heavy metal concentrations. This study presents a novel methodology for the development and application of bioremediation techniques aimed at addressing atrazine contamination in various environmental conditions.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Fulin Wang,Helin Hua,Hui Jia,Dingying He,Zhongyou Jiang,Jiaxin Cao,Shanshan Dong,Zhenxing Zeng,Suhua Chen
The construction of heterojunction is considered to be an effective way to promote the photocatalytic activity, while it is always challenging due to the mismatched lattices of heterojunctional materials and results in an unsatisfactory enhancement of charge carrier separation. It is critical to overcome that lattice mismatch and establish charge transfer channels in heterojunction for achieving high charge transfer and separation. In this study, a red phosphorus/phosphorus doped graphitic carbon nitride (RP/P-CN) type I heterojunction was constructed to boost interfacial charge transfer for Cr(Ⅵ) photoreduction through in situ growing RP on g-C 3 N 4 nanosheets. The formed P − N bonds around interfaces in the RP/P-CN allowed photoexcited charge to rapidly transfer from the conduction band of P-CN to that of RP, which contributed to the significant achievement of Cr(Ⅵ) reduction. The constructed interfacial charge transfer channels largely promoted the photoexcited charge carrier separation in the RP/P-CN. Additionally, the simultaneous RP formation and P doping significantly enhanced the visible light response and the adsorption efficiency of Cr(Ⅵ). As a result, RP/P-CN 1:5 could achieve 99.1 % removal of Cr(Ⅵ) after 20-min visible light irradiation with an achieved apparent kinetic rate constant (k app ) of 0.2289 min −1 , which were much better than the 19.2 % of Cr(Ⅵ) removal by pure g-C 3 N 4 and presented a 21-fold higher k app than pure g-C 3 N 4 (0.0108 min −1 ) achieved, respectively. This study provides a new strategy to design an efficient g-C 3 N 4 based metal-free heterojunction for Cr(Ⅵ) photoreduction.
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Food Bioscience
·
2024
·
IF 4.8
Chengtuo Niu,Xianlei Xing,Wenjun Zuo,Zongchi Zuo,Fuming Liu,Chunfeng Liu,Qi Li
Raw-materials based broad bean paste (rmBBP) is popular among consumers. Though high salinity can select functional microbial community for fermentation, it also impaired the fermentation efficiency of rmBBP and unfavored human health. Therefore, this study aimed to construct a synthetic microbial community based on key functional microbes for reduced salt rmBBP fermentation based on the elucidation of the microbial community succession during fermentation. Based on the tracked determination and multivariate statistical analysis of the physicochemical parameters, metabolites and the structure of microbial community, salinity and microbial interactions were key drivers for the succession of microbial community. Aspergillus , Staphylococcus , Weissella and Tetragenococcus were predicted to play key roles during fermentation. After that, core species were isolated from rmBBP mash and their salinity tolerance and metabolic characteristics were evaluated. Finally, a synthetic microbial community ( Aspergillus oryzae , Staphylococcus carnosus , Tetragenococcus halophilus and Weissella confusa ) was constructed and applied in reduced-salt rmBBP fermentation. The bioaugmentation contributed to the accumulation of volatile metabolites while effectively maintaining the acidity during rmBBP fermentation when salinity was reduced from 12% to 10%. In general, this study developed a synthetic microbial community with desired characteristics for successful reduced-salinity rmBBP fermentation.
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MOLECULES
·
2017
·Vol. 22
·期 7
·1068
·
IF 2.861
Yalu Dong,Panpan Peng,Baoping Hu,Hui Su,Shenghua Li,Siping Pang
High-energy metal–organic frameworks (MOFs) based on nitrogen-rich ligands are an emerging class of explosives, and density is one of the positive factors that can influence the performance of energetic materials. Thus, it is important to design and synthesize high-density energetic MOFs. In the present work, hydrothermal reactions of Cu(II) with the rigid polynitro heterocyclic ligands 5,5′-dinitro-2H,2′H-3,3′-bi-1,2,4-triazole (DNBT) and 5,5′-dinitro-3,3′-bis-1,2,4-triazole-1-diol (DNBTO) gave two high-density MOFs: [Cu(DNBT)(ATRZ)3]n(1) and [Cu(DNBTO)(ATRZ)2(H2O)2]n(2), where ATRZ represents 4,4′-azo-1,2,4-triazole. The structures were characterized by infrared spectroscopy, elemental analysis, ultraviolet-visible (UV) absorption spectroscopy and single-crystal X-ray diffraction. Their thermal stabilities were also determined by thermogravimetric/differential scanning calorimetry analysis (TG/DSC). The results revealed that complex1has a two-dimensional porous framework that possesses the most stable chair conformations (like cyclohexane), whereas complex2has a one-dimensional polymeric structure. Compared with previously reported MOFs based on copper ions, the complexes have higher density (ρ = 1.93 g cm−3for complex1and ρ = 1.96 g cm−3for complex2) and high thermal stability (decomposition temperatures of 323 °C for complex1and 333.3 °C for complex2), especially because of the introduction of an N–O bond in complex2. We anticipate that these two complexes would be potential high-energy density materials.Keywords:energetic materials;metal organic frameworks;densities;polynitro heterocyclic ligands
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CRYSTAL GROWTH & DESIGN
·
2016
·
IF 4.425
Yong Chen,Long Li,Jia Yao,Yu-Yu Ma,Jia-Mei Chen,Tong-Bu Lu
Apixaban (apx), with a trade name of Eliquis, is a highly selective and efficacious inhibitor of blood coagulation factor Xa. Apixaban has poor solubility in water (0.028 mg/mL at 24 °C) and a relatively low oral bioavailability (about 50% for a single 10 mg dose). The purpose of this study is to improve the solubility and consequently the oral bioavailability of apixaban via a cocrystal. A cocrystal of apixaban with oxalic acid (apx-oxa-H2O, 4:3:0.5) was successfully obtained and characterized. The structure of the cocrystal was determined by single-crystal X-ray diffraction. The solubility of the cocrystal in 0.1 M HCl (pH 1.0) and phosphate buffer of pH 6.8 was evaluated, and the results show the solubility values of the cocrystal are approximately 2.2 and 2.1 times as large as those of apixaban form N-1 (the marketed product), respectively. The pharmacokinetics in beagle dogs was also investigated, and the mean AUC0–24h of the cocrystal is approximately 2.7 times as large as that of apixaban form N-1, indicating that both solubility and bioavailability of apixaban can be improved via a cocrystal.
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ACS Sustainable Chemistry & Engineering
·
2016
·
IF 5.267
Li Duan,Li-Li Dou,Long Guo,Ping Li,E-Hu Liu
Deep eutectic solvents (DESs) are emerging as green and sustainable solvents for efficient extraction of bioactive compounds or drugs. This work aimed to comprehensively evaluate the potential and effectiveness of DESs for extraction of different types of natural compounds from biomass. Five Chinese herbal medicines including Berberidis Radix, Epimedii Folium, Notoginseng Radix et Rhizoma, Rhei Rhizoma et Radix, and Salviae Miltiorrhizae Radix et Rhizoma were selected to assess the efficiency of DESs on extraction of alkaloids, flavonoids, saponins, anthraquinones, and phenolic acids, respectively. Totally 43 types of choline chloride-, betaine-, and l-proline-based DESs with different polarity, viscosity, composition, and solubilization abilities were tailored to test their extraction efficiency, and the operation conditions were statistically optimized using response surface methodology to produce the most efficient process. In this work, DES solvents were first introduced to extract alkaloids and anthraquinones. The results indicated that most prepared DESs proved to be efficient solvents for extraction of alkaloids, but lower extractability for anthraquinones. The extraction capacity of DES may be correlated with their physical–chemical properties, including H-bonding interactions, polarity, viscosity, and pH. This study demonstrated that DESs were suitable green extraction solvents for selectively and efficiently extracting bioactive compounds from biomaterials.
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JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Huijuan Zhang,Bin Li,Jiefeng Pan,Yawei Qi,Jiangnan Shen,Congjie Gao,Bart Van der Bruggen
Novel carboxyl-functionalized graphene oxide (CFGO)/polyamide (PA) nanofiltration (NF) membranes were prepared via interfacial polymerization (IP) of piperazine (PIP) and trimesoyl chloride (TMC). CFGO was fabricated by a chemical modification (ring opening followed by esterification) to the epoxide ring of GO. CFGO was then introduced in the PIP aqueous phase as an additive in the IP reaction. Compared with a pristine PA reference membrane, both the GO/PA and CFGO/PA membrane have an enhanced permeability (the optimum concentration of GO and CFGO in the membrane was 0.05% and 0.07%, and the corresponding water flux is 96.5 and 112.1 L/m 2 /h, respectively),with a slight decrease of the salt rejection. In dye desalination experiment, the permeation flux of 0.05%GO/PA membrane is only 75.5 L/m 2 /h, with 98.1% rejection of New Coccine (a dye with negative charge) and 28.7% retention for NaCl. For 0.07%CFGO/PA membrane, it can cut off 25.0% NaCl and 95.1% New Coccine, and its permeation flux can reach 110.4 L/m 2 /h, which shows that the CFGO/PA membrane could be potentially applied to the dye desalination and concentration process . The CFGO/PA membrane shows better performances in permeability and dye desalination than GO/PA membrane, due to the significantly increased hydrophilicity and enhanced surface charge density.
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