JOURNAL OF HYDROLOGY
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2024
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IF 5.9
Linzhu Du,Shuhang Wang,Xia Jiang,Zhihao Wu,Arne Bratkic,Wei Guo
Water depth variation alters lake sediment environments, affecting the exchange of oxygen, trace elements, and nutrients at the sediment–water interface (SWI). However, there is still limited information on the in-situ fate of refractory emerging pollutants such as estrogenic compounds (ECs) at the SWI of different water depths in lakes. In this study, we integrated active sampling and diffusive gradients in thin film (DGT) technology to in-situ investigate the distribution, diffusion, and microbial responses of estrone (E1) at the SWI from the shallow-water zone (SZ), transition-water zone (TZ), and deep-water zone (DZ) in a typical inland lake of northern China. The surface sediment of the DZ accumulated most E1 (479.57 ± 194.90 ng/kg). In the vertical profile of the sediments, for SZ and TZ, E1 concentration in the sediment, porewater, and DGT fluctuated within a certain concentration range with increasing sediment depth. For the DZ, it exhibited a fluctuating and increasing trend with increasing depth. Dynamic migration analysis of E1 indicated partial resupply in each zone, and the resupply parameter R was 0.102 to 0.416 in the SZ, 0.111 to 0.384 in the TZ, and 0.084 to 0.374 in the DZ, respectively. The resupply capacity in the upper sediment layers (−1 to −4 cm) was higher for the TZ and DZ, whereas the SZ showed higher capacity in the lower layers (−5 to −9 cm). Based on the microbial sequencing results, Sulfuricurvum (typically present in microaerophilic and anoxic conditions) was predominant in the DZ (17.99 ± 15.4 %). Achromobacter (typical E1-degrading genus distributed in oxic environments) was more abundant in the SZ, which led to a higher E1 degradation potential in this zone. The results of this study shed light on the fate of E1 in the SWI of lakes at different water depths, facilitating a more precise control of estrogenic pollution in lake sediments.
研究领域:
环境科学
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生态学
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DOI
高影响因子
GREEN CHEMISTRY
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2022
·Vol. 24
·期 19
·7481-7491
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IF 11.034
Keyu Zhu,Qifeng Wei,Kang Liu,Huaquan Li,Xiulian Ren
The existing methods for obtaining titanium are harmful as toxic organic solvents must be used. In this paper, three magnetic ionic liquids (MILs) and five hydrophobic deep eutectic solvents (HDESs) were designed and combined for safer extraction of titanium from an HCl leachate of ilmenite (HLI). First, the physicochemical properties including density, viscosity, water content, total organic carbon, and appearance and extraction performance including efficiency, selectivity and reusability of the designed solvents were thoroughly analyzed and compared. Second, the most suitable cation to form MILs for the removal of iron and the best HDES for the extraction of titanium were defined based on sustainable chemistry metrics. The purity of the obtained titanium solution could reach 99.87% after the combined use of the selected MIL and HDES. Finally, toxicity studies on the reagents applied were performed and compared with existing methods.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
Foods
·
2023
·Vol. 12
·期 2
·310
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IF 5.2
Haiyan Li,Yugang Liu,Shiyin Guo,Meng Shi,Si Qin,Chaoxi Zeng
Extracting ursolic acid (UA) from plant resources using organic solvents is incompatible with food applications. To address this, in this study, 15 edible hydrophobic deep eutectic solvents (HDESs) were prepared to extract UA from apple peel, the extraction conditions were optimized, and the optimization strategies were compared. It was found that the solubility of UA in the HDESs can be 9 times higher than the traditional solvent such as ethanol. The response surface optimization concluded that temperature had the greatest effect on the extraction and the optimized test conditions obtained as follows: temperature of 49 °C, time of 32 min, solid–liquid ratio of 1:16.5 g/mL, respectively. Comparing the response surface methodology (RSM) and artificial neural networks (ANN), it was concluded that ANN has more accurate prediction ability than RSM. Overall, the HDESs are more effective and environmentally friendly than conventional organic solvents to extract UA. The results of this study will facilitate the further exploration of HDES in various food and pharmaceutical applications.Keywords:apple peel;ultrasonic-assisted extraction;response surface methodology;artificial neural network
研究领域:
食品科学
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药学
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化学工程
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生物技术
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DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2021
·
IF 5.645
Qihui Dong,Jun Cao,Rong Wu,Tingting Shi,Wen Zhang,Fuliang Cao,Guibin Wang,Erzheng Su
Extract of Ginkgo biloba leaves (EGb) is a widely used phytotherapy drug, while ginkgolic acids (GAs) are considered as potentially hazardous constituents in EGb. In this work, a liquid-liquid microextraction method for removing ginkgolic acids from Ginkgo biloba leaves crude extract using hydrophobic deep eutectic solvent (DES) was reported. After screening and designing, a ternary hydrophobic DES composed of l -menthol, 1-hexanol and lauric acid at a molar ratio of 1:0.8:0.2, named as MHL, gave the highest removal rate of GAs. The removal conditions were optimized based on the removal rate of GAs, and the optimal conditions were 27.5 % (v/v) of ethanol solution used as the aqueous phase for dissolving the Ginkgo biloba leaves crude extract, 180 μL of the hydrophobic DES, removal temperature of 40 °C, and removal time of 24 min, respectively. Under these conditions, the removal rate of GAs in the model EGb solution reached 74.35 ± 1.56 %. Only one step removal could reduce the GAs content in the real Ginkgo biloba leaves crude extract to 4.02 μg/g (below 5.00 mg/kg). Scaling up the removal operation volume by 100 times, the removal rate of GAs did not decrease, but even improved. The retention rates of total flavonoids and ginkgolides always kept at high levels. This work provides the basic for further considering hydrophobic DESs as green media for efficiently removing the GAs in the standardized EGb production.
研究领域:
药学
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分析化学
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植物化学
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DOI
高影响因子
LANGMUIR
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2023
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IF 3.9
Yang Wu,Junhao Jing,Xiaojiang Li,Wenjian Yue,Jie Qi,Na Wang,Hongsheng Lu
A new form of surfactant-free microemulsion (SFME) including hydrophobic deep eutectic solvent (HDES)/ethanol/water was constructed based on its CO2 response, and three regions, that is, HDES-in-water (HDES/W), bicontinuous (B.C.), and water-in-HDES (W/HDES) regions, were recognized. It is anticipated that SFMEs with tunable microstructures have outstanding applications as nanoreactors in reaction processes. The feasibility of preparing nanoparticles from HDES/ethanol/water SFME using barium fluoride (BaF2) as a model nanoparticle was investigated. HDES-based microemulsions benefit from HDES’s excellent properties (novel, low toxicity, CO2-responsive, easy availability) and have potential in universal reactions, drug delivery, advanced material fabrication, etc. In this research, HDES-based microemulsions were prepared using HDES as the oil phase. Phase equilibria and microstructure were investigated using a ternary phase diagram, UV spectrophotometry, and the conductivity method. The CO2 switchable characteristics of the HDES-based microemulsions were investigated. HDES-based microemulsions were proposed as nanoreactors for the synthesis of barium fluoride nanomaterials. The microemulsion structure can modulate the size, morphology, and physicochemical properties of the nanoparticles through the CO2 switchable properties. It is argued that nanoreactors constructed with versatile HDES will offer a new direction for creation of cutting-edge scientific applications.
研究领域:
材料科学
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纳米技术
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化学工程
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2021
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IF 7.514
Tong Wang,Qing Wang,Qing Guo,Ping Li,Hua Yang
Green extraction and separation of natural products is crucial for food industry, and has been widely concerned. Compared with hydrophilic natural products, the green extraction and separation of hydrophobic natural products is more challenging. In this work, a novel method which coupled the ultrasound-assisted extraction with high-speed countercurrent chromatography (HSCCC) separation based on hydrophobic deep eutectic solvent (DES) was proposed for hydrophobic compounds extraction and recovery. By using the developed method, the hydrophobic compounds in Rosmarinus officinalis leaves , Ginkgo biloba leaves and Salvia miltiorrhiza roots have been successfully extracted and recovered. The results indicated that hydrophobic DESs are more effective for extraction hydrophobic compounds than hydrophilic DESs and traditional solvents. And hydrophobic DESs can be used as HSCCC separation solvents to separate and recover hydrophobic compounds effectively. The infinite possibilities of DESs components and their combinations can provide inexhaustible selective space for hydrophobic compounds in the HSCCC separation process.
研究领域:
食品工业
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植物化学
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分离科学
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绿色化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2023
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IF 5.9
Xunwen Sun,Xiaodong Wu,Pengcheng Deng,Dong Tian,Yangyang Song,Jiangqi Zhao,Qingye Li,Shiyi Feng,Jian Zhang,Canhui Lu,Huawei Zou,Zehang Zhou
Cellulose nanofibers (CNF) are promising in composite functional materials, while the pulping and bleaching processes are usually needed in their production, leading to high cost and pollution. Here, a two-step liquid how water (LHW)/deep eutectic solvents (DES) pretreatment and wet mechanical grinding exfoliation strategy is employed to prepare CNF from three raw representative bulk lignocellulose materials (wheat straw, moso bamboo and poplar wood) without pulping and bleaching processes. CNF prepared from this universal approach exhibits desirable nanofibrous structure and good mechanical properties, which could serve as reinforcing and binding agents for the assembly of transition metal carbides (MXene) nanosheets to overcome their poor mechanical properties and structure stability. The obtained CNF/MXene composite film with closely stacked “mussel-like” structure exhibits enhanced mechanical properties, and demonstrates potential applications in electromagnetic interference shielding and electro-/photo-thermal heating. Furthermore, flexible and conductive CNF/MXene composite film could serve as dry electrodes to detect and monitor epidermal electrophysiological signals (electrocardiogram, electromyogram, etc.). This work provides a scalable and universal approach for the fabrication of high-performance CNF-based multifunctional materials, which is promising for the development of flexible and portable electronics.
研究领域:
材料科学
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纳米技术
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生物医学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Ning Gao,Yunbo Wang,Huixin Luo,Yingtong Xu,Jining Liu,Yingwen Chen
The accumulation of oily waste increases annually with the growth in crude oil demand. Its toxicity and high heating value present both opportunities and challenges for treatment technologies. In recent years, the emergence of hydrophobic deep eutectic solvents (HDES) has promoted advancements in low-toxicity extraction processes. Leveraging the advantages of HDES and addressing the challenges posed by real oily sawdust (with a 67.9 % oil content), this study presents a novel green HDES solvent composed of ethyl maltol and fatty acids, accompanied by a corresponding extraction process. At a low temperature of 60 °C, the process achieved impressive results: an oil extraction efficiency close to 86.3 %, a dehydration rate exceeding 92.2 %, and a heavy metal removal rate ranging from 15 % to 75 %. In the exploration of solvents recycling, pH-switching facilitated the deprotonation and protonation of phenol-fatty acid HDES, promoting effective recovery of the oil phase. Even after 5 cycles, the oil extraction rate could still be maintained above 75 %. It is worth noting that the regenerated HDES exhibited greater selectivity for extracting light oil after multiple uses. The total ratio of saturated and aromatic hydrocarbons reached approximately 81.7 %, significantly enhancing the value of the recovered oil. Integrating systematic characterization with the extraction performance, as well as the variation in recovered oil phase components, highlighted the multifaceted effects of introducing ethyl maltol. Specifically, this effect is demonstrated in its ability to enhance the oil phase’s solubility by regulating the intermolecular spacing of HDES, and to impede the dissolution of heavy oil into its gaps by optimizing the local zone through the formation of complexes with HDES and heavy metals.
研究领域:
环境科学
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化学工程
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可持续化学
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废物管理
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Lei-Tao Sha,Qiang Wu,Yi-Fan Zhang,Wei-Jia Wang,Fei Wu,Qing-Gang Huang,Ze-Yi Yan
The hydrophobic deep eutectic solvents (HDES) with low viscosity, density and environmental friendliness have been prepared and characterized based on trioctylphosphine oxide (TOPO) and N,N -dihexyl succinamic acid (DHSCA), which were used as both extractant and organic phase for highly efficient removal of radioactive elements of U(VI) and Th(IV) from rare earth (RE) leaching solution. The extraction efficiency of U(VI) and Th(IV) exceeded 99 % by a single stage extraction. Benefiting from the blocking effect of hydrogen bonding on P = O and the good affinity of DHSCA and TOPO for actinides, the present HDES exhibited the excellent extraction selectivity for U(VI) and Th(IV) over Fe(III), Al(III), Mg(II), Ca(II) and RE(III). Even after seven extraction-stripping cycles, the prepared HDES could still effectively remove radioactive U(VI) and Th(IV) from RE leaching solution. The co-extracted U(VI) and Th(IV) was further separated and enriched by two successive stripping steps. Using the slope analysis, 31 P NMR and FT-IR spectra, the stoichiometry of extracted species and the extraction mechanism of HDES to Th(IV) and U(VI) were evaluated. Due to the superior extraction efficiency, excellent environmental compatibility and sustainability, the present approach offers a practical alternative for removal of radioactive elements from rare earth minerals.
研究领域:
化学工程
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环境科学
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核化学
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材料科学
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DOI
高影响因子
Journal of Cleaner Production
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2023
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IF 11.1
Lu Huang,Yingjie Guo,Tianqi Jin,Ke Yan,Xianglin Liu,Shuyang He,Lin Li,Ye Gong,Junyi Ma,Hang Yu,Zhoumin Lu,Yupeng Liu,Wuzi Dong,Fangxia Yang
Triterpene acids (TTAs) have promising applications in functional food, medicine and other fields. Here, ultrasonic-assisted hydrophobic deep eutectic solvent (HDES) extraction was employed to gain TTAs from loquat leaves. Combining COSMO-SAC model prediction with experimental verification，the HDES, composed of thymol and benzyl alcohol (molar ratio 2:1), was proved to have the highest extraction ability for TTAs. The preliminarily optimized extraction conditions were solid to solvent ratio 1:10 (g/g), temperature 60 °C and extraction time 60 min. Under these conditions, the extraction yield of ursolic acid (the main component of loquat leaf TTAs) was 17.769 ± 0.799 mg/g dry loquat leaf. HDES and TTAs were recovered from HDES extracting solution via gradient elution (60% and 80% ethanol aqueous solution, respectively) based on C18 reverse-phase silica gel column chromatography under low pressure (0.5 MPa). Recovered HDES could be reused for extracting TTAs from loquat leaves directly and had a similar extraction performance compared to fresh HDES. The purity of the obtained crude TTAs sample was 81.18% based on the total contents of maslinic acid (MA), corosolic acid (CA), oleanolic acid (OA) and ursolic acid (UA), with a mass ratio of 11:26:10:53. Crude TTAs sample was further separated by C18 reverse-phase silica gel column chromatography using 80% ethanol aqueous solution as mobile phase under high pressure (15 Mpa). By this mean, CA sample with 69.30% purity (MA to CA mass ratio 7:18) and UA sample with 93.94% purity (OA to UA mass ratio 4:21) were obtained. The in vitro antioxidant ability order of the attained TTAs samples was CA sample > crude TTAs sample > UA sample. This study laid a good scientific basis for applying HDES and C18 reverse-phase silica gel column chromatography in the bioactive component extraction and separation fields. It also provided theoretical basis and technical support for obtainment and utilization of high-purity loquat leaf TTAs in the fields of medicine, functional food, cosmetics and so on.
研究领域:
药学
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食品科学
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分析化学
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生物技术
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产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Hai Liu,Ke Xue,Wenguang Zhu,Dingchao Fan,Zihao Dong,Yinglong Wang,Jianguang Qi,Zhaoyou Zhu,Peizhe Cui
This work introduces a sustainable and environmentally friendly process for extracting cobalt from leach solution of waste lithium-ion batteries, which can effectively reduce environmental pollution and alleviate shortage in cobalt resources. Three kinds of hydrophobic deep eutectic solvents (HDESs) were synthesized using di-(2-ethylhexyl) phosphate (DEHPA) as a hydrogen bond acceptor (HBA) and 1-butanol, 1-hexol and 1-octanol as hydrogen bond donors (HBD), which were cheap and easy to obtain and had little pollution to water. Among them, 1-butanol had the best extraction efficiency. At an extraction time of 6 min, O/A of 2:1, and pH of 5, the single extraction efficiency of 1-butanol-DEHPA for cobalt reached 95.64 %, which was higher than that when DEHPA was used alone, and the required amount of DEHPA was reduced. Furthermore, HDES exhibited good recycling ability. After five cycles of extraction, the extraction efficiency of HDES for cobalt remained above 80 %. The possible extraction mechanism was explored using the slope method, Fourier transform infrared spectroscopy , and hydrogen nuclear magnetic resonance spectroscopy . Through quantum chemical calculation and optimization, it has been demonstrated that a cation exchange exists between HDESs and cobalt ions , and non-extractive components play an important role in the extraction process. These findings will contribute to the development of environmentally friendly HDESs and improvement of cobalt recovery technology. Additionally, they will contribute to environmental protection and reduction of environmental pollution.
研究领域:
化学工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Yu-Jia Nong,Yi-Lin Zhang,Uwe Hübner,Wen-Long Wang,Qian-Yuan Wu,Nan Huang,Jörg E. Drewes,Hong-Ying Hu
Vacuum-UV (VUV) (wavelength 185 nm)/ UV (wavelength 254 nm) are applied to improve performances of UV-based advanced oxidation processes. However, the improvements were strongly affected by water depth because of poor VUV transmittance in water. In this study, VUV/UV and peroxydisulfate (PDS) were used to degrade carbamazepine. More SO 4 •− oxidation occurred in VUV/UV/PDS than VUV/UV with similar • OH oxidation occurring. The additional SO 4 •− oxidation could be caused by VUV/PDS in superficial water or UV/PDS in deeper water. The synergistic factor for VUV/UV/PDS processes relative to VUV/UV and UV/PDS processes was 1.32. VUV/UV/PDS performances were affected by competition for photon absorption by dissolved organic matter (32–58 % inhibition), radical quenching by CO 3 2− /HCO 3 − and NO 3 − , and conversion of • OH and SO 4 •− into reactive chlorine species by Cl − . Radical probe experiments and steady-state kinetic modeling simulations indicated that 34 %, 25 %, and 40 % of carbamazepine degradation occurring in 2-cm-deep bulk solution was due to • OH oxidation through VUV/H 2 O, SO 4 •− oxidation through VUV/PDS, and SO 4 •− oxidation through UV/PDS, respectively. Contribution of VUV-driven processes decreased with increasing water depth and became equivalent to contribution of 3.5-cm-deep UV-driven processes, which indicated the importance of optimizing water depth in VUV/UV-advanced oxidation process reactors.
研究领域:
环境科学
·
化学工程
·
水处理
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）