Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Bingke Tian,Chaofeng Huang,Yingshuang Zhang,Cong li,Hongru Jiang,Chongqing Wang,Hui Wang,Shangbo Zhang,Liuchuang Zhao
Plastics are extensively used in packaging, automobiles, sanitation, agriculture, and architecture due to their lightweight, malleability, corrosion resistance, and low cost. However, their short lifespan leads to the rapid accumulation of plastic waste. Therefore, recycling waste plastics is crucial to conserve resources and protect the environment from "white pollution." This study developed a flotation process to facilitate the recycling of common polyesters by separating polyamide (PA), polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), and polyurethane (PU). The flotation process was based on a hydrophilic gradient induced by modification with methanol, ethanol, and ethanolamine. The floatability sequence of the polyesters was PA < PU < PET < PC < < PMMA in the methanol-based system, PA < PU < PET < < PC ≈ PMMA in the ethanol-based system, and PET < PU < PA < < PC < PMMA in the ethanolamine-based system. The floatability of the polyesters was closely related to the reactivity of ester exchange. Based on the hydrophilic gradients, a cascaded flotation process was designed, following the ester exchange mechanism, to sequentially recover PET, PA, PC, and PMMA. PA, PET, and PU were the sinking plastics after modification with methanol, ethanol, and ethanolamine, respectively, while only PC remained hydrophilic after methanol modification. The purity of PA, PC, PET, and PMMA was 95.10 %, 93.68 %, 89.39 %, and 86.42 %, respectively, with recovery rates of 82.96 %, 83.90 %, 96.08 %, and 100 %. This study presents a promising approach for the flotation separation of waste polyesters.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Junlei Wang,Zhimin Zhao,Hanmeng Yuan,Hongshuai Gao,Yi Nie
Keratin, a naturally occurring biomaterial, has gained substantial recognition for its application in various domains. Given its abundant presence in human hair, the pursuit of efficient methods for dissolving and extracting keratin is motivated by the dual objectives of maximizing the utility of human hair and promoting ecological sustainability. In this work, a series of deep eutectic solvents (DES) were designed for extraction of keratin from human hair under mild experimental conditions. The effects of DES structure, molar ratios of HBA to HBD, dissolution temperature, and time on the dissolving ability of DES for human hair were investigated in depth. The results showed that ChCl/MEA can effectively dissolve human hair under mild conditions (80 °C, 4 h) with a solubility of 84% and a mass percentage of 20%. FT-IR, XRD, SDS-PAGE, and TGA results showed that the structure of the regenerated keratin was slightly destroyed but still exhibited stable thermal property. Analysis of the reduced density gradient (RDG) and surface electrostatic potential (ESP) verified that the hydrogen bond driven by electrostatic attraction is formed in DESs. Independent gradient model (IGMH) analysis confirmed that the weak interaction between human hair and DES is mainly caused by van der Waals interactions. Additionally, ChCl/MEA displayed an excellent performance in extracting keratin from human hair even after recycling for three cycles.
研究领域:
材料科学
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化学工程
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生物技术
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可持续化学
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DOI
高影响因子
FLUID PHASE EQUILIBRIA
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2021
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IF 2.775
Zhendong Wang,Shuo Chen,Bingxiao Feng,Hongbing Song,Meng Xiao,Hengjun Gai,Tingting Huang
Extracting phenol from coal tar has great economic significance. In this paper, a process for separating phenol from coal tar using mono-ethanolamine (MEA) as extractant was proposed, the conceptual design and optimized of the process was carried out by using Aspen Plus software. To ensure the accuracy of simulation, the vapor-liquid equilibrium data of MEA + phenol binary system were measured under different pressures. The binary interaction parameters of NRTL model, Wilson model and UNIQUAC model were fitted with the experimental data by data regression system. The results show that the deviation of NRTL model is less than that of Wilson model and UNIQUAC model. Considering that the boiling point difference between MEA and phenol is only 10°, two energy-saving schemes of double effect distillation are introduced into the conceptual process proposed in this paper, which can save 20% and 44.8% respectively compared with the traditional single tower distillation process . This paper provides reference for the industrial application of MEA in the extraction of phenol from coal tar.
研究领域:
化学工程
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分离科学
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热力学
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能源化工
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工业催化
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Hao Tong,Meizhen Jiao,Bo Mu,Bin Li,Shihao Su,Yehan Tao,Jinwen Hu,Jian Du,Jie Lu,Chenglong Fu,Haisong Wang
ETA/SW pretreatment fractionated reed into fermentable sugars and N-containing lignin. • Achieved 82.20% lignin removal under optimized pretreatment conditions • Glucose and xylose hydrolysis efficiencies reached 84.72% and 66.70%, respectively. Exploring low-cost, low-energy-consumption methods to efficiently disassemble waste biomass and achieve full utilization of multi-components in lignocellulose has always been a significant challenge in the field of biomass pretreatment. In this study, a new strategy of high-solids inorganic salt-driven seawater/ethanolamine pretreatment was proposed. During pretreatment, inorganic salt ions in seawater induce cell wall swelling, which enhances the diffusion of ethanolamine into the fiber matrix. Acting as a basic nucleophile, ethanolamine promotes lignin depolymerization while simultaneously enabling amination modification. This process effectively suppresses lignin condensation and redeposition, resulting in improved cellulose preservation. Consequently, the treated biomass exhibits enhanced cellulose accessibility and significantly improved enzymatic hydrolysis efficiency. Under the favorable conditions, the glucan retention rate and lignin removal rate reached 94.29% and 82.20% respectively. Subsequent hydrolysis with cellulase (25 FPU/g) and hemicellulase (120 IU/g) gave glucose and xylose hydrolysis efficiencies of 84.72% and 66.70%, respectively. This strategy enabled the concurrent production of fermentable sugars and N-containing lignin. Moreover, the idea of using seawater instead of freshwater to pre-treat waste biomass and realize the productization of all components provides a promising route for the advancement of biomass pretreatment technologies. Download: Download high-res image (270KB) Download: Download full-size image
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高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2026
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IF 3.6
Xinyue Wang,Haojie Qian,Caoxing Huang,Bo Fan,Yucai He,Wei Tang
This work successfully developed an alkaline deep eutectic solvent (DES) composed of cetyltrimethylammonium bromide (CTAB) and ethanolamine (EA), and systematically evaluated its performance in the pretreatment of poplar sawdust (PS). The characterization of DES indicated an extensive hydrogen-bonding network and exceptional thermal resilience. Through optimization of key pretreatment parameters, the most effective pretreatment conditions were determined to be a molar ratio of CTAB to EA at 1:8, a temperature of 160 °C, and a time of 90 min. Under these optimized conditions, the DES demonstrated remarkable fractionation performance, achieving efficient delignification (64.2%) and substantial xylan extraction (92.4%). Ultimately, the enzymatic hydrolysis achieved an exceptional efficiency of 83.9%. Structural analyses unveiled that the pretreatment profoundly amplified substrate accessibility and elevated the crystallinity index of cellulose, while simultaneously achieving efficient cleavage of pivotal interunit linkages and aromatic frameworks embedded within lignin. The dominant mechanism underpinning enhanced efficiency centered on the disruption of lignin-driven supramolecular aggregation and the potentiation of intermolecular hydrogen bonding networks, thereby enabling a more thorough and effective disassembly of the lignocellulosic architecture. This remarkable enhancement in saccharification performance not only established a robust sugar platform for ethanol fermentation from PS but also delivered profound theoretical insights and critical technological advancements for the realization of high-value biorefinery systems leveraging other hardwood feedstocks.
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高影响因子
BIORESOURCE TECHNOLOGY
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2026
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IF 8.2
Hao Tong,Bin Li,Chenglong Fu,Yehan Tao,Jinwen Hu,Jian Du,Jie Lu,Haisong Wang
OE pretreatment fractionated reed into fermentable sugars and N-lignin. • The OE system gave 82.57 % delignification and 92.36 % glucose yield. • One-pot pretreatment simultaneously enabled two lignin amination pathways. • Aminated lignin showed an N content increase from 0 to 3.93 at%. The efficient pretreatment of waste biomass to achieve effective carbohydrate conversion and high-value lignin valorization has consistently been regarded as one of the most critical challenges in the field of biomass refining. In this study, an oxygen-driven ethanolamine (OE) pretreatment strategy was developed using reed as the feedstock, enabling efficient carbohydrate recovery while simultaneously driving lignin structural transformation and in situ nitrogen functionalization via a coupled oxidative ammonolysis pathway. Under the selected pretreatment conditions (85 wt% ETA, 1 MPa O 2 , 170 °C, 30 min), the OE system achieved highly efficient biomass fractionation. Cellulose retention exceeded 90 %, while the delignification rate reached 82.57 %, substantially enhancing cellulose enrichment and enzymatic accessibility. As a result, enzymatic hydrolysis delivered a glucose yield as high as 92.36 %. Meanwhile, the nitrogen-functionalized lignin preserved most of the native lignin side-chain architecture, which confers superior practical application potential compared with highly condensed traditional kraft lignin. Overall, the OE system represents a synergistic fractionation strategy integrating efficient cellulose preservation, enhanced enzymatic hydrolysis, and functionalized lignin recovery. This work provides a new perspective for sugar-platform construction and lignin valorization in the green biorefining of lignocellulosic biomass. Download: Download high-res image (155KB) Download: Download full-size image
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2025
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IF 5.2
Lilei zhang,Ning Ma,Lin Xie,Ye Wang,Yinchao Fan,Zhiyan Xu,Jingxiao Zhang
This study investigates the thermodynamic behavior and hydrogen bonding network in N -methylpiperazine (NMP) + ethanolamine (EA) binary systems—a promising hybrid amine solvent. Density, speed of sound, and refractive index were measured at 0.1 MPa over 293.15–318.15 K. Excess and deviation properties ( V m E , k s E , and ∆ n ) calculated from experimental data reveal significant non-ideality. V m E exhibits negative deviations, indicating volume contraction driven by strong intermolecular interactions. Molecular dynamics simulations demonstrate that NMP–EA cross-interactions are dominated by O–H···N hydrogen bonds, surpassing van der Waals forces in pure components. FTIR and 1 H NMR confirm hydrogen bond reorganization, with EA's O H stretch shifting. The synergistic hydrogen bonding network enhances molecular packing, providing a mechanistic basis for optimizing low-energy-consumption CO₂ absorbents.
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高影响因子
Journal of Cleaner Production
·
2020
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IF 7.246
Yujie Li,Yixing Wang,Zhenying Liu,Luyao Jiang,Hu Yang,Zhenliang Xu
Molecular separation of dye mixtures containing the same charge remains a challenge. In the present study, we prepared a composite membrane that could efficiently separate anionic dye mixtures. Briefly, Al-Metal-organic framework (Al-MOF) nanoparticles synthesized by the ion-exchange method were used as fillers during the in-situ synthesis of ethanolamine (ETA) grafted polyacrylonitrile (PAN) membrane. The optimized composite membrane showed a high rejection of congo red (CR) from a single solution (96% rejection) and the CR/methyl orange (MO) mixture (93%/18%) solution. The flux of dye mixture solution reached 180 L m −2 h −1 , higher than many reports in the literature. The further modification on pore size (heat treatment) or surface charge (hydrolysis treatment) improved the membrane performance to separate smaller dye mixture of methyl blue (MB)/MO. Both modified membranes showed a good MB rejection (93%) and flux of 70–85 L m −2 h −1 . While for the separation of the MB/MO mixture, the heat-treated membrane showed the lowest flux and a middling rejection. The surface hydrolyzed membrane showed a better selectivity (96% MB/32% MO) and a higher flux (127 L m −2 h −1 ) than that of the entirety hydrolyzed membrane (93% MB/58% MO and flux of 78 L m −2 h −1 ), which was attributed to their different charge distribution.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Juan Zhang,Hongbo Wang,Peng Zhang,Zhaoxia Dong,Zihao Yang,Meiqin Lin,Yawen Zhou
The self-assembly behavior study of surfactants in solution is traditional but full of fascination and novelties. Here, one anionic fluorinated surfactant, perfluorinated undecanoic acid (PFUDA), was mixed with an organic amine, monoethanolamine (MEA) in aqueous solution by changing the mixing ratio of the two components at a fixed total concentration and the self-assembly behavior was investigated in detail. Notably, increasing the MEA mole fraction ( r MEA ) progressively evolved the self-assembled structures from lamellar hydrogels to vesicles exhibiting polymorphic morphologies such as spherical, polyhedral, and rod-like shapes. This structural transition was corroborated by cryo-TEM and combined SAXS/WAXS measurements. Specifically, nearly all observed spherical and polyhedral vesicles were bilayers, seldom reported in catanionic systems. Based on the results of FT-IR, 19 F NMR, and XRD measurements, the mechanism of the phase transition of the different aggregates was proposed. The phase transition was induced by the formation of the C 10 F 21 COO - - + NH 3 C 2 H 4 OH ion pairs by expanding the interfacial area occupied by the headgroups, driven by the balance of electrostatic interactions, hydrogen bonds, van der Waals forces, and hydrophobic interactions. This work will enrich the fundamental study of the self-assembly behaviors of catanionic surfactant mixtures obtained by mixing fatty acids with short chain alkyl amines.
研究领域:
软物质物理
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物理化学
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材料科学
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胶体与界面科学
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自组装
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纳米技术
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2010
·Vol. 118
·期 2
·678-684
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IF 1.203
Xufei Liu,Jie Zhou,Changbao Chen
Using tribenuron-methyl as a template and N , O -bismethacryloyl ethanolamine as a functional crosslinking monomer, a molecularly imprinted nanowire membrane was prepared over an anodic alumina oxide membrane. The nanowire fabric of the imprinted membrane was established with a scanning electron microscope and a transmission electron microscope. However, the nonimprinted particulate membrane is formed in the absence of a template. Scatchard analysis showed that an equal class of binding sites were formed in the imprinted nanowire membrane and the dissociation constant and the maximum number of these binding sites were estimated to be 1.44 × 10 −5 M and 22.7 µmol/g, respectively. The permeation experiments throughout the imprinted membrane and the nonimprinted one were carried out in a solution containing the template and its competitive analogs. These results demonstrated that the molecularly imprinted nanowire membrane exhibited higher transport selectivity for the template tribenuron-methyl than its analogs, chlorimuron-ethyl, thifensulfuron-methyl and N -(4-bromophenylcarbamoyl)-5-chloro-1H-benzo[d]imidazole-2-carboxamide. But the nonimprinted granular membrane had no permselectivity for the four substrates. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ANALYST
·
2019
·Vol. 144
·期 9
·3013-3022
·
IF 4.019
Baogang Wang,Hui Tan,Tailiang Zhang,Wenmeng Duan,Yuanqiang Zhu
N-Doped carbon dots (NCDs) were facilely synthesized by a hydrothermal method using an ethanolamine–ionic liquid (1-carboxyethyl-3-methyl imidazole chloride) gel as a precursor. The NCDs had an average particle size of 3.4 nm and were partially crystalline and abundant in amide and hydroxyl groups and pyridinic/pyrrolic nitrogen atoms on their surfaces. In water, the NCDs showed excitation- and concentration-dependent photoluminescence (PL) properties with a high salt tolerance and a quantum yield of 24.7% under 350 nm excitation. The PL of the aqueous suspension of NCDs remained stable in a pH range of 4–11 and was significantly quenched by Hg2+ and Cu2+ owing to the strong interactions between the metal ions and the surface groups and/or nitrogen atoms of the NCDs. The possible quenching mechanism was determined to be photo-induced electron transfer. By introducing the masking agents of P2O74− and S2O32− into the aqueous suspension of NCDs, two label-free “turn-off” fluorescent probes for Hg2+ and Cu2+ with a high sensitivity and selectivity were built, respectively. Moreover, the quenched NCDs–Hg2+ system could be used as a selective “turn-on” fluorescent probe for S2O32− due to the strong affinity of S2O32− to Hg2+. The above described three probes all illustrated two good linear detection ranges for Hg2+ (0–10 and 10–50 μM), Cu2+ (0–2.5 and 2.5–40 μM) and S2O32− (0–20 and 20–80 μM), and their limits of detection were calculated to be 0.076, 0.125 and 1.17 μM. The recovery tests demonstrated that the above described probes were reliable and capable of detecting corresponding ions in tap water samples with satisfactory results.
研究领域:
化学
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材料科学
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分析化学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Pan Zhang,Lemeng Wang,Chunjie Lu,Mengying Li,Shujun Yu,Dong Fu
The surface tensions of 2‑diethylaminoethanol (DEAE)‑ N ‑(2‑aminoethyl)ethanolamine (AEEA), DEAE‑ N ‑methyl‑1,3‑propane‑diamine (MAPA) and DEAE‑1,4‑butanediamine (BDA) aqueous solutions have been measured by using the BZY-1 surface tension meter. The mass fractions of DEAE and AEEA/MAPA/BDA respectively ranged from 0.300 to 0.500 and 0.050 to 0.150. The temperature ranged from 303.2 K to 323.2 K. A thermodynamic equation was proposed to model the surface tension and the calculated results agreed well with the experiments. The effects of temperature and mass fraction of amines on the surface tension were demonstrated on the basis of experiments and calculations. The surface thermodynamics including surface enthalpy and surface entropy of blended amine aqueous solutions were also determined, and their temperature and mass fraction dependences were analyzed.
研究领域:
物理化学
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溶液化学
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热力学
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表面科学
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化工材料
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DOI
高影响因子
危险品化学品经营许可证（带存储）