INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Ke Su,Chunzhong Wei,Bin Liang,Hualin Huang,Gang Huang,Shiheng Li,Jing Liang,Kai Huang
Divalent cadmium ions in the water environment are a serious threat to human health. The purpose of this study is to develop a biodegradable bio-adsorbent based on bagasse lignin and can effectively adsorb cadmium ions. In this study, it was found that the thiol amino co-grafted lignin nanospheres (TALNPs) had been successfully prepared by the Mannich reaction system, and the performance tests indicate that TALNPs have good adsorption potential. The evaluation experiment shows that factors such as pH value, dosage, time, initial concentration, and temperature significantly affect the ability of TALNPs to adsorb cadmium ions. The simulation calculation of isothermal adsorption experiment shows that the adsorption of cadmium ions follows the Langmuir model, and the adsorption kinetics is pseudo-second order. Compared with unmodified lignin, the ability of TALNPs has increased by about 3.5 times. Using XPS to analyze the structure of TALNPs in the adsorption and desorption process shows that only the bridge bond changes, indicating that it is a relatively stable adsorbent and can be reused. In general, the design strategy of thiol-amino co-grafting to modify lignin nanospheres can enhance the adsorption of cadmium ions, and also provide a new way for the development and utilization of bagasse lignin.
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高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Huawei Su,Hongzhi Liu,Zhihao Su,Haoyue Gao,Furui Ma,Qingqing Lu,Wenchao Yan,Libin Liu
Hydrogel electrolytes with antifreezing performance and excellent mechanical properties have become a research hotspot, but the general preparation process requires time and energy consumption, limiting the scope of applications. In this work, a simple, universal, and fast gelation based on a sodium lignin sulfonate macromolecule–zinc ion (LS-Zn2+) self-catalytic system is developed. The catechol group of LS can coordinate with Zn2+ to form complexes and accelerate the establishment of reversible oxidation–reduction, which can promote the rapid polymerization of vinyl monomers by generating various free radicals (OH• and 1O2). The gelation process does not require any additional energy and can be completed within 5 min by controlling the mass fraction of LS and the concentration of Zn2+ or acids. The mechanical strength of the preferred hydrogel electrolyte can reach a tensile stress of 0.14 MPa under 1750% strain. The hydrogel electrolyte possesses an excellent conductivity of 3.67 mS cm–1 at extreme temperatures as low as −40 °C. The hydrogel electrolyte sensor can detect various parts of the human body in a wide temperature range with stable output resistance signals. This work provides a LS-Zn2+ self-catalytic method for the rapid preparation of multifunctional hydrogels.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zifan Wu,Yacong Deng,Fengyu Tian,Yidi Wang,Na Fan,Guangzheng Sun,Yichuan Li,Yuan Pan,Bin Liu,Bin Dong,Han Hu,Yongming Chai
During the fermentation of straw to produce bioethanol, enzymatic hydrolysis lignin (EHL) is generated in significant quantities, which retains the original structure of lignin and thus exhibits a great potential for the production of monophenols. Herein, we fabricated a highly dispersed Ni-Co alloy catalyst loaded on N-doped biochar (10Ni-3Co/NAC) by a deposition precipitation method, which could completely convert α-O-4, β-O-4, and 4-O-5 lignin model compounds into monomers under mild conditions. 10Ni-3Co/NAC significantly catalyzed the hydrocracking of EHL in water at 220 °C under 3 MPa of initial hydrogen pressure for 8h, achieving a total monophenol yield of 42.8 wt% and a high 2,6-dimethoxy-4-propylphenol proportion (48.5 %). The study results suggest that 10Ni-3Co/NAC possesses high adsorption and activation capacity for oxygen-containing substrates, and the interspecies electron transfer within Ni-Co alloys in 10Ni-3Co/NAC facilitates the formation of dissociated active hydrogen, which attacks the C-O group in EHL leading in the highly selective cleavage of the C-O bond to produce monophenols.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Wenchao Jia,Tianyuan Xiao,Yanzhu Guo,Pedram Fatehi,Yanning Sun,Meihong Niu,Haiqiang Shi
Condensed lignin formed during eucalyptus woodchip pre-hydrolysis adversely affects subsequent enzymatic saccharification , and phenolic additives are popular lignin condensation inhibitors. The goal of this project was to reveal the mechanisms of lignin modification by phenolic additives during woodchip pre-hydrolysis and its effects on subsequent enzymatic saccharification. The HSQC and 31 P NMR analyses confirmed that resorcinol with three electrophilic substitution of active sites could act as a cross-linking agent to promote the formation of condensed lignin, whereas 2-naphthol and sodium 2-naphthol-7-sulfonate could block benzyl carbocations and reduce the formation of condensed lignin. Interestingly, the introduction of sulfonic acid groups increased the electrostatic repulsion between enzyme and lignin as well as increased the hydrophilicity of lignin, thereby greatly reducing non-productive adsorption and physical obstacle effects. Sodium 2-naphthol-7-sulfonate as an efficient benzyl carbocations scavenger reduced the non-productive adsorption and physical obstacle effects of lignin by 82.4% and 13.3%, respectively.
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BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Haitao Yang,Mengzhen Chai,Chang Geun Yoo,Jie Yuan,Xianzhi Meng,Lan Yao
A novel efficient pretreatment system containing alkaline deep eutectic solvent (DES) and tetrahydrofuran (THF) was developed in the present study. Under pretreatment conditions of 160 ℃ and 1 h, DES-THF pretreatment was more efficient (81.61%) in cellulose digestibility improvement than DES (choline chloride/monoethanolamine, 67.54%). To further explore lignin structural transformation and lignin-cellulase interaction after pretreatment, milled wood lignin (MWL) was extracted and characterized. Compared with DES-MWL, DES-THF-MWL showed an increased carboxyl group content (24.0%) and decreased condensed phenolic hydroxyl content (9.1%). In DES-MWL, β-O-4 content was 21.79%, while in DES-THF-MWL, β-O-4 accounted for 45.45%, indicating that the addition of THF alleviated cleavage of β-O-4 alkyl ether bonds. Fluorescence emission spectroscopy results showed that quenching mechanism of DES-THF-MWL and cellulase was dynamic, which was different from other lignin. Compared with DES-MWL, decreased K a between DES-THF-MWL and cellulase indicated decreasing interaction between them. DES-THF pretreatment provides a novel pretreatment method for bioenergy.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jie Huang,Xuejun Liu,Ding Yuan,Xiaolan Chen,Minghui Wang,Meiyue Li,Lixue Zhang
Lignin upgrading to various functional products is promising to realize high-value utilization of low-cost and renewable biomass waste, but is still in its infancy. Herein, using industry waste lignosulfonate as the biomass-based carbon source and urea as the dopant, we constructed a heteroatom-doped porous carbon nanosheet structure by a simple NaCl template-assisted pyrolytic strategy. Through the synergistic effect of the NaCl template and urea, the optimized lignin-derived porous carbon catalyst with high content of active nitrogen species and large specific surface area can be obtained. As a result, the fabricated catalysts exhibited excellent electrocatalytic oxygen reduction activity, as well as good methanol tolerance and stability, comparable to that of commercial Pt/C. Moreover, rechargeable Zn-air batteries assembled with this electrocatalyst have a peak power density of up to 150 mW cm -2 and prominent long-term cycling stability. This study offers an inexpensive and efficient way for the massive production of highly active metal-free catalysts from the plentiful, inexpensive and environmentally friendly lignin, offering a good direction for biomass waste recycling and utilization.
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BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Wenxuan Wu,Peiwen Zhu,Liping Luo,Hongyan Lin,Yuheng Tao,Lingyu Ruan,Liqun Wang,Qing Qing
Deep eutectic solvent (DES) is a newly-emerged green solvent for efficient pretreatment of lignocellulosic feedstock. To improve the component fractionation performance of neutral DES , p- toluenesulfonic acid ( p- TsOH) was employed as catalyst to form a novel ternary DES with benzyltriethylammonium chloride (TEBAC) and glycerol (Gly) for pretreatment of soybean straw. Under the optimum reaction conditions (TEBAC:Gly = 1:12, 1.6 wt% p- TsOH and reacted at 90 °C for 160 min), the lignin and hemicellulose removal from soybean straw were amounted to 92.0 % and 88.2 %, respectively. The pretreated substrate showed satisfactory enzymatic hydrolysis performance, as the glucose and reducing sugar concentrations reached 37.3 g/L and 42.3 g/L, respectively, after 72 h saccharification under the action of cellulase with a relatively low enzyme loading of 10 FPU/g cellulose. This method provides an efficient and mild route for utilization of agricultural waste and production of platform monosaccharides.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shenglei Hu,Yuqing Liao,Xinru Ding,Can Jin,Wentao Bi
In this study, a deep eutectic solvent (DES) was utilized for the one-step mild preparation of a magnetic lignin-based carbon-rich material, C-AL@Fe 3 O 4 , for the removal of malachite green (MG). The key factors influencing the preparation process and adsorption performance were systematically examined, including the water content in DES, lignin/DES ratio, reaction temperature, and reaction time. Characterization confirmed the successful synthesis of C-AL@Fe 3 O 4 with enhanced magnetic and adsorption properties. Adsorption experiments demonstrated an endothermic chemisorption process towards MG dye, with a monolayer Q max of 529.02 mg/g, driven by electrostatic interactions, hydrogen bonding, and π-π interactions. Moreover, C-AL@Fe 3 O 4 exhibited selective and reusable adsorption performance for cationic dyes. This study presents a green method for the one-pot mild preparation of magnetic lignin-based carbon-rich materials with promising adsorption performance, offering potential for wastewater treatment and enhancing the use of lignin resources. This adheres to the “4S workflow” (converting sustainable/recyclable resources into biodegradable sustainable products, using sustainable technology throughout the process to create a sustainable environment).
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BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Xinyue Zhao,Yuting Zhang,Hanyi Jiang,Hailian Zang,Yue Wang,Shanshan Sun,Chunyan Li
Vanillin is a natural flavoring agent that is widely used in the bioengineering industry. To enable sustainable development, joint consideration of bacterial performance and negative environmental impacts are critical to vanillin biosynthesis. In this study, a cold shock protein (csp) gene was upregulated for maintaining stable growth in Arthrobacter sp. C2 responding to vanillin and cold stress. Furthermore, the recombinant strain C2 was constructed by simultaneously deleting the xylC gene encoding benzaldehyde dehydrase and overexpressing the pchF gene encoding vanillyl alcohol oxidase and achieved a maximum vanillin productivity of 0.85 mg/g DCW/h with alkaline lignin as the substrate. Finally, this process generated an environmental impact value of 25.05, which was the lowest environmental impact achieved according to life cycle assessment (LCA). Improvement strategies included reducing electricity consumption and replacing chemicals. This study achieved the development of an effective strategy, and future studies should focus on precise vanillin biosynthesis methods for large-scale application.
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JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Tianqi Zhao,Kun Zhang,Junwei Chen,Xiaobai Shi,Xu Li,Yanli Ma,Guizhen Fang,Shiyu Xu
To mitigate the serious ecological problems and risks to human health that are posed by heavy metals in the soil, it is important to enhance the efficiency of heavy metal extraction by washing contaminated soil using chemical methods. Secondary pollution of soil by chemical chelating agents has, however, brought a new threat to the environment. Here, we describe a biodegradable LBPAA (lignin based poly(acrylic acid)) composite that was designed as a chelating agent to wash soil contaminated with Cu 2+ , Zn 2+ , Cd 2+ and Pb 2+ ions. Extraction and ion transfer of heavy metal ions by the LBPAA composite improved the remediation rate of contaminated soil during water leaching. After washing five times, the LBPAA-assisted elution process reduced the amount of Cu 2+ , Zn 2+ , Cd 2+ and Pb 2+ ions in contaminated soil to 22.57%, 52.60%, 13.63% and 17.95%, respectively. These values are 2.39-fold, 5.04-fold, 5.04-fold and 1.31-fold, respectively, better than elution with deionized water. Additionally, LBPAA is able to sequester Cd 2+ and Pb 2+ ions from the contaminated soil and transfer them to the eluent. In summary, this work provides a safe, environmentally friendly and sustainable remediation strategy for heavy metal-contaminated soil and demonstrates a new application for lignin in the field of soil remediation.
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BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Zhen Wu,Xinxu Zhao,Jun Zhang,Xun Li,Yu Zhang,Fei Wang
In this study, a mixture solvent of ethanol/1,4-dioxane/formic acid (FA) is firstly reported to efficaciously depolymerize industrial lignin to produce high-value added phenolic monomers, in which 1,4-dioxane acts as lignin solvent, ethanol acts as solvent, reactant and in situ hydrogen donor, and FA acts as acid catalyst and in situ hydrogen donor. The effects of solvent composition and reaction conditions on the lignin conversion and product yields were explored, resulting in a low residue yield of 6.57% and a high phenolic monomers yield of 22.4% at 300 °C for 2 h when Kraft lignin was depolymerized in the mixture solvent of ethanol/1,4-dioxane/FA (10:10:2, v/v). Moreover, possible reaction mechanism on lignin depolymerization in the mixture solvent was illustrated, suggesting a favorable synergistic effect among the three components of the mixture solvent. In addition, the satisfactory applicability of the mixture solvent was approved through the feedstock adaptability and recyclability experiments.
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高影响因子
GREEN CHEMISTRY
·
2020
·Vol. 22
·期 19
·6415-6423
·
IF 9.48
Qiang Yu,Zhenlong Song,Xiaoyan Chen,Jiajun Fan,James H. Clark,Zhongming Wang,Yongming Sun,Zhenhong Yuan
The low reactivity of lignin limits its performance in terms of selective oxidative cleavage of the C–C bond and most researchers employ lignin models as substrates for producing useful small molecules while the uses of real lignin are largely limited to low value material applications. Herein, a methanol/choline chloride (MeOH–ChCl)-based deep eutectic solvent (DES) was used to improve the solubility of lignin and the redox potential of the catalyst Cu(OAc)2/1,10-phenanthroline. A high total yield of acetovanillone and acetic acid (87.12%) was obtained from alkaline lignin under mild conditions of 60 °C for 3 h. Two-dimensional heteronuclear single-quantum coherence nuclear magnetic resonance (2D-HSQC NMR) spectra indicated that condensation and depolymerisation reactions of side chain groups of alkaline lignin occurred simultaneously, and longer side chains may inhibit acetic acid formation, while more guaiacyl units may increase the acetovanillone yield. Additionally, this catalytic oxidation system has the potential to produce acetovanillone and acetic acid from DES extracted lignin, pretreated corncob and raw materials of corncob.
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