INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Yajun Hou,Shanshan Wang,Baojuan Deng,Yun Ma,Xing Long,Chengrong Qin,Chen Liang,Caoxing Huang,Shuangquan Yao
As an environmentally friendly lignocellulosic biomass separation technology, hydrothermal pretreatment (HP) has a strong application prospect. However, the low separation efficiency is a main factor limiting its application. In this study, the poplar components were separated using HP with ferric chloride and pH buffer (HFB). The optimal conditions were ferric chloride concentration of 0.10 M, reaction temperature of 150 °C, reaction time of 15 min and pH 1.9. The separation of hemicellulose was increased 34.03 % to 77.02 %. The pH buffering resulted in the highest cellulose and lignin retention yields compared to ferric chloride pretreatment (FC). The high efficiency separation of hemicellulose via HFB pretreatment inhibited the degradation of xylose . The hydrolysate was effectively reused for five times. The fiber crystallinity index reached 60.05 %, and the highest C/O ratio was obtained. The results provide theoretical support for improving the efficiency of HP and promoting its application.
研究领域:
生物质能
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林业工程
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
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2015
·
IF 3.34
Hongyu Dong,Baoyu Gao,Qinyan Yue,Yan Wang,Qian Li
Impact of pH on coagulation–ultrafiltration (C–UF) process was investigated with respect to coagulation efficiency, floc characteristics and membrane fouling in this study. Ferric chloride (FeCl 3 ) and polyferric chloride with basicity of 1.0 and 2.2 (denoted as PFC 10 and PFC 22 ) were used as coagulants and Fe (III) species in them was measured by a timed complexation spectroscopy method. Floc properties under four pH conditions were evaluated using a laser diffraction particle sizing device. Ultrafiltration experiments were conducted by a dead-end batch unit. The results showed that organic matter removal efficiency was higher under acidic conditions than under other pH conditions and turbidity removal efficiency was higher under alkaline condition. At same pH, FeCl 3 containing higher monomeric and polymeric species (Fe a and Fe b ) had better organic matter removal and higher turbidity removal efficiency was obtained by coagulants with larger percentage of polymer or colloidal species (Fe c ). Flocs formed under acidic ranges were larger, weaker and looser. At pH 4.0, 7.0 and 9.0, flocs by FeCl 3 were larger and weaker than these by PFC 10 , followed by PFC 22 . In case of FeCl 3 and PFC 10 , acidic pH conditions were helpful to reduce membrane fouling. For PFC 22 , permeate fluxes were less sensitive to pH variations.
研究领域:
环境科学
·
水处理工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiang Ke,Shuxian Tang,Zhiyun Dong,Kai Ren,Peng Yu,Xinyuan Xu,Jiaojiao Yang,Jun Luo,Jianshu Li
Development of supramolecular adhesion systems from small molecules is a promising strategy to construct adhesives integrating synthetic simplification and sophisticated properties. Here, we report a facile and green one-pot strategy for fabricating a solvent-free and dynamic supramolecular adhesive via co-heating three readily available feedstocks, a natural small biological molecule (α-lipoic acid), a natural plant polyphenol (tannic acid), and ferric chloride. The adhesive is injectable and self-healing, which can work instantly and repeatedly on various materials (e.g., polytetrafluoroethylene (PTFE)) in diverse conditions (dry, underwater, pH < 7, various ionic environments, and even in vacuum) at room temperature, showing promising applicability in complex environments. The self-strengthening of the supramolecular network with time further improves the adhesion strength of the adhesive for the glass (from about 22 kPa to exceeded 300 kPa after 28 d). More importantly, the adhesive exhibits great potentials to be applied in biomedical fields with wet environments. This ready-to-use and high-performance supramolecular adhesive, constructed by natural small molecules via an extremely facile preparation method, represents a promising universal strategy for both dry and wet adhesion.
研究领域:
材料科学
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生物学
·
医学
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产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Ya Gao,Tong Yue,Wei Sun,Dongdong He,Chenglong Lu,Xinzhuang Fu
Acid recovering and iron recycling from pickling waste acid are the desired goal of the steel mills for current ecological requirements and economic benefit. This study proposed a novel method to treatment the pickling waste acid using extraction separation of ferric chloride and hydrochloric acid , following by the spray pyrolysis of ferric chloride stripping liquor. Comparing the Ruthner method, the significant technical advantages of this method is the lower treatment load and operating costs for the spray pyrolysis process, attributing to the reuse of most hydrochloric acid without iron powder neutralizing. Different extractants (TBP, CYC, IA, OA, and PA) are compared to extract ferric ion from high-concentration hydrochloric acid solution and the optimum conditions are researched. Spectroscopic analysis is performed to characterize iron state in extractants. For the stripped solution, spray pyrolysis is employed to produce high-purity Fe 2 O 3 fine particles, meanwhile hydrochloric acid is recovered for following pickling procedure. The results showed that the effect of CYC under lower O/A ratio was better than that of TBP, and the opposite occurred at higher ratios. Three-stage extraction efficiency can reach over 80% at O/A = 2:1. The final O/A ratio of 1:1 was chosen for the stripping of iron-loaded extractants. Raman and UV–visible found that it was [FeCl 4 ] - anion that existed in Fe-loaded TBP and CYC. Spray pyrolysis at 1000 °C can obtain fine pure Fe 2 O 3 and hydrochloric acid. Eventually, a feasible technological process was put forward to recycle all chemicals and achieve zero emission of water and solid waste in the whole process.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2019
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IF 7.149
Shunke Ding,Yang Deng,Hongwei Li,Chao Fang,Naiyun Gao,Wenhai Chu
Iodinated disinfection byproducts (I-DBPs) are of particular concern in drinking water due to the more cytotoxic and genotoxic properties than their chlorinated and brominated analogs. Formation of I-DBP primarily results from the oxidation of iodide-containing waters with various oxidants and the chlor(am)ination of iodinated organic compounds in drinking water. This study first reports that ferric chloride (FeCl3) can lead to the formation of iodinated coagulation byproducts (I-CBPs) from iodide-containing resorcinol solution or natural waters. The unwanted I-CBP formation involved the oxidation of iodide by ferric ions to generate various reactive iodine species, which further oxidize organic compounds. Although the oxidation rate of iodide by FeCl3 was several orders of magnitude slower than that by chlorine or chloramine, most of the converted iodide under the ferric/iodide system was transformed into iodine and iodinated organic compounds rather than iodate. Formation of four aliphatic I-CBPs was observed, and four aromatic I-CBPs were identified by gas chromatography mass-spectrometry and theoretical calculation. Coagulation of iodide-containing waters with FeCl3 also produced I-CBPs ranging from 12.5 ± 0.8 to 32.5 ± 0.2 μg/L as I. These findings call for careful consideration of the formation of I-CBPs from coagulation of iodide-containing waters with ferric salts.
研究领域:
环境科学
·
公共卫生
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
·
2021
·
IF 2.63
Lulu Fang,Lu Liu,Xin Zhao,Fangong Kong,Honglei Chen,Shoujuan Wang
Silver nanowires were successfully prepared by polyol method using silver nitrate as silver source, ethylene glycol as solvent and reducing agent, and ferric chloride as nucleating agent and polyvinylpyrrolidone (PVP) as structure directing agent and protective agent. The obtained silver nanowires were mixed with Kraft pulp fibers and bacterial cellulose to prepare conductive paper via simple filtration process. The results indicated that the size of silver nanowires can be regulated by the dosage of ferric chloride used. At optimal dosage of FeCl3, the prepared silver nanowires can reach 20 μm length, 100 nm width, and 200 of width/diameter ratio. The adding of bacterial cellulose in preparing the conductive paper greatly enhanced the retention ratio of silver nanowires as well as the stress and strain of the conductive paper. The stress and strain of the paper with bacterial cellulose were increased by 60% and 7%, respectively, compared with that of the paper without bacterial cellulose. The maximum retention ratio and the highest recovery ratio of silver nanowires in conductive paper reached 94% and 75%, respectively. The resistance of as-prepared conductive paper was only 0.9 Ω. In conductive paper, the silver nanowires attached to the paper-based materials with cellulose fibers as the substrate, which achieved the electrical conductivity of paper-based materials. This conductive paper can be applied as antistatic, antibacterial packaging and conductive material.
研究领域:
材料科学
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纳米技术
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纤维素化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Hua Wei,Jie Ren,Aimin Li,Hu Yang
A series of cationized starch-based flocculants [i.e., starch-3-chloro-2-hydroxypropyl trimethylammonium chloride (St-WH)] with different charge densities (CDs) was synthesized by etherification and used as sludge dewatering conditioners. In this series of St-WH samples, St-WH4, with the highest CD, exhibited the optimal sludge dewaterability properties, including specific resistance of filtration, filter cake moisture content, and floc properties, because of the enhanced dual effects of charge neutralization and bridging flocculation. An inorganic coagulant, namely, FeCl 3 , was combined with the organic flocculant (St-WH) at different dosing sequences to improve the dewatering performance. In comparison with St-WH4, FeCl 3 , and polyacrylamide, used individually, as well as St-WH4 dosed before and at the same time as FeCl 3 , the combination of the starch-based flocculant fed after FeCl 3 showed better sludge dewaterability and less compressible property because of the synergistic effects of FeCl 3 followed by St-WH4. FeCl 3 and St-WH4 exhibited good coagulation effects and functioned as skeleton builders. The Pearson correlation between various components of extracellular polymeric substances (EPS) and sludge dewaterability showed that FeCl 3 could efficiently compress the protein-like components in EPS. The starch-based flocculant might exhibit not only effective bridging flocculation effects but also good affinity to polysaccharide components in EPS because of their similar structures besides to protein-like components. Thus, sludge dewaterability was substantially improved by using the combination of St-WH and FeCl 3 .
研究领域:
环境科学
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污水处理
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Mingzhu Yao,Yi Liu,Lisha Qin,Xiangyu Li,Xing Long,Chengrong Qin,Chen Liang,Caoxing Huang,Shuangquan Yao
The selective and efficient separation of hemicellulose is a challenge for utilizing lignocellulosic biomass for high-value purposes. This study reports the development of a novel homogeneous acid-catalyzed pretreatment technique based the homologous action of both FeCl 3 and 5-sulfosalicylic acid (5-SAA). The optimal separation conditions (5-SAA concentration of 7.0 %, reaction temperature of 130 ° C, FeCl 3 concentration of 0.15 mol·L −1 , and reaction time of 60 min) enabled a high hemicellulose separation efficiency of 90.68 %. The hemicellulose-derived total sugar yield was as high as 83.05 % which was increased by 30 %. Moreover, the xylose yield was increased by 10 %, and the content of oligosaccharides was triple higher than that in the single component treatment, up to 19.64 %. The depolymerization and recondensation of lignin were prevented using the 5-SAA hydrophobic structure (benzene ring structure) and hydrophilic end (−HSO 3 and −COOH). The proposed strategy is a promising approach that can enable an efficient and selective separation of hemicellulose and consequently improve the quality of biomass materials.
研究领域:
生物化学
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生物质能工程
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产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Qiuyun Fu,Wei Ding,Ruofan Liu,Yushun Jin,Yibo Wu
In the field of cationic polymerization, ferric chloride (FeCl 3 ) has demonstrated exceptional initiation activity but is plagued by inherent structural instability. Consequently, enhancing the stability of this Lewis acid catalyst while preserving its high reactivity represents a critical research challenge with significant practical implications. This study introduces a novel approach by utilizing the [FeCl 3 ∙i-Pr 2 O] complex as a co-initiator, achieving a one-step protocol for the living cationic polymerization of isobutylene (IB) to produce highly reactive polyisobutylene (HRPIB) with α-olefin content reaching up to 94 %. The research systematically investigates the polymerization kinetics by examining the effects of isopropyl ether (i-Pr 2 O) content, reaction time, solvent polarity, and monomer concentration. Through comprehensive 1 H NMR structural analysis and Gaussian 09 computational simulations, the study reveals that i-Pr 2 O plays a dual-functional role: it not only stabilizes the FeCl 3 active centers but also promotes polyisobutylene chain termination, ultimately yielding three distinct olefin-terminated polyisobutylene derivatives. Building upon this innovative polymerization strategy, the research successfully demonstrates the synthesis of a PIBVE-b-PIB-b-PIBVE triblock copolymer using the [tBuDiCumCl] [FeCl 3 ∙i-Pr 2 O] initiation system.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Interdisciplinary Medicine
·
2025
·Vol. 3
·期 5
·e70055
·
IF 13.6
Zheting Liao,Ru Lian,Shiqi Zhao,Jie Yang,Zhonghao Deng,Desheng Wu,Zhongmin Zhang,Liang Zhao
The management of osteoarthritis (OA) and osteochondral defects faces challenges due to heightened catabolic activity from pro-inflammatory mediators and a lack of reparative cells. Transforming growth factor β1 (TGFβ1) plays a crucial role in cartilage maintenance and cellular recruitment, making it a promising therapeutic target. However, the high cost and unpredictable effects of exogenous TGFβ1 limit its clinical application. Notably, TGFβ1 is primarily found in a latent form within joint tissues, especially during early injury stages. This study proposes that activating endogenous TGFβ1 may serve as an effective treatment strategy. We demonstrate that an ascorbic acid (AA) and ferric chloride (AA/Fe) Fenton reaction system can activate latent TGFβ1 in knee joint tissues. Treatment with AA/Fe-activated synovial fluid protects chondrocytes from interleukin1β-induced damage and enhances chemotactic responses in joint tissues. Intra-articular AA/Fe injections in rats significantly phosphorylated SMAD2/3 and reduced cartilage degradation. Additionally, we developed poly(lactic-co-glycolic acid) microspheres for sustained AA/Fe release within a thermosensitive or photocrosslinkable hydrogel, showing high biocompatibility. These formulations effectively prevented cartilage degeneration and promoted osteochondral repair. Our findings confirm that AA/Fe reliably activates endogenous TGFβ1, providing a novel cell-free and cost-efficient treatment approach for OA and osteochondral defects.
研究领域:
骨科学
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再生医学
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分子生物学
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药剂学
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转化医学
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炎症学
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Shengzhi Duan,Xiaowen Wu,Weihua Ao,Zhi Lei,Guoqing Leng,Minghao Fang,Zhaohui Huang,Bingcheng Luo
The incorporation of carbon materials can effectively enhance the performance of thermoelectric materials . By optimizing the thermoelectric properties of the carbon scaffold, it is possible to further improve the thermoelectric performance of the prepared carbon-based composites. To elevate the thermoelectric performance of the carbon scaffold, this work introduces a novel mesoscopic design strategy, utilizing natural flake graphite to create a three-dimensional ordered porous framework. Highly controllable anisotropic conductivity and thermal conductivity of the porous graphite skeleton were achieved, by combining sizable sodium chlorine templates (37.5–250 μm) with a natural flake graphite matrix (50–150 μm). A porous graphite with high electrical conductivity and low thermal conductivity along the vertical axis was obtained by carefully regulating the parameters. The sample demonstrated exceptional thermoelectric conversion performance, achieving a thermoelectric power factor of 12.2 μW m −1 K −2 and a figure of merit value of 28.3 × 10 −4 . Furthermore, the thermoelectric property of the samples could be greatly improved by adding a small amount of ferric chloride, with a thermoelectric power factor reaching 41.9 × 10 −4 and a thermoelectric figure of merit reaching 81.4 μW m −1 K −2 . This work provides an effective scheme for the mesoscopic regulation of porous graphite carbon structures and offers a new strategy for enhancing the performance of thermoelectric generators .
研究领域:
材料科学
·
能源转换技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2025
·
IF 6.2
He Chen,Jiaxing Wang,Zhiyuan Zhang,Shuping Zhang
The development of highly graphitized porous biochar is an important strategy for biomass utilization. In this study, an iron-catalyzed pyrolysis method assisted by plastics was proposed for the fabrication of highly graphitized porous biochar. Three types of plastics, polyethylene (PE), polypropylene (PP), and polystyrene (PS), were introduced into the iron-catalyzed graphitization process using two approaches (mixing the plastics with bamboo or introducing plastic-derived volatiles to preformed bamboo char). The addition of PS-derived volatiles resulted in the biochar sample exhibiting the lowest I D /I G ratio (1.31) and the high specific surface area (822.66 m 2 /g) among all the samples. The results demonstrated that FeCl 3 and PS-derived volatiles facilitated the formation of highly graphitized porous biochar. Finally, the mechanism of PS-assisted iron-catalyzed biomass graphitization was proposed. Ferric chloride (FeCl 3 ) acted as an activator to enhance graphitization and promoted pore formation in the biochar. The aromatic hydrocarbons from PS-derived volatiles induced the growth of graphitic structure on the surface of Fe-based species, thereby increasing the degree of graphitization. This study provides a theoretical basis for the development of highly graphitized biochar.
研究领域:
环境科学
·
材料工程
·
化学工程
·
能源技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）