ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 26
·39702-39711
·
IF 5.19
Qiao Yongzhen,Yang Weisheng,Wang Xiu,Jiao Liang,Yang Yiqin,Wang Shumei,Bian Huiyang,Dai Hongqi
When old corrugated cardboard (OCC) is returned to the paper mill for repulping and reuse, the starch, which is added to the paper surface as a reinforcement agent, is dissolved into the pulping wastewater. Most of the OCC pulping wastewater is recycled to save precious water resources; however, during the water recycling process, the accumulation of dissolved starch stimulates microbial reproduction, which causes poor water quality and putrid odor. This problem seriously affects the stability of the papermaking process and product quality. In this study, phosphomolybdic acid (H 3 PMo 12 O 40 , abbreviated as PMo 12 ) was utilized to catalyze the waste starch present in papermaking wastewater to monosaccharides, realizing the resource utilization of waste starch. The results showed that the optimized yield of total reducing sugar (78.68 wt%) and glycolic acid (12.83 wt%) was achieved at 145 °C with 30 wt% PMo 12 at pH 2, which is equivalent to 91.51 wt% starch recovered from wastewater for resource utilization. In addition, the regeneration of the reduced PMo 12 was realized by applying a potential of 1 V for 2 h. Overall, this study has theoretical significance and potential application value for resource utilization of waste starch in OCC pulping process and cleaner management of OCC waste paper.
研究领域:
环境科学
·
资源利用
·
造纸工业
✓ 已验证
DOI
PubMed
高影响因子
Chem Catalysis
·
2025
·
IF 11.6
Yingxin Ma,Xuyun Guo,Wenfang Yuan,Peinuo Yang,Yu Zhang,Wenxuan Chen,Lejuan Cai,Valeria Nicolosi,Wenlong Wang,Yang Chai,Bocheng Qiu
Electrochemical upcycling of nitrate (NO 3 − ) wastewater to ammonia offers a sustainable route for reclaiming nitrogen resources from waste. However, its practical implementation still faces substantial obstacles, including high energy input and limited selectivity. Here, we report a paired electrochemical system that combines the anodic oxidation of polyethylene terephthalate (PET) hydrolysate, specifically its ethylene glycol (EG) monomer, to glycolic acid (GA) with the cathodic reduction of NO 3 − to ammonia. All of this is made possible by the discovery of a PdCu alloy anode and a CuCo alloy cathode. Built upon experimental demonstration and a theoretical understanding of the improved CO resistance on the PdCu alloy for EG oxidation, as well as the synergy between Cu and Co for NO 3 − reduction, our paired system enables the efficient co-production of GA and ammonia from PET hydrolysate and NO 3 − -containing wastewater. This conceptual design of paired electrochemistry provides an intriguing way to synthesize high-value chemicals from waste resources.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Yadan Luo,Yan Li,Liming Cao,Jiatian Zhu,Baojuan Deng,Yajun Hou,Chen Liang,Caoxing Huang,Chengrong Qin,Shuangquan Yao
Glycolic acid has chemical properties similar to those of formic acid. Therefore, similar to formic acid pretreatment, glycolic acid pretreatment has the separation effect of hemicellulose. In this study, eucalyptus hemicellulose was effectively separated by glycolic acid pretreatment. The effects of glycolic acid concentration, temperature and time on the separation of cellulose, hemicellulose and lignin were investigated. The optimum conditions were acid concentration 5.40%, temperature 140 °C, time 3.0 h. The highest yield of xylose was 56.72%. The recovery rate of glycolic acid was 91%. Compared to formic acid, the yield of xylose increased to 10.33% while that of lignin decreased to 11.08%. It showed high selectivity for hemicellulose separation, yielding 65.48% hemicellulose with 72.08% purity. The depolymerization and repolymerization of lignin were inhibited. The integrity of the cellulose structure was preserved. It provides theoretical support for the fractional separation and high-value transformation of lignocellulosic biomass.
研究领域:
生物化学
·
生物质能
·
林业工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2017
·
IF 2.726
Qiaoyin Huang,Yang Li,Fuhong Yuan,Liping Xiao,Hongxun Hao,Yongli Wang
In this work, two different polymorphs (form 1 and form 2) of glycolide were successfully prepared and characterized. The solubility of these two polymorphs in ethyl acetate, 1-propanol, ethanol, 2-propanol and 1-butanol at temperatures from 278.15 K to 328.15 K under atmospheric pressure (0.1 MPa) was experimentally measured by using the isothermal gravimetrical method and correlated by the modified Apelblat model and the van’t Hoff equation. For all the selected solvents, the solubility curve of form 1 crossed the solubility curve of form 2 at a transition temperature in the above temperature range. Combining the results of DSC, solubility curves and dissolution data of these two polymorphs, it was confirmed that form 1 and form 2 were enantiotropic. The dissolution thermodynamic properties of glycolide form 1 and form 2 were also calculated.
研究领域:
物理化学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Natural Fibers
·
2023
·
IF 3.5
Boya Li,Kai Nie,Linlin Li,Gang Fu,Chunguo Liu,Shouwu Gao,Guangting Han,Tao Zhao,Wei Jiang
The Sesamum indicum bast contains more hemicellulose, lignin, and flaky parenchymal cells than the commonly used ramie bast, which are rigid for the degumming process. We explored a facile and greener method by using glycolic acid microwave-assisted treatment combined with alkaline treatment to effectively and low-cost prepare the high-quality Sesamum indicum single fibers. The chemical and physical properties of fibers were analyzed by chemical composition analysis, SEM, FTIR, XRD, TG, and GPC analysis. The residual gum content was decreased from 34.4% to 4.2%, resulting in a cleaner micro-surface of the Sesamum indicum fibers with increased cellulose crystallinity (75.2%–82.5%) and thermal stability (357°C–365°C). The fiber fineness (2.5 dtex) and breaking tenacity (4.9 cN/dtex) of the fibers produced by the novel treatment method exhibited the same level compared with the traditional two-step alkaline fibers. Besides, both the consumption of water and the chemicals was decreased compared with traditional degumming. This work provided a novel green and facile degumming method for processing the natural bast fibers.
研究领域:
材料科学
·
植物学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Deyu Tang,Jiaguang Zheng,Chengguo Yan,Ao Xia,Wei Kong,Arkadii Proskurin,Xiuzhen Wang
Sodium borohydride (NaBH 4 ) has long been regarded as a cost-effective hydrogen storage material with a theoretical hydrogen storage capacity of 10.6 wt%. However, its practical application is hindered by thermodynamic stability, and traditional hydrogen production from NaBH 4 required excess water, which lowered its volumetric and gravimetric capacities. In this study, for the first time, solid-state glycolic acid (GA) was used to destabilize NaBH 4 for producing hydrogen. According to the results, NaBH 4 -GA started releasing hydrogen rapidly from room temperature and more than 3.6 wt% hydrogen was produced below 100 ℃ with efficient hydrogen utilization rate of 95 %. Moreover, NaBH 4 -GA composites maintained solid-state through the entire dehydrogenation process with high volumetric capacity above 39 g H 2 L −1 . Through the evolution of bonding structures and composition in NaBH 4 -GA composites, the dehydrogenation process was further confirmed as similar to the hydrolysis process of NaBH 4 , but with no liquid appearing. This chemical process “solid-state hydrolysis” may offer potential application and novel insights in low-temperature solid-state hydrogen storage using NaBH 4 .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Baoyou Liu,Jie Tian
The efficient and environmentally friendly recovery and separation of ammonia (NH3), as a toxic substance in the environment and an indispensable chemical raw material, has always been a challenge. In the present work, natural deep eutectic solvents (DESs) based on dual solid components of glycolic acid (GA) and xylitol (XYL) were designed and synthesized as absorbents to capture ammonia efficiently and reversibly. The results showed that DESs exhibited ideal physical properties, high NH3 absorption capacity, and high NH3/CO2 selectivity. At 303.15 K and 101.33 kPa, the absorption capacity of GA+XYL (3:1) for NH3 is as high as 0.225 g NH3·(g DES)−1, which is much higher than those of ionic liquids and DESs reported so far. DES absorbs NH3 with high reversibility and can represent high absorption performance after five absorption–desorption cycles. In addition, the intrinsic absorption mechanism was analyzed using spectral characterization and quantum chemical calculation. These protic DES-based GA and XYL with high efficiency and reversible NH3 capture are expected to be promising substitutes for ammonia absorbents.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2014
·Vol. 174
·期 4
·1572-1580
·
IF 1.687
Gao Xiaoxin,Ma Zhengfei,Yang Limin,Ma Jiangquan
Burkholderia sp. EG13 with high ethylene glycol-oxidizing activity was isolated from soil, which could be used for the synthesis of glycolic acid from the oxidation of ethylene glycol. Using the resting cells of Burkholderia sp. EG13 as biocatalysts, the optimum reaction temperature and pH were 30 °C and 6.0, respectively. After 24 h of biotransformation, the yield of glycolic acid from 200 mM ethylene glycol was 98.8 %. Furthermore, an integrated bioprocess for the production of glycolic acid which involved in situ product removal (ISPR) was investigated. Using fed-batch method with ISPR, a total of 793 mM glycolic acid has been accumulated in the reaction mixture after the 4th feed.
研究领域:
生物化学
·
微生物学
·
工业生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2015
·Vol. 15
·期 6
·4462-4469
·
IF 1.556
Miao Yanping,Yang Ping,Zhao Jie,Du Yingying,He Haiyan,Liu Yunshi
CdTe quantum dots (QDs) were synthesized by 3-mercaptopropionic acid (MPA) and thioglycollic acid (TGA) as capping agents. It is confirmed that TGA and MPA molecules were attached on the surface of the QDs using Fourier transform infrared (FT-IR) spectra. The movement of the QDs in
agarose gel electrophoresis indicated that MPA-capped CdTe QDs had small hydrodynamic diameter. The photoluminescence (PL) intensity of TGA-capped QDs is higher than that of MPAcapped QDs at same QD concentration because of the surface passivation of TGA. To systemically investigate the photodegradation,
CdTe QDs with various PL peak wavelengths were dispersed in phosphate buffered saline (PBS) and Tris-borate-ethylenediaminetetraacetic acid (TBE) buffer solutions. It was found that the PL intensity of the QDs in PBS decreased with time. The PL peak wavelengths of the QDs in PBS solutions
remained unchanged. As for TGA-capped CdTe QDs, the results of PL peak wavelengths in TBE buffer solutions indicated that S2− released by TGA attached to Cd2+ and formed CdS-like clusters layer on the surface of aqueous CdTe QDs. In addition, the number of TGA on
the CdTe QDs surface was more than that of MPA. When the QDs were added to buffer solutions, agents were removed from the surface of CdTe QDs, which decreased the passivation of agents thus resulted in photodegradation of CdTe QDs in buffer solutions.
研究领域:
材料科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2025
·
IF 5.7
Zhenyuan Wang,Tie Dong,Jin Yang,Yiyu Wang,Mi Wang,Jiaheng Zhang
Due to its rich bioactivities, tranexamic acid (TA) has garnered significant attention in the biomedical and cosmetic fields. However, TA's hydrophilic nature impedes its penetration through the skin's stratum corneum. This limitation is addressed in the current study by designing a supramolecular TA, i.e., GATA, based on the non-covalent interactions between TA and glycolic acid (GA). The structure and formation mechanism of GATA are explored using multidimensional characterization techniques, including single crystal analysis and computer-aided simulations. In vitro, the supramolecular interactions within GATA facilitate deeper TA penetration into the skin, achieving >2.5 times improved transdermal permeability than pure TA. Notably, GATA does not damage the skin barrier, with the associated irritation and cytotoxicity significantly lower than that caused by GA. Moreover, compared with TA, GATA has comparable or superior thermal stability, water solubility, anti-glycation, antioxidant, and anti-inflammatory properties. GATA also exhibits excellent skin whitening efficacy. Hence, GATA is a promising alternative to TA, with enhanced permeability, bioactivity, and biosafety, as well as considerable application prospects in transdermal delivery.
研究领域:
药学
·
化妆品科学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 14
·e55186
·
IF 2.7
Yong Wang,Liang Wen,Jiajian Liu,Chuncheng Li,Tian Yin,Yaonan Xiao,Zhikui Jiang,Shaohua Wu,Zijian Zhang,Bo Zhang
Bio-based copolymers with excellent mechanical properties and biodegradability are highly desired for packaging and agricultural applications. In this work, a series of high molecular weight bio-based poly(ester-carbonate)s are synthesized using glycolic acid (GA), dimethyl carbonate (DMC), and 1,4-butanediol (BDO). The intrinsic viscosity ([ η ]) of these copolymers ranges from 0.70 to 1.11 dL/g. The tensile strength, elastic modulus, and elongation at break of PBCGA10 are 19.69 ± 2.40 MPa, 151.20 ± 37.17 MPa, and 1173 ± 142%, respectively, which are superior to the mechanical properties of PBAT. The degradation weight loss of PBCGA10 and PBCGA20 after 30 days can reach 8% and 40%, respectively, indicating excellent degradation performance of the copolymers. Moreover, copolymers undergo degradation through a surface degradation mechanism. The main products of copolymer degradation are BDO, CO 2 , and H 2 O, which do not cause harm to organisms and the environment.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Food & Function
·
2016
·Vol. 8
·期 1
·122-131
·
IF 2.686
Da Ma,Zong-Cai Tu,Hui Wang,Lu Zhang,Na He,David Julian McClements
Tyrosinase is an enzyme that promotes enzymatic browning of fruits and vegetables, thereby reducing product quality. A variety of analytical tools were used to characterize the interactions between tyrosinase and a natural tyrosinase inhibitor (glycolic acid). Hydrogen/deuterium exchange coupling with mass spectrometry (HDX-MS) was used to elucidate the interaction mechanism between glycolic acid and tyrosinase. UV-visible, fluorescence and circular dichroism spectroscopy analysis indicated that glycolic acid inhibited tyrosinase activity in a mixed-type manner with an IC50 of 83 ± 14 μM. The results of these techniques suggested that glycolic acid bound to tyrosinase through hydrophobic attraction, and this interaction led to a pronounced conformational change of the enzyme molecules. HDX-MS analysis showed that the activity of tyrosinase was primarily inhibited by a structural perturbation of its active site (His 263). This study provides a comprehensive understanding of the interaction between glycolic acid and tyrosinase, which could lead to new approaches to control tyrosinase activity in foods and other products.
研究领域:
食品科学
·
生物化学
✓ 已验证
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）