Article
Biochemistry & Molecular Biology
Xinda Li, Zhengjiang Wang, Jing Wang, Jiaqi Lu, Jin Mao, Dandan Han, Kangli Li
Summary: The solubility of thiamine nitrate in {(methanol, acetone, isopropanol) + water} solvents was investigated experimentally and found to increase with temperature. The dissolving capacity of thiamine nitrate ranked as water + methanol > water + acetone > water + isopropanol in low water ratio systems, but as water + acetone > water + methanol > water + isopropanol in high water ratio systems. Various thermodynamic models were used to correlate the solubility data, and all models gave satisfactory results. The dissolution process of thiamine nitrate in the selected solvents was determined to be endothermic.
Article
Environmental Sciences
Shengnan Ke, Jiajun Chen, Xilai Zheng
Summary: The study investigated the impact of subsurface physical barriers (SPBs) on nitrate pollution (NP) in groundwater, finding that SPBs can slow down the migration of nitrate and change the shape of contaminated areas. Additionally, the obstruction effect of cut-off walls on NP was more prominent, and factors such as hydraulic gradient and SPB height were found to be crucial in influencing NP and seawater intrusion (SWI). Therefore, the design of SPBs in coastal areas should pay particular attention to these two factors.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Jun Wang, Jun Kong, Chao Gao, Lvbin Zhou
Summary: Physical barriers, such as the mixed physical barrier (MPB), have been proven effective in preventing and controlling seawater intrusion (SWI) in coastal areas. However, the construction of MPB may lead to nitrate accumulation in coastal aquifers. This study investigated the SWI control capacity and nitrate accumulation in MPB and compared it with conventional subsurface dam and cutoff wall. The results showed that MPB is more efficient in preventing and controlling SWI, but it also leads to higher nitrate accumulation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Qiguo Sun, Tianyuan Zheng, Xilai Zheng, Marc Walther
Summary: The construction of a physical barrier can reduce nitrate discharge to the sea and lead to nitrate accumulation in upstream aquifers. The accumulation degree is influenced by various factors, including the barrier height, location, nitrate infiltration rate, concentration, inflow, and dissolved organic carbon concentration. The build-up of nitrates is a long-term process that affects denitrification due to the formation of a nitrate accumulation zone behind the barrier.
JOURNAL OF CONTAMINANT HYDROLOGY
(2021)
Article
Chemistry, Applied
Xiaoyao Du, Zhengtao Zhao, Yi Xuan Li
Summary: This research investigated the effect of pH-shifting and ultrasonication on the formation of PPI/NaCas co-dispersion and the acid coagulation properties of PPI/NaCas blends. The results showed that pH-shifting alone could not form stable PPI/NaCas dispersions, but a combination of pH-shifting and ultrasonication was successful. The dispersions exhibited excellent solubility, colloidal stability and varied gelation behavior depending on the PPI/NaCas ratio.
FOOD HYDROCOLLOIDS
(2023)
Article
Chemistry, Physical
Yameng Wan, Haixia He, Fanfan Li, Yanxun Li, Xiaoqiang Gao
Summary: The solubility data of naphazoline nitrate in four binary solvents were determined using the laser monitoring method at temperatures ranging from 278.15 K to 323.15 K. The solubility values increased with temperature and the mass fraction of the positive solvent. Four activity coefficient models provided good fitting for the solubility data. The miscibility between naphazoline nitrate and selected solvents was discussed using Hansen solubility parameters. Thermodynamic properties of the dissolution process and mixing process were evaluated using the UNIQUAC model.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Inorganic & Nuclear
A. A. Sidikov, A. S. Toghasharov
Summary: By studying the interaction of components in the NaClO3-HNO3•NH2C2H4OH-H2O system, the composition and properties of a new effective defoliant were determined.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Food Science & Technology
Chunjun Yan, Zheng Zhou
Summary: The low solubility and poor emulsifying properties of walnut protein isolate (WPI) were greatly improved through extraction and phosphorylation with sodium trimetaphosphate (STMP), resulting in phosphorylated WPI (P-WPI) with higher α-helical content and improved emulsion stability.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Basim Abu-Jdayil, Maissa Adi, Fatima Al Ghaferi, Sara Al Yahyaee, Maryam Al Jabri
Summary: The study demonstrates that bauxite residue can be effectively used as a filler with unsaturated polyester resin to develop thermal insulation and construction materials. The UPR composite containing 40% bauxite residue exhibits the optimal thermal performance among the tested mixtures.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Kai Cai, Weichang Gao, Xiang Li, Yechun Lin, Decheng Li, Wenxuan Quan, Ruijuan Zhao, Xueliang Ren
Summary: A rapid and simple method was developed for the determination of potassium (K) content in flue-cured tobacco leaves, utilizing water extraction, solid-phase extraction, and reflectometric spectroscopy based on K test strips. The method showed good linearity, with extraction recoveries of 98.0-99.5%. It can effectively measure the K content in different varieties of tobacco and can be used for quick on-farm testing.
Article
Biochemistry & Molecular Biology
David Ausin, Juan J. Parajo, Jose L. Trenzado, Luis M. Varela, Oscar Cabeza, Luisa Segade
Summary: This paper presents a comprehensive study of two alkylammonium nitrate ionic liquids and finds that the presence of water has a critical impact on physical properties involving mass or charge transport processes, with viscosity and electrical conductivity experiencing significant changes of over 40%. In contrast, refractive index, density, and surface tension show much less significant changes.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
David Ausin, Jose L. Trenzado, Mireille Turmine, Luis M. Varela, Oscar Cabeza, Elisa Gonzalez Romero, Luisa Segade
Summary: This study investigates the characterization of two protic ionic liquids (PILs), EAN and PAN, and explores the influence of inorganic nitrate salt addition on their physical properties and electrochemical potential window (EPW). Experimental measurements were conducted on mixtures of EAN or PAN with different nitrate salts at varying temperatures, and the results showed that the influence of the salt addition was mainly determined by the characteristics of the metal cations. Predictive equations were also proposed based on the experimental data to describe the physical properties of the mixtures. Additionally, the electrochemical results revealed a general order of EPW for both PILs, although exceptions were observed under certain measurement conditions and mixture properties.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Qiankun Wang, Wenzhang Chen, Cuicui Ma, Shuai Chen, Xuebo Liu, Fuguo Liu
Summary: Proteins and polysaccharides are commonly used to prepare eco-friendly packaging materials. However, films based on proteins or polysaccharides alone often have poor performance, so combining them is necessary to improve properties. In this study, enzyme technology was used to prepare films with sodium caseinate-carboxymethyl chitosan, incorporating epigallocatechin gallate as bridging molecules and antibacterial agents. The films showed improved mechanical properties, antibacterial activity, and free radical scavenging ability with the increase of epigallocatechin gallate and tyrosinase content. This work provides an efficient enzymatic method to prepare films with good strength and antibacterial properties for improving food storage quality.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Chemistry, Multidisciplinary
Rong Zhang, Ning Duan, Linhua Jiang, Fuyuan Xu, Wen Cheng, Guangbin Zhu, Wenjie Gao
Summary: Absorption spectra are essential for analyzing target chemicals qualitatively and quantitatively. In this study, phosphate anions (H2PO4 (-), HPO4 (2-), and PO4 (3-)) were analyzed based on charge-transfer spectra, and their absorption spectra were recorded using the TD-DFT method. The study revealed that the red shift in maximum absorption wavelength (λ(max)) with increased phosphate anion concentration may be due to decreased hydrogen bond interaction and significant dispersion in the short-wave region. Optical path length, spectral bandwidth, and energy through the slit were found to influence λ(max) and the correlation coefficient of the concentration-absorbance curve. The optical path length had the greatest impact on the absorption spectral characteristics. The findings provide a basis for qualitative and quantitative analysis of phosphate anions and offer theoretical references for absorption spectroscopy of other chemicals.
Article
Biochemistry & Molecular Biology
Xinglong Wang, Huiling Zhang, Xinyue Zhang, Chang Shen, Man Liu, Shanshan Liu, Yanyang Han, Tao He
Summary: This study focused on the effects of polyglycerol polymerization degree on the physical properties of alginate films. The results showed that using plasticizers with long molecular chains can improve the mechanical properties and water solubility of the films.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2024)
Article
Thermodynamics
M. E. Taboada, M. Claros, E. K. Flores, T. A. Graber, Silvia Bolado
FLUID PHASE EQUILIBRIA
(2015)
Article
Thermodynamics
Wilson Alavia, Jorge Lovera, Teofilo A. Graber
FLUID PHASE EQUILIBRIA
(2015)
Article
Materials Science, Multidisciplinary
Evelyn Melo Aguilera, Maria Cecilia Hernandez Vera, Joan Vinals, Teofilo Graber Seguel
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2016)
Article
Engineering, Chemical
C. M. Torres, M. E. Taboada, T. A. Graber, O. O. Herreros, Y. Ghorbani, H. R. Watling
MINERALS ENGINEERING
(2015)
Article
Chemistry, Physical
Angela Lamas, Ivan Brito, Fernanda Salazar, Teofilo A. Graber
JOURNAL OF MOLECULAR LIQUIDS
(2016)
Article
Crystallography
P. Taborga, I. Brito, T. A. Graber
JOURNAL OF CRYSTAL GROWTH
(2017)
Article
Engineering, Chemical
Paola G. Aguilar, Teofilo A. Graber
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2018)
Article
Metallurgy & Metallurgical Engineering
M. A. Torres, G. E. Meruane, T. A. Graber, P. C. Gutierrez, M. E. Taboada
Article
Engineering, Chemical
O. A. Rocha, M. Claros, T. A. Graber, E. K. Flores, M. E. Taboada
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2013)
Article
Thermodynamics
Wilson Alavia, Jorge A. Lovera, Brenda A. Cortez, Teofilo A. Graber
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2013)
Article
Materials Science, Multidisciplinary
Maria E. Taboada, Pia C. Hernandez, Aldo P. Padilla, Nathalie E. Jamett, Teofilo A. Graber
Summary: The study focused on the pretreatment and leaching of a mixed copper ore with varying chloride solutions containing iron. Significant effects of NaCl and curing time on copper extraction were observed, while acid and iron salts had less impact. The optimal conditions resulted in a copper extraction of 80.2%, combining 30 days of pretreatment, 25 kg/t of H2SO4, 50 kg/t of NaCl, and a specific leaching solution concentration.
Article
Chemistry, Multidisciplinary
Wilson Alavia, Dana Hermsdorf, Heike Lorenz, Teofilo A. Graber
Summary: The crystal growth of boric acid was studied using atomic force microscopy in situ, with and without the presence of sodium and lithium sulfate. The results showed that the growth mechanism involved spiral growth driven by screw dislocation. The presence of salts reduced the velocity of crystal surface steps and the relative growth rate. This reduction was attributed to the inhibition of steps advancement and the formation of sources of steps by the adsorption of salts on active sites, which was found to be anisotropic and independent of supersaturation, preferentially occurring on the (100) edge.
Article
Chemistry, Multidisciplinary
Francisca J. Justel, Maria E. Taboada, Elsa K. Flores, Hector R. Galleguillos, Teofilo A. Graber
Article
Green & Sustainable Science & Technology
M. E. Taboada, L. Caceres, T. A. Graber, H. R. Galleguillos, L. F. Cabeza, R. Rojas
Article
Metallurgy & Metallurgical Engineering
Arsyad Maulana Dzulqornain, Ana Belen Cueva-Sola, Kyeong Woo Chung, Jin-Young Lee, Rajesh Kumar Jyothi
Summary: This study presents a hydrometallurgical process for the separation of light rare earth elements (LREEs) using oxidation, precipitation, solvent extraction, and stripping techniques. Selective oxidation with potassium permanganate was employed for the separation of cerium (III). Solvent extraction with Cyanex 572 and cross-current scrubbing were used to achieve the separation of lanthanum (III) from neodymium (III) and praseodymium (III).
Article
Metallurgy & Metallurgical Engineering
Bo Chen, Shenxu Bao, Yimin Zhang
Summary: This study investigated the effects of Al, Fe, P, Si and Na on the precipitation characteristics of vanadium in the ultrasound precipitation system. The concentration upper limits and the negative influence on the precipitation kinetics were determined for each impurity. The findings provide theoretical and technical support for the industrial application of ultrasound precipitation technology.
Article
Metallurgy & Metallurgical Engineering
Chunlin He, Mingwei Qi, Yun Liu, Zunzhang Liu, Yuezhou Wei, Toyohisa Fujita, Guifang Wang, Shaojian Ma, Wenchao Yang, Junyuan Gan
Summary: In this study, D201 x 7 resin and tartaric acid were used as materials and complexing agents for the separation of germanium from sulfuric acid solution. The study successfully achieved the separation of germanium and demonstrated the high selectivity and adsorption performance of the resin.
Article
Metallurgy & Metallurgical Engineering
Xiaobo Zhu, Yue Liu, Chen Ma, Wang Li
Summary: A selective and highly effective method for the extraction and separation of V(IV) and Fe(III) using N235 and P507 as solvent extractants is proposed. The pH, composition, and concentration of the extractant mixture have significant effects on the extraction efficiency and separation factor. The mixing of P507 and N235 generates the P507 monomer, which enhances the extraction efficiency and weakens the stability of vanadium containing extraction complex. Cation exchange process forms the extraction complexes.
Article
Metallurgy & Metallurgical Engineering
B. Behnajady, J. Yousefi Seyf, S. Karimi, M. Moradi, M. Sohrabi
Summary: Deep eutectic solvents (DES) have potential as environmentally-friendly solvents for recovering metals from spent lithium-ion batteries (LIBs). Experimental and molecular dynamics simulation results showed that the chloride ions in DES can form complexes with lithium, manganese, and nickel ions, facilitating their extraction.
Review
Metallurgy & Metallurgical Engineering
Sebastian Kinas, Dorota Jermakowicz-Bartkowiak, Anna Dzimitrowicz, Piotr Cyganowski
Summary: The high demand for platinum-group metals (PGMs) and Re in economical and industrial applications related to environmental protection and energy conversion/storage has led to resource scarcity. Thus, it is crucial to recover and recycle these rare metals. This study critically reviews the recent progress in the effective recovery of PGMs and Re from materials relevant to sustainable technologies, emphasizing practical aspects, environmental impact, and issues related to the unit processes of recovery.
Article
Metallurgy & Metallurgical Engineering
Guopeng Yang, Qinggang Li, Guiqing Zhang, Mingyu Wang, Zuoying Cao, Wenjuan Guan, Jiawei Du, Shengxi Wu
Summary: The study proposes an efficient, clean, and economical process for recovering V2O5 from titanium-white waste through hydrogen peroxide stripping and precipitation of vanadium products by heating. Experimental results show that the use of D2EHPA as a modifier prolongs the duration of maximum stripping efficiency, enabling continuous operation.
Article
Metallurgy & Metallurgical Engineering
Guisu Yu, Shuainan Ni, Yun Gao, Ditang Mo, Zhiyuan Zeng, Xiaoqi Sun
Summary: This research proposes a novel green process for the selective recovery of rare earth elements (RE) from spent NdFeB permanent magnet using hydrophobic deep eutectic solvent (HDES). Through optimization of extraction conditions and stripping method, efficient and clean separation and recovery have been achieved.
Article
Metallurgy & Metallurgical Engineering
Jia Li, Xinsheng Wu, Xiaozhou Zhou, Li Zeng, Shengxi Wu, Mingyu Wang, Wenjuan Guan, Zuoying Cao, Qinggang Li, Guiqing Zhang
Summary: This paper presents a complete hydrometallurgical route for the full-component utilization of deep-sea polymetallic nodules (DPN), achieving high recovery efficiency and near-zero waste production with low energy consumption.
Article
Metallurgy & Metallurgical Engineering
Sanae Elmisaoui, Abderrazak M. Latifi, Lhachmi Khamar
Summary: A first principles model is developed to describe the dissolution mechanism of phosphate ore particles in a solution of phosphoric acid. The model accounts for non-uniform size of ore particles using particle size distributions and quantifies their influence on the model predictions. A global estimability analysis is carried out to determine the estimable parameters from experimental data, and the predictions show good agreement with the experimental data. The computed activation energy indicates that diffusion is the rate limiting step of the dissolution process.
