Article
Environmental Sciences
Yan Li, Liangmin Gao, Yu Wang, Shuo Cheng, Guowei Wu, Xuan Yang, Shunli Wan
Summary: Impregnating hydrated ferric oxide nanoparticles within biochar bearing charged oxygen-containing groups can improve adsorption performance for heavy metal cleanup, promoting dispersion and showing good adsorption selectivity. Furthermore, HNO3 treatment can enhance desorption efficiency of the adsorbent, providing a feasible regeneration method for fixed-bed column application.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Ningyi Chen, Chenhao Ni, Shuang Wu, Du Chen, Bingjun Pan
Summary: Phosphorus control is crucial for mitigating water eutrophication and addressing the scarcity of phosphorus resources. A novel nanocomposite, HNdO-PsAX, was developed for selective removal of phosphate. It exhibited stable and efficient phosphate adsorption over a wide pH range and outperformed the commercial lanthanum-based adsorbent, Phoslock. The specific Nd-P inner-sphere complexation in HNdO-PsAX contributed to its superior affinity towards phosphate. Fixed-bed treatment showed its high capacity for treating wastewater, and the feasibility of regeneration was recognized.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Elzbieta Kociolek-Balawejder, Ewa Stanislawska, Igor Mucha
Summary: Hybrid ion exchangers (HIXs) with fine Cu2O and Cu-0 particles were analyzed thermally to determine their hygroscopic water content and the effect of the copper atom's oxidation state in the deposit on thermal properties. The study found that Cu-0 was more water repellent than Cu2O, and the oxidation state of the copper atom influenced the amount of forming char in the composite materials. Additionally, under different atmospheres, the particles transformed into different phases, indicating the inorganic phase's participation in char formation and transformation during pyrolysis.
Article
Chemistry, Multidisciplinary
Agnieszka Ciurzynska, Monika Janowicz, Magdalena Karwacka, Sabina Galus, Jolanta Kowalska, Klaudia Ganko
Summary: This study investigates the impact of hybrid drying methods, including convection, microwave, and freeze-drying, on the physical properties of dried carrots. The goal is to find the best alternative to traditional freeze-drying. The study compares the color, porosity, shrinkage, water activity, dry matter content, and internal structure of carrots dried using different methods. The findings show that certain hybrid drying methods can achieve similar water activity to freeze-dried samples while reducing drying time and minimizing shrinkage.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Jooyoung Lee, Wonyoung Yang, Geunhyeong Lee, Youngsung Cho, Jooheon Kim
Summary: A continuous and oriented thermal pathway is crucial for efficient heat dissipation. The aluminum nitride/reduced graphene oxide/poly(dimethylsiloxane) (AlN/rGO/PDMS) composite material is fabricated with a 3D foam structure, achieving significantly improved thermal conductivity through a through-plane direction pathway.
Review
Biochemical Research Methods
Xinyu Liu, Yu Wang, Hailin Cong, Youqing Shen, Bing Yu
Summary: Ion chromatography has made significant progress in the analysis field, with advantages such as speed, high sensitivity, and good selectivity. In recent years, new packing materials for ion chromatography with higher sensitivity and selectivity have been developed.
JOURNAL OF CHROMATOGRAPHY A
(2021)
Article
Engineering, Chemical
Miles Ownby, David-Alexandre Desrosiers, Celine Vaneeckhaute
Summary: This study evaluated the potential of four regeneration chemistries for desorbing phosphorus from a commercially available HIX-Nano resin hybridized with iron oxide nanoparticles. The combination of recovered NH4OH and tap water showed the highest phosphorus recovery potential, with low cost, high efficiency, and minimal impact on resin longevity. This technology may offer a cost-effective and sustainable solution to the global phosphorus problem in wastewater treatment applications.
Article
Environmental Sciences
Davide Pinelli, Sara Bovina, Giorgia Rubertelli, Andrea Martinelli, Samuela Guida, Ana Soares, Dario Frascari
Summary: This study evaluated the surface characteristics and adsorption performance of HAIX LayneRT after long-term operation in secondary-treated municipal wastewater, with regenerated resin by NaOH showing significantly improved phosphorous adsorption performance. The results confirm that LayneRT is a durable, resistant, and promising media for phosphorous recovery from wastewater.
Article
Materials Science, Ceramics
Shengnan Zhai, Hongbo Wang, Jiajia Fu, Kejing Yu, Chaoran Meng
Summary: A novel method of improving the thermal protection performance of protective materials in high temperature flame environment was proposed. The prepared aramid fiber fabric reinforced hybrid silica aerogel composite (AF-HSiO2) exhibited excellent properties and significantly increased thermal protection performance.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Biochemical Research Methods
Alexandra V. Zatirakha, Christopher A. Pohl
Summary: Novel grafted anion exchangers with covalently bonded hyperbranched functional layers were prepared and evaluated for the separation of monovalent standard inorganic anions and oxyhalides. The preparation process involved grafting N-vinylformamide to the substrate surface and subsequent hydrolysis to form polymer chains with amino groups, which were used to attach hyperbranched anion-exchange layers. The effects of hyperbranching reaction cycles and crosslink distribution on selectivity were examined.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Agronomy
Guo-Liang Jiang, William Townsend, Shuxin Ren
Summary: This study aimed to find a drying method suitable for the fast evaluation of edamame nutritional profiles. Fresh seed samples of 20 soybean genotypes were dried using freeze, low- and high-heat drying methods, and their amino acid contents were analyzed by near-infrared reflectance (NIR) technology. The results showed significant differences in amino acid contents between years and genotypes, as well as between drying methods for most amino acids.
Article
Chemistry, Physical
Elettra Papa, Annalisa Natali Murri, Angelo Vaccari, Elena Landi, Valentina Medri
Summary: Geopolymer-hydrotalcite hybrid beads were successfully synthesized by functionalizing geopolymer matrix with hydrotalcite filler, resulting in beads with high reproducibility, mechanical strength, large open porosity, and specific surface area. These beads are suitable for adsorption and filtration operations in wastewater treatment due to their properties.
APPLIED CLAY SCIENCE
(2021)
Article
Engineering, Chemical
Patrick Levin, Vincent Meunier, Ulrich Kessler, Stefan Heinrich
Summary: This study investigated the influence of freezing process parameters on the formation of internal structure of frozen coffee granules and how it affects drying kinetics. Factors such as cooling temperature, scraper rotation speed, and temperature cycles were found to significantly impact ice crystal structure. The study also showed that factors like degree of supercooling, number of temperature cycles, and freezing rates can affect crystal size and drying kinetics.
Article
Chemistry, Analytical
Youliang Jiang, Qiulin Zou, Saiqiu Liu, Hanzhang Zeng, Leyan Chen, Yanhong Xiang, Jian Li, Xianwen Wu, Jianhua Wu, Lizhi Xiong
Summary: This study investigates the fast ion and electron delivery inside electrode materials for aqueous zincion hybrid batteries. Composites of LVP@C were successfully fabricated, with the LVP@C-05 sample showing the best electrochemical performance due to its excellent crystallinity and uniform particle distribution. In terms of charging-discharging and CV results, LVP@C-05 exhibited the highest initial capacity and ionic diffusion coefficient, as well as the lowest charge transfer resistance among the samples tested.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Biotechnology & Applied Microbiology
M. D. Torres, L. Lopez-Hortas, H. Dominguez
Summary: This study investigates the influence of dehydration treatment on the rheological features of carrageenan hydrogels extracted from red macroalgae. The proposed microwave treatment delivers hybrid carrageenans with enhanced rheological properties, providing a more sustainable and efficient method for carrageenan extraction.
JOURNAL OF APPLIED PHYCOLOGY
(2023)
Article
Thermodynamics
Elzbieta Kociolek-Balawejder, Ewa Stanislawska, Igor Mucha
Summary: The presence of copper compounds in anion exchangers affects the thermal decomposition process, leading to reduction of Cu(II) and increased formation of carbonizate under nitrogen atmosphere. This study highlights the importance of process conditions, deposit type, and anion exchanger structure in influencing the thermal transformations and inorganic phase composition.
THERMOCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Elzbieta Kociolek-Balawejder, Ewa Stanislawska, Igor Mucha
Summary: Hybrid ion exchangers (HIXs) with fine Cu2O and Cu-0 particles were analyzed thermally to determine their hygroscopic water content and the effect of the copper atom's oxidation state in the deposit on thermal properties. The study found that Cu-0 was more water repellent than Cu2O, and the oxidation state of the copper atom influenced the amount of forming char in the composite materials. Additionally, under different atmospheres, the particles transformed into different phases, indicating the inorganic phase's participation in char formation and transformation during pyrolysis.
Article
Chemistry, Multidisciplinary
Elzbieta Kociolek-Balawejder, Ewa Stanislawska, Irena Jacukowicz-Sobala, Marek Jasiorski
Summary: The synthesis of copper compounds with polymeric adsorbents showed that Cu2O and CuO significantly reduced the porosity of the obtained composites. Samples dried thermally lost porosity and increased bulk density, while freeze-dried samples retained typical macroporous characteristics. This reduction in porosity was mainly caused by the surface morphology and agglomeration tendency of Cu2O and CuO particles.
JOURNAL OF NANOPARTICLE RESEARCH
(2021)
Article
Polymer Science
Elzbieta Kociolek-Balawejder, Ewa Stanislawska, Irena Jacukowicz-Sobala, Igor Mucha
Summary: The research investigated the impact of cupric deposits on the thermal decomposition of carboxylic cation exchangers, revealing a shift towards lower temperatures in air and reduction to metallic copper in N-2. Unique composite materials enriched in carbonaceous matter were obtained as a result.
Article
Engineering, Environmental
Irena Jacukowicz-Sobala, Agnieszka Ciechanowska, Elzbieta Kociolek-Balawejder, Anna Gibas, Adrian Zakrzewski
Summary: The purpose of this study was to investigate the photocatalytic activity and mechanism of Cu2O-supported anion exchangers in water purification processes. The composite material exhibited complex activity towards arsenic (III) species, involving photocatalytic oxidation, chemical oxidation, and photochemical oxidation. Instrumental analyses such as X-ray photoelectron spectroscopy, and FTIR and Raman spectroscopy supported the results from chemical analyses.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Polymer Science
Agnieszka Gola, Tomasz Knysak, Igor Mucha, Witold Musial
Summary: The thermal decomposition and kinetic parameters of four polymers, PN-1, PN-05, PN-01, and PN-005, were determined by thermogravimetry (TGA/DTG) under non-isothermal conditions. N-isopropylacrylamide (NIPA)-based polymers were synthesized by the surfactant-free precipitation polymerization (SFPP) with different concentrations of the anionic initiator potassium persulphate (KPS). Thermogravimetric experiments were carried out in the temperature range of 25-700 degrees C at four heating rates, 5, 10, 15, and 20 degrees C min(-1), under a nitrogen atmosphere. Poly NIPA (PNIPA) showed three stages of mass loss during the degradation process. The thermal stability of the test material was determined. Activation energy values were estimated using Ozawa, Kissinger, Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), and Friedman (FD) methods.
Article
Chemistry, Applied
El zbieta Kociolek-Balawejder, Anna Gibas, Agnieszka Baszczuk, Marek Jasiorski, Irena Jacukowicz-Sobala
Summary: The study demonstrates the modification of anion exchangers to obtain a reactive organic polymer containing dispersed CuxS. The distribution of cuprite or tenorite within the polymeric matrix and the porous structure of the anion exchanger determine the content of CuxS. The sulphidation process converts Cu2O into CuS more efficiently and selectively compared to CuO, and the morphology of the resulting covellite particles is influenced by the porous structure of the anion exchanger.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Engineering, Environmental
Elzbieta Kociolek-Balawejder, Ewa Stanislawska, Irena Jacukowicz-Sobala, Agnieszka Baszczuk, Marek Jasiorski
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2020)