Article
Multidisciplinary Sciences
Anton Tamtoegl, Emanuel Bahn, Marco Sacchi, Jianding Zhu, David J. Ward, Andrew P. Jardine, Stephen J. Jenkins, Peter Fouquet, John Ellis, William Allison
Summary: The behavior of water monomers on a graphene surface shows cooperative motion due to repulsive forces between the monomers, increasing the monomer lifetime in a free-gas phase and inhibiting ice nucleation. These findings provide insights into the kinetic barrier of ice nucleation and offer pathways to understanding and controlling processes involved in ice formation.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Elena A. Neskoromnaya, Ruslan K. Khamizov, Aleksander V. V. Melezhyk, Anastasia E. Memetova, Elina S. Mkrtchan, Aleksander V. V. Babkin
Summary: In this study, a hydrothermal synthesis technology based on carboxymethylcellulose (CMC), graphene oxide (GO), and iron nanoparticles (FeNPs) was proposed for water purification from heavy metals. The effect of iron content on the physicochemical and adsorption properties of the materials was investigated. Characterization of the synthesized materials was performed using SEM, TEM, XRD, FTIR, and Raman spectroscopy. Adsorption studies on lead ion removal were conducted, and the influence of pH and contact time on the process efficiency was analyzed. The results showed that the material with 18% iron nanoparticles exhibited the highest adsorption capacity for Pb ions. Adsorption isotherms using Dubinin-Radushkevich and BET models confirmed the chemical interaction between extracted ions and the adsorbent surface. Desorption studies indicated the potential application of the synthesized materials for real water purification processes. The CMC/GO + Fe 18 wt% material achieved a maximum adsorption capacity of 1850 mg g-1, which is one of the highest reported for composite materials based on GO and vegetable raw material processing products.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Environmental Sciences
Yi Wang, Changqing Liu, Feifeng Wang, Qiyuan Sun
Summary: This study systematically investigated the adsorption behaviors and mechanisms of the pesticide atrazine on different types of microplastics. The results showed that the aging process and water medium parameters significantly influenced the adsorption capacities of the microplastics. Hydrophobic and electrostatic attraction played a major role in the adsorption of atrazine on pristine microplastics, while complex surface diffusion and hydrogen bonding dominated the adsorption on aged microplastics. Additionally, the desorption performance of atrazine was found to be highest in aged polyethylene microplastics.
Article
Environmental Sciences
Mengmeng Cheng, Chenxue Yao, Yan Su, Jinglei Liu, Lijian Xu, Shifeng Hou
Summary: The study developed a manganese dioxide (MnO2) membrane-type adsorbent using vacuum filtration method with graphene oxide (GO) and amino-beta-cyclodextrin (amino-beta-CD). The membrane exhibited specific selectivity and high adsorption capacity for lithium ions, successfully extracting lithium ions from seawater.
Article
Chemistry, Multidisciplinary
Masanobu Mizusaki
Summary: This study proposes a new type of polymer-sustained-alignment liquid crystal displays (PSA-LCDs) with photo-alignment layers. The fabrication process involves photo-alignment treatment and polymerization to form the polymer layer. The results show that monomers with linear structure and a relatively fast rate constant of polymerization can reduce image sticking issues.
Article
Physics, Condensed Matter
Nazanin Alirezaei Varnosfaderani, Morteza Zargar Shoushtari, Seyed Ebrahim Mousavi Ghahfarokhi
Summary: SrCo2Fe16O27 nanoparticles were prepared by auto-combustion sol-gel method for the first time, and their application in separating lead from water was investigated. The optimal conditions were found to remove 97% of lead from the solution, with 92.4% lead removed after desorption.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Physical
Hidemi Iyota
Summary: The hypothesis of the origin of negative charge at the water/air interface was further investigated, showing that specific adsorption of HCO3- ions is responsible for the negative surface charge in water and very dilute solutions. The surface density of ions in the Stern layer was numerically evaluated by measuring the equilibrium thickness of foam films formed from NaHCO3 and Na2CO3 aqueous solutions. The findings indicate that the specific adsorption ability of anion follows the order CO32- >> HCO3- > OH- >> Cl-.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Julide Hizal, Nergiz Kanmaz, Mesut Yilmazoglu
Summary: This study investigated the retention of uranyl ions using a novel, natural and cost-effective adsorbent, humic acid (HA) embedded chitosan/polyvinyl alcohol (Ch/PVA-HA) bio composite. The Ch/PVA-HA achieved the highest adsorption capacity reported in literature in a column system. The batch tests showed that the adsorption isotherm of uranyl ions changed from Freundlich to Langmuir when the surface of Ch/PVA copolymer was covered with HA. The presence of HA enhanced the distribution ratio of uranyl ions between the adsorbent phase and aqueous solution.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Multidisciplinary Sciences
Asaad F. Hassan, Radim Hrdina
Summary: The study demonstrates that functionalized silica nanospheres show high efficiency and good reusability in the removal of arsenic from water, making them suitable for various application conditions.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
T. Dambrauskas, D. Davidoviciene, K. Baltakys, A. Eisinas, A. Jaskunas, P. Siler, V. Rudelis, E. Svedaite
Summary: This study investigates the influence of adsorbed Cu2+, Co2+, and Cr3+ ions on the porosity of synthetic calcium silicate hydrate by analyzing nitrogen adsorption and desorption isotherms. The results show that the nature of intercalated metal ions strongly affects the specific surface area and porosity of the adsorbent, and the shape of pores during calcination depends on the nature of adsorbate.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
I. F. Peludhero, A. Gutierrez-Gonzalez, W. Dong, R. D. Beck, H. F. Busnengo
Summary: In this study, the dissociative sticking of methane on Pt(110)-(2x1) was reexamined using QCT calculations and SMB experiments, showing a qualitative agreement between QCT results and SMB experimental data with a moderate underestimation of experimental results by a factor of approximately 2-3.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Green & Sustainable Science & Technology
Jiashi Li, Xiaoqiang Dong, Xiaofeng Liu, Xin Xu, Wei Duan, Junboum Park, Lei Gao, Yisi Lu
Summary: This study comparatively investigated the adsorption capacities of peanut shells, sawdust, and commercial activated carbon for heavy metal ions from water. The results showed that different adsorption parameters and properties of adsorbents influenced the removal rates of heavy metal ions. The adsorption processes followed Langmuir or Freundlich isotherm models and were spontaneous heat absorption reactions. Peanut shells can be used as a green adsorbent to replace activated carbon for heavy metal ion adsorption.
Article
Chemistry, Physical
Haize Jin, Youyou Zhang, Qikun Wang, Qibing Chang, Cuixia Li
Summary: The research focused on improving the adsorption efficiency of geopolymer as an adsorbent for heavy metal ions and dyes removal. The adjustment of pH enhanced the rapid removal of methylene blue and nickel ions by exposing more negative charge adsorption sites. Additionally, the study found that the desorption of nickel ions was facilitated by a decrease in pH of the wash solution.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2021)
Article
Green & Sustainable Science & Technology
Magdalena Konczak, Milosz Huber
Summary: This study investigated the adsorption and desorption of phosphate and ammonium ions on engineered biochars derived from sewage sludge and willow. The results showed that different production conditions affected the adsorption and desorption properties of the biochars. Re-using these biochars in wastewater treatment can regulate the mobility and release rate of nutrients.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Junaid Khan, Shanshan Lin, Jean Claude Nizeyimana, Yifeng Wu, Qi Wang, Xiangru Liu
Summary: This study improved the surface quality of synthetic hematite iron oxide coated sand and evaluated its adsorption and desorption capabilities for copper ions. It was found that the coating at a lower pH resulted in higher copper ion removal efficiency, reaching 94%. Acidic solutions were identified as effective desorption media for copper ions on the surface of hematite iron oxide coated sand.
JOURNAL OF CLEANER PRODUCTION
(2021)
