Article
Engineering, Environmental
Dong Fang, Xueliu Xu, Rui Bao, Renzhuo Wan, Fan Yang, Jianhong Yi, Taofang Zeng, Olim Ruzimuradov
Summary: Sodium vanadate (Na5V12O32) nanowires, produced by hydrothermal synthesis, show a high removal rate of 93.6% for harmful lead ions (Pb2+) from aqueous solutions, with the highest removal capacity of about 2170 mg g(-1). This investigation presents a highly potential method for removal of heavy metal ions from aqueous solutions using vanadate nanowires.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Xing Fang, Wenying Yuan, Yu Xiong, Xinhong Qiu
Summary: This study demonstrates that rectorite modified by gemini surfactant can be used as an adsorbent for the removal of hexavalent chromium in water. The adsorption capacity of gemini surfactant-modified rectorite for hexavalent chromium was found to be higher than that of other surfactant-modified rectorite. The ultrasound-assisted synthesis also affected the adsorption capacity of rectorite modified with a high ratio of gemini surfactant.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Biotechnology & Applied Microbiology
Zhou Hui, Xie Yi, Xuqian Wang, Yang Huan, Yabo Wang, Yongkui Zhang
Summary: Aluminum-doped hydroxyapatite (Al-HAP) was synthesized as an efficient adsorbent for uranium removal from aqueous solution, showing good adsorption performance and reusability, and having potential for practical application.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Optics
Zahra Saedi, Mahmoud Roushani, Roghayeh Khaleghian-Moghadam, Amin Darabi
Summary: In this study, a fluorescent dye named TMU-16 was reported for the highly sensitive and selective detection of Cu2+ in aqueous solution. The fluorescence quenching of TMU-16 was achieved through the cation exchange mechanism between Cu2+ and Zn2+. The possible quenching mechanism of Cu2+ on the fluorescence sensing of TMU-16 was elucidated by various analytical techniques.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Multidisciplinary
Dalal Alezi, Julius J. Oppenheim, Patrick J. Sarver, Andrei Iliescu, Bhavish Dinakar, Mircea Dinca
Summary: The development of a tunable MOF for efficient atmospheric water capture across a range of uptake humidity conditions is a significant challenge. By controlling the metal and coordinating anion, the water uptake capacity can be increased and the relative humidity can be modulated.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Hongying Tang, David Aili, Ramato Ashu Tufa, Mikkel Rykaer Kraglund, Qiqi Wu, Chao Pan, Lars N. Cleemann, Qingfeng Li
Summary: The study focuses on the anion conductivity of cation exchange membranes used for electrochemical reduction of CO2 in alkaline media, finding that the conductivity of hydroxide and bicarbonate ions is crucial for the process.
SOLID STATE IONICS
(2022)
Article
Nanoscience & Nanotechnology
Chen Li, Xiyan Li, Xiaowang Liu
Summary: This study reports the tuning of optical attributes of lanthanide-doped nanoparticles through simultaneous binary cation exchange, enabling both upconversion and downshifting emissions. The use of Tb3+ ions also helps maintain the integrity of the nanoparticles.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Environmental
Tomohito Kameda, Kazuya Horikoshi, Fumihiko Kitagawa, Shogo Kumagai, Yuko Saito, Masayuki Kondo, Yoichi Jimbo, Toshiaki Yoshioka
Summary: This study demonstrates that using strong-acid cation exchange resin and layered double oxide separately for NH4+ and lactate adsorption helps with the removal of metabolites in cell culture. Simultaneous use of both materials could not effectively remove lactate and NH4+, but separate use in two stages proved to be significantly effective.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Materials Science, Characterization & Testing
Ying Wang, Zhiqing Lai, Xueying Yang, Gang Li
Summary: In this study, CuO-loaded cation exchange resin composites were successfully prepared with macroporous cation exchange resins as carriers under thermostatic oscillation and hydrothermal conditions. The composites exhibited an obvious shell-core structure. The micro morphology of CuO and the percentage content of Cu element were affected by the different amounts of NaOH. XRD characterization revealed that the products were monoclinic crystal system CuO species with a grain size of about 16 nm. The photocatalytic activity of CuO@CER-1g remained good after 6 cycles, and the decrease in degradation rate was attributed to the combined effect of ion exchange resins adsorption and the electron-hole pairs formed by CuO, as well as a series of free radical transfer reactions under ultraviolet light.
POLYMERS & POLYMER COMPOSITES
(2023)
Article
Engineering, Chemical
J. H. Vinco, A. B. Botelho Junior, H. A. Duarte, D. C. R. Espinosa, J. A. S. Tenorio
Summary: This study investigated the behavior of four ion exchange resins in the selective recovery of vanadium from an acid solution containing iron as an impurity. The chelating resins showed higher selectivity for vanadium, with better fitting to Langmuir isotherm, indicating potential for obtaining pure vanadium solutions in larger scale operations. Positive values of Delta H0 indicated endothermic nature of vanadium adsorption, while negative Delta G0 values revealed a spontaneous character of adsorption process for both metals to all resins.
MINERALS ENGINEERING
(2022)
Article
Polymer Science
Pan Liu, Zheng Chi, Ganhui Shi, Hao Dong, Chenchen Ma, Xuegang Chen
Summary: The hydrophilic sensor exhibits visible color changes when chelating with specific metal ions, enabling real-time monitoring. Different metal ions elicit varied fluorescence responses in aqueous solution with the copolymer.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Electrochemistry
Shota Ito, Masatoshi Sugimasa, Yuichi Toshimitsu, Akihiro Orita, Masaki Kitagawa, Masanori Sakai
Summary: When iodide ions are oxidized electrochemically in a high concentration aqueous solution, an iodine film is formed on the electrode surface. The effect of adding organic compounds as additives to the iodine film was investigated. Aprotonic organic compounds increased the current of iodide oxidation, while protonic organic compounds did not. Theoretical calculations showed that the aprotonic organic compounds promoted hydration of iodine molecules in the iodine film, leading to its dissolution.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Nafiseh Khodabakhshloo, Bhabananda Biswas
Summary: In this study, modified composites using Iranian zeolite and diatomaceous earth were developed and found to have stronger adsorption capacity for PFOS. The adsorption of PFOS onto the material was mainly due to electrostatic and hydrophobic interactions. This research provides insights into the adhesion mechanisms of PFOS onto untreated and surfactant-altered zeolite and diatomaceous earth in aquatic environments.
APPLIED CLAY SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Lei Wang, Mohammad Torkamanzadeh, Ahmad Majed, Yuan Zhang, Qingsong Wang, Ben Breitung, Guang Feng, Michael Naguib, Volker Presser
Summary: Electrochemical ion separation is a promising technology for recovering valuable ionic species from water. This study investigates the selective behavior of Ti3C2Tz MXene towards alkali and alkaline earth cations. The results show that Ti3C2Tz exhibits a time-dependent selectivity feature, preferring K+ in the early stage and ultimately preferring Ca2+ and Mg2+.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Biochemistry & Molecular Biology
Elodie Khetsomphou, Francesco Deboli, Mateusz L. Donten, Laurent Bazinet
Summary: Hierarchical cation-exchange membranes (hCEMs) were fabricated and evaluated for NaCl demineralization in the food industry. The performances of different coating chemistries and crosslinking degrees were compared to a high performing CEM benchmark. Promising results were obtained, suggesting the potential application of these hCEMs as an alternative for whey demineralization and complex products in the food industry.