Article
Environmental Sciences
Chuqing Yao, Yaodong Dai, Shuquan Chang, Haiqian Zhang
Summary: Novel Prussian blue tetragonal nanorods were prepared by template-free solvothermal methods for the removal of radionuclide Cs and Sr. The results showed that the Prussian blue nanorods exhibited better adsorption performance, high crystallinity, and good stability under alkaline conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Minsun Kim, Jeong-Hyun Park, Jong-Myoung Lim, Hyuncheol Kim, Soonhyun Kim
Summary: In this study, Prussian blue analogues (PBAs) were synthesized using different metal ions and combined with TiO2 for the removal of radioactive Cs+. The adsorption efficiency of Cs+ was found to be highest for NiFe-PBA and NiFe-TiO2, with enhanced performance observed under UV irradiation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Jueun Kim, Jaehyuk Kang, Wooyong Um
Summary: This study successfully synthesized Prussian blue functionalized layered double hydroxide (PB-LDH) to remove both Cs+ and IO3- from mixed waste solutions. The removal mechanism of Cs+ involved redox coupled alkali metal ion transport, while IO3- was mainly removed through ion exchange with intercalated Cl- and the redox effect of Co ions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Sung-Joon Park, Seung Su Shin, Joon Hee Jo, Chan Hee Jung, Hosik Park, You-In Park, Hyung-Ju Kim, Jung-Hyun Lee
Summary: A new Cs-adsorptive membrane was developed using compactly assembled Cs-adsorptive Prussian blue particles. This membrane demonstrated effective Cs removal and excellent performance in removing radioactive Cs, making it suitable for treating actual radioactive wastewater.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Youngkyun Jung, Ung Su Choi, Young Gun Ko
Summary: Prussian blue (PB) has been known for its selective sequestration of radioactive cesium ions due to its cage size similar to cesium ions. In this study, securely anchored PB nanocrystals on the surface of millimeter-sized porous polyacrylamide (PAAm) spheres (PB@PAAm) have been prepared, showing efficient cesium adsorption capacity and high selectivity against interference ions.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Ei Ohara, Tetsuro Soejima, Seishiro Ito
Summary: Commercially available Prussian blue-based compounds have been found to rapidly remove Cs+ at low concentrations, even in seawater. The removal mechanisms involve simple adsorption and ion exchange processes.
INORGANICA CHIMICA ACTA
(2021)
Article
Chemistry, Analytical
Prem C. Pandey, Hari Prakash Yadav, Shubhangi Shukla, Roger J. Narayan
Summary: This study utilized PB nanoparticle-modified SPE for the detection and efficient removal of cesium cations, achieving a maximum adsorption capacity of 325 mg.g(-1) and a distribution coefficient of 580 L.g(-1) for Cs+ removal. The ion exchange process in the PB nanoparticle-modified SPE induced a cesium adsorption-dependent chronoamperometric signal based on electron transfer.
Article
Engineering, Chemical
Lihong Zhang, Yun Li, Nana Lin, Zhuhong Zhang, Jianing Zhou, Shubin Yang
Summary: Copper ferrocyanide/magnetic montmorillonite composites with excellent Cs+ adsorption properties and chemical stability were successfully prepared. They are safe and low-toxic to human hepatocytes, making them promising for radioactive wastewater treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Jiangbo Huo, Guoce Yu, Jianlong Wang
Summary: The 3D rGO/PBAs composite showed excellent adsorption performance towards Cs(I) with high selectivity. The adsorption process was characterized by pseudo second-order kinetic model and Langmuir isotherm model, suggesting homogeneous monolayer chemisorption nature.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Mai Ngoc Nguyen, Muhammad Yaqub, Seongbeom Kim, Wontae Lee
Summary: Water-soluble and insoluble Prussian blue (PB), named PB-sol and PB-insol, were synthesized to investigate cesium (Cs+) removal from aqueous solution. Various factors affecting adsorption, such as pH, competitive ions, initial Cs+ concentration, and kinetics, were studied. The PBs' performance was optimized using a gene expression programming (GEP) model, with promising results for both PB-sol and PB-insol.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Physical
Narges Dehbashi Nia, Seung-Woo Lee, Sungjun Bae, Tae-Hyun Kim, Yuhoon Hwang
Summary: This study successfully modified a polypropylene non-woven filter with O-2 plasma treatment and acrylic acid to enhance cesium adsorption, achieving a promising means for advanced water treatment filters.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Chemical
Shanshan Feng, Jie Ni, Xun Cao, Jingshuai Gao, Lu Yang, Wenhao Jia, Feng Chen, Sheng Feng, Yao Zhang, Fang Ma
Summary: In this study, magnetic Prussian blue nanospheres (MPBNs) were developed as an effective adsorbent for the removal of cesium ions from wastewater. The MPBNs showed spherical shape with rough surface, and their adsorption process followed Freundlich isotherm and quasi-second-order kinetics. The adsorption capacity of MPBNs was controlled by the diffusion step in particles. Moreover, MPBNs could be easily separated from water by a magnetic field, making them suitable for engineering applications in cesium-containing wastewater.
Article
Engineering, Environmental
Shangqing Chen, Xiaonan Yang, Zheng Wang, Jiayin Hu, Senjian Han, Yafei Guo, Tianlong Deng
Summary: In this study, a novel PBA@ZnTi-LDH material was synthesized for efficient removal of Cs+ from wastewater, exhibiting high adsorption and post-separation capability when granulated with calcium alginate. Furthermore, this material showed promising prospects for Cs+ removal from real-world wastewater.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Younggyo Seo, Yuhoon Hwang
Summary: Prussian blue (PB) immobilized on granular activated carbon (GAC) through covalent organic polymer (COP) grafting showed excellent stability, high cesium adsorption capacity, and potential for application in water treatment systems. The method proved effective in both artificial and actual river water samples, as well as in continuous column experiments.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Zhenglin Li, Zhuhong Zhang, Jianbo Cheng, Qingzhong Li, Baozhen Xie, Yun Li, Shubin Yang
Summary: This research focused on the application of PBAs in cesium elimination, particularly in alkaline solutions. By incorporating MR, the stability of PZH in alkaline solutions was improved, leading to a significant increase in Cs+ adsorption capacity. The composite material exhibited low cytotoxicity in human hepatic cells, indicating its potential for cesium adsorption and decorporation applications.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Environmental Sciences
Hisashi Tanaka, Masayuki Fujimoto, Kimitaka Minami, Akira Takahashi, Durga Parajuli, Takehiko Hiwatari, Masami Kawakami, Tohru Kawamoto
Summary: A highly selective adsorbent based on copper hexacyanoferrate was developed to recover ammonium ions from sewage water, demonstrating stable performance with the ability for repeat use.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Physical
Nan Zhang, Tohru Kawamoto, Hiroshi Watanabe, Yong Jiang, Zhenya Zhang, Zhongfang Lei, Durga Parajuli
Summary: The study demonstrated that CoHCF is effective in selectively uptaking potassium from seawater, with the ability to undergo desorption and regeneration through electrochemical methods. The gradual decrease in adsorption capacity due to redox changes of cobalt and iron in the material was observed, while spectroscopic results indicated the valence change of transition metals and exchange of alkali metal cations during different operation stages.
Article
Green & Sustainable Science & Technology
Mianqiang Xue, Bin-Le Lin, Kiyotaka Tsunemi, Kimitaka Minami, Tetsuya Nanba, Tohru Kawamoto
Summary: A life cycle assessment of ReNOx was conducted for the first time, revealing that under specific conditions the environmental performance may be affected by factors such as feedstock format change, adsorption material deterioration, and recovery rate decline, leading to an increase in the eco-index. However, in an optimized scenario with renewable energy sources and increased conversion rates, the environmental impact of ReNOx was significantly reduced.
Article
Environmental Sciences
Hatsuho Usuda, Koji Sakurai, Akira Takahashi, Tohru Kawamoto, Kimitaka Minami
Summary: The study utilized copper hexacyanoferrate adsorbent to desorb ammonia and turn it into a reusable form, demonstrating that adsorbed ammonia can desorb into saturated ammonium hydrogencarbonate solution. The precipitation of NH4HCO3 was confirmed, providing a new pathway for the recovery of ammonia from waste gas.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Multidisciplinary
Akira Takahashi, Kimitaka Minami, Keiko Noda, Koji Sakurai, Tohru Kawamoto
Summary: By utilizing new selective adsorbents, solid-state ammonium bicarbonate can be harvested from the air in a piggery, enabling the utilization of air as a resource and reducing harmful chemicals in the air.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Editorial Material
Chemistry, Physical
Durga Parajuli
Editorial Material
Geochemistry & Geophysics
Zenixole R. Tshentu, Durga Parajuli
Article
Biochemistry & Molecular Biology
Hatsuho Usuda, Yoshie Mishima, Tohru Kawamoto, Kimitaka Minami
Summary: Prussian blue analogs (PBAs) are promising materials for ammonia (NH3) adsorption with high capacity. In this study, we investigated the adsorption/desorption behavior of six types of PBAs and found that copper ferricyanide had the highest desorption/adsorption ratio. X-ray diffraction results showed high structural stability for cobalt hexacyanocobaltate and nickel ferricyanide, while Fourier transform infrared spectroscopy results indicated that NH3 adsorbed on vacancy sites desorbed more easily.
Article
Nanoscience & Nanotechnology
Yuta Shudo, Setsuko Numano, Tohru Kawamoto, Akira Takahashi
Summary: Conventional methanol recovery and purification processes are energy-intensive. A new selective adsorbent, manganese hexacyanocobaltate (MnHCC), has been developed to efficiently remove and reuse methanol from waste gas. MnHCC exhibits a higher methanol adsorption capacity and lower energy requirement compared to activated carbon. It allows for the recovery of pure methanol at reduced energy consumption. MnHCC is reusable and stable, making it a promising solution for methanol recycling and low-cost purification.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Green & Sustainable Science & Technology
Kiyotaka Tsunemi, Tohru Kawamoto, Hideyuki Matsumoto
Summary: This study proposes a nitrogen recycling system that can collect and recycle nitrogen compounds from industrial waste gases, wastewater containing livestock effluent, and household wastewater. Different scenarios are analysed to estimate the global flows of anthropogenic nitrogen in 2050 and assess their impact on the largest planetary boundary problem. The combination of agricultural and industrial countermeasures, including the use of nitrogen-to-ammonia (NTA) technologies, can achieve a significant reduction in nitrogen emissions below the planetary boundary.
Article
Chemistry, Multidisciplinary
Akira Takahashi, Yasuhito Matsubayashi, Atsushi Sakurai, Yutaka Sugiyama, Keiko Noda, Tohru Kawamoto
Summary: Surface-modified Prussian blue exhibits 10(2) times higher bulk proton conductivity (0.018 S cm(-1)) compared to unmodified Prussian blue. The enhancement is attributed to the monolayer adsorption of Na-4[Fe(CN)(6)] on the nanoparticle surface, leading to reduced surface resistance. Surface modification is an effective strategy for improving bulk proton conductivity.
CHEMICAL COMMUNICATIONS
(2023)
Article
Engineering, Environmental
Nagy L. Torad, Ramon Kanai, Kohei Ishikawa, Ryuichi Kamimura, Tohru Kawamoto, Hisashi Tanaka
Summary: This study presents a new monitoring method for the rapid assessment and quantification of low levels of radioactive cesium in Fukushima seawater. The method utilizes Prussian blue analogue nanoparticle slurries to achieve high recovery of cesium in the presence of competing ions.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2022)
