Article
Materials Science, Textiles
Fu Li, Pengfei Fei, Yongchun Dong, Man Zhang, Yu Feng, Shuqiang Liu, Lu Jia
Summary: This study investigated the competitive coordination of iron (III) and copper (II) ions with amidoximated polyacrylonitrile nanofiber, showing that higher initial concentration of metal ions led to increased coordination amount and a preference for Fe3+ ions. The synergistic effect between Cu2+ and Fe3+ ions improved the catalytic performance of Fe-Cu-AO-n-PAN, outperforming mono-metal complexes due to better dye adsorption and enhanced degradation process. The Langmuir-Freundlich isotherm model was the best fit for the co-coordination reaction in the binary system.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Environmental Sciences
Nazanin Mosleh, Mohsen Najmi, Ehsan Parandi, Hamid Rashidi Nodeh, Yasser Vasseghian, Shahabaldin Rezania
Summary: This study synthesized a novel binary functional adsorbent, MSP-PANI, based on sporopollenin, magnetic nanoparticles, and polyaniline, and applied it to enhance the uptake of lead ions from wastewater. The nanocomposite's functionalities, surface morphology, magnetic properties, and elemental composition were investigated. The adsorption process showed that MSP/PANI ratio of 1:1, pH 6, adsorbent dosage of 40 mg, and contact time of 90 min at room temperature were optimal. The maximum adsorption capacity for lead ions was 163 mg/g, and the adsorption mechanism was identified as physio-sorption with endothermic nature.
Article
Chemistry, Analytical
Wanhe Wang, Jianhua Liu, Lingtan Kong, Ling Wang, Dou Niu, Jing Wang, Chung-Hang Leung
Summary: A new method is presented for the one-step synthesis and real-time monitoring of iridium(III) complex-functionalized AuNPs. The functionalized AuNPs were obtained by the reduction of Au3+ ions by the alkyne group of iridium(III) complexes, with the anchoring iridium(III) complexes on the surface of the nanoparticles. Luminescence monitoring of the formation process of the functionalized AuNPs was achieved by quenching the luminescence of the iridium(III) complexes with AuNPs.
Article
Chemistry, Multidisciplinary
Tomoya Yamamoto, Tsung-Che Chang, Katsunori Tanaka
Summary: This study introduces a novel concept of a transformable protecting group that changes its properties through structural transformation. The Epoc group, developed based on this concept, can be transformed into an Fmoc-like structure with gold(iii)-catalyzed fluorene formation and removed under Fmoc-like mild basic conditions post-transformation. The Epoc group provides orthogonality to gold(iii)-labile protecting groups in solid-phase peptide synthesis and shows high turnover number of fluorene formation in aqueous media, suggesting potential applicability to biological systems.
Article
Energy & Fuels
Constant Tcheka, Daouda Abia, Bienvenu Iyedjolbo, Kovo Godfrey Akpomie, Massai Harouna, Jeanet Conradie
Summary: This study reports on the adsorption of cadmium ions from water by alkaline-treated coconut shell powder. The biosorbent was characterized and batch experiments were conducted to determine the optimal conditions and adsorption capacity. The results showed that alkaline-treated coconut shell powder is a potential biosorbent for the removal of cadmium ions from water.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Biophysics
Xianqiang Song, Xin Chen, Zhaoxiong Liang, Dan Xu, Yong Liang
Summary: This study developed a sensor platform based on gold nanobipyramids@silver nanorods for the quantitative, visual, and sensitive detection of Cr3+ ions in aqueous solutions. The method relies on the absorbance change of the nanorods induced by Cr3+ and can achieve a detection limit of 8.7 nM using a UV-vis spectrophotometer-based colorimetric detection method. The sensor shows high sensitivity, selectivity, and performance, making it useful for on-site quantitative detection of Cr3+ ions in water samples.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Chemistry, Organic
Merve Cevik Eren, Ahmet Eren, Suay Dartar, Beraat Umur Kaya, Muhammed Ucuncu, Canan Varlikli, Huseyin Caglar Karakaya, Mustafa Emrullahoglu
Summary: A BODIPY-based fluorophore decorated with a gold specific reactive handle showed exceptional selectivity towards Au3+ ions and could monitor the concentration of gold ions in a solution through a unique chemical transformation.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Organic
Merve Cevik Eren, Ahmet Eren, Suay Dartar, Beraat Umur Kaya, Muhammed Ucuncu, Canan Varlikli, Huseyin Caglar Karakaya, Mustafa Emrullahoglu
Summary: A BODIPY-based compound showed exceptional selectivity towards Au3+ ions and underwent a unique chemical transformation induced by gold catalysis, resulting in significant changes in fluorescence and absorption wavelength. The probe exhibited excellent analytical performance in solution and demonstrated potential for monitoring Au3+ ions in human cells and plants.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Analytical
Garen Suna, Eda Erdemir, Lokman Liv, Simay Gunduz, Turan Ozturk, Erman Karakus
Summary: This work presents a novel probe that shows high selectivity in detecting Au(III) ions compared to other metal species. The probe offers various advantages such as naked-eye detection, fluorescence responses, low detection limit, and rapid response.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Physical
Huiqun Niu, Hongying Yang, Linlin Tong
Summary: This study investigated the adsorption characteristics of humic acid extracted from refractory carbon-containing gold concentrate, establishing adsorption kinetic and isotherm models. Various analytical methods were used to analyze the gold-adsorbing process. Results demonstrated that the adsorption behavior of the extracted humic acid for gold followed pseudo-second-order kinetics and Freundlich model, indicating a spontaneous and endothermic process. Furthermore, the thermodynamic study showed an increase in isosteric heat of adsorption with higher adsorption amount, suggesting a chemisorption-driven process with complexation between Au (III) and functional groups.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Analytical
Wei Huang, Long Wang, Dengying Long, Xiaonan Liu
Summary: A low-cost and environment-friendly sensor was developed using label-free hydrogen doped molybdenum oxide nanoparticles as ratio probes for visual determination of gold ions (Au3+). The reduction of Au3+ to Au nanoparticles (AuNPs) by H0.3MoO3 nanoparticles resulted in a color change of the solution, enabling visual detection of Au3+. The sensor showed satisfactory detection range and limit for Au3+ and can be applied in environmental water samples. Additionally, the resulting AuNPs exhibited stability and oxidase-like activity, making them useful in various fields.
Article
Green & Sustainable Science & Technology
Yasser A. El-Amier, Ashraf Elsayed, Mohamed A. El-Esawi, Ahmed Noureldeen, Hadeer Darwish, Hala Fakhry
Summary: This study evaluated the potential of Ludwigia stolonifera root and shoot as bio-sorbents for removing lead Pb2+ and chromium Cr6+ ions, with the shoot material showing higher efficiency. Optimal conditions for removal were found to be at 100 ppm initial metal ion concentration, room temperature, and 60 minutes contact time, with results fitting well with a pseudo-second-order kinetic model. Characterization techniques such as SEM and FTIR were used to analyze the bio-sorbent material before and after metal ion bio-sorption, confirming its effectiveness in removing heavy metal ions from aqueous solutions.
Article
Engineering, Environmental
Muhammad Arif
Summary: This paper introduces a new system suitable for simultaneous removal of metal ions and organic dyes. Silica microgels surrounded by poly(N-vinylcaprolactam-acrylic acid) were created using the free radical precipitation polymerization method. The system was used to extract iron (III) ions from water and was characterized using various techniques. The resulting iron nanoparticles loaded in the microgels were found to efficiently catalyze the reduction of organic pollutants and toxic transition metal ions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Multidisciplinary Sciences
M. T. Amin, A. A. Alazba, M. Shafiq
Summary: The application of MgFe layered double hydroxides and its composites with biochar and ethylenediaminetetraacetic acid (EDTA) was found to effectively mitigate toxic lead ions from synthetic wastewater solutions. Increasing the initial lead ion concentration resulted in higher adsorption capacity, while a pH range of 2-6 enhanced both the adsorption capacity and removal rate.
Article
Chemistry, Multidisciplinary
Maria M. Castillo-Ortega, Diego Hernandez-Martinez, Irela Santos-Sauceda, Damian F. Plascencia-Martinez, Juana Alvarado-Ibarra, Jose L. Cabellos-Quiroz, Yaeel Cornejo-Ramirez
Summary: This study investigates the use of polypyrrole (PPy) in cellulose acetate (CA) membranes to recover gold complexes from aqueous solutions in an environmentally friendly manner. The results show that the CA-PPy membranes have high adsorption efficiency and can effectively recover gold complexes in the first hours of the test. These membranes have potential as substitutes for non-environmentally friendly materials.
Article
Materials Science, Biomaterials
Hembe E. Mukaya, Robyn L. Van Zyl, Natasha C. Jansen van Vuuren, Chien-Teng Chen, Xavier Y. Mbianda
INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS AND POLYMERIC BIOMATERIALS
(2019)
Article
Environmental Sciences
Tarisai Velempini, Kriveshini Pillay, Xavier Y. Mbianda, Omotayo A. Arotiba
JOURNAL OF ENVIRONMENTAL SCIENCES
(2019)
Review
Chemistry, Medicinal
Chioma G. Anusionwu, Blessing A. Aderibigbe, Xavier Y. Mbianda
MINI-REVIEWS IN MEDICINAL CHEMISTRY
(2019)
Article
Materials Science, Biomaterials
N. Dlamini, H. E. Mukaya, R. L. Van Zyl, C. T. Chen, R. J. Zeevaart, X. Y. Mbianda
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2019)
Review
Chemistry, Medicinal
Elie Hembe Mukaya, Xavier Yangkou Mbianda
MINI-REVIEWS IN MEDICINAL CHEMISTRY
(2020)
Article
Chemistry, Inorganic & Nuclear
Siphamandla B. Simelane, Monisola I. Ikhile, Derek T. Ndinteh, Xavier Y. Mbianda
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
(2020)
Article
Materials Science, Biomaterials
Anny Leudjo Taka, Bryan P. Doyle, Emanuela Carleschi, Thierry Youmbi Fonkui, Rudolph Erasmus, Elvis Fosso-Kankeu, Kriveshini Pillay, Xavier Y. Mbianda
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2020)
Article
Chemistry, Physical
Zeid A. ALOthman, Najla AlMasoud, X. Y. Mbianda, Imran Ali
Summary: In this study, a gamma-cyclodextrin-graphene oxide nanocomposite was synthesized and characterized for the removal of tetracycline and chlortetracycline antibiotics from water. The sorption parameters and kinetics were optimized, and the thermodynamics and simulation studies were conducted. The results showed high removal efficiency, and the sorption followed Langmuir, Temkin, and D-Rs models. The simulation results confirmed the sorption mechanism involving hydrogen bonding and p-p interactions.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Imran Ali, Tatiana Kon'kova, Vitalii Kasianov, Anton Rysev, Stefan Panglisch, X. Y. Mbianda, Mohamed A. Habila, Najla AlMasoud
Summary: An inexpensive nano-structured modified adsorbent prepared from natural montmorillonite was studied for its characteristics and adsorption performance in removing dioxidine antibiotics in water. The adsorbent showed good adsorption capacity and regeneration capability through catalytic oxidative destruction with hydrogen peroxide.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Biochemistry & Molecular Biology
Anny Leudjo Taka, Elvis Fosso-Kankeu, Xavier Yangkou Mbianda, Michael Klink, Eliazer Bobby Naidoo
Summary: A multifunctional nanobiocomposite polymer was developed by incorporating TiO2 and Ag nanoparticles into a cross-linked polymerization of cyclodextrin with phosphorylated multi-walled carbon nanotubes. The polymer showed potential for removing pollutants and inhibiting bacterial growth in environmental media.
Review
Biochemistry & Molecular Biology
Anny Leudjo Taka, Charlotte Mungho Tata, Michael John Klink, Xavier Yangkou Mbianda, Fanyana Moses Mtunzi, Eliazer Bobby Naidoo
Summary: Nanotechnology is the study of materials at the nanoscale, with carbon nanostructures and biopolymer-based nanocomposites showing promising properties for various applications. Human exposure to nanomaterials may have toxic effects on the environment, thus necessitating toxicological assessments for engineered nanomaterials.
Review
Energy & Fuels
Muhammad Sarfraz Arshad, Xavier Yangkou Mbianda, Imran Ali, Wanbing Guan, Tariq Kamal, Kimmo Kauhaniemi, Syed Zulqadar Hassan, Ghulam Yasin
Summary: This paper discusses the importance of nanomaterials in solid oxide fuel cells and the enhancement of active sites for electrode reactions through nanoengineering and composite approaches. The use of nanotechnology enables environmentally friendly and sustainable manufacturing processes for SOFCs. Additionally, the paper provides an overview of the applications of SOFCs, notable research institutions and companies, and future challenges and perspectives.
Article
Engineering, Environmental
A. Leudjo Taka, E. Fosso-Kankeu, K. Pillay, X. Yangkou Mbianda
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2020)
Article
Mining & Mineral Processing
Mohammed Elbushra Hassan Ahamed, Antoine Flauribert Mulaba Bafubiandi, Ljiljana Marjanovic, Xavier Yangkou Mbianda
MINERAL PROCESSING AND EXTRACTIVE METALLURGY-TRANSACTIONS OF THE INSTITUTIONS OF MINING AND METALLURGY
(2019)
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.