Article
Chemistry, Multidisciplinary
Yingjie Yang, Yingnan Yang, Chunlin He, Yuezhou Wei, Toyohisa Fujita, Zongwu Wei, Wenchao Yang, Fang Shen
Summary: This paper investigated the adsorption and desorption characteristics of cobalt, nickel, and copper in a nitrite-sulfuric acid system and explored their adsorption mechanism. The results showed that cobalt and copper had a large adsorption capacity, while nickel had weak adsorption ability. The adsorption mechanism of cobalt and copper was confirmed to be the exchange between the anionic nitro-complexes in the solution and the anions on the resin. Sulfuric acid and ammonia were selected as effective desorption agents for cobalt and copper.
SEPARATION SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Elias Costa de Souza, Alexandre Santos Pimenta, Alfredo Jose Ferreira da Silva, Paula Fabiane Pinheiro do Nascimento, Joshua O. Ighalo
Summary: In this study, the effect of nitric acid treatment on the adsorption capacity of metals by charcoal was investigated, revealing that it enhanced the adsorption capacity significantly. The Langmuir model best described the adsorption isotherms, with a maximum removal of 96% of Cu(II) ions, suggesting that adsorption was spontaneous and occurred through ion exchange and electrostatic interaction mechanisms. Additionally, the presence of multiple metal ions in the solution increased the total adsorption capacity.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Green & Sustainable Science & Technology
Mutlu Canpolat, Giray Topal
Summary: This study focuses on the synthesis and evaluation of a new polymeric adsorbent for removing Cu2+ and Co2+ ions from aqueous solutions. The polymeric adsorbent was synthesized using R-(+)-methylbenzylamine and acryloyl chloride, and its effectiveness was characterized using various methods. The obtained copolymer was used as an adsorbent and the study examined the factors affecting its adsorption efficiency.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Metallurgy & Metallurgical Engineering
Nebeal Faris, Jason White, Flynn Magazowski, Adam Fischmann, Lathe A. Jones, James Tardio, Srinivasan Madapusi, Stephen Grocott, Suresh K. Bhargava
Summary: The study revealed that during partial neutralisation, nickel and cobalt primarily occur through adsorption onto the surfaces of aluminum and iron precipitates, rather than precipitation as hydroxides. The molar ratio of aluminum to iron is a key variable controlling the loss of nickel and cobalt during the process.
Article
Chemistry, Multidisciplinary
Diana Nelli, El Yakout El Koraychy, Manuella Cerbelaud, Benoit Crespin, Arnaud Videcoq, Alberto Giacomello, Riccardo Ferrando
Summary: The solidification of AgCo, AgNi, and AgCu nanodroplets in the size range of 2-8 nm was studied using molecular dynamics simulations. Despite the surface segregation of Ag in the bulk solid, the simulations revealed clear differences in the solidification pathways. AgCo and AgNi separate in the liquid phase and solidify close to equilibrium, while AgCu remains in a kinetically trapped state and solidifies in one step. An analytical model was used to rationalize these differences and analyze the size dependence of solidification temperatures.
Article
Chemistry, Multidisciplinary
Piotr Czuprynski, Maciej Plotka, Piotr Glamowski, Witold Zukowski, Tomasz Bajda
Summary: This study aims to investigate the efficiency of an ion exchange resin system in removing Ni, Hg, and Cr from flue gas desulphurisation wastewater, considering the presence of competitive metals. The results show that the ion exchange resins can effectively remove Ni, Hg, and Cr, while having low affinity for competitive metals.
Article
Geology
S. Horn, A. G. Gunn, E. Petavratzi, R. A. Shaw, P. Eilu, T. Tormanen, T. Bjerkgard, J. S. Sandstad, E. Jonsson, S. Kountourelis, F. Wall
Summary: The study examines the cobalt resources in Europe and reveals a wide distribution of various types of cobalt-bearing deposits across the continent. Current cobalt production in Europe is mainly concentrated in Finland, with three mines being the primary sources. The Fennoscandian Shield and the Caledonian Belt in Finland, Norway, and Sweden are high priority exploration areas for cobalt-bearing deposits.
ORE GEOLOGY REVIEWS
(2021)
Article
Engineering, Environmental
Ying Wang, Zaiwen Lin, Jiahui Zhu, Jingyuan Liu, Jing Yu, Rongrong Chen, Peili Liu, Qi Liu, Jun Wang
Summary: A mixing melting method was proposed to prepare ultra-high flexibility and different proportions DAMN modified EAA resin film. The dense film structure was transformed into a porous structure with excellent adsorption performance. A hypothesis was proposed to explain the mechanism behind the improved adsorption performance of the material.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Parisa Mohammadzadeh Pakdel, Seyed Jamaleddin Peighambardoust, Nasser Arsalani, Hassan Aghdasinia
Summary: A copolymer of acrylic acid (AA) and itaconic acid (IA) grafted onto sodium carboxymethyl cellulose hydrogel (CMC-g-poly (AA-co-IA)) was successfully synthesized as an adsorbent for safranin-O removal from wastewater. The incorporation of montmorillonite clay nano-sheets (MMT) and increasing IA/AA molar ratio enhanced the swelling and removal efficiencies of the hydrogel. The CMC-g-poly (AA-co-IA)/MMT showed high removal efficiency for safranin-O and maintained stable performance after multiple recovery steps.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Guohang Zhou, Haotong Zhu, Lingwei Liu, Ming Yan, Jiexiang Zeng, Song Tang, Zijian Bai, Jianyu Jiang, Hong Zhang, Yan Wang
Summary: In this study, acrylonitrile-based adsorbents were modified by cross-linking the amino group and carboxyl group to improve stability and strength, and by reacting the cyanide group with hydroxylamine hydrochloride to enhance adsorption capacity for Cu (II). The optimized conditions for Cu (II) adsorption were 25 degrees C and pH 7, with a equilibrium time of 60 minutes. The adsorbent showed high adsorption capacity and retained a significant portion of its original capacity after multiple cycles.
Article
Polymer Science
Muhammad Amjad, Ayesha Mohyuddin, Sohail Nadeem, Wajad Ulfat, Shagufta Saeed, Nadeem Asghar, Saeed Ahmed
Summary: A novel biodegradable copolymer and nanocomposite with nickel-doped zinc oxide were synthesized via free radical polymerization, using acrylic acid and vinyl acetate as gelatin backbone and ammonium persulfate as initiator. The copolymer and nanocomposite were characterized by FTIR, TGA, and DSC, showing the successful grafting of monomers and enhanced thermal stability with the addition of nanoparticles. Both copolymer and nanocomposite exhibited weight loss over two months, with the nanocomposite showing higher resistance to soil microbes. The synthesized nanocomposite demonstrated a high adsorption capacity of 521.26 mg/g for methylene blue dye.
Article
Chemistry, Physical
Marie-Helene Pietraru, Nicolas Lentz, Louise Ponsard, Emmanuel Nicolas, Thibault Cantat
Summary: In order to reduce our reliance on fossil feedstock, alternative sources for polymeric materials have been sought in recent years. This study presents a new approach to the formation of a useful monomer for polyesters, succinic anhydride, through the catalytic carbonylation of bio-sourced acrylic acid. The use of an Earth-abundant metal catalyst, [Co-2(CO)(8)], along with a bidentate ligand, 1,2-bis(dicyclohexylphosphino)ethane (dcpe), and H-2, successfully tackles the challenging carbonylation of unsaturated carboxylic acids.
Article
Chemistry, Physical
P. V. Protsenko, M. V. Gorshenkov, S. N. Zhevnenko, V. V. Korolev
Summary: Cu(Co) solid solutions with a sub-solidus composition can form submicron-sized cobalt particles on the surface. In this study, Cu(Co) substrates with cobalt particles were produced through annealing. Wetting and spreading of lead and copper-based liquid alloys on these substrates were compared to pure copper and pure cobalt. The contact angles and spreading rates were similar between the Cu(Co) solid solution and pure copper. The presence of particles did not significantly affect the wetting behavior due to the formation of an adsorbed copper layer and compensation by increased roughness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Poonam Siwatch, Kriti Sharma, Nirmal Manyani, Ravneet Kaur, S. K. Tripathi
Summary: Nanocomposites of transition metal sulphides, such as NiCoS, ZnCoS, CuCoS, and NiZnCuCoS, have been prepared by hydrothermal synthesis method and used as supercapacitor electrode materials. The nanocomposites exhibit the formation of quantum dots with crystallite sizes ranging from 3.5 nm to 6.0 nm. Among the prepared nanocomposites, CuCoS nanocomposites showed the highest specific capacitance, while NiZnCuCoS nanocomposites exhibited the highest potential window and energy density. The multi-metal doping improved the supercapacitive behavior of transition metal sulphides.
CURRENT APPLIED PHYSICS
(2023)
Review
Chemistry, Applied
Hao Wu, Bo Qu, Thach Nguyen, Jon C. Lorenz, Frederic Buono, Nizar Haddad
Summary: This review provides a summary of recent developments in the field of nonprecious metal catalysis (NPMC) and highlights the synthetic applications covered in published research between July and October 2021. The increase in publications in NPMC indicates a widespread interest among academic and industrial research laboratories in the development and utilization of the catalytic applications of these metals.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2022)
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.