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Journal articles on the topic 'Metal ions'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 August 2024

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1

KAJIYAMA, Tetsuto, Shohei SAKAI, Jun INOUE, Toru YOSHINO, Satoshi OHMURO, Kensuke ARAI, and Hisao KOKUSEN. "Synthesis of a Metal Ion Adsorbent from Banana Fibers and Its Adsorption Properties for Rare Metal Ions." Journal of Ion Exchange 27, no. 3 (2016): 57–62. http://dx.doi.org/10.5182/jaie.27.57.

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2

Djunaidi, Muhammad Cholid, and Khabibi Khabibi. "Potential Adsorption of Heavy Metal Ions by Eugenol Compounds and Derivatives through Ion Imprinted Polymer." Jurnal Kimia Sains dan Aplikasi 22, no. 6 (October 21, 2019): 263–68. http://dx.doi.org/10.14710/jksa.22.6.263-268.

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Research on the potential of Ion Imprinted Polymer (IIP) selective adsorption of heavy metals using eugenol compounds and their derivatives has been carried out. Isolation and synthesis of eugenol derivatives with metal selective active groups and their use as selective metal carriers have been carried out with satisfactory results. Carrier effectiveness can still be improved by methods that focus on the target molecule recognition model. This adsorption method is called Ion Imprinted Polymer (IIP). The main components of IIP are functional monomers, crosslinkers, and target molecules. The use of acrylamide and its derivatives as functional monomers is useful with a lot of success achieved but also invites danger because it includes carcinogenic substances, a nerve poison, and so on. Moreover, the N group, which is an active acrylamide group, and its derivatives are only selective towards borderline metals (HSAB theory). Alternatives that are safe and can increase their selectivity are therefore needed. Eugenol, with its three potential functional groups, is believed to be able to replace the function of acrylamide and its derivatives that can even increase the effectiveness of IIP. The purpose of this study is to determine the potential of eugenol derivatives as selective adsorbents through the IIP method. This synthesis of IIP involved the use of basic ingredients of eugenol and its derivatives (polyeugenol, EOA, polyacetate). Each base material is contacted with a metal template then crosslinked with three kinds of crosslinking agents, namely EGDMA, DVB, and bisphenol. IIP is formed after the metal template is released using acid/HCl. The outcomes obtained demonstrate that the IIP method is able to increase the metal adsorption capacity and that the IIP method for metals is largely determined by the release of metals, which will form a hole for metal entry through adsorption. Poly-Cd-DVB, Eug-Cr-DVB, Poly-Cu-bisphenol, Polyacetate -Cr-DVB are polymer materials that have the potential to make up an IIP.

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3

ROUHI, A. MAUREEN. "Escorting Metal Ions." Chemical & Engineering News 75, no. 45 (November 10, 1997): 34–35. http://dx.doi.org/10.1021/cen-v075n045.p034.

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4

Ribeiro, Ana, Artur Valente, and Victor Lobo. "Diffusion Behaviour of Trivalent Metal Ions in Aqueous Solutions." Chemistry & Chemical Technology 5, no. 2 (June 15, 2011): 133–38. http://dx.doi.org/10.23939/chcht05.02.133.

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5

Rathore, Mukta, Ahmad Jahan Khanam, and Vikas Gupta. "Studies on Synthesis and Ion Exchange Properties of Sulfonated Polyvinyl Alcohol/Phosphomolybdic Acid Composite Cation Exchanger." Materials Science Forum 875 (October 2016): 149–55. http://dx.doi.org/10.4028/www.scientific.net/msf.875.149.

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In this study, sulfonated polyvinyl alcohol/phosphomolybdic acid composite cation exchange membrane was prepared by solution casting method. Some of the ionb exchange peroperties such as ion exchange capacity for alkali and alkali metal ions, effect of temperature on ion exchange capacity, elution behavior, effect of eluent concentration, distribution coefficient were studied. On the basis of selectivity coefficient values some important binary separation of heavy metal ion pairs such as Hg (II)-Zn (II), Hg (II)-Cd (II), Hg (II)-Ni (II) and Hg (II)-Cu (II) were carried out. It was observed that elution of heavy metal ions depends upon the metal-eluting ligand stability. Mercury remained in column for a longer time than that of other heavy metal ions. The separations are fairly sharp and recovery of Hg (II) ions is quantitative and reproducible.

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6

Manousi, Natalia, Dimitrios A. Giannakoudakis, Erwin Rosenberg, and George A. Zachariadis. "Extraction of Metal Ions with Metal–Organic Frameworks." Molecules 24, no. 24 (December 16, 2019): 4605. http://dx.doi.org/10.3390/molecules24244605.

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Metal–organic frameworks (MOFs) are crystalline porous materials composed of metal ions or clusters coordinated with organic linkers. Due to their extraordinary properties such as high porosity with homogeneous and tunable in size pores/cages, as well as high thermal and chemical stability, MOFs have gained attention in diverse analytical applications. MOFs have been coupled with a wide variety of extraction techniques including solid-phase extraction (SPE), dispersive solid-phase extraction (d-SPE), and magnetic solid-phase extraction (MSPE) for the extraction and preconcentration of metal ions from complex matrices. The low concentration levels of metal ions in real samples including food samples, environmental samples, and biological samples, as well as the increased number of potentially interfering ions, make the determination of trace levels of metal ions still challenging. A wide variety of MOF materials have been employed for the extraction of metals from sample matrices prior to their determination with spectrometric techniques.

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7

Permyakov, Eugene A. "Metal Binding Proteins." Encyclopedia 1, no. 1 (March 15, 2021): 261–92. http://dx.doi.org/10.3390/encyclopedia1010024.

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Metal ions play several major roles in proteins: structural, regulatory, and enzymatic. The binding of some metal ions increase stability of proteins or protein domains. Some metal ions can regulate various cell processes being first, second, or third messengers. Some metal ions, especially transition metal ions, take part in catalysis in many enzymes. From ten to twelve metals are vitally important for activity of living organisms: sodium, potassium, magnesium, calcium, manganese, iron, cobalt, zinc, nickel, vanadium, molybdenum, and tungsten. This short review is devoted to structural, physical, chemical, and physiological properties of proteins, which specifically bind these metal cations.

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8

Ilyasova, X. N. "THE STUDY OF ION-EXCHANGE EQUILIBRIUM OF HEAVY METAL IONS Cо2+ AND Cd2+ ON THE NATURAL AND SYNTHETIC SORBENTS." Azerbaijan Chemical Journal, no. 4 (December 8, 2022): 122–27. http://dx.doi.org/10.32737/0005-2531-2022-4-122-127.

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These article summaries the results of studying the sorption equilibrium of ions close to their concentration in the liquid industrial waste. For experimental research, solutions with concentration of Со2+ and Cd2+ ions in the range of 1·10-3–1·10-4 N have been used. These concentrations match to ion con¬cen¬tration in industrial liquid waste with the ions mentioned. In the experiments, the Na+- modified forms of natural sorbents based on clinoptilolite from the Aydag deposit and on bentonite from the Dash-Salakhli (Azerbaijan) deposit were used. For comparison, among industrial sorbents, we used synthetic cation exchanger KU–2–8 (styrene and divinylbenzene co–poly¬mer), which we modified in H+, Na+-form. The thermodynamic constant of ion-exchange equilibrium for differently charged ions, calculated by the Gorshkov-Tolmachev formula, does not depend on the solution concentration, and to calculate this value, it is not required to determine the activity coefficient. Based on experiments to determine equilibrium concentrations, we can recommend inexpensive and available Na-clinoptilolite and Na-bentonite instead of synthetic industrial KU-2-8 for the sorption extraction of Co2+ and Cd2+ ions from wastewater

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9

Griffin, David H., Guther Winkelmann, and Dennis R. Winge. "Metal Ions in Fungi." Mycologia 87, no. 3 (May 1995): 425. http://dx.doi.org/10.2307/3760843.

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10

Schweikhard, L., St Becker, K. Dasgupta, G. Dietrich, H.-J. Kluge, D. Kreisle, S. Krückeberg, et al. "Trapped metal cluster ions." Physica Scripta T59 (January 1, 1995): 236–43. http://dx.doi.org/10.1088/0031-8949/1995/t59/032.

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11

Ragan, C. Ian. "Metal Ions in Neuroscience." Metal-Based Drugs 4, no. 3 (January 1, 1997): 125–32. http://dx.doi.org/10.1155/mbd.1997.125.

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Metal ions are believed to participate in many neurodegenerative conditions. In excitotoxic cell death there is convincing evidence for the participation of Ca2+ and Zn2+ ions although the exact molecular mechanisms by which these metals exert their effects are unclear. Only in one instance has the metal binding site of metalloenzymes been exploited for therapeutic purposes and this is the use of Li+ in the treatment of bipolar affective disorder. Again the exact molecular target is not clear but is likely to involve a Mg2+-dependent enzyme of an intracellular signalling pathway. In Parkinson's disease, the selective loss of dopaminergic neurones in the substantia nigra may be caused by radical-mediated damage and there is good evidence to suggest that Fe2+ or 3+ is important in promoting formation of radical species. The evidence that free radicals are important in mediating other neurodegenerative conditions is less strong but still substantial enough to suggest that removal of reactive oxygen species or preventing their formation may be a valid approach to therapy.

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12

Crabtree, R. H. "Metal Ions at Work." Science 266, no. 5190 (December 2, 1994): 1591–92. http://dx.doi.org/10.1126/science.266.5190.1591.

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13

Navasivayam, C. "Biosorbents for metal ions." Bioresource Technology 64, no. 2 (May 1998): 161. http://dx.doi.org/10.1016/s0960-8524(98)00014-5.

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14

Blake, Diane A., Robert C. Blake II, Mehraban Khosraviani, and Andrey R. Pavlov. "Immunoassays for metal ions." Analytica Chimica Acta 376, no. 1 (December 1998): 13–19. http://dx.doi.org/10.1016/s0003-2670(98)00437-1.

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15

THORNELEY, R. "Metal ions and bacteria." Trends in Biotechnology 8 (1990): 298–99. http://dx.doi.org/10.1016/0167-7799(90)90204-b.

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16

McRee, Duncan E. "Living with metal ions." Nature Structural Biology 5, no. 1 (January 1998): 8–10. http://dx.doi.org/10.1038/nsb0198-8.

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17

Newkome, George R., Ian Manners, Stephanie Schubert, and Ulrich S. Schubert. "Macromolecules Containing Metal Ions." Macromolecular Rapid Communications 33, no. 6-7 (April 5, 2012): 447. http://dx.doi.org/10.1002/marc.201200088.

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18

Miteva, T., J. Wenzel, S. Klaiman, A. Dreuw, and K. Gokhberg. "X-Ray absorption spectra of microsolvated metal cations." Physical Chemistry Chemical Physics 18, no. 25 (2016): 16671–81. http://dx.doi.org/10.1039/c6cp02606k.

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19

Abednatanzi, Sara, Parviz Gohari Derakhshandeh, Hannes Depauw, François-Xavier Coudert, Henk Vrielinck, Pascal Van Der Voort, and Karen Leus. "Mixed-metal metal–organic frameworks." Chemical Society Reviews 48, no. 9 (2019): 2535–65. http://dx.doi.org/10.1039/c8cs00337h.

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20

Wang, Ru, Zhen Zhang, and Hui Yun Liu. "Adsorption Disciplinarian of Metal Ions on Collagen Fiber Immobilized Bayberry Tannin." Advanced Materials Research 391-392 (December 2011): 1031–35. http://dx.doi.org/10.4028/www.scientific.net/amr.391-392.1031.

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Adsorption behavior disciplinarian of the immobilized tannins to metal ions was studied. Experiments showed that adsorption capacities of metal ions lied in ns grouse in the periodic table of elements were relatively low. For the metal ions lied in np grouse in the periodic table of elements, their adsorption capacity increased with the increasing in the radius of metal ions. Adsorption capacities of metal ions having low values in the first transition series in the periodic table of elements, such as Mn(II), Fe(II), Fe(III), Co(II) and Ni(II), were more lower than that of the metal ions having high values, such as Cr(VI), Mn(VII) and V(V). For the metal ions in the second, the third transition series and the actinide series, adsorption capacities were relatively higher than that of metal ions in lanthanide series.

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21

Sadakiyo, Masaaki, and Hiroshi Kitagawa. "Ion-conductive metal–organic frameworks." Dalton Transactions 50, no. 16 (2021): 5385–97. http://dx.doi.org/10.1039/d0dt04384b.

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22

An, Qi, Mei-Ling Han, Lu-Sen Bian, Zhi-Chao Han, Ning Han, Yun-Feng Xiao, and Fang-Bo Zhang. "Enhanced laccase activity of white rot fungi induced by different metal ions under submerged fermentation." BioResources 15, no. 4 (September 18, 2020): 8369–83. http://dx.doi.org/10.15376/biores.15.4.8369-8383.

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Submerged fermentation with single or mixed metal ions as inducers was used for laccase production from white rot fungi. Mixed metal ions were used for the first time as inducers for Pleurotus ostreatus and Flammulina velutipes to enhance laccase activity. The maximum laccase activity from P. ostreatus in basal media, metal ion media 1 containing copper ion, metal ion media 2 containing manganese ion, metal ion media 3 containing manganese and copper ions, metal ion media 4 containing ferrous ion, metal ion media 5 containing manganese and ferrous ions, metal ion media 6 containing ferrous and copper ions, and metal ion media 7 containing manganese, copper and ferrous ions were, respectively, approximately 21.5-fold, 4.7-fold, 14.9-fold, 16.9-fold, 4.0-fold, 11.0-fold, 12.7-fold, and 24.8-fold higher than that from F. velutipes. The combination of copper and manganese ions as inducers was superior to that of a single copper ion or manganese ion. The maximum laccase activity of P. ostreatus rose in media containing manganese and copper ions. The single copper ion as the inducer for enhancing laccase activity was more suitable for F. velutipes. These findings are helpful in selecting the appropriate single metal ion or mixed metal ions to enhance laccase activity.

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23

Spinello, Angelo, Riccardo Bonsignore, Giampaolo Barone, Bernhard K. Keppler, and Alessio Terenzi. "Metal Ions and Metal Complexes in Alzheimer's Disease." Current Pharmaceutical Design 22, no. 26 (August 1, 2016): 3996–4010. http://dx.doi.org/10.2174/1381612822666160520115248.

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24

Mukhtar, Aiman. "Metal Nanowires Subjected to Relavant Hydrated Metal Ions." International Journal of Materials Science and Applications 6, no. 2 (2017): 88. http://dx.doi.org/10.11648/j.ijmsa.20170602.14.

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25

Zatta, Paolo, Denise Drago, Silvia Bolognin, and Stefano L. Sensi. "Alzheimer's disease, metal ions and metal homeostatic therapy." Trends in Pharmacological Sciences 30, no. 7 (July 2009): 346–55. http://dx.doi.org/10.1016/j.tips.2009.05.002.

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26

Al-Asheh, Sameer, Fawzi Banat, and Dheaya‘ Al-Rousan. "Adsorption of Copper, Zinc and Nickel Ions from Single and Binary Metal Ion Mixtures on to Chicken Feathers." Adsorption Science & Technology 20, no. 9 (November 2002): 849–64. http://dx.doi.org/10.1260/02636170260555778.

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Certain industries often produce mixtures of heavy metal ions in their waste products. Because of the nature of heavy metal ions and the adsorption process, such metal ions can compete with each other for the sorption sites on an adsorbent during adsorption processes. In the present work, binary systems composed of copper, zinc and nickel ions were selected as examples of heavy metal ion mixtures and tested via batch adsorption processes using chicken feathers as an adsorbent. The uptake of individual metal ions was depressed by the presence of another. Thus, the uptake of copper ions from an initial copper ion solution of 20 ppm concentration was reduced from 0.042 mmol/g to ca. 0.019 mmol/g by the presence of a similar concentration of nickel ions. The Freundlich, Langmuir and Sips multi-component adsorption models were employed to predict the uptake of metal ions from binary metal ion solutions using constants obtained from adsorption isotherm models applied to single-solute systems.

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27

Haque, Farhana, Afroza Khatun, PK Bakshi, and AA Shaikh. "Voltammetric study of the interactions of alkaline earth metal ions and melamine at different ph." Bangladesh Journal of Scientific Research 27, no. 1 (January 4, 2016): 39–50. http://dx.doi.org/10.3329/bjsr.v27i1.26223.

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The electrochemical redox behavior of alkaline earth metal ions at different pH in acetate buffer solution has been investigated using cyclic voltammetric method at gold disk electrode (GDE). In the entire studied pH (3.68-6.23), metal ions show two cathodic and an anodic peak. The method has also been employed to observe the interaction of metal ions with melamine in acetate buffer solution. At all pH, a reasonably strong interaction occurs between metal ions and melamine at different metal ions/melamine molar ratio. However, maximum interaction takes place at 1:4 molar ratios of metal ions and melamine at pH 6.23. This is possibly the most suitable condition for alkaline earth metal-melamine interaction.Bangladesh J. Sci. Res. 27(1): 39-50, June-2014

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28

Jirekar Pramila Ghumare, Dattatraya. "Removal of Metal Ions via Adsorption Technique using Low-Cost Adsorbent." International Journal of Science and Research (IJSR) 13, no. 1 (January 5, 2024): 707–12. http://dx.doi.org/10.21275/sr24106102204.

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29

Amirnia, Shahram, Argyrios Margaritis, and Madhumita B. Ray. "Adsorption of Mixtures of Toxic Metal Ions Using Non-Viable Cells of Saccharomyces Cerevisiae." Adsorption Science & Technology 30, no. 1 (January 2012): 43–63. http://dx.doi.org/10.1260/0263-6174.30.1.43.

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The use of waste biomaterial for the adsorption of heavy metal ions is an economically appealing alternative to conventional metal ion removal methods. In the present work, S. cerevisiae biomass has been shown to be capable of the simultaneous removal of more than 98% of Pb(II) ions, 60% of Zn(II) ions and up to 55% of Cu(II) ions from aqueous solutions in the 10–50 mg/ℓ concentration range. Model equations describing the removal efficiency of each metal ion were determined using Response Surface Methodology (RSM) with respect to operating conditions such as pH, initial metal ion concentration and biomass dosage. Characterization of the metal ion–biomass interactions responsible for biosorption was studied employing zeta potential measurements, BET, FT-IR and EDX techniques; these indicated that the uptake of metal ions by non-living yeast was a surface adsorption phenomenon. The results proved the involvement of an ion-exchange mechanism between the adsorbing metal ions and the cell walls. In the presence of the complete range of metal ions studied, yeast cells were more selective towards Pb(II) ions.

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30

Ganetsos, Th, G. L. R. Mair, C. J. Aidinis, and L. Bischoff. "Characteristics of erbium-ions-producing liquid metal ions sources." Physica B: Condensed Matter 340-342 (December 2003): 1166–70. http://dx.doi.org/10.1016/j.physb.2003.09.093.

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31

Mittapally, Sirisha, Ruheena Taranum, and Sumaiya Parveen. "Metal ions as antibacterial agents." Journal of Drug Delivery and Therapeutics 8, no. 6-s (December 15, 2018): 411–19. http://dx.doi.org/10.22270/jddt.v8i6-s.2063.

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Metals like mercury, arsenic, copper and silver have been used in various forms as antimicrobials for thousands of years. The use of metals in treatment was mentioned in Ebers Papyrus (1500BC); i.e, copper to decrease inflammation & iron to overcome anemia. Copper has been registered at the U.S. Environmental Protection Agency as the earliest solid antimicrobial material. Copper is used for the treatment of different E. coli, MRSA, Pseudomonas infections. Advantage of use of silver is it has low toxicity to human’s cells than bacteria.It is less susceptible to gram +ve bacteria than gram –bacteria due to its thicker cell wall. Zinc is found to be active against Streptococcus pneumonia, Campylobacter jejuni. Silver & zinc act against vibrio cholera & enterotoxic E. coli. The use of metals as antibacterial got reduce with discovery of antibiotics in twentieth century, immediately after that antibiotic resistance was seen due to transfer of antibiotic resistance genes by plasmids also known as Resistance Transfer Factors or R-factors. Metal complexes are used to show synergistic activity against bacteria’s like copper & chlorhexidine on dental plaque bacteria, silver nanoparticles & cephalexin against E. coli & S. aureus. Keywords: Metals, Oligodynamic effect, Copper, Silver

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32

DING, Jia-Wang. "Electrochemical sensors for metal ions." Chinese Journal of Analytical Chemistry 50, no. 6 (June 2022): 100090. http://dx.doi.org/10.1016/j.cjac.2022.100090.

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33

FUJII, KAN'ICHI. "He-Cd ( metal ions ) laser." Review of Laser Engineering 21, no. 1 (1993): 32–35. http://dx.doi.org/10.2184/lsj.21.32.

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34

Lansdown, A. "Percutaneous absorption of metal ions." Veterinary Record 137, no. 10 (September 2, 1995): 252. http://dx.doi.org/10.1136/vr.137.10.252-a.

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35

Medyantseva, El'vina P., Margarita G. Vertlib, and German K. Budnikov. "Metal ions as enzyme effectors." Russian Chemical Reviews 67, no. 3 (March 31, 1998): 225–32. http://dx.doi.org/10.1070/rc1998v067n03abeh000228.

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36

Jellinger, K. A. "Metal Ions and Neurodegenerative Disorders." European Journal of Neurology 11, no. 9 (September 2004): 647–48. http://dx.doi.org/10.1111/j.1468-1331.2004.00829.x.

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37

Zhao, Wei-Wei, Jing-Juan Xu, and Hong-Yuan Chen. "Photoelectrochemical detection of metal ions." Analyst 141, no. 14 (2016): 4262–71. http://dx.doi.org/10.1039/c6an01123c.

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38

Lehmann, Sylvain. "Metal ions and prion diseases." Current Opinion in Chemical Biology 6, no. 2 (April 2002): 187–92. http://dx.doi.org/10.1016/s1367-5931(02)00295-8.

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39

Winkler, Jeffrey D., Kurt Deshayes, and Bin Shao. "Photodynamic transport of metal ions." Journal of the American Chemical Society 111, no. 2 (January 1989): 769–70. http://dx.doi.org/10.1021/ja00184a076.

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40

Chie, K., M. Fujiwara, Y. Fujiwara, and Y. Tanimoto. "Magnetic Separation of Metal Ions." Journal of Physical Chemistry B 107, no. 51 (December 2003): 14374–77. http://dx.doi.org/10.1021/jp030688c.

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41

Blanco, M., J. Coello, F. González, H. Iturriaga, and S. Maspoch. "Simultaneous determination of metal ions." Analytica Chimica Acta 222, no. 2 (1989): 271–79. http://dx.doi.org/10.1016/s0003-2670(00)83284-5.

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42

Blanco, M., J. Coello, F. González, H. Iturriaga, and S. Maspoch. "Simultaneous determination of metal ions." Analytica Chimica Acta 226, no. 2 (November 1989): 271–79. http://dx.doi.org/10.1016/s0003-2670(89)80009-1.

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43

Quintanar, Liliana, and Mi Hee Lim. "Metal ions and degenerative diseases." JBIC Journal of Biological Inorganic Chemistry 24, no. 8 (November 23, 2019): 1137–39. http://dx.doi.org/10.1007/s00775-019-01744-4.

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44

Renshaw, Perry F. "Lithium, metal ions, and choline." Biological Psychiatry 22, no. 5 (May 1987): 660–61. http://dx.doi.org/10.1016/0006-3223(87)90195-8.

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45

Koryta, J. "Metal Ions in Biological Systems." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 185, no. 2 (April 1985): 397. http://dx.doi.org/10.1016/0368-1874(85)80146-5.

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46

Faller, Peter, and Christelle Hureau. "Metal ions in neurodegenerative diseases." Coordination Chemistry Reviews 256, no. 19-20 (October 2012): 2127–28. http://dx.doi.org/10.1016/j.ccr.2012.04.006.

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47

Sliwa, Wanda, and Tomasz Girek. "Calixarene complexes with metal ions." Journal of Inclusion Phenomena and Macrocyclic Chemistry 66, no. 1-2 (September 22, 2009): 15–41. http://dx.doi.org/10.1007/s10847-009-9678-7.

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48

Williams, R. J. P. "Metal Ions in Biological Catalysts." Bulletin des Sociétés Chimiques Belges 91, no. 5 (September 1, 2010): 354. http://dx.doi.org/10.1002/bscb.19820910513.

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49

Gao, Yan, Li Han, Xing Gao, Wen He, Ranran Chu, and Yefei Ma. "Application of Carbon Quantum dot Fluorescent Materials in Metal Ions Detection." E3S Web of Conferences 245 (2021): 03080. http://dx.doi.org/10.1051/e3sconf/202124503080.

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The research situation of the application of carbon quantum dot fluorescent materials to the detection of metal ions, including the current research status and preface of recent years, and development trends are summarized. The application of carbon quantum dot fluorescent materials to the detection of metal ions is highlighted, including iron ions, copper ions, mercury ions, lead ions, and silver ions. Finally, the problems and development prospects of carbon quantum dot fluorescent materials for detecting metal ions are discussed.

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50

Rudnik, Ewa, and Joanna Knapczyk-Korczak. "Preliminary investigations on hydrometallurgical treatment of spent Li-ion batteries." Metallurgical Research & Technology 116, no. 6 (2019): 603. http://dx.doi.org/10.1051/metal/2019008.

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The paper reports investigations of the direct recovery of copper and cobalt from sulphate solution after leaching of spent Li-ion cells. Metals of high purity (above 99%) can be selectively obtained if the electrolysis process is carried out at proper pH: 1 for Cu and 4 for Co. During cobalt electrowinning, the oxidation of Co(II) ions and formation of Co(III) compounds on the anode were observed. Lithium ions accumulated mainly in the electrolyte. Application of ammoniacal solution for selective lithium carbonate precipitation in the presence of cobalt ions was not effective due to high temperature of the process and no possible formation of the stable and soluble cobalt-ammonia complexes.

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