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Artigos de revistas sobre o tema "Ions"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 9 de junho de 2025

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1

N., K. Mishra. "Antimony(V) tungstate as a new inorganic ion exchanger useful for removal of chromium(VI), mercury(II) and lead(II)." Journal of Indian Chemical Society Vol. 80, July 2003 (July 31, 2003): 714–16. https://doi.org/10.5281/zenodo.5835580.

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Department of Chemistry, Bappa Sri Narain Vocational Post-Graduate College, Lucknow-226 001, India <em>Manuscript received 20 March 2002, revised 1 November 2002, accepted 31 January 2003</em> A new inorganic ion exchanger antimony(v) tungstate (AT) has been synthesized under varying conditions. Distribution coefficients (K<sub>d</sub>) of 16 transition metal ions have been studied in DMW, 0.1 M HCl, 0.1 <em>M</em> HCI + 10% DMSO (1 : 10) and 1<em>M</em> NH<sub>4</sub>Cl systems, and some analytically important separations of metal ions have been investigated. The greater selectivity behavior of the exchanger for Cr<sup>VI</sup>, Hg<sup>II</sup> and Pb<sup>II</sup> has been utilized for the removal and recovery of these metal ions from dilute water samples.

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2

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, № 4 (8 грудня 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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3

L., ILCHEVA, YANAKIEV R., and CAMMANN K. "Flow Injection Potentiometry of Bromide Ions in Sea Water." Journal of Indian Chemical Society Vol. 68, Mar 1991 (March 31, 1991): 154–57. https://doi.org/10.5281/zenodo.5990505.

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Technological University of Sofia, Department of Analytical Chemistry, 8 Kliment Ohridski Str., 1756 Sofia, Bulgaria Anorganisch Chemisches Institut, Der Westfilischen Wilhelms universitat, Wilhelm Klemmstr 8, D-4400, Münster, BRD <em>Manuscript received 18 June 1990, revised 4 February 1991, accepted 20 March 1991</em> The advantages of the bromide ion selective electrode in flow injection systems are pretty visible when analysing bromide in sea water at the average ratio of 1000. Br<sup>-</sup>/C1<sup>-</sup>=3.95 on 32 —52 mg dm<sup>-1</sup> bromide level Direct flow injection potentio. metry was applied without pretreating the sample. The matrix effect of high chloride concentration was simply removed while calibrating the electrode by means of sodium chloride. The results obtained agree well with those recommended in literature with coefficient of variation < 1% and the simplified system compares favourably with spectrophotometric methods

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4

Chawla, Gunjan, and Gordon Drummond. "Water, strong ions, and weak ions." Continuing Education in Anaesthesia Critical Care & Pain 8, no. 3 (June 2008): 108–12. http://dx.doi.org/10.1093/bjaceaccp/mkn017.

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5

UchkunOtoboevich, Kutliev, Tangriberganov Ismoil Urazboyevich, and Karimov Muxtor Karimberganovich. "Investigation of Effect Ion Refocusing From the GaP001110 Surface at the Grazing Incidence Ne Ions." International Journal of Trend in Scientific Research and Development Volume-1, Issue-5 (August 31, 2017): 937–40. http://dx.doi.org/10.31142/ijtsrd2397.

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6

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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7

Jayantilal, Joshi. "An overview on the sorption of 3d and 4f metal ions on phenolic resins." Journal of Indian Chemical Society Vol. 87, May 2010 (May 31, 2010): 529–38. https://doi.org/10.5281/zenodo.5785807.

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Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar-388 120, Gujarat, India <em>E-mail</em> : jdjoshi314@gmail.com <em>Manuscript received 1 April 2009, revised 8 October 2009, accepted 28 October 2009</em> Synthesis of benzophenone based phenolic resins and study of its ion exchange efficiency using different electrolytes, pH, time and concentrations.

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8

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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9

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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10

Prakash, G. K. Surya, Mark R. Bruce, and George A. Olah. "Onium ions. 30. Methyl- and ethylvinylhalonium ions." Journal of Organic Chemistry 50, no. 13 (June 1985): 2405–6. http://dx.doi.org/10.1021/jo00213a050.

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11

Mann, K., and K. Rohr. "Differential measurement of the absolute ion yield from laser-produced C plasmas." Laser and Particle Beams 10, no. 3 (September 1992): 435–46. http://dx.doi.org/10.1017/s0263034600006686.

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The ion flux produced by an obliquely incident Nd Q-switch pulse on a graphite target has been analyzed with regard to its kinetic energy, charge, and angular distribution. The laser intensity has been varied in a range between 109–5·1010 W/cm2, appropriate for many low-irradiance applications. It is observed that for ions of charge state n the emission cone of the number of ions scales with cos2n+1. The angular emission probability of the kinetic energy of the individual ions is found to be independent of their charge and scales as a cosine function. Due to the asymmetrical heating of the expanding plasma by the obliquely incident laser pulse, the maximum of emission is rotated away from the target normal toward the incoming laser, depending upon the ion's charge and the laser energy. The measured kinetic energy spectra are determined by the recombination during the plasma expansion: There are no low-energetic highly charged ions and no high-energetic lowly chargedions. If the laser energy (intensity) is enhanced, it is observed that the additional heating essentially serves only to increase the velocity of the higher charged ions; the energy of the individual singly charged ions is not altered.

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12

D., D. Mishra. "Effect of associated cation on the exchange of Cl-/NO3- in acetone-water media, using strongly basic anion exchanger Amberlite IRA-400 in nitrate form." Journal of Indian Chemical Society Vol. 83, Mar 2006 (March 31, 2006): 266–68. https://doi.org/10.5281/zenodo.5835482.

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Department of Chemistry, Govt. Gitanjali Girls College, Bhopal-462 038, Madhya Pradesh, India <em>Manuscript received 5 May 2004, revised 18 July 2005, accepted 24 November 2005</em> The effect of associated cation on the exchange of uninlent ions in acetone-water media; CI<sup>-</sup>/NO<sub><sup>\(_3^-\)</sup></sub> system was studied with one g or resin using Amberlite IRA-400 (20-40 mesh) in nitrate form. The chloride exchange increased in all the cases with Increase in acetone percentage of the solutions. But, the extent of exchange in different cases was different when different salts were used.

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13

Zhu, Yuhua, Jianying Wang, Xiang Zhu, Jun Wang, Lijie Zhou, Jinhua Li, Tao Mei, Jingwen Qian, Lai Wei, and Xianbao Wang. "Carbon dot-based inverse opal hydrogels with photoluminescence: dual-mode sensing of solvents and metal ions." Analyst 144, no. 19 (2019): 5802–9. http://dx.doi.org/10.1039/c9an01287g.

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14

Crary, F. J., and F. Bagenal. "Ion cyclotron waves, pickup ions, and Io's neutral exosphere." Journal of Geophysical Research: Space Physics 105, A11 (November 1, 2000): 25379–89. http://dx.doi.org/10.1029/2000ja000055.

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15

Chang, Christopher J. "Ions illuminated." Nature 448, no. 7154 (August 8, 2007): 654–55. http://dx.doi.org/10.1038/448654a.

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16

Clarke, Ronald J., and Xiaochen Fan. "Pumping ions." Clinical and Experimental Pharmacology and Physiology 38, no. 11 (October 20, 2011): 726–33. http://dx.doi.org/10.1111/j.1440-1681.2011.05590.x.

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17

Stajic, J. "Periodic Ions." Science 342, no. 6158 (October 31, 2013): 537. http://dx.doi.org/10.1126/science.342.6158.537-b.

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18

Kochina, Tat'yana A., Dmitry V. Vrazhnov, Evgeniya N. Sinotova, and Mikhail G. Voronkov. "Silylium ions." Russian Chemical Reviews 75, no. 2 (February 28, 2006): 95–110. http://dx.doi.org/10.1070/rc2006v075n02abeh002480.

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19

Carafoli, E. "Pumping Ions." Science 262, no. 5138 (November 26, 1993): 1461. http://dx.doi.org/10.1126/science.262.5138.1461-a.

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20

Cocke, C. L., and R. E. Olson. "Recoil ions." Physics Reports 205, no. 4 (June 1991): 153–219. http://dx.doi.org/10.1016/0370-1573(91)90072-t.

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21

Kühlbrandt, Werner. "Pumping ions." Nature Structural Biology 4, no. 10 (October 1997): 773. http://dx.doi.org/10.1038/nsb1097-773.

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22

Nieminen, Timo A. "Trapping ions." Nature Photonics 4, no. 11 (November 2010): 737–38. http://dx.doi.org/10.1038/nphoton.2010.248.

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23

HILLE, B. "Pumping Ions." Science 255, no. 5045 (February 7, 1992): 742. http://dx.doi.org/10.1126/science.255.5045.742.

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24

Werth, G. "Trapped ions." Contemporary Physics 26, no. 3 (May 1985): 241–56. http://dx.doi.org/10.1080/00107518508223684.

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25

MacLennan, David H., and N. Michael Green. "Pumping ions." Nature 405, no. 6787 (June 2000): 633–34. http://dx.doi.org/10.1038/35015206.

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26

Müller, Hans. "Cluster Ions." Zeitschrift für Physikalische Chemie 184, Part_1_2 (January 1994): 292–93. http://dx.doi.org/10.1524/zpch.1994.184.part_1_2.292a.

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27

Greenwell, Gregory. "Freezing Ions." Scientific American 258, no. 3 (March 1988): 28. http://dx.doi.org/10.1038/scientificamerican0388-28.

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28

Tomazela, Daniela Maria, Adão A. Sabino, Regina Sparrapan, Fabio C. Gozzo, and Marcos N. Eberlin. "Distonoid ions." Journal of the American Society for Mass Spectrometry 17, no. 7 (July 2006): 1014–22. http://dx.doi.org/10.1016/j.jasms.2006.03.008.

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29

Martin, S., A. Salmoun, R. Brédy, G. Montagne, J. Bernard, X. Ma, and L. Chen. "Negative ions produced in multicharged ions and C60collisions." Physica Scripta T144 (June 1, 2011): 014022. http://dx.doi.org/10.1088/0031-8949/2011/t144/014022.

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30

Head, Nicholas J., Golam Rasul, Anjana Mitra, A. Bashir-Heshemi, G. K. Surya Prakash, and George A. Olah. "Onium Ions. 44. Cubyl Onium Ions: Cubylcarboxonium, Cubylacylium, and Dimethyl Cubyl-1,4-dihalonium Ions." Journal of the American Chemical Society 117, no. 49 (December 1995): 12107–13. http://dx.doi.org/10.1021/ja00154a011.

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31

S., D. Sharma, Gupta M., and Gupta R. "Complexation ion exchange electrochromatography of metal ions on papers impregnated with titanium(IV) tungstate." Journal of Indian Chemical Society Vol. 77, Jun 2000 (June 30, 2000): 307–10. https://doi.org/10.5281/zenodo.5870285.

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Analytical Research Laboratory, Department of Chemistry, Hindu College, B-3 Jigar Colony, Moradabad-244 001, India <em>Manuscript received 11 December 1999. accepted 26 February 2000</em> The electrochromatographic behaviour of 37 metal ions has been studied on titanium(IV) tungstate papers using oxalic, citric, tartaric, hydrochloric and nitric acids as background electrolytes. The ion exchange capacity of these papers is determined and their selectivity for different metal ions discussed. The mechanism of migration is explained. Prediction of elution sequence of metal ions on the basis of their migration is also checked. A number of useful binary and ternary separations are achieved.

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32

K., G. VARSHNEY, A. KHAN A., and S. SIDDIQUI M. "Inorganic Ion-exchangers as New Adsorbents in Peak Paper Chromatographic Studies of Metal Ions : Selective Determination of Nickel(ll) and Cobalt(II) on Papers Impregnated with Chromium(III) and Tin(IV) Arsenosilicates." Journal of Indian Chemical Society Vol. 69, Sep 1992 (September 30, 1992): 604–5. https://doi.org/10.5281/zenodo.6088025.

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Department of Applied Chemistry, Z. H. College of Engineering and Technology, Aligarh Muslim University, Aligarh-202 002 <em>Manuscript received 23 May 1991, revised 18 June 1992, accepted 3 July 1992</em> Inorganic Ion-exchangers as New Adsorbents in Peak Paper Chromatographic Studies of Metal Ions : Selective Determination of Nickel(ll) and Cobalt(II) on Papers Impregnated with Chromium(III) and Tin(IV) Arsenosilicates.

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33

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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34

Yamamura, Yasunori, Yoshiyuki Mizuno, and Hidetoshi Kimura. "Angular distributions of sputtered atoms for low-energy heavy ions, medium ions and light ions." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 13, no. 1-3 (March 1986): 393–95. http://dx.doi.org/10.1016/0168-583x(86)90535-5.

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35

Driess, Matthias, Christian Monsé, Klaus Merz, and Christoph van Wüllen. "Perstannylated Ammonium and Phosphonium Ions: Organometallic Onium Ions That Are also Base-Stabilized Stannylium Ions." Angewandte Chemie 39, no. 20 (October 16, 2000): 3684–86. http://dx.doi.org/10.1002/1521-3773(20001016)39:20<3684::aid-anie3684>3.0.co;2-u.

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36

qizi, Davronova Norniso Faxriddin, and Smanova Zulayho Asanaliyevna. "THE DEVELOPMENT OF NEW METHODS FOR DETECTING IRON IONS IN WATER AND CONDUCTING QUANTITATIVE ANALYSIS OF THESE IONS." American Journal of Applied Science and Technology 4, no. 12 (December 1, 2024): 57–64. https://doi.org/10.37547/ajast/volume04issue12-10.

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The dynamics of seasonal and annual changes in the concentration of iron (III) ions in the waters of the Kungirot district of the Republic of Karakalpakstan were analyzed. A method for determining iron (III) ions using immobilized organic reagents containing nitrogen and oxygen was proposed. The sorption-spectrophotometric method was compared with other methods, and the t and F criteria were determined. Favorable conditions for the immobilization of organic reagents were identified. Scanning electron microscope images of the immobilized organic reagent, sorbent, and the formed iron (III) ion complex were captured.

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37

Blanco-Ania, Daniel, and Floris P. J. T. Rutjes. "Carbonylonium ions: the onium ions of the carbonyl group." Beilstein Journal of Organic Chemistry 14 (October 4, 2018): 2568–71. http://dx.doi.org/10.3762/bjoc.14.233.

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The nomenclature of cations R1C(=O+R3)R2 (R1, R2, R3 = H or organyl) has been examined and shown to be in a state of immeasurable confusion: a pragmatic recommendation is made that the generic term “carbonylonium ions” should be adopted for these intermediates, which comprises the terms “aldehydium” (R1 = H, R2, R3 = H or organyl) and “ketonium ions” (R1, R2 = organyl, R3 = H or organyl) for the corresponding aldehyde- and ketone-based intermediates, respectively.

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38

Mair, C., T. Fiegele, F. Biasioli, R. Wörgötter, V. Grill, M. Lezius, and T. D. Märk. "Surface-induced reactions of polyatomic ions and cluster ions." Plasma Sources Science and Technology 8, no. 2 (January 1, 1999): 191–202. http://dx.doi.org/10.1088/0963-0252/8/2/001.

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39

Kuznetsov, V. V., M. R. Pavlov, D. I. Zimakov, S. A. Chepeleva, and V. N. Kudryavtsev. "Electroreduction of Molybdate Ions in Solutions Containing Ammonium Ions." Russian Journal of Electrochemistry 40, no. 7 (July 2004): 711–15. http://dx.doi.org/10.1023/b:ruel.0000035253.18329.98.

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40

Keesee, R. G., and A. W. Castleman. "Ions and cluster ions: Experimental studies and atmospheric observations." Journal of Geophysical Research 90, no. D4 (1985): 5885. http://dx.doi.org/10.1029/jd090id04p05885.

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41

Bahati, E. M., R. D. Thomas, C. R. Vane, and M. E. Bannister. "Electron-impact dissociation of D13CO+molecular ions to13CO+ions." Journal of Physics B: Atomic, Molecular and Optical Physics 38, no. 11 (May 20, 2005): 1645–55. http://dx.doi.org/10.1088/0953-4075/38/11/006.

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42

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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43

Joshi, B. C., and M. C. Joshi. "Sensitizing Pr3+ ions by Tm3+ ions in phosphate glass." Journal of Non-Crystalline Solids 142 (January 1992): 171–74. http://dx.doi.org/10.1016/s0022-3093(05)80021-3.

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44

Hanway, Patrick J., and Arthur H. Winter. "Phenyloxenium Ions: More Like Phenylnitrenium Ions than Isoelectronic Phenylnitrenes?" Journal of the American Chemical Society 133, no. 13 (April 6, 2011): 5086–93. http://dx.doi.org/10.1021/ja1114612.

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45

Harrison, Alex G., Alex B. Young, Martina Schnoelzer, and Béla Paizs. "Formation of iminium ions by fragmentation of a2 ions." Rapid Communications in Mass Spectrometry 18, no. 14 (July 23, 2004): 1635–40. http://dx.doi.org/10.1002/rcm.1532.

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46

Lork, Enno, Dieter Böhler, and Rüdiger Mews. "Fluorophosphazenate Ions: A Route to Complexation of Fluoride Ions." Angewandte Chemie International Edition in English 34, no. 2324 (January 5, 1996): 2696–98. http://dx.doi.org/10.1002/anie.199526961.

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47

Maier, John P. "Spectroscopic Characterization of Carbon Chains, Ions, and Cluster Ions." CHIMIA 53, no. 5 (May 26, 1999): 212. https://doi.org/10.2533/chimia.1999.212.

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The current directions and experimental techniques used for the measurement of the electronic spectra of astrophysically relevant carbon chains, as well as infrared spectra of ionic complexes are outlined.

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48

Petkova, Petya. "TETRAHEDRAL COMPLEX OF Cr3+ AND Cr4+ IONS IN Bi12SiO20." Journal scientific and applied research 2, no. 1 (October 10, 2012): 58–65. http://dx.doi.org/10.46687/jsar.v2i1.44.

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Absorption measurement is taken in the visible spectral region (650 – 1300 nm). The dopants Cr3+ and Cr4+ ions occupy the tetrahedral sites in the crystal lattice of doped sillenite. The energy level structure of these ions in Bi12SiO20:Cr (BSO:Cr) are presented. The Dq-, B- and C-parameters of the crystal field theory for the Cr3+ and Cr4+ ions were obtained. The spin-coupling energy is also calculated for the chromium ions.

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A., V. Singh, and Kumar Sharma Naresh. "Role of chemically modified guar gum 4-aminobenzoic acid [GABA] resin for removal of toxic metal ions from industrial wastewater." Journal of Indian Chemical Society Vol. 89, Jul 2012 (July 30, 2012): 903–11. https://doi.org/10.5281/zenodo.5766720.

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Department of Chemistry, Jai Narain Vyas University, Jodhpur-342 033, Rajasthan, India E-mail : areshvikram04@rediffmail.com, nareshksharma89@rediffmail.com Fax : 91-0291-2720436 Manuscript received 12 July 2011, revised 08 November 2011, accepted 11 November 2011 A new guar gum based guar gum 4-aminobenzoic acid [GABA] resin has been synthesized and their adsorption behavior for toxic metal ions has been investigated by batch and column experiments. An application was under taken regarding the adsorption of different toxic metal ions from effluent of Puneet Steel Industry, Jodhpur using GABA resin. The distribution coefficient value of metal ions at different pH was also studied using batch equilibration method. The different factors affecting metal ion adsorption on this substrate such as pH, treatment time, agitation speed, flow rate and temperature were studied in detail. The prepared GABA resin was characterized by FTIR, ion exchange capacity (IEC), elemental and thermogravimetric analysis. The durability and swelling studies of GABA resin were also studied. The adsorption of different metal ions on GABA resin follows the order : Cu<sup>2+</sup> > Cd<sup>2+</sup> > Fe<sup>2+</sup> > Pb<sup>2+</sup> > Zn<sup>2+</sup>.

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Himanshu, Agarwal, and Chandra Sulekh. "PVC-based heterogeneous chelating inorganic exchanger membrane as sensors for the determination of zinc( II) ions." Journal of Indian Chemical Society Vol. 83, Apr 2006 (April 30, 2006): 369–72. https://doi.org/10.5281/zenodo.5836174.

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Department of Chemistry, Zakir Husain College (University of Delhi), J. L. Nehru Marg, New Delhi-110 002, India E-mail: schandra_oo@yahoo.com <em>Manuscript received 21 July 2004, revised 2fi October 2005. accepted 16 December 2005</em> A PVC membrane electrode for zn<sup>ll</sup> ion based on heterogeneous chelating inorganic ion exchange resin i.e.tetracycline hydrochloride sorbed tin(IV) tungstophosphate is reported. The electrode works well over a wide range of concentration (1.5 x 10<sup>-5 </sup>to 1 x 10<sup>-1</sup> M) with a Nernstian slope of 27.3 mV per decade of concentrations. The electrode shows a fast response time of 25s and operates in the pH range 4-6. The sensor can he used for more than three months without any divcrsence in the potential.The selectivity of the electrode was studied and was found that the electrode exhibits good selectivity for zinc ions over a wide variety of cations including alkaline earth, transition and heavy metal ions. The zinc ion selectivity electrode was used an indicator electrode for the potentiometric titration of zinc ions in solution against standard EDTA solution. The applicability of the senor to zinc(II) ion measurements in high tensile brass is also illustrated.

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