Development of an electrochemistry apparatus for the heaviest elements

2008 ◽  
Vol 96 (6) ◽  
Author(s):  
A. Toyoshima ◽  
Yoshitaka Kasamatsu ◽  
Y. Kitatsuji ◽  
K. Tsukada ◽  
H. Haba ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Carbon Fibers ◽  
Glassy Carbon ◽  
Cation Exchanger ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Electrolytic Cell ◽  
New Apparatus ◽  
Elution Behavior ◽  
Heaviest Elements

SummaryWe developed a new apparatus for the study of electrochemical properties of the heaviest elements. The apparatus is based on a flow electrolytic cell combined with column chromatography. Glassy-carbon fibers modified with Nafion perfluorinated cation-exchange resin are used as a working electrode as well as a cation-exchanger. The elution behavior of

scholarly journals The research of the possibility of using industrial effluents for the regeneration of Na-cation exchanger in the water treatment process

2020 ◽  
Vol 61 (2) ◽  
pp. 139-144
Author(s):  
Svetlana E. Pratskova ◽  
◽  
Aleksandr V. Kolesnikov ◽  
Alena O. Kuvaeva ◽  
Oksana U. Kuznetsova ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Water Treatment ◽  
Cation Exchange ◽  
Sodium Sulfate ◽  
Cation Exchanger ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Industrial Effluents ◽  
Exchange Capacity ◽  
Water Treatment Process

One of the main tasks of environmental protection enterprises is to reduce industrial effluents. Industrial effluents with a content of sodium chloride 24-25% and sodium sulfate 1.5-3.0% are formed at one of the plants. The high content of sodium chloride in the effluent allowed us to make an assumption about the possibility of their use in the regeneration of Na-cation exchanger in the process of water treatment for vapor-vapor cooling of operating metallurgical units. The aim of the work was to determine the feasibility of using industrial salt effluents in the water treatment process while ensuring optimal conditions for the operation of Na-cation exchanger. In the process of water treatment used the method of removing impurities from water - cationization. This method is applied to soften water and is of independent importance in the preparation of additional water for low pressure boilers and make-up water for heating networks, if the source water has low alkalinity. The object of the study is a strongly acidic cation exchanger in the Na-form (Purolite PPC-100Na) designed to soften process water. In the course of the regeneration of cation exchange resin with a sodium sulfate-containing salt solution, the concentration of the latter should be controlled - this is due to the high exchange capacity and the real danger of the formation of the gypsum layer. The volume of spent regeneration solution (OPP) will contain sparingly soluble calcium sulfate and soluble magnesium sulfate. Under certain conditions, most of the calcium sulfate can be separated from the ORP in the form of a suspension of a two-water compound and detached from the solution. Laboratory studies were conducted on the effect of a solution of NaCl salt (24-25%) with an admixture of sodium sulfate (1.5-3.0%) on the total and working exchange capacity of cation exchange resin. In order to reduce the salt background of the regenerated solution, studies were carried out on the use of a 10% NaCl salt solution with an admixture of sodium sulfate (1.5-3.0%) on the static, dynamic and full dynamic working exchange capacity of cation exchange resin (SOE, DOE and PDOE). We used the methods of alkalimetric and complexometric titration to control the capacity value of the cation. It was determined that the numerical values of the DOE and PDOE of the studied cation exchanger during its regeneration with a saline solution of sodium chloride with a content of 1.5-3.0% sodium sulfate vary in the range of 1.96-1.22 and 2.58-1.89 mEq/g dry resin, respectively.

Synthesis, Characterization and Performance Validation of Hybrid Cation Exchanger Containing Hydrated Ferric Oxide Nanoparticles (HCIX-Fe) for Lead Removal from Battery Manufacturing Wastewater

2016 ◽  
Vol 718 ◽  
pp. 67-71
Author(s):  
Nopphorn Chanthapon ◽  
Pornsawai Praipipat ◽  
Sudipta Sarkar ◽  
Surapol Padungthon
Keyword(s):  
Activated Carbon ◽  
Cation Exchange ◽  
Sulfonic Acid ◽  
Cation Exchanger ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Selective Removal ◽  
Lead Removal ◽  
Removal Capacity ◽  
Granulated Activated Carbon

This study is aimed to synthesize, characterize and validate the performance of a novel hybrid nanoadsorbent for selective removal of lead from a battery manufacturing wastewater. The hybrid nanosorbent, named as HCIX-Fe, was prepared by impregnating hydrated Fe (III) oxide (HFO) nanoparticles inside polymeric cation exchange resin containing negatively charged sulfonic acid (-SO3-) fixed functional groups. HCIX-Fe was characterized by SEM-EDX and XRD to confirm the distribution and determination of phase of HFO dispersed inside the hybrid nanosorbent. Fixed-bed column runs with HCIX-Fe beads were carried out using wastewater from a battery manufacturing plant. The wastewater had a pH of 1.8 and contained of 3.5 mg/L of Pb2+ coexisted with 250 mg/L Ca2+ ions. The results have shown that HCIX-Fe column could treat lead-contaminated water up to 6,500 bed volumes (BVs) before the occurrence of breakthrough concentration of 0.2 mg/L Pb2+ resulting in a removal capacity of 6.85 mg Pb2+/ml of the HCIX-Fe bed. Under similar condition, adsorbent columns with cation exchange resin (C100), granulated activated carbon (GAC) and granulated activated carbon impregnated with HFO (GAC-Fe), could treat the same wastewater only until 400, 900 and 1,500 BVs, respectively. When compared with the parent adsorbents, impregnation by HFO greatly enhanced the Pb2+ removal capacity of C100 and GAC by 1,625% and 167%, respectively. Both HFO and high density of sulfonic acid (-SO3-) in the host cation exchanger are individually capable of selective removal of Pb2+ ions; however the hybrid material demonstrated a synergistic effect for Pb2+ removal through the Donnan Membrane effect. Due to amphoteric behavior of HFO, the HCIX-Fe could be regenerated and reused with 10 BVs of 2% HNO3 and 1% FeCl3·6H2O solution.

Measurement of yield of residues produced in 12C+natY reaction and subsequent separation of 97Ru from Y target using cation exchange resin

2015 ◽  
Vol 103 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Moumita Maiti ◽  
Susanta Lahiri
Keyword(s):  
Cation Exchanger ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Liquid Extraction ◽  
Stacked Foil Technique ◽  
Subsequent Separation ◽  
Quantitative Separation ◽  
Solid Liquid Extraction ◽  
Solid Liquid ◽  
Induced Reaction

Abstract This paper reports the yield of no-carrier-added (NCA) radionuclides produced in 12C6+ induced reaction on natural yttrium target at 10 different incident energies in the range of 40 to 75 MeV by the stacked-foil technique, followed by off-line γ-ray spectroscopy. It also reports the radiochemical separation of NCA 97Ru from the bulk yttrium target. 97Ru was produced in the yttrium matrix through 89Y(12C, 4n)97,97mRh(EC)97Ru and 89Y(12C, p3n)97Ru reactions along with the radioisotopes 98Rh, 97Rh, 97mRh, 93Tc, 94Tc, 95Tc and 93mMo. Irradiated target was allowed to cool for the complete decay of short-lived residues and 97Ru was then separated from the bulk yttrium using the cation exchanger DOWEX-50WX4 in an ion exchange column as well as via solid-liquid extraction (SLX). A total of ∼88% NCA 97Ru was separated in column chromatography without any contamination of bulk, whereas quantitative separation of NCA Ru was achieved in SLX.

The sorption of electrolytes by a cation-exchange resin membrane

1955 ◽  
Vol 232 (1191) ◽  
pp. 485-498 ◽  
Keyword(s):  
Sodium Chloride ◽  
Hydrochloric Acid ◽  
Magnesium Sulphate ◽  
Magnesium Chloride ◽  
Cation Exchanger ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Resin Phase ◽  
Polyelectrolyte Solutions ◽  
Resin Membrane

The sorption of hydrochloric acid, sodium chloride, sodium bromide, magnesium chloride and magnesium sulphate from aqueous solutions at nine concentrations up to 1m by a disk of the cation exchanger Zeo-Karb 315 has been measured at 25° C. Determinations at 15 and 35° C show that the temperature coefficient is very small. The volume of the disk in contact with these solutions has also been measured. The results are used to obtain the activity coefficients of the electrolytes in the resin phase. The significance of these is examined in terms of the Katchalsky & Lifson theory of polyelectrolyte solutions which seems more applicable than the ion fixation theory.

Selective Co(ii) removal from aqueous media by immobilizing silver nanoparticles within a polymer-matrix through a formaldehyde cross linking agent

RSC Advances ◽  
2015 ◽  
Vol 5 (30) ◽  
pp. 23340-23349 ◽  
Author(s):  
S. Siva ◽  
S. Sudharsan ◽  
R. Sayee Kannan
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Cation Exchange ◽  
Polymer Matrix ◽  
Cation Exchanger ◽  
Exchange Resin ◽  
Phenol Formaldehyde ◽  
Aqueous Media ◽  
Cation Exchange Resin ◽  
Cross Linking

A novel hybrid cation exchange resin was developed by encapsulating AgNPs within a macroporous phenol–formaldehyde cation exchanger for the removal of cobalt from aqueous solution.

Stabilization of pH in Solid-matrix Hydroponic Systems

HortScience ◽  
1993 ◽  
Vol 28 (10) ◽  
pp. 981-984 ◽  
Author(s):  
Jay Frick ◽  
Cary A. Mitchell
Keyword(s):  
Seed Yield ◽  
Seed Oil ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Solid Matrix ◽  
Resin Bead ◽  
Resin Beads ◽  
Hydroponic Systems ◽  
Ethanesulfonic Acid ◽  
Substrate Ph

2-[N-morpholino] ethanesulfonic acid (MES) buffer or Amberlite DP-1 (cation-exchange resin beads) were used to stabilize substrate pH of passive-wicking, solid-matrix hydroponic systems in which small canopies of Brassica napus L. (CrGC 5-2, genome: ACaacc) were grown to maturity. Two concentrations of MES (5 or 10 m m) were included in Hoagland 1 nutrient solution. Alternatively, resin beads were incorporated into the 2 vermiculite: 1 perlite (v/v) growth medium at 6% or 12% of total substrate volume. Both strategies stabilized pH without toxic side effects on plants. Average seed yield rates for all four pH stabilization treatments (13.3 to 16.9 g·m-2·day-1) were about double that of the control (8.2 g·m-2·day-1), for which there was no attempt to buffer substrate pH. Both the highest canopy seed yield rate (16.9 g·m-2·day-1) and the highest shoot harvest index (19.5%) occurred with the 6% resin bead treatment, even though the 10 mm MES and 12% bead treatments maintained pH within the narrowest limits. The pH stabilization methods tested did not significantly affect seed oil and protein contents.

Sign in / Sign up

Export Citation Format

Share Document