ion exchange resin Articles
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Vancomycin purification and extraction of other natural products used as pharmaceuticals
The case for substituting ion exchange resins with speciality activated ...
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Behaviour of radioactive iodine and bromine from aqueous solutions on the ion-exchange resin Duolite A-113
The iodide and bromide forms of the ion exchange resin Duolite A-113 were equilibrated separately with respectively labelled iodide and bromide ion solutions of different concentrations, varying from 0.005 M to 0.100 M in the temperature range of 26.0°C to 43.0°C. The distribution coefficient Kd values calculated for iodide and bromide ion exchanges increase with the ionic concentration of the ...
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Removal of algogenic organic matter by magnetic ion exchange resin pre-treatment and its effect on fouling in ultrafiltration
Natural organic matter (NOM) fouling continues to be the major barrier to efficient application of ultrafiltration (UF) in drinking water treatment. Algogenic organic matter (AOM), the main contributor to total NOM levels in raw waters characterised by elevated algae levels, is currently the subject of much investigation. In this study, the effect of AOM on fouling of ultrafiltration and the ...
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A study on the distribution coefficient of bromide ions from aqueous solution on ion exchange resins Duolite A-101D and Duolite A-102D
The ion exchange resins Duolite A-101D and Duolite A-102D in bromide form were equilibrated separately with labelled radioactive bromide ion solutions of different concentrations varying from 0.005 M to 0.100 M in the temperature range of 25.0°C to 45.0°C. The Kd values of bromide ions for Duolite A-102D were higher than that for Duolite A-101D under identical experimental conditions. The ...
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Impact of magnetic ion exchange resin pretreatment on alleviating UF membrane fouling
The purpose of this study is to undestand the effect and mechanism of preventing ultrafiltration(UF) membrane fouling by using magnetic ion exchange resin (MIEX®) in terms of fractional compent and molecular weight of NOM. In the experiment, pretreatment decreasing trans-membrane pressure and preventing membrane fouling were studied. The result showed: when the MIEX® dosage reached 800 bed volume ...
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The binding of metal ions to molecularly-imprinted polymers
Imprinting polymerization is a flexible method to make resins specific for different compounds. Imprinting polymerization involves the polymerization of the resin in the presence of a template, here cadmium ions or arsenate. The template is then removed by washing, leaving specific binding sites in the resin. In water treatment, the removal of toxic metal ions is difficult due to the limited ...
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A study on the distribution coefficient of iodide ions from aqueous solution on some strongly basic anion exchange resins
The ion exchange resins Duolite A-116, Indion 830 Type-1 and Indion N-IP Type-2 in iodide form were equilibrated separately with labelled radioactive iodide ion solutions of different concentrations varying from 0.005 M to 0.020 M in the temperature range of 25.0°C to 40.0°C. The Kd values of iodide ions for Duolite A-116 and Indion N-IP Type-2 were higher than that for Indion 830 Type-1 under ...
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Pb–210 irradiation dose estimation for inhabitants living in high natural background areas on Pernambuco/Brazil
This work was designed to: (a) determine 210Pb concentration in human urine samples of inhabitants of two regions with high natural radiation in the state of Pernambuco - Brazil; (b) estimate radiation dose in bones as a result of this radionuclide incorporation. For this, urine samples of healthy and non–smoker subjects were studied. Pb–210 was separated by ion–exchange resin technique followed ...
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PFOA/PFOS Stormwater Treatment - Groundwater Remediation - Case Study
Industry: Military – Air National Guard Location: Horsham, PA Capacity: 250 GPM (946 liters per minute) Installed: 2021 Following several years of piloting ion exchange resin for the removal of perfluorinated compounds, CKS Engineers needed to design and construct a full-scale system to treat the former military base stormwater runoff before entering Neshaminy ...
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Removal of sodium and chloride ions from aqueous solutions using fique fibers (Furcraea spp.)
Fique fibers obtained from the leaves of Furcraea spp., a highly abundant plant in the mountains of South America, may offer an alternative as biosorbents in desalination processes as they exhibit high removal capacities (13.26 meq/g for chloride ions and 15.52 meq/g for sodium ions) up to four times higher than exchange capacities commonly observed in synthetic resins. The ion removal ...
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210 Pb in marine salt consumed by the inhabitants of Recife, Brazil
210 Pb is widely distributed in the marine environment. The aim of this research, therefore, was to determine 210 Pb concentrations in marine salt consumed by the population of Recife and calculate the ingestion dose of 210 Pb due to marine salt consumption. The ion exchange resin method was used. The concentration of 210 Pb varied from 4 to 365 Bq kg –1 in fresh weight. The ...
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IX heavy metal removal from 35% MgCl2 - Russia, 900 m3/d - Case Study
Project Description: Lenntech has been awarded a contract for the engineering, manufacturing and assembly for a heavy metal removal ion exchange system, mainly iron should be removed. The system is installed in the Russian Federation. The treated 35% Magnesium Chloride solution is used for the production of chemicals. The water desalination system is equipped withtop brand instrumentation and ...
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Water and Wastewater Treatment Chemicals: World Market Report
Provides continually updated analyses and forecasts for 11 product categories including activated carbon, chelates corrosion inhibitors, defoamers, ion exchange resins, inorganic flocculants, organic flocculants, oxidizers and biocides, pH adjustors, and scale inhibitors in 80 ...
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Demineralisation with ion exchange technology - The Netherlands, 900 m3/d - Case Study
Project Description: Lenntech has been awarded a contract for the engineering, manufacturing and assembly for an ion exchange system. The factory is located in the Netherlands. The demineralised water is used for the washing of aviation windows. The water desalination system is equipped with top brand instrumentation and equipment. The system is completely from European origin and will be ...
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Parametric, equilibrium and kinetic studies on the removal of mercury using ion exchange resin
This experimental research was an investigation into removal of mercury by using a strong acid cation resin, 001 × 7. Parametric experiments were conducted to determine the optimum pH, resin dosage, agitation speed and the effect of change in concentration in the range of 50–200 mg/L. High resin dosages favoured better removal efficiency but resulted in lower uptakes. Equilibrium experiments ...
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Applicability of ion exchange for NOM removal from a sulfate-rich surface water incorporating full reuse of the brine
The raw water of water treatment works ‘the Blankaart’ (Belgium) is characterized by high levels of NOM (Natural Organic Matter), alkalinity and sulfate. From 2006 until present, the possibility of applying fluidized ion exchange for NOM removal has been investigated at the plant. Pilot testing using Miex® (Magnetic Ion Exchange) resin demonstrated that under standard ...
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DOC Removal by MIEX® Process - Scaling-Up & Other Development Issues
Natural organic matter (NOM) is one of the main parameters which affects water quality and performance of water treatment processes. Current processes including coagulation, oxidation, filtration and adsorption are at times inadequate or uneconomic. Over the last two years, a consortium consisting of ICI Watercare and the Australian Water Quality Centre has developed a new continuous process to ...
By Ixom
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Development of a packed-bed reactor for the recovery of metals from industrial wastewaters
Affinity separation is becoming well established for the purification and recovery of metals from industrial wastewaters. Although the method has been successfully applied on a bench-scale, there is a need for reaction engineering studies to scale-up the process for use in large-scale wastewater purification and recovery of valuable metals. In this study, a pilot-scale packed-bed reactor has been ...
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A Simple Method to Reduce Disinfection By-product Formation
The formation of disinfection byproducts (DBP) during drinking water production has long been of concern toauthorities and consumers alike. Although most disinfectants form unwanted DBPs there is particular concern withchlorine disinfection as a variety of chlorinated compounds are formed with possible adverse health effects, includingtrihalomethanes (THMs). Strategies for controlling THM ...
By Ixom
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Electrodeionization - Ultrapure water
Continuous Electrodeionization Process The continuous electrodeionization process (CEDI), is a system that uses ion exchange resins and electricity for the production of ultrapure deionized water without chemical processes and without production stops. SIMPEC uses modular systems for the electrodeionization processes. The CEDI modules are installed at the exit of permeate coming from reverse ...
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