Applicability of ion exchange for NOM removal from a sulfate-rich surface water incorporating full reuse of the brine

2012 ◽  
Vol 12 (6) ◽  
pp. 878-887 ◽  
Author(s):  
L. Verdickt ◽  
W. Closset ◽  
V. D'Haeseleer ◽  
J. Cromphout
Keyword(s):  
Ion Exchange ◽  
Removal Efficiency ◽  
Ion Exchange Resin ◽  
Operating Conditions ◽  
Column Experiments ◽  
Effluent Quality ◽  
Anion Exchange Resins ◽  
Total Organic Carbon Removal ◽  
Exchange Resins ◽  
Magnetic Ion

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 operating conditions, a TOC (Total Organic Carbon) removal efficiency of 40 to 50% can be achieved. Moreover, jar tests demonstrated that the application of ion exchange as a pretreatment for enhanced coagulation would allow the coagulant dose to be reduced by 60% without compromising effluent quality. Finally, column experiments were conducted to evaluate (i) the effect of full brine reuse and (ii) the possibility of using less expensive conventional ion exchange resins instead of the patented Miex® resin. Recuperation of the waste brine after flocculation with a ferric salt and dewatering was found to have no significant impact on the NOM removal efficiency. Column experiments with Miex® and conventional type 1 anion exchange resins revealed that the fluidization characteristics of both types of resin allow use in fluidized bed systems and that with both types of resin, similar NOM removal efficiencies can be attained. However, higher contact times are required when conventional resins are applied.

scholarly journals An innovative compound bed of EDI device with enhancing ion-exchange resins regeneration efficiency

2021 ◽  
Author(s):  
Xu Chen ◽  
Lida Wang ◽  
Zhuang Wan ◽  
Wen Sun ◽  
Zhengqing Yang ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Anion Exchange ◽  
High Efficiency ◽  
Operating Conditions ◽  
Ion Exchange Resins ◽  
Anion Exchange Resins ◽  
Influent Water ◽  
Regeneration Efficiency ◽  
Exchange Resins ◽  
Exchange Membrane

Abstract Electrodeionization (EDI) technology is limited by low regeneration efficiency of ion exchange resins, requirements of high-quality influent water, fouling of ion exchange membrane and electrode, etc. In this work, a novel bed type called compound bed that cation and anion exchange resins were near the cation and anion exchange membrane were placed in layers, was proposed to implement high-efficiency regeneration of ion exchange resins. The influence of different operating conditions on the regeneration efficiency of ion exchange resins was elucidated as well. The regeneration efficiency of ion exchange resins could reach 73.1%, when the device was operated for 5 h under current density of 9 mA/cm2, cation and anion exchange resins ratio of 2: 3, influent water conductivity of 1,360 μS/cm and hardness of 400 mg/L. Therefore, the proposed compound bed structure not only widened the inlet water conditions, but also achieved the high-efficiency regeneration of ion exchange resins and anti-fouling of membranes and electrodes.

scholarly journals Hyperkalaemia management and related costs in chronic kidney disease patients with comorbidities in Spain

2021 ◽  
Author(s):  
Antonio Olry de Labry Lima ◽  
Óscar Díaz Castro ◽  
Jorge M Romero-Requena ◽  
M de los Reyes García Díaz-Guerra ◽  
Virginia Arroyo Pineda ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Kidney Disease ◽  
Ion Exchange ◽  
Health Care Expenditures ◽  
Ion Exchange Resin ◽  
High Potassium ◽  
Electrolyte Disorder ◽  
Ckd Stage ◽  
Exchange Resins ◽  
Resin Treatment

ABSTRACT Background Hyperkalaemia (HK) is a common electrolyte disorder in patients with chronic kidney disease (CKD) and/or treated with inhibitors of the renin-angiotensin-aldosterone system (RAASi). The aim of this study is to determine the severity, current management and cost of chronic HK. Methods Retrospective cohort study of patients with chronic HK and CKD, heart failure or diabetes mellitus between 2011 and 2018. The study follow-up was 36 months. Results 1,499 patients with chronic HK were analysed, 66.2% presented mild, 23.4% moderate and 10.4% severe HK. The severity was associated with CKD stage. Most patients (70.4%) were on RAASi therapies, which were frequently discontinued (discontinuation rate was 39.8%, 49.8% and 51.8% in mild, moderate and severe HK, respectively). This RAASi discontinuation was similar with or without resin prescription. Overall, ion exchange resins were prescribed to 42.5% of patients with HK and prescription were related to the severity of HK, being 90% for severe HK. Adherence to resin treatment was very low (36.8% in the first year, 17.5% in the third year) and potassium persisted elevated in most patients with severe HK. The annual healthcare cost per patient with HK was 5,929€, reaching 12,705€in severe HK. Costs related to HK represent 31.9% of the annual cost per HK patient and 58.8% of the specialised care cost. Conclusions HK was usually managed by RAASi discontinuation and ion exchange resin treatment. Most patients with HK were non-adherent to resins and those with severe HK remained with high potassium levels, despite bearing elevated health care expenditures.

scholarly journals An Amberlite IRA-400 Cl− ion-exchange resin modified with Prosopis juliflora seeds as an efficient Pb2+ adsorbent: adsorption, kinetics, thermodynamics, and computational modeling studies by density functional theory

RSC Advances ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 4478-4488
Author(s):  
Sivaprakasam Anbazhagan ◽  
Venugopal Thiruvengadam ◽  
Anandhakumar Sukeri
Keyword(s):  
Density Functional Theory ◽  
Ion Exchange ◽  
Computational Modeling ◽  
Removal Efficiency ◽  
Adsorption Kinetics ◽  
Density Functional ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Prosopis Juliflora ◽  
Functional Theory

We have demonstrated a high Pb2+ removal efficiency (73.45%) from wastewater using a Prosopis juliflora-seed-modified Amberlite IRA-400 Cl− ion-exchange resin (SMA resin).

scholarly journals Magnetic ion-exchange resin treatment: Impact of water type and resin use

2008 ◽  
Vol 42 (8-9) ◽  
pp. 1977-1988 ◽  
Author(s):  
Max R.D. Mergen ◽  
Bruce Jefferson ◽  
Simon A. Parsons ◽  
Peter Jarvis
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Water Type ◽  
Magnetic Ion ◽  
Resin Treatment

Effects of pre-treatment with magnetic ion exchange resins on coagulation/flocculation process

2008 ◽  
Vol 57 (1) ◽  
pp. 57-64 ◽  
Author(s):  
B. Sani ◽  
E. Basile ◽  
C. Lubello ◽  
L. Rossi
Keyword(s):  
Ion Exchange ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Ion Exchange Resin ◽  
Test Procedures ◽  
Aggregation State ◽  
Jar Test ◽  
Pre Treatment ◽  
Magnetic Ion

A new Magnetic Ion EXchange resin for DOC (Dissolved Organic Carbon) removal (MIEX®DOC Resin) has been evaluated as water pre-treatment at the Drinking Water Treatment Plant (DWTP) of Florence in order to reduce the oxidant demand and disinfection by-products (DBPs) formation potential. This pre-treatment leads to several effects on downstream treatment processes. In this experimental study the effects of MIEX® pre-treatment on clariflocculation process were evaluated with respect to coagulant demand reduction and characteristics of flocs formed. The analysis was conducted using traditional jar test procedures and a Photometric Dispersion Analyser (PDA2000) which provided continuous information about the aggregation state of particles during the jar tests. For a fixed turbidity goal in clarified water, ion exchange pre-treatment led to coagulant dosage reduction up to 60% and PDA results shown that flocs formed in pre-treated water were bigger and more resistant to shearing effects than those formed by conventional clariflocculation.

scholarly journals THE STUDY OF SORPTION OF NICKEL, COBALT, COPPER IONS RECOVERY FROM MULTICOMPONENT SOLUTIONS BY VARIOUS ION EXCHANGE RESINS

2021 ◽  
pp. 45-52
Author(s):  
Людмила Сергеевна Авфукова
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Copper Ions ◽  
Ion Exchange Resin ◽  
Copper Recovery ◽  
Nickel Cobalt ◽  
Sorption Method ◽  
Modern Methods ◽  
Exchange Resins ◽  
Multicomponent Solutions

Статья посвящена одному из современных методов и технологий извлечения никеля, кобальта и меди из многокомпонентных растворов - сорбционный метод. В качестве сорбентов выступают ионообменная смола КУ-2-8 и хелатообразующие смолы. Рассмотрен один изметодов удаления веществ, сопутствующих, мешающих извлечению ценных компонентов, одним из которых является железо. The paper considers one of the modern methods and technologies of nickel, cobalt and copper recovery from multicomponent solutions; that is a sorption method. KU-2-8 ion exchange resin and chelating resins are present as sorbents. One of the method of substances which prevent removing valuable components is discussed. One of such substance is considered to be iron.

Removal of Humic Substances by Adsorption/Ion Exchange

1999 ◽  
Vol 40 (9) ◽  
pp. 173-182 ◽  
Author(s):  
Joachim Fettig
Keyword(s):  
Activated Carbon ◽  
Ion Exchange ◽  
Metal Oxides ◽  
Humic Substances ◽  
Predictive Models ◽  
Anion Exchange Resins ◽  
Sorption Equilibria ◽  
Exchange Resins ◽  
Favorable Conditions ◽  
Solution Parameters

This paper gives an overview over the ability of four different sorbent media, activated carbon, anion exchange resins, carbonaceous resins and metal oxides, for the removal of humic sustances. Both sorbent characteristics and solution parameters that affect the ultimate capacities are discussed, and approaches developed in order to describe sorption equilibria and rate of uptake are reported. In addition, successes and failures of predictive models are described. Some general conclusions about favorable conditions for the removal of humic substances by sorption processes are given.

A magnetic ion exchange resin with high efficiency of removing Cr (VI)

2020 ◽  
Vol 604 ◽  
pp. 125279
Author(s):  
Yafeng Ren ◽  
Youhua Han ◽  
Xingfeng Lei ◽  
Chuan Lu ◽  
Jin Liu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
High Efficiency ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Magnetic Ion

Performances and Mechanism of Methyl Orange and Congo Red Adsorbed on the Magnetic Ion-Exchange Resin

2020 ◽  
Vol 65 (2) ◽  
pp. 725-736 ◽  
Author(s):  
Yunhan Jia ◽  
Lei Ding ◽  
Peiyue Ren ◽  
Meiying Zhong ◽  
Jiangya Ma ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Ion Exchange ◽  
Congo Red ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Magnetic Ion
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