Corrigendum: Water Science and Technology: Water Supply 11(1), 7–14: Impact of magnetic ion exchange resin pretreatment on alleviating UF membrane fouling, H. Xu, W. Chen, J. Sun and Z. Yuan

2012 ◽  
Vol 12 (2) ◽  
pp. 258-258
Keyword(s):  
Ion Exchange ◽  
Water Supply ◽  
Membrane Fouling ◽  
Exchange Resin ◽  
Science And Technology ◽  
Ion Exchange Resin ◽  
Water Science ◽  
Magnetic Ion

Fate of steroid hormone micropollutant estradiol in a hybrid magnetic ion exchange resin-nanofiltration process

2019 ◽  
Vol 16 (8) ◽  
pp. 630
Author(s):  
Alessandra Imbrogno ◽  
Prantik Samanta ◽  
Andrea I. Schäfer
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Ion Exchange ◽  
Membrane Fouling ◽  
Exchange Resin ◽  
Environmental Concern ◽  
Steroid Hormone ◽  
Ion Exchange Resin ◽  
Feed Water ◽  
Magnetic Ion

Environmental contextContamination of surface water by micropollutants is a major environmental concern because of their high persistence and toxicity. Micropollutants are only partially removed in nanofiltration water treatment systems, encouraging the investigation of more complex systems involving partitioning with membrane materials, organic matter and ion exchange resins. This study elucidates the micropollutant partitioning mechanisms in this complex water treatment system. AbstractThe accumulation of micropollutants, such as steroid hormones, in magnetic ion exchange resin-nanofiltration (MIEX-NF) poses a risk to the environmental contamination of surface water where the treated water is discharged. In this study, the partitioning of the steroid hormone estradiol (E2) with humic acid (HA), MIEX and the membrane is investigated at different feed water conditions (e.g. pH and presence of calcium). The transport and adsorption of E2 in NF is not affected significantly by the E2-HA interaction. Indeed, E2 partitions with HA between 8% and 25% at different pH. This is attributed to the presence of calcium ions, which reduces the number of HA molecules available to interact with E2 molecules. The calcium interference is evident especially at pH>10, where calcite and HA precipitate to result in irreversible membrane fouling. In the hybrid MIEX-NF process, the E2-MIEX interaction occurs at all pH conditions. Approximately 40% of the E2 total mass partitions with MIEX. This is significantly higher than E2 accumulation in NF. Since the partitioning is at least partially reversible, this poses a risk for accidental E2 release into the process streams.

Removal of algogenic organic matter by magnetic ion exchange resin pre-treatment and its effect on fouling in ultrafiltration

2011 ◽  
Vol 11 (1) ◽  
pp. 15-22 ◽  
Author(s):  
C. Liu ◽  
W. Chen ◽  
V. M. Robert ◽  
Z. G. Han
Keyword(s):  
Organic Matter ◽  
Ion Exchange ◽  
Membrane Fouling ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Major Barrier ◽  
Treated Water ◽  
Fouling Control ◽  
Pre Treatment ◽  
Magnetic Ion

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 effectiveness of magnetic ion exchange resin (MIEX®) pre-treatment for AOM removal and membrane fouling control was evaluated. The results showed that, the main species of algae in raw water were Chlorella vulgaris, which accounted for 80% of total algae. AOM was predominantly hydrophilic (50% or more) with a low SUVA (1.7 Lm−1 mg−1). Coagulation alone could not remove AOM effectively (less than 20%), however, when combined with magnetic ion exchange resin pre-treatment, more than 60% of AOM was be removed; pre-treatment followed by coagulation was observed to be very effective in controlling membrane fouling by AOM. The application of magnetic ion exchange resin technology at a bed volume treatment rate (BVTR) of 800 was observed to effectively eliminate fouling of UF membrane. Careful analyses of the molecular weight (MW) distribution of AOM and UV absorbance of treated water revealed that the effectiveness in membrane fouling control was the result of the changes in AOM molecular characteristics in treated water, namely a change in MW due to the preferential removal of high molecular proteins by coagulation and magnetic ion exchange resin pre-treatment. The results demonstrate that magnetic ion exchange resin followed by coagulation might be a new membrane pre-treatment option for UF membrane fouling control.

Impact of magnetic ion exchange resin pretreatment on alleviating UF membrane fouling

2011 ◽  
Vol 11 (1) ◽  
pp. 7-14 ◽  
Author(s):  
H. Xu ◽  
W. Chen ◽  
J. Sun ◽  
Z. Yuan
Keyword(s):  
Molecular Weight ◽  
Ion Exchange ◽  
Membrane Fouling ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Aluminium Chloride ◽  
Water Production ◽  
Pore Blocking ◽  
Production Ratio ◽  
Magnetic Ion

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 (BV), the polymeric aluminium chloride (PAC) dosage could be reduced to 14 mg/L, and the Trans-Membrane Pressure (TMP) could be recovered effectively after hydraulic flush. This pretreatment could remove most of the hydrophobic and hydrophilic charged organics as well as some neutral organics. Foulants of molecular weight (MW) <1000 dalton (Da) and 3000 Da < MW < 100,000 Da organics could be removed by 40.7% and 96.0%, respectively. By reducing pore blocking and membrane cake resistance, the ultrafiltration (UF) membrane reduced the total resistance of membrane. As a result, membrane fouling was alleviated and the water production ratio was enhanced.

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

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

Application of a Magnetic Resin (MIEX) in Raw Water

2013 ◽  
Vol 361-363 ◽  
pp. 801-804
Author(s):  
Jian Wei Ma ◽  
Ya Rui Song
Keyword(s):  
Ion Exchange ◽  
Natural Organic Matter ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Raw Water ◽  
Nitrogen And Phosphorus ◽  
Dissolved Organic Matters ◽  
Primary Focus ◽  
Magnetic Ion ◽  
Magnetic Resin

The objective of this research was to compare enhanced coagulation with anion exchange for removal of natural organic matter (NOM) and bromide. Treatment with a magnetic ion exchange resin (MIEX) was the primary focus of this study. The performance of the magnetic ion exchange resin,MIEX, in the treatment of raw water was investigated. MIEX can effectively remove UV-absorbing substances DOC. The removal of organic substances is accompanied by the elimination of other undesirable components, such as nitrogen and phosphorus. The optimal process parameters are at resin doses of 5-10 mL L1and contact time of 10-15 min, as determined via jartests. Based on this study, MIEX treatment is a suitable and efficient pretreatment method for the removal of extra dissolved organic matters and nitrates in raw water .

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