Size Exclusion Chromatography To Characterize DOC Removal in Drinking Water Treatment

2005 ◽  
Vol 39 (7) ◽  
pp. 2334-2342 ◽  
Author(s):  
Bradley P. Allpike ◽  
Anna Heitz ◽  
Cynthia A. Joll ◽  
Robert I. Kagi ◽  
Gudrun Abbt-Braun ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Size Exclusion Chromatography ◽  
Drinking Water Treatment ◽  
Size Exclusion ◽  
Exclusion Chromatography

scholarly journals Step-by-step analysis of drinking water treatment trains using size-exclusion chromatography to fingerprint and track protein-like and humic/fulvic-like fractions of dissolved organic matter

2019 ◽  
Vol 5 (9) ◽  
pp. 1568-1581
Author(s):  
Alexey Ignatev ◽  
Tuula Tuhkanen
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Dissolved Organic Matter ◽  
Size Exclusion Chromatography ◽  
Drinking Water Treatment ◽  
Size Exclusion ◽  
Exclusion Chromatography

The removal of UV absorbing and fluorescent DOM fractions of tyrosine-, tryptophan-, and fulvic/humic-like compounds at different steps of drinking water treatment was systematically evaluated using size-exclusion chromatography.

scholarly journals Effects of ortho- and polyphosphates on lead speciation in drinking water

2018 ◽  
Vol 4 (4) ◽  
pp. 505-512 ◽  
Author(s):  
Benjamin F. Trueman ◽  
Wendy H. Krkošek ◽  
Graham A. Gagnon
Keyword(s):  
Drinking Water ◽  
Size Exclusion Chromatography ◽  
Size Exclusion ◽  
Lead Speciation ◽  
Exclusion Chromatography

Polyphosphates may increase lead solubilityviacomplexation, but the risk is not well characterized. Size-exclusion chromatography with multi-element detection could help determine the prevalence of lead-polyphosphate complexes in drinking water.

Evaluation of drinking water treatment processes focusing on natural organic matter removal and on disinfection by-product formation

2002 ◽  
Vol 2 (5-6) ◽  
pp. 459-464 ◽  
Author(s):  
S. Chae
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
High Performance ◽  
Drinking Water Treatment ◽  
Molecular Size ◽  
Product Formation ◽  
Size Exclusion ◽  
Activated Carbon Adsorption

The aim of this study was to characterize and compare natural organic matter (NOM) removal and disinfection by-product (DBP) formation in the drinking water treatment train that can give valuable information, while optimizing the treatment process. In this study, the determination of the hydrophobic (HPO), transphilic (THP) and hydrophilic (HPI) NOM distribution was used in parallel with more related drinking water parameters to compare the selected waters. High-performance size-exclusion chromatography (HPSEC) was applied to evaluate the relative changes of molecular size distribution of NOM in different treatment steps and source waters. This showed that the quantity, speciation and activated carbon adsorption of DBPs could vary not only by water quality, but also by the distribution and properties of the organic molecules that comprise NOM.

scholarly journals Addition of a magnetite layer onto a polysulfone water treatment membrane to enhance virus removal

2011 ◽  
Vol 63 (10) ◽  
pp. 2346-2352 ◽  
Author(s):  
I. Raciny ◽  
K. R. Zodrow ◽  
D. Li ◽  
Q. Li ◽  
P. J. J. Alvarez
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Flux ◽  
Drinking Water Treatment ◽  
Size Exclusion ◽  
Magnetite Nanoparticle ◽  
Virus Removal ◽  
Point Of Use ◽  
Simple Filtration ◽  
Nano Fe3o4

The applicability of low-pressure membranes systems in distributed (point of use) water treatment is hindered by, among other things, their inability to remove potentially harmful viruses and ions via size exclusion. According to the USEPA and the Safe Drinking Water Act, drinking water treatment processes must be designed for 4-log virus removal. Batch experiments using magnetite nanoparticle (nano-Fe3O4) suspensions and water filtration experiments with polysulfone membranes coated with nano-Fe3O4 were conducted to assess the removal of a model virus (bacteriophage MS2). The membranes were coated via a simple filtration protocol. Unmodified membranes were a poor adsorbent for MS2 bacteriophage with less than 0.5-log removal, whereas membranes coated with magnetite nanoparticles exhibited a removal efficiency exceeding 99.99% (4-log). Thus, a cartridge of PSf membranes coated with nano-Fe3O4 particles could be used to remove viruses from water. Such membranes showed negligible iron leaching into the filtrate, thus obviating concern about coloured water. Further research is needed to reduce the loss of water flux caused by coating.

Demonstrating ultra-filtration and reverse osmosis performance using size exclusion chromatography

2010 ◽  
Vol 62 (12) ◽  
pp. 2747-2753 ◽  
Author(s):  
R. K. Henderson ◽  
R. M. Stuetz ◽  
S. J. Khan
Keyword(s):  
Water Treatment ◽  
Reverse Osmosis ◽  
Size Exclusion Chromatography ◽  
Size Exclusion ◽  
Process Performance ◽  
Recycled Water ◽  
Low Concentrations ◽  
Exclusion Chromatography ◽  
Doc Concentration ◽  
Ultra Filtration

Advanced water treatment plants employing ultrafiltration (UF) and reverse osmosis (RO) membrane processes are frequently implemented for the production of high-quality recycled water. It is important that process performance is able to be quantified and assessed to ensure it is fit for purpose. This research utilizes size exclusion chromatography with organic carbon, organic nitrogen and UV254 detection to determine the change in both DOC concentration and character through a UF/3 stage-RO pilot plant. It was determined that 97% of the influent DOC was removed on average to produce a water of less than 0.5 mg L−1 as C. The UF process removed more than half of the biopolymer fraction, equating to 4.5% DOC removal, while the RO process generally removed all DOC except a small proportion of the low MW humics and acids and low MW neutral fraction. While not changing significantly in concentration, the Stage 3 RO permeate typically contained low concentrations of humic fraction, indicating a change in character and therefore a change in rejection mechanism. Overall, it was determined that while TOC monitoring is important in advanced water treatment systems, improved understanding of the character of the TOC present lends greater insight into the assessment of process performance.

scholarly journals Understanding the behaviour of molecular weight fractions of natural organic matter to improve water treatment processes

2010 ◽  
Vol 10 (1) ◽  
pp. 59-68 ◽  
Author(s):  
I. Kristiana ◽  
B. P. Allpike ◽  
C. A. Joll ◽  
A. Heitz ◽  
R. Trolio
Keyword(s):  
Molecular Weight ◽  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Drinking Water Treatment ◽  
Size Exclusion ◽  
Aromatic Character ◽  
Relative Contribution ◽  
Treatment Processes

Water utilities have experienced increasing pressure to minimise the formation of disinfection by-products (DBPs), as reflected in the increasingly stringent regulations and guidelines for the concentrations of DBPs in drinking water. Understanding the disinfection characteristics and molecular weight (MW) distribution of natural organic matter (NOM) will assist in the optimisation of drinking water treatment processes to minimise the formation of DBPs. This study investigated the disinfection behaviour of MW fractions of NOM isolated from a Western Australian source water. The NOM was fractionated and separated using preparative size exclusion chromatography (SEC) and the fractions were chlorinated in the presence of bromide ion. The larger MW fractions of NOM were found to produce the highest concentrations of DBPs (trihalomethanes, haloacetic acids, haloacetonitriles, haloketones, and haloaldehydes), with the low MW fractions still producing significant amounts of these DBPs. The results also showed a trend of an increasing proportion of brominated DBPs with decreasing MW and aromatic character. Considering that the smaller MW fractions of NOM produce significant amounts of DBPs, with a higher relative contribution from brominated DBPs, water treatment processes need to be optimised for either bromide removal or the removal of aliphatic, small MW fractions of NOM, in order to meet DBP guidelines and regulations.

ASSESSMENT OF ELECTROCOAGULATION PROCESS FOR DRINKING WATER TREATMENT

2015 ◽  
Vol 14 (6) ◽  
pp. 1347-1354 ◽  
Author(s):  
Florica Manea ◽  
Anamaria Baciu ◽  
Aniela Pop ◽  
Katalin Bodor ◽  
Ilie Vlaicu
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Electrocoagulation Process
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