Understanding the potential for selective natural organic matter removal by ion exchange

Finkbeiner, Pascal; Redman, Jeremy A.; Patriarca, V.; Moore, Graeme; Jefferson, Bruce; Jarvis, Peter

doi:10.1016/j.watres.2018.09.042

Cited by 31 publications

(34 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To fractionate the DOC by their hydrophobicity, the samples were acidified and passed sequentially through XAD7 and XAD4 resin columns, which retain the hydrophobic (HPO) and transphilic (TPI) fraction, respectively (Finkbeiner et al, 2018). The effluent from the second column was collected as the hydrophilic (HPI) fraction.…”

Section: Discussionmentioning

confidence: 99%

“…This resin has been successfully tested in pilot and full-scale operation (Koreman and Galjaard, 2016;Metcalfe et al, 2015). A resin dose of 25 mL with a 30 min contact time was selected as it was representative of the conditions used in the full scale process (Finkbeiner et al, 2018). Jar tests were carried out using both virgin and pre-used IEX resin.…”

Section: Ion Exchange and Coagulation Testsmentioning

confidence: 99%

“…However, the variations and increase of NOM in surface waters has encouraged investigation of new technologies to improve overall NOM removal. This includes processes such as ion exchange (IEX), which has been successfully applied and proven to be particularly efficient when used in combination with coagulation (Finkbeiner et al, 2018;Kitis et al, 2007). The charge profile of the organic matter has been shown to be one of the dominant influences on its removal by IEX (Boyer and Singer, 2008).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The combined influence of hydrophobicity, charge and molecular weight on natural organic matter removal by ion exchange and coagulation

et al. 2020

Self Cite

View full text Add to dashboard Cite

Three different source waters were investigated using virgin and pre-used anion exchange resins, coagulation, and ion exchange combined with coagulation (IEX&Coagulation). The hydrophobicity, size distribution and charge of natural organic matter (NOM) were used to evaluate its removal. Dissolved organic carbon (DOC) removal by pre-used IEX resin was 67-79%. A consistent ratio of different hydrophobicity fractions was found in the removed DOC, while the proportion and quantity of the molecular weight fraction around 1 kDa was important in understanding the treatability of water. For pre-used resin, organic compounds were hypothesised to be restricted to easily accessible exchange sites. Comparatively, virgin resin achieved higher DOC removals (86-89%) as resin fouling was absent. Charge density and the proportion of the hydrophobic fraction were found to be important indicators for the specific disinfection byproduct formation potential (DBP-FP). Treatment of raw water with pre-used resin decreased the specific DBP-FP by between 2-43%, while the use of virgin resin resulted in a reduction of between 31-63%. The highest water quality was achieved when the combination of IEX and coagulation was used, reducing DOC and the specific DBP-FP well below that seen for either process alone.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Ion Exchange and Coagulation Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The combined influence of hydrophobicity, charge and molecular weight on natural organic matter removal by ion exchange and coagulation

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…For these reasons, NOM should be removed from drinking water. According to the European Union Council Directive 98/83/EC and the Lithuanian hygiene norm HN24:2017 "Drinking Water Safety and Quality Requirements", the total amount of organic matter (the permanganate index (PI) determines the amount of organic matter) should not exceed 5.0 mgO 2 /L.The most common technologies used for NOM removal are coagulation [11][12][13], coagulation and hallow-fibre nanofiltration [14], nanofiltration [15], biofiltration [3,4,16], ion exchange [17,18], various oxidation processes [19], carbon nanotubes [20], and adsorption by granulated active carbon [21,22].Coagulation is the most common method for NOM removal. Iron and aluminium salts are used in large amounts, and play an essential role in the production of drinking water and the removal of NOM, colour, and turbidity.…”

mentioning

confidence: 99%

“…The most common technologies used for NOM removal are coagulation [11][12][13], coagulation and hallow-fibre nanofiltration [14], nanofiltration [15], biofiltration [3,4,16], ion exchange [17,18], various oxidation processes [19], carbon nanotubes [20], and adsorption by granulated active carbon [21,22].…”

mentioning

confidence: 99%

Sustainable Reuse of Groundwater Treatment Iron Sludge for Organic Matter Removal from River Neris Water

Albrektienė

Karaliūnas²,

Bazienė

2019

Sustainability

View full text Add to dashboard Cite

The most important advances in sustainability in the water industry are focused on the reuse of water treatment sludge. The Antaviliai Water Supply Plant, which is located in Lithuania, treats groundwater by removing iron and manganese from it. This technology does not produce water waste, as the iron sludge is used for recycling. In this study, iron sludge received from groundwater treatment is used to remove natural organic matter from river Neris water, which can be used as drinking water. Twelve doses (from 1 to 6 g/L and from 0.1 g/L to 0.9 g/L) of iron sludge powder, with acid and without it, were used. The most effective removal of organic compounds (55.51%) and reduction in water colour (53.12%) were observed when 0.3 g of iron sludge powder and 8 ml of 0.95% H 2 SO 4 solution were added to the tested water. It was found that the use of a conventional coagulant (Al 2 (SO 4 ) 3 *17H 2 O), with and without iron sludge powder, decreased the concentration of organic compounds and water colour from 2.8 to 28.2% compared with the use of a pure coagulant (Al 2 (SO 4 ) 3 *17H 2 O) alone.Sustainability 2019, 11, 639 2 of 15 with granular activated carbon and membrane filtration [8], has an influence on pipeline corrosion [9], and has an influence on bacterial regrowth in distribution systems [10]. For these reasons, NOM should be removed from drinking water. According to the European Union Council Directive 98/83/EC and the Lithuanian hygiene norm HN24:2017 "Drinking Water Safety and Quality Requirements", the total amount of organic matter (the permanganate index (PI) determines the amount of organic matter) should not exceed 5.0 mgO 2 /L.The most common technologies used for NOM removal are coagulation [11][12][13], coagulation and hallow-fibre nanofiltration [14], nanofiltration [15], biofiltration [3,4,16], ion exchange [17,18], various oxidation processes [19], carbon nanotubes [20], and adsorption by granulated active carbon [21,22].Coagulation is the most common method for NOM removal. Iron and aluminium salts are used in large amounts, and play an essential role in the production of drinking water and the removal of NOM, colour, and turbidity. A large amount of iron-rich drinking water treatment sludge is produced during coagulation. That sludge requires handling and ultimate disposal through, e.g., landfill [23]. The term "water treatment sludge" (further referred to as the WTS) covers all wastes produced during the treatment of water in the WTS, and the properties of the WTS depend typically on the quality of the raw water and the applied treatment method [24]. The most important advances in sustainability in the water industry are focused on minimizing energy usage and reusing wastewater sludge. The conventional coagulant treatment has a considerable impact on the improvement of sustainability through coagulant recovery, which enables the atoms of coagulant metals to be repeatedly recycled and reused [25]. Different techniques have been adopted to recover iron or aluminium salts from the precipitate: ac...

show abstract

Physico‐chemical processes

Ouyang

Chen

Shi

et al. 2019

Water Environment Research

View full text Add to dashboard Cite

The review scans research articles published in 2018 on physico‐chemical processes for water and wastewater treatment. The paper includes eight sections, that is, membrane technology, granular filtration, flotation, adsorption, coagulation/flocculation, capacitive deionization, ion exchange, and oxidation. The membrane technology section further divides into six parts, including microfiltration, ultrafiltration, nanofiltration, reverse osmosis/forward osmosis, and membrane distillation.Practitioner points Totally 266 articles on water and wastewater treatment have been scanned; The review is sectioned into 8 major parts; Membrane technology has drawn the widest attention from the research community.

show abstract

Understanding the potential for selective natural organic matter removal by ion exchange

Cited by 31 publications

References 23 publications

The combined influence of hydrophobicity, charge and molecular weight on natural organic matter removal by ion exchange and coagulation

The combined influence of hydrophobicity, charge and molecular weight on natural organic matter removal by ion exchange and coagulation

Sustainable Reuse of Groundwater Treatment Iron Sludge for Organic Matter Removal from River Neris Water

Physico‐chemical processes

Contact Info

Product

Resources

About