Modelling the NOM uptake by anion exchange resins in drinking water plants

Pürschel, M.; Ender, Volker; Worch, Eckhard

doi:10.1080/19443994.2014.880381

Cited by 5 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the removal of hydrophobics fraction can be explained by physical adsorption. It was also stated by Pürschel et al [ 52 ] that polystyrene resin provides a better organic removal and removes hydrophobic neutral fraction through π–π bonding.…”

Section: Resultsmentioning

confidence: 87%

Removal of Organics with Ion-Exchange Resins (IEX) from Reverse Osmosis Concentrate

et al. 2023

View full text Add to dashboard Cite

Reverse osmosis concentrate (ROC) produced as the by-product of the reverse osmosis process consists of a high load of organics (macro and micro) that potentially cause eco-toxicological effects in the environment. Previous studies focused on the removal of such compounds using oxidation, adsorption, and membrane-based treatments. However, these methods were not always efficient and formed toxic by-products. The impact of ion-exchange resin (IEX) (Purolite®A502PS) was studied in a micro-filtration–IEX hybrid system to remove organics from ROC for varying doses of Purolite® A502PS (5–20 g/L) at a flux of 36 L/m2h. The purolite particles in the membrane reactor reduced membrane fouling, evidenced by the reduction of transmembrane pressure (TMP), by pre-adsorbing the organics, and by mechanically scouring the membrane. The dissolved organic carbon was reduced by 45–60%, out of which 48–81% of the hydrophilics were removed followed by the hydrophobics and low molecular weight compounds (LMWs). This was based on fluorescence excitation-emission matrix and liquid chromatography-organic carbon detection. Negatively charged and hydrophobic organic compounds were preferentially removed by resin. Long-term experiments with different daily replacements of resin are suggested to minimize the resin requirements and energy consumption.

show abstract

Section: Resultsmentioning

confidence: 87%

Removal of Organics with Ion-Exchange Resins (IEX) from Reverse Osmosis Concentrate

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Purschel states that possible removal mechanisms of starch molecules, representatives for the polysaccharide BP, from a synthetic water at neutral and acidic pH by strong base AER (SBA) are ion-dipole and/or van der Waals interactions. In the case of 2-naphtol, a model compound for hydrophobic LMWN, the researchers point out π-π stacking and/or hydrophobic interactions as additional removal mechanisms [31]. In the work of Finkbeiner et al, hydrophobic effects and π − π stacking were proposed as main removal mechanisms for resorcinol, also a surrogate for hydrophobic LMWN, from a synthetic water at neutral pH, where the strongest interaction was found for styrenic resins.…”

Section: Introductionmentioning

confidence: 99%