Anionic exchange for NOM removal and the effects on micropollutant adsorption competition on activated carbon

Efficient removal of per- and polyfluoroalkyl substances (PFASs) in drinking water treatment: nanofiltration combined with active carbon or anion exchange

“…9,13,27 The performance difference between GAC and AIX could therefore be explained by the lower capacity of AIX resin for organic matter. 44 Thus, higher organic matter concentrations in the membrane reject water possibly influenced the overall PFAS removal performance of AIX to a lesser extent than the GAC performance. It was expected that the AIX adsorption capacity would be adversely affected by the greater concentrations of sulphate, bicarbonate, and organic matter in the membrane reject water, however AIX seemed to be influenced by the water quality only to a small extent.…”

Projecting competition between 2-methylisoborneol and natural organic matter in adsorption onto activated carbon from ozonated source waters

“…It was reported that the large humics are normally adsorbed on the surface of activated carbon (Ando et al, 2010), while MIB is reported to be mainly associated with the micropores (Yu et al, 2007). Also, the ionizable character induced by resin isolation procedures (elution at low pH, the neutrals and bases fractions discarded), might have accounted for the reported lower adsorption and interference at neutral pH (Hu et al, 2014;Matsui et al, 2012;McCreary and Snoeyink, 1980). The stronger competitive effects in JZ and MPS were likely related to relatively high LMWOC/ LMWUV (cf.…”

“…The interference mechanisms are direct competition for internal adsorption sites and pore blockage with macromolecules (Li et al, 2003). Direct competition is the dominant factor for low molecular weight (LMW) NOM molecules, with aromatic NOM inducing stronger competitive effects (Hu et al, 2014;Zietzschmann et al, 2014). In O 3 -BAC treatment, ozonation prior to adsorption may affect NOM characteristics, e.g.…”

Adsorption of creatinine on active carbons with nitric acid hydrothermal modification

“…Therefore, we are trying to develop new surface functioned AC adsorbents, and looking forward to collaborate with Sanford Healthcare to develop some real tests with clinic dialysis liquid samples, and consider competition from other biomolecules. In addition, one crucial factor impacting adsorption of creation by AC is the depletion of adsorption sites [44], competition and pore blockage during active carbon adsorption hampers the adsorption efficiency [45]. More work is needed to better understand how to optimize the adsorption of creatinine and other toxins in the blood.…”