Influence of membrane, solute and solution properties on the retention of phenolic compounds in aqueous solution by nanofiltration membranes

López-Muñoz, Marı́a José; Sotto, Arcadio; Arsuaga, Jesús M.; Bruggen, Bart Van der

doi:10.1016/j.seppur.2008.11.001

Cited by 132 publications

(61 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Results show an important diminution in membrane performance after long periods of membrane use, revealed through the important decrease of the permeability coefficients of water (about 34%) and NaCl (about 69%), probably due to the adsorption of 4NP and 4NA on the membrane, as it has been described by different authors for other organic compounds [41,42]. The membrane treatment with ultrasounds leads to an increase of permeability coefficients of water (about 10%) and NaCl (about 34%), compared with those before ultrasounds treatment, but also to an important decrease of all permeability coefficients, if compared with the initial conditions (diminutions of about 28% for water, 58% for NaCl and 46% for 4NP and 4NA).…”

Section: Effect Of Ultrasound Membrane Cleaning On Membrane Behaviorsupporting

confidence: 60%

Behaviour of RO90 membrane on the removal of 4-nitrophenol and 4-nitroaniline by low pressure reverse osmosis

Hidalgo

León

Gómez

et al. 2015

Journal of Water Process Engineering

View full text Add to dashboard Cite

Section: Effect Of Ultrasound Membrane Cleaning On Membrane Behaviorsupporting

confidence: 60%

Behaviour of RO90 membrane on the removal of 4-nitrophenol and 4-nitroaniline by low pressure reverse osmosis

Hidalgo

León

Gómez

et al. 2015

Journal of Water Process Engineering

View full text Add to dashboard Cite

“…The average pore radius of virgin and chemically cleaned membrane was determined from the rejection data of the reference solutes and the pore transport model that incorporates hindered convection (size exclusion) and diffusion. This method has been widely used to determine the average pore size of nanofiltration membranes [30][31][32]. It is assumed in the pore transport model that the membrane pores are uniform and cylindrical and the solutes are spherical.…”

Section: Estimating the Average Membrane Pore Radiusmentioning

confidence: 99%

Effects of caustic cleaning on pore size of nanofiltration membranes and their rejection of trace organic chemicals

Simon

McDonald

Khan

et al. 2013

Journal of Membrane Science

View full text Add to dashboard Cite

The aim of this study was to assess the impact of caustic cleaning on the rejection of three different trace organic chemical (TrOC) groups (i.e. neutral hydrophilic, neutral hydrophobic and negatively charged) by two nanofiltration (NF) membranes -namely NF270 and NF90. Chemical cleaning was simulated by exposing virgin membrane samples to commercial caustic cleaning formulations as well as sodium hydroxide solutions containing analytical grade additives such as sodium dodecyl sulfate or ethylenediaminetetraacetic acid. The membrane average pore size before and after exposure to a commercially available caustic cleaning formulation was determined based on the pore transport model. The results show that caustic chemical cleaning could cause an increase in the membrane pore size, leading to an increase in permeability and decrease in rejection of conductivity. The impact of caustic cleaning on the pore size and solute rejection was a function of the membrane active skin layer and the chemistry of the cleaning formulation. Caustic cleaning led to a small increase in pore size of the NF270 membrane and resulted in a notable increase in the permeability and salt passage. By contrast, the impact on the NF90 membrane was negligible. The influence of caustic cleaning on TrOC rejection was dependent on physical characteristics of each TrOC including their molecular size, charge, and hydrophobicity. The rejection of neutral and hydrophobic TrOC by the NF270 membrane decreased significantly after exposure to caustic cleaning formulation. However, because the rejection of negatively charged TrOC is governed mostly by electrostatic interaction, their rejection was not significantly affected by caustic cleaning.

show abstract

“…Separation behaviours of some trace organic contaminants can be quite different from those of inorganic salts (Bellona and Drewes, 2005;Bellona et al, 2004;López-Muñoz et al, 2009;Nghiem et al, 2006;Nghiem et al, 2004;Van der Bruggen et al, 2006). By altering the membrane surface characteristics, membrane fouling can exert a considerable impact on the removal of trace organic contaminants by NF/RO membranes (Agenson and Urase, 2007;Nghiem and Coleman, 2008;Nghiem et al, 2008a;Nghiem et al, 2008b;Verliefde et al, 2009;Xu et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Effects of hypochlorite exposure on morphology and trace organic contaminant rejection by NF/RO membranes

Simon

Nghiem

2014

Membr. Water Treat.

View full text Add to dashboard Cite

The impacts of membrane degradation due to chlorine attack on the rejection of inorganic salts and trace organic contaminants by nanofiltration (NF) and reverse osmosis (RO) membranes were investigated in this study. The rejection of trace contaminants was examined at environmentally relevant concentrations. Changes in the membrane surface morphology were observed as a result of chlorine exposure. A small increase in rejection was consistently observed with all four membranes selected in this study after being exposed to a low concentration of hypochlorite (100 ppm). In contrast, a higher concentration of hypochlorite (i.e., 2000 ppm) could be detrimental to the membrane separation capacity. Membranes with severe chlorine impact showed a considerable decrease in rejection over filtration time, possibly due to rearrangement of the polyamide chains under the influence of chlorine degradation and filtration pressure. The reported results indicate that loose NF membranes are more sensitive to chlorine exposure than RO membranes. The impact of hypochlorite exposure (both positive and negative) on rejection is dependent on the strength of the hypochlorite solution and is more significant for the neutral carbamazepine compound than the negatively charged sulfamethoxazole. AbstractThe impacts of membrane degradation due to chlorine attack on the rejection of inorganic salts and trace organic contaminants by nanofiltration (NF) and reverse osmosis (RO) membranes were investigated in this study. The rejection of trace contaminants was examined at environmentally relevant concentrations.Changes in the membrane surface morphology were observed as a result of chlorine exposure. A small increase in rejection was consistently observed with all four membranes selected in this study after being exposed to a low concentration of hypochlorite (100 ppm). In contrast, a higher concentration of hypochlorite (i.e.: 2000 ppm) could be detrimental to the membrane separation capacity. Membranes with severe chlorine impact showed a considerable decrease in rejection over filtration time, possibly due to rearrangement of the polyamide chains under the influence of chlorine degradation and filtration pressure.The reported results indicate that loose NF membranes are more sensitive to chlorine exposure than RO membranes. The impact of hypochlorite exposure (both positive and negative) on rejection is dependent on the strength of the hypochlorite solution and is more significant for the neutral carbamazepine compound than the negatively charged sulfamethoxazole.

show abstract

Influence of membrane, solute and solution properties on the retention of phenolic compounds in aqueous solution by nanofiltration membranes

Cited by 132 publications

References 29 publications

Behaviour of RO90 membrane on the removal of 4-nitrophenol and 4-nitroaniline by low pressure reverse osmosis

Behaviour of RO90 membrane on the removal of 4-nitrophenol and 4-nitroaniline by low pressure reverse osmosis

Effects of caustic cleaning on pore size of nanofiltration membranes and their rejection of trace organic chemicals

Effects of hypochlorite exposure on morphology and trace organic contaminant rejection by NF/RO membranes

Contact Info

Product

Resources

About