Rejection of pharmaceutically active compounds and endocrine disrupting compounds by clean and fouled nanofiltration membranes

Yangali-Quintanilla, Victor; Sadmani, A.H.M. Anwar; McConville, Megan; Kennedy, Maria D.; Amy, Gary L.

doi:10.1016/j.watres.2009.02.027

Cited by 161 publications

(81 citation statements)

References 28 publications

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“…These results suggest that a major rejection mechanism for nonionic hydrophilic compounds remained size exclusion. This is consistent with the findings of Yangali-Quintanilla et al, who attributed rejection of nonionic compounds to the sieving phenomenon (Yangali-Quintanilla et al, 2009). Table 4 shows the summary of the observed rejection mechanisms of the target compounds by the virgin membrane.…”

Section: Nonionic Hydrophilic Compoundssupporting

confidence: 90%

“…According to YangaliQuintanilla et al, the observed retention of naproxen and ibuprofen by a NF200 membrane was due to the combined influence of steric hindrance and electrostatic repulsion (Yangali-Quintanilla et al, 2009). However, in the current study, no significant relationship between the compounds MW and their rejection was observed.…”

Section: Negatively Charged Ionic Compoundsmentioning

confidence: 99%

“…Yangali-Quintanilla et al reported that the rejection of both charged and neutral compounds decreased due to the occurrence of cake enhanced concentration polarization (CECP) when alginate fouling was established on the membrane surface (Yangali-Quintanilla et al, 2009). It has also been reported that the rejection of compounds by NF membranes fouled with filtered and raw lake waters increased significantly (Comerton et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Effect of fouling on removal of trace organic compounds by nanofiltration

Hajibabania

Verliefde

Drewes

et al. 2011

Drink. Water Eng. Sci.

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Abstract. The fate of chemical of concern is not yet fully understood during treatment of impaired waters. The aim of this paper is to assess the impact of different organic-based fouling layers on the removal of a large range of trace organics. Both model and real water samples (mixed with trace organic contaminants at environmental concentration of 2 µg l −1 ) were used to simulate fouling in nanofiltration under controlled environment. The new and fouled membranes were systematically characterised for surface charge, hydrophobicity and roughness. It was observed that fouling generally reduced the membrane surface charge; however, the alterations of the membrane hydrophobicity and surface roughness were dependent on the foulants composition. The rejection of charged trace organics was observed to be improved due to the increased electrostatic repulsion by fouled membranes and the adsorption of the trace organic chemicals onto organic matters. On the other hand, the removal of nonionic compounds decreased when fouling occurred, due to the presence of cake enhanced concentration polarization. The fouling layer structure was found to play an important role in the rejection of the trace organic compounds.

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Section: Nonionic Hydrophilic Compoundssupporting

confidence: 90%

Section: Negatively Charged Ionic Compoundsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of fouling on removal of trace organic compounds by nanofiltration

Hajibabania

Verliefde

Drewes

et al. 2011

Drink. Water Eng. Sci.

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“…As a result, various parameters such as membrane properties, solution chemistry and physicochemical properties of the volatile organic compounds can significantly affect the removal efficiency of these components by NF/RO membranes [5,8]. Also YangaliQuintanilla et al [9] reported that the clean NF-90 membrane (virgin) rejected almost all of the hydrophobic neutral compounds (95-98%) mainly because of size exclusion. High rejection was achieved after using the RO stage (>99% for macrolides, pharmaceuticals, cholesterol and disinfection byproducts, 95% for diclofenac, and >93% removal of sulphonamides [10].…”

Section: Introductionmentioning

confidence: 99%

Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration

Altalyan

Jones

Bradd

et al. 2016

Journal of Water Process Engineering

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. (2016). Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration. Journal of Water Process Engineering, 9 9-21. Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration AbstractA comprehensive study was conducted to examine the removal of volatile organic compounds (VOCs) which exist in groundwater at Southlands-Botany Bay (Sydney region). The ability of nanofiltration (NF) and reverse osmosis (RO) as advanced treatments was investigated using two commercially available NF or RO membranes. Laboratory-scale tests were used with cross-flow; tests were conducted with 16 ubiquitous compounds that represented the significant volatile organic compounds found in the contaminated groundwater. The results reported in this study indicate that the removal efficiency of reverse osmosis (RO) was better than NF in rejecting the VOCs detected in groundwater. This study revealed that the performance of NF and RO membranes in rejecting hydrophilic volatile organic compounds was higher than that for hydrophobic compounds and the highest rejection achieved by NF and RO membranes amounted 98.4% and 100%, respectively. Hydrophilic compounds can be effectively rejected by NF/RO membranes using the size exclusion mechanism (steric hindrance), whereas hydrophobic compounds can be adsorbed into NF/RO membranes and then diffuse through the dense polymeric matrix, resulting in the lower removal for these compounds compared to hydrophilic compounds. Keywords:Volatile organic compounds (VOCs) Reverse osmosis (RO) Nanofiltration (NF) Botany Bay ABSTRACT A comprehensive study was conducted to examine the removal of volatile organic compounds (VOCs) which exist in groundwater at Southlands-Botany Bay (Sydney region).The ability of nanofiltration (NF) and reverse osmosis (RO) as advanced treatments was investigated using two commercially available NF or RO membranes. Laboratory-scale tests were used with cross-flow; tests were conducted with 16 ubiquitous compounds that represented the significant volatile organic compounds found in the contaminated groundwater.The results reported in this study indicate that the removal efficiency of reverse osmosis (RO) was better than NF in rejecting the VOCs detected in groundwater. This study revealed that the performance of NF and RO membranes in rejecting hydrophilic volatile organic compounds was higher than that for hydrophobic compounds and the highest rejection achieved by NF and RO membranes amounted 98.4 % and 100 %, respectively. Hydrophilic compounds can be effectively rejected by NF/RO membranes using the size exclusion mechanism (steric hindrance), whereas hydrophobic compounds can be adsorbed into NF/RO membranes and then diffuse through the dense polymeric matrix, resulting in the lower removal for these compounds compared to hydrophilic compounds.

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“…This is especially true in the case of the organic micropollutants (EDCs, PhACs, pesticides, etc), since their retention is determined by electrostatic, steric and hydrophobic/hydrophilic solute-membrane interactions, which can be modified due to foulants depositing on the membrane surface. The effect of fouling on organic micropollutant retention has been the subject of rather extensive research in the past decade (Ng & Elimelech, 2004;Xu et al, 2006;Plakas et al, 2006;Steinle-Darling et al, 2007;Agenson & Urase, 2007;Nghiem & Hawkes, 2007;Bellona et al, 2010;Nghiem & Coleman, 2008;Verliefde et al, 2009;Yangali-Quintanilla et al, 2009). Systematic investigations on the influence of colloidal and/or organic fouling on various trace organic species suggests that solute retention can be distinguished in two different cases, depending on the relative solute selectivities of the fouling layer and the membrane.…”

Section: Effect Of Membrane Foulingmentioning

confidence: 99%