Natural organic matter interactions with polyamide and polysulfone membranes: Formation of conditioning film

Gutierrez, Leonardo; Aubry, Cyril; Linares, Rodrigo Valladares; Croué, Jean-Philippe

doi:10.1016/j.colsurfa.2015.03.031

Cited by 29 publications

(11 citation statements)

References 44 publications

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“…However, approximately 67% of CEM images showed clean membrane surfaces (Figure 7 right). This trend, also observed in the reference membranes, would be explained by the stronger interactions between positively-charged functional groups on AEMs and negatively-charged organics; thus, leading to conditioning film formation [51]. On all membranes, the presence of bacteria and a biofilm was confirmed.…”

Section: Ref1supporting

confidence: 68%

Secondary treated domestic wastewater in reverse electrodialysis: What is the best pre-treatment?

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Vooren

Gutierrez

et al. 2019

Separation and Purification Technology

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art Highlights  RED-RO is a promising technology for energy-efficient seawater desalination  Secondary-treated wastewater is a potential low salinity source for RED  An efficient pre-treatment of wastewater is needed before use in RED  Rapid sand filtration and 100 µm provide efficient wastewater pre-treatment  River bank filtration does not provide adequate feed water quality AbstractAlthough Reverse Electrodialysis (RED) is most commonly known as a selective separation technology used for the production of sustainable energy, it can also serve as a valuable pre-desalination tool. By coupling RED to Reverse Osmosis (RO) for seawater desalination: (1) sustainable energy is produced in the RED process and (2) seawater is partially desalinated prior to RO thus, decreasing the energy demand. In this study, secondary-treated wastewater is proposed as the low salinity source in RED and suitable pre-treatment techniques for this effluent are investigated. Although it is generally accepted that RED is less prone to fouling than typical pressure driven membrane processes, results showed that pre-treatment is a key to ensure efficient operation of the wastewater-seawater RED. Both 100 µm filtration and rapid sand filtration proved to be suitable, with an increase in pressure drop of only 0.09-0.18 bar and a permselectivity decrease of only approximately 20% during 40 days of continuous operation. Conversely, River bank filtration did not perform better than the non-pretreated sample. As such, 100 µm filtration and rapid sand filtration are considered suitable, robust, and cost efficient pretreatment options for wastewater fed RED, enabling the improvement of the hybrid process of RED-RO seawater desalination.

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Section: Ref1supporting

confidence: 68%

Secondary treated domestic wastewater in reverse electrodialysis: What is the best pre-treatment?

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Vooren

Gutierrez

et al. 2019

Separation and Purification Technology

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“…These observations have been attributed to entropic effects, strong solvation layers, and thus unfavorable polar interactions (Butt et al, 2005;Gudipati et al, 2005;Tiraferri et al, 2012). On the other hand, hydrogen bonding is widely considered as an important foulant/membrane adsorption mechanism for material enriched in polysaccharides (Gutierrez et al, 2015;Yamamura et al, 2008).…”

Section: Influence Of C-aom Contentmentioning

confidence: 99%

Investigation of severe UF membrane fouling induced by three marine algal species

et al. 2016

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Reducing membrane fouling caused by seawater algal bloom is a challenge for regions of the world where most of their freshwater is produced by seawater desalination. This study aims to compare ultrafiltration (UF) fouling potential of three ubiquitous marine algal species cultures (i.e., Skeletonema costatum-SKC, Tetraselmis sp.-TET, and Hymenomonas sp.-HYM) sampled at different phases of growth. Results showed that flux reduction and irreversible fouling were more severe during the decline phase as compared to the exponential phase, for all species. SKC and TET were responsible for substantial irreversible fouling but their impact was significantly lower than HYM. The development of a transparent gel layer surrounding the cell during the HYM growth and accumulating in water is certainly responsible for the more severe observed fouling. Chemical backwash with a standard chlorine solution did not recover any membrane permeability. For TET and HYM, the Hydraulically Irreversible Fouling Index (HIFI) was correlated to their biopolymer content but this correlation is specific for each species. Solution pre-filtration through a 1.2 μm membrane proved that cells and particulate algal organic matter (p-AOM) considerably contribute to fouling, especially for HYM for which the HIFI was reduced by a factor of 82.3.

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“…The spring constant of the cantilevers were obtained by the Thermal Tuning method, while the deflection (V) was converted to force (nN) in accordance to Hooke's law [23]. The HMW SKC-IOM coating procedure of the AFM probe was conducted following the layer-by-layer procedure using iron oxide as an intermediate layer as described elsewhere [24][25][26][27][28]. Briefly, the AFM colloidal probe was immersed in a previously prepared iron oxide solution for 8 h (i.e., precipitation of iron oxide was performed by increasing the pH of a 10 mM FeCl3 solution to 7 by small additions of NaOH).…”

Section: Measurement Of Interaction Forces Between Hmw Skc-iom and Simentioning

confidence: 99%

Characterization of Skeletonema costatum intracellular organic matter and study of nanomechanical properties under different solution conditions

Gutierrez

Aubry²,

Dramas

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Highlights Models of polymer physics were applied to describe HMW SKC-IOM polymeric nature  HMW SKC-IOM polymeric structure showed highly responsive to solution chemistry  Two regions of different nanomechanical properties were observed in HMW SKC-IOM  HMW SKC-IOM showed fully extended chains at low ionic strength  HMW SKC-IOM evidenced compressed structures with increasing salt concentration AbstractIn the current investigation, a rigorous characterization of the high molecular weight (HMW) compounds of Skeletonema costatum (SKC) intracellular organic matter (IOM), including nanomechanical properties, was conducted. HMW SKC-IOM was characterized as a mixture of polysaccharides, proteins, and lipids. Atomic force microscopy (AFM) provided crucial information of this isolate at a nanoscale resolution. HMW SKC-IOM showed highly 3 responsive to solution chemistry: fully extended chains at low ionic strength, and compressing structures with increasing electrolyte concentration in solution. Interestingly, two regions of different nanomechanical properties were observed: a) Region #1: located farther from the substrate and showing extended polymeric chains, and b) Region #2: located <10 nm above the substrate and presenting compressed structures. The polymer length, polymer grafting density, and compressibility of these two regions were highly influenced by solution conditions. Results suggest that steric interactions originating from HMW SKC-IOM polymeric structure would be a dominant interacting mechanism with surfaces. The current investigation has successfully applied models of polymer physics to describe the complex HMW SKC-IOM structural conformation at different solution conditions. The detailed methodology presented provides a tool to characterize and understand biopolymers interactions with surfaces, including filtration membranes, and can be extended to other environmentally relevant organic compounds.

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Natural organic matter interactions with polyamide and polysulfone membranes: Formation of conditioning film

Cited by 29 publications

References 44 publications

Secondary treated domestic wastewater in reverse electrodialysis: What is the best pre-treatment?

Secondary treated domestic wastewater in reverse electrodialysis: What is the best pre-treatment?

Investigation of severe UF membrane fouling induced by three marine algal species

Characterization of Skeletonema costatum intracellular organic matter and study of nanomechanical properties under different solution conditions

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