Characterisation and assessment of water treatment technologies for reuse

Koning, Jaap de; Bixio, D.; Karabelas, A.J.; Salgot, Miquel; Schäfer, Andrea

doi:10.1016/j.desal.2006.08.024

Cited by 66 publications

(22 citation statements)

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“…The targeted feed streams for the FO process include brackish water, seawater, treated wastewater effluent and industrial wastewater [20,26,27,66,67]. These are impaired water types composed dissolved substances or compounds that can induce membrane fouling and cause a severe decline in permeate flow [23,24,[68][69][70][71]. Therefore, the sustainability of membrane permeate flux during FO operation is hugely influenced by feed water composition (foulant type, concentration and physicochemical properties) as well as the feed solution chemistry (i.e.…”

Section: Feed Water Quality and Osmotic Gradientmentioning

confidence: 99%

Forward Osmosis as a Pre-Treatment Step for Seawater Dilution and Wastewater Reclamation

Motsa¹,

Mamba²

2018

Osmotically Driven Membrane Processes - Approach, Development and Current Status

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This chapter presents the exploration of the combined process of wastewater reclamation and seawater dilution using forward osmosis (FO). Wastewater and seawater are the two most abundant water sources that are free of the hydrological cycle and could serve as an alternative potable water source. Forward osmosis was chosen as the an ideal pre-treatment step to dilute seawater prior to desalination at relatively lower energy demand and low fouling propensity. Membrane fouling behavior was studied and investigated using different feed compositions bearing fractions of effluent organic matter (EfOM). The negative surface charge of all organic foulants was reduced by the adsorption of calcium ions. Filtration of feed streams containing single, simple organic foulants revealed that alginate (polysaccharides) and bovine serum albumin (BSA) resulted in significant loss in process performance as a result of permeate flux reduction.The complex mixture of alginate, BSA and humic acid caused severe loss in membrane performance due to dominant favorable synergistic interactions between foulants and between foulants and membrane surface. The forward osmosis process presents a viable alternative for a simple and effective seawater dilution step using wastewater as the feed solution. Process performance can be improved by selecting a foulant resistant membrane with matching flux.

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Section: Feed Water Quality and Osmotic Gradientmentioning

confidence: 99%

Forward Osmosis as a Pre-Treatment Step for Seawater Dilution and Wastewater Reclamation

Motsa¹,

Mamba²

2018

Osmotically Driven Membrane Processes - Approach, Development and Current Status

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“…The advanced oxidation processes (AOPs) are an excellent alternative. During AOPs, highly reactive oxidizing radicals are formed, mainly hydroxyl radicals (•OH) (Koning et al, 2008). These radicals are non-selective, promoting the oxidation of all organic and inorganic contaminants and, in the presence of a sufficient amount of oxidant and optimized reaction conditions, complete mineralization can be reached, the final products being CO 2 , H 2 O and inorganic anions.…”

Section: Tertiary and Advanced Treatment For Indirect Wastewater Reusementioning

confidence: 99%

Sustainability of Wastewater Treatment and Excess Sludge Handling Practices in the Federated States of Micronesia

2015

Water Treatment in Developed and Developing Nations

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“…Therefore, many resources are directed towards improving and developing water treatment technologies [1,2]. A large number of studies have aimed to develop new sorbents for pollutant removal [3–6], such as organically modified clay minerals, termed organoclays [7,8].…”

Section: Introductionmentioning

confidence: 99%

Designing a regenerable stimuli-responsive grafted polymer-clay sorbent for filtration of water pollutants

Gardi

Mishael

2018

Science and Technology of Advanced Materials

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A novel, stimuli-responsive composite, based on poly(4-vinylpyridine) (PVP) brushes, end-grafted to montmorillonite clay (GPC), was designed as a regenerable sorbent for efficient removal of pollutants from water. We characterized the novel composite sorbent and its response to pH, employing Fourier transform infrared, X-ray photoelectron spectroscopy, X-ray diffraction, thermogravimetry analysis and zeta potential measurements. In comparison with conventional, electrostatically adsorbed PVP composites (APC), the GPC presented superior characteristics: higher polymer loading without polymer release, higher zeta potential and lower pH/charge dependency. These superior characteristics explained the significantly higher removal of organic and inorganic anionic pollutants by this composite, in comparison with the removal by APC and by many reported sorbents. For example, the filtration (20 pore volumes) of selenate by GPC, APC and a commercial resin column was complete (100%), negligible (0%) and reached 90% removal, respectively. At low–moderate pH, the grafted polymer undergoes protonation, promoting pollutant adsorption, whereas at high pH, the polymer deprotonates, promoting pollutant desorption. Indeed, ‘in-column’ regeneration of the GPC sorbents was achieved by increasing pH, and upon a second filtration cycle, no reduction in filter capacity was observed. These findings suggest the possible applicability of this stimuli-responsive sorbent for water treatment.

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Characterisation and assessment of water treatment technologies for reuse

Cited by 66 publications

References 1 publication

Forward Osmosis as a Pre-Treatment Step for Seawater Dilution and Wastewater Reclamation

Forward Osmosis as a Pre-Treatment Step for Seawater Dilution and Wastewater Reclamation

Sustainability of Wastewater Treatment and Excess Sludge Handling Practices in the Federated States of Micronesia

Designing a regenerable stimuli-responsive grafted polymer-clay sorbent for filtration of water pollutants

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