Highly Water-Soluble Magnetic Nanoparticles as Novel Draw Solutes in Forward Osmosis for Water Reuse

Ling, Ming Ming; Chung, Tai‐Shung; Chung, Tai‐Shung

doi:10.1021/ie100438x

Cited by 278 publications

(171 citation statements)

References 26 publications

Supporting

Mentioning

163

Contrasting

Unclassified

Order By: Relevance

“…The agglomeration phenomenon of MNPs under magnetic fields has been widely reported in the literature. [71,76] To mitigate the aggregation problem of MNPs in recovery via a magnetic field, alternative recycling methods, such as UF, NF, were also proposed to regenerate MNPs. [75,77] To synthesize hydrophilic MNPs under mild conditions, MNPs coated with hydroacids of oxalic acid (OA), citric acid (CA) and ethylenediaminetetraacetic acid (EDTA) were prepared via coprecipitation in a one-pot reaction (Figure 3).…”

Section: Magnetic Nanoparticles As Draw Solutesmentioning

confidence: 99%

Progress in Forward Osmosis Membrane Separation Process

Chen¹,

Xu²,

Ge³

2017

View full text Add to dashboard Cite

Forward osmosis (FO) has been extensively investigated and demonstrated its advantages in a range of FO applications over the past decade. However, challenges still remain in terms of the lack of both efficient FO membranes and appropriate draw solutes for practical FO applications. To promote the advancement of FO technology, considerable efforts have been made in exploring novel FO membranes and draw solutes in recent years. This paper will provide a short review on the progress of both FO membranes and draw solutes. First of all, a brief overview on FO principle is given. Then the progress in FO technology related to FO membrane and draw solute is presented with specific examples. Finally, challenges and future directions of FO technology in exploring efficient FO membranes and promising draw solutes are also highlighted. This article may provide new insights into the future development of FO technology and promote practical FO applications.Keywords forward osmosis, draw solution, forward osmosis membrane, forward osmosis application IntroductionFreshwater shortage has been becoming a more and more severe problem globally. [1][2][3][4] To mitigate this problem, various technologies for clean water production have been explored worldwide recently. [5][6][7][8][9] Membrane technology has shown a great potential in water treatment in view of the advantages of no phase change, strong adaptability, relatively simple operation and low cost. [5,[10][11][12] A range of pressure-driven membrane processes, such as microfiltration (MF), [13][14][15][16] ultrafiltration (UF), [13,17,18] nanofiltration (NF), [19][20][21] and reverse osmosis (RO) [22][23][24][25][26] have been extensively used for clean water production through either wastewater reuse or brackish water/ seawater desalination. However, some issues, such as severe membrane fouling, low water recovery rate, intensive-energy consumption and relatively low quality of product water, occur frequently during these processes. [10,13,17,23,27] FO has been recognized as a promising membrane process because of the following characteristics: (1) no requirement of hydraulic pressure; (2) a relatively high water recovery rate; (3) low membrane fouling propensity due to the absence of hydraulic pressure; (4) environmental friendliness. Given these merits, FO technology has been applied to a wide range of fields, such as seawater/brackish water desalination, [4,24,28] wastewater treatment, [8,[29][30][31] and many other areas. [32][33][34][35][36] Although FO exhibits a great potential in alleviating the issues caused by freshwater shortage, challenges, such as relatively low water permeability, high reverse solute diffusion, severe concentration polarization (CP), and membrane fouling, are still present in FO applications. [37][38][39] To eliminate these problems, exploration of appropriate semi-permeable FO membrane and draw solute is urgently needed. Great efforts have been made in the development of FO technology in recent years, and a wide range of powerful FO membra...

show abstract

Section: Magnetic Nanoparticles As Draw Solutesmentioning

confidence: 99%

Progress in Forward Osmosis Membrane Separation Process

Chen¹,

Xu²,

Ge³

2017

View full text Add to dashboard Cite

show abstract

“…In an FO process ( Figure 1.4), water moves across a semipermeable membrane from high water potential to low water potential, driven by an osmotic pressure gradient . Draw solutes such as NH3/CO2 and magnetic nanoparticles can avoid energy-intensive post-treatment processes like reverse osmosis (Ling et al 2010, McCutcheon et al 2005. Fertilizers can also be applied as draw solutes to eliminate the need for regeneration (Phuntsho et al 2011).…”

Section: Introduction To Forward Osmosismentioning

confidence: 99%

Resource recovery by osmotic bioelectrochemical systems towards sustainable wastewater treatment

Qin

2017

Environ. Sci.: Water Res. Technol.

View full text Add to dashboard Cite

(academic)Recovering valuable resources from wastewater will transform wastewater management from a treatment focused to sustainability focused strategy, and creates the need for new technology development. An innovative treatment concept -osmotic bioelectrochemical system (OsBES), which is based on cooperation between bioelectrochemical systems (BES) and forward osmosis (FO), has been introduced and studied in the past few years. An OsBES can accomplish simultaneous treatment of wastewater and recovery of resources such as nutrient, energy, and water (NEW). The cooperation can be accomplished in either an integrated (osmotic microbial fuel cells, OsMFC) or coupled (microbial electrolysis cell-forward osmosis system, MEC-FO) configuration.In OsMFC, higher current generation than regular microbial fuel cell (MFC) was observed, resulting from the lower resistance of FO membrane. The electricity generation in OsMFC could greatly inhibit the reverse salt flux. Besides, ammonium removal was successfully demonstrated in OsMFC, making OsMFCs a promising technology for "NEW recovery" (NEW: nutrient, energy and water). For the coupled OsBES, an MEC-FO system was developed. The MEC produced an ammonium bicarbonate draw solute via recovering ammonia from synthetic organic solution, which was then applied in the FO for extracting water from the MEC anode effluent. The system has been advanced with treating landfill leachate. A mathematical model developed for ammonia removal/recovery in BES quantitatively confirmed that the NH4 + ions serve as effective proton shuttles across cation exchange membrane (CEM). Resource Recovery by Osmotic Bioelectrochemical Systems towards Sustainable Wastewater TreatmentMohan Qin Abstract (general audience)Nowadays, wastewater is no longer considered as waste. Instead, it is a pool for different kinds of resources, such as nutrient, energy, and water (NEW). Various technologies were developed to achieve NEW recovery from wastewater. A novel concept, osmotic bioelectrochemical system (OsBES) has been introduced and studied in the past few years. OsBES is based on two technologies: bioelectrochemical systems (BES) and forward osmosis (FO); and the corporation between these two technologies could accomplish simultaneous wastewater treatment and resource recovery. We investigated two kinds of OsBES: one is osmotic microbial fuel cells (OsMFC), and the other is microbial electrolysis cell-forward osmosis system (MEC-FO). For OsMFC, a mathematical model was built to understand the internal resistance, which will affect the current generation according to Om's law (I=U/R). The salt transport across the cation exchange membrane (CEM) is related to the current generation. The ion transport, especially ammonium/ammonia transport, across CEM membrane in BES was modelled, which will help the BES design and operation for ammonia recovery systems. The system performance for wastewater treatment and resource recovery in MEC-FO was fully investigated with both synthetic wastewater and landfill leach...

show abstract

“…In recent years, various novel draw solutes with enhanced properties have been reported based on different design strategies, including magnetic nanoparticles with enhanced surface hydrophilicity or expanded molecular size [11][12][13], and organic compounds with improved volatility [14,15] or physicochemical properties [16], etc. Previous works have reported polyacrylic acid salts (PAA-Na) with various molecular weights ranging from 1200 Da to 5000 Da [17], and Polyamidoamine with terminal carboxyl groups (PAMAM-COONa) [18] as novel draw solutes with good FO performance.…”

Section: Introductionmentioning

confidence: 99%

Sodium Tetraethylenepentamine Heptaacetate as Novel Draw Solute for Forward Osmosis—Synthesis, Application and Recovery

Long

Wang

2015

Energies

View full text Add to dashboard Cite

Abstract:Osmotic energy, as a sustainable energy source with little environmental impact, has drawn much attention in both academia and industry in recent years. Osmotically driven membrane processes can harvest the osmotic energy and thus have great potential to produce sustainable clean water or electric energy. The draw solution, as an osmotic component, has been more and more explored by scientists in recent years in order to achieve a high osmotic pressure and suitable molecular size. In this work, a novel draw solute-sodium tetraethylenepentamine heptaacetate (STPH)-is synthesized and identified by nuclear magnetic resonance spectroscopy ( 1 H-NMR) and Fourier transform infrared (FTIR). Its solution properties are optimized in terms of the solution pH and concentration, and related to the forward osmosis (FO) performance. A water flux of 28.57 LMH and a low solute flux of 0.45 gMH can be generated with 0.5 g/mL STPH draw solution and de-ionized water (DI water) as the feed solution under pressure retarded osmosis (PRO) mode, which is superior to the FO performance with many other draw solutes reported. Further FO desalination test shows a stable water flux of 9.7 LMH with 0.3 g/mL STPH draw solution and 0.6 M NaCl feed solution. In addition, the draw solution recovery is also investigated.

show abstract

Highly Water-Soluble Magnetic Nanoparticles as Novel Draw Solutes in Forward Osmosis for Water Reuse

Cited by 278 publications

References 26 publications

Progress in Forward Osmosis Membrane Separation Process

Progress in Forward Osmosis Membrane Separation Process

Resource recovery by osmotic bioelectrochemical systems towards sustainable wastewater treatment

Sodium Tetraethylenepentamine Heptaacetate as Novel Draw Solute for Forward Osmosis—Synthesis, Application and Recovery

Contact Info

Product

Resources

About