Polyelectrolyte-promoted forward osmosis process for dye wastewater treatment – Exploring the feasibility of using polyacrylamide as draw solute

Zhao, Pei; Gao, Baoyu; Kong, Jiaojiao; Ma, Defang; Shon, Ho Kyong; Liu, Pan

doi:10.1016/j.cej.2014.11.064

Cited by 77 publications

(34 citation statements)

References 26 publications

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“…There were many other draw solutes which had been studied by prior papers, such as polyglycol copolymers [16], inorganic salts [11], and highly water-soluble magnetic nanoparticles [17]. In our earlier study, hydrolyzed polyacrylamide (HPAM), as a group of water-soluble high-molecular polymer, had be proven to be a good candidate for draw solute due to its steadier water flux and less salt leakage [18]. The diluted DS solution needs not to be concentrated.…”

mentioning

confidence: 98%

Explore the forward osmosis performance using hydrolyzed polyacrylamide as draw solute for dye wastewater reclamation in the long-term process

Zhao

Gao

Yue

et al. 2015

Chemical Engineering Journal

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confidence: 98%

Explore the forward osmosis performance using hydrolyzed polyacrylamide as draw solute for dye wastewater reclamation in the long-term process

Zhao

Gao

Yue

et al. 2015

Chemical Engineering Journal

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“…2 displays a schematic drawing of the FO setup used in our studies, which is similar to that in previous studies. 33,37 The effective membrane area of the lab-scale membrane unit was 20.0 cm 2 (7.7 cm length, 2.6 cm width and 0.3 cm depth). The feed and draw solutions were circulated by two pumps and owed concurrently at different ow rates.…”

Section: Forward Osmosis Systemmentioning

confidence: 99%

“…Besides, there are many processes such as membrane distillation, ultraltration and nanoltration for regeneration of the PESA solution. 33,34 It is envisioned that this study may provide fundamentals for the development of novel draw solutions for the FO process.…”

Section: Introductionmentioning

confidence: 99%

Exploration of polyepoxysuccinic acid as a novel draw solution in the forward osmosis process

et al. 2017

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Polyepoxysuccinic acid (PESA) is a green corrosion scale inhibitor. When PESA is used for wastewater desalination in the forward osmosis (FO) process, the diluted PESA solution could be used for cooling systems. In our investigation, the effects of membrane orientation, temperature and flow rate on FO performance are studied using PESA as a draw solute. The results show that the effect of temperature on water flux is obvious, but the water flux increase is higher from 25 C to 35 C than that from 35 C to 45 C. Compared to the FO mode, the water flux increases faster in the pressure-retarded osmosis mode (PRO mode) at high flow rate due to the reduction of concentrative internal concentration polarization (CICP). Compared with polyaspartic acid (PASP) and NaCl, the water flux of PESA is the lowest under the same conditions. However, PESA has the lowest specific reverse solute flux (J s /J w ) at both membrane orientations. For example in the FO mode this value is 0.46 g L À1 , whereas that of NaCl and PASP is 1.12 and 0.74 g L À1, respectively. This means that PESA has lower loss to the feed side than NaCl and PASP in the FO process, which greatly reduces the replenishment cost of the draw solute. The use of PESA as the draw solute in the FO process to treat dyeing water has the advantages of stable water flux (within 20 min), high dye rejection (nearly 1) and reversible membrane fouling (restored to 97%). The nanofiltration (NF) process indicates the good performance of PESA recovery with a high specific water flux (0.94 LMH per bar) and rejection rate (97.8%). Thus, the overall performance of PESA demonstrates that it is a promising draw solute.

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“…A relative high initial flux of 9.7 LMH is observed, suggesting that STPH is a good candidate for seawater desalination by a FO process. This FO performance with the STPH draw solution was also benchmarked against most other reported draw solutes under comparable conditions, including dendrimers [18], hydroacid complexes [16,28], polyelectrolytes [29,30], responsive ionic liquid [31], and thermoresponsive copolymers [32,33]. Table 1 shows that the STPH draw solution exhibits superior FO performance to most of the other reported organic draw solutes.…”

Section: Forward Osmosis (Fo) Performancementioning

confidence: 97%

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

Long

Wang

2015

Energies

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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.

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Polyelectrolyte-promoted forward osmosis process for dye wastewater treatment – Exploring the feasibility of using polyacrylamide as draw solute

Cited by 77 publications

References 26 publications

Explore the forward osmosis performance using hydrolyzed polyacrylamide as draw solute for dye wastewater reclamation in the long-term process

Explore the forward osmosis performance using hydrolyzed polyacrylamide as draw solute for dye wastewater reclamation in the long-term process

Exploration of polyepoxysuccinic acid as a novel draw solution in the forward osmosis process

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

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