Composite polymer hydrogels as draw agents in forward osmosis and solar dewatering

Li, Dan; Zhang, Xinyi; Yao, Jianfeng; Zeng, Yu; Simon, George P.; Wang, Huanting

doi:10.1039/c1sm06043k

Cited by 152 publications

(125 citation statements)

References 41 publications

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“…In addition, draw solutes should be able to generate high osmotic pressures and be completely regenerated using simple, efficient techniques. Due to these numerous and sometimes conflicting requirements and the large number of potential solutes that could be used, draw solutes with strikingly different properties have been tested for FO [17][18][19][20][60][61][62][63][64]. It is clear that a focused and updated discussion of desired draw solute properties is needed.…”

Section: Is Finding a Magic Draw Solution The Holy Grail In Fo?mentioning

confidence: 98%

Forward osmosis: Where are we now?

et al. 2015

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Section: Is Finding a Magic Draw Solution The Holy Grail In Fo?mentioning

confidence: 98%

Forward osmosis: Where are we now?

et al. 2015

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“…Polymer hydrogels such as these have the capacity to pull water from the saline feed during swelling and after that release the water while deflating, the latter being caused by heating and hydraulic pressure. So as to enhance the capacity of swelling ratios and drawing water, a type of light-absorbing carbon particles was introduced into the polymer hydrogels, and as a consequence an improved performance was obtained [127]. A new draw solute separation system simulating the "destabilization" phenomenon was suggested for the process of generating drinking water [128].…”

Section: Draw Solute/solution Developmentsmentioning

confidence: 99%

Fouling in Forward Osmosis Membranes: Mechanisms, Control, and Challenges

Abdelrasoul¹,

Doan²,

Lohi³

et al. 2018

Osmotically Driven Membrane Processes - Approach, Development and Current Status

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Continuously escalating global water demand places a substantial burden on the available water and energy resources. Forward osmosis (FO) is an evolving membrane desalination technology that has recently raised interest as a promising low-energy process. FO is a unique method since it utilizes natural osmosis as the driving force, and hence, it ensures that the energy consumption is significantly reduced, in comparison to other pressuredriven membrane processes that are constrained by their excessive energy consumption and unsustainable cost. Therefore, the growing interest in FO from various disciplines and industrial sectors calls for a better understanding of the FO process and further advances in the FO technology management. This chapter aims to provide an in-depth assessment of the water transport phenomenon in FO membranes by focusing on the influence of internal concentration polarization, membrane structure/material, and membrane orientation on the permeate flux. This chapter offers critical insight that can lead to the potential development of new FO membranes with reduced internal concentration polarization and higher water permeability. In addition, key strategies for FO membrane development, some of its challenges, and the perspectives for future investigations of FO membrane fouling and effective FO fouling control methods are explored in this chapter.

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“…According to Li et al [45], at room temperature a pressure of 3MP can only recover 3.2% water from a PSA-NIPAM swollen hydrogel with 80% water content. To overcome the hydrogel dewatering energy demanding issue, thermo-responsive polymer hydrogel is introduced [45,46,77,78,80]. The thermo-responsive polymer hydrogel particles are placed on a semi-permeable membrane to provide osmotic pressure and only draw water molecules from a saline solution.…”

Section: Hydrogel-driven Forward Osmosis Processmentioning

confidence: 99%

Biodesalination—On harnessing the potential of nature’s desalination processes

et al. 2016

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Water scarcity is now one of the major global crises, which has affected many aspects of human health, industrial development and ecosystem stability. To overcome this issue, water desalination has been employed. It is a process to remove salt and other minerals from saline water, and it covers a variety of approaches from traditional distillation to the well-established reverse osmosis. Although current water desalination methods can effectively provide fresh water, they are becoming increasingly controversial due to their adverse environmental impacts including high energy intensity and highly concentrated brine waste. For millions of years, microorganisms, the masters of adaptation, have survived on Earth without the excessive use of energy and resources or compromising their ambient environment. This has encouraged scientists to study the possibility of using biological processes for seawater desalination and the field has been exponentially growing ever since. Here, the term biodesalination is offered to cover all of the techniques which have their roots in biology for producing fresh water from saline solution. In addition to reviewing and categorizing biodesalination processes for the first time, this review also reveals unexplored research areas in biodesalination having potential to be used in water treatment.

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Composite polymer hydrogels as draw agents in forward osmosis and solar dewatering

Cited by 152 publications

References 41 publications

Forward osmosis: Where are we now?

Forward osmosis: Where are we now?

Fouling in Forward Osmosis Membranes: Mechanisms, Control, and Challenges

Biodesalination—On harnessing the potential of nature’s desalination processes

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