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A method for applying electrosensitive gel to forward osmosis process as an extraction material
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An electrosensitive gel and forward osmosis technology, applied in the field of environmental engineering, to achieve the effect of simple and fast separation process, improve performance and promote wider application
Inactive Publication Date: 2015-10-14
DALIAN UNIV OF TECH
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Abstract
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Problems solved by technology
Using hyaluronic acid / polyvinyl alcohol hydrogel as the absorption material of the forward osmosis process effectively solves the problems of reverse salt flux and concentration polarization within the dilution in the traditional forward osmosis process, and simplifies the absorption material Separation process from water, which improves the performance of the forward osmosis process
Method used
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Embodiment 1
[0015] Step 1. Mix a certain mass fraction of hyaluronic acid solution and polyvinyl alcohol solution and stir vigorously, and the mass fraction of hyaluronic acid and polyvinyl alcohol in the resulting mixed solution is 1%;
[0016] Step 2. Treat the mixed solution obtained in step 1 by freeze-thaw method to obtain hyaluronic acid / polyvinyl alcohol hydrogel, and the freeze-thaw times are 3, 5, 7, and 9 times respectively;
[0017] Step 3. Use deionized water as the feed liquid at both ends of the forward osmosis membrane, and use the hyaluronic acid / polyvinyl alcohol hydrogel obtained in step 2 as the absorption material of the forward osmosis process, and the forward osmosis process lasts for 24 hours.
[0018] The feed liquid enters the forward osmosis membrane module through a peristaltic pump, and the speed of the peristaltic pump is 160rpm; the support layer of the forward osmosis membrane faces the hydrogel; the water flux in the forward osmosis process is measured by th...
Embodiment 2
[0021] Step 1. Mix a certain mass fraction of hyaluronic acid solution and polyvinyl alcohol solution and stir vigorously, and the mass fraction of hyaluronic acid and polyvinyl alcohol in the resulting mixed solution is 1%;
[0022] Step 2. Treat the mixed solution obtained in step 1 by freeze-thaw method to obtain hyaluronic acid / polyvinyl alcohol hydrogel, and the number of freeze-thaw times is 5 times;
[0023] Step 3. Use deionized water as the feed liquid at both ends of the forward osmosis membrane, and use the hyaluronic acid / polyvinyl alcohol hydrogel obtained in step 2 as the extraction material of the forward osmosis process. An additional electric field is added to the components, and the voltages are 3, 6, 9v.
[0024] The feed liquid enters the forward osmosis membrane module through a peristaltic pump, and the speed of the peristaltic pump is 160rpm; the support layer of the forward osmosis membrane faces the hydrogel; the water flux in the forward osmosis proce...
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Abstract
The invention relates a method utilizing electrosensitive gel as an absorption material in a forward osmosis technology and belongs to the field of environmental engineering. The method utilizes hyaluronic acid / polyvinyl alcohol hydrogel as an absorption material used in the forward osmosis technology. According to the method, through a freeze thaw method, polyvinyl alcohol and hyaluronic acid are crosslinked so that electrosensitive hyaluronic acid / polyvinyl alcohol hydrogel is obtained, and the electrosensitive hyaluronic acid / polyvinyl alcohol hydrogel is used as the absorption material in the forward osmosis technology. The method utilizes an additional electric field in forward osmosis to promote hydrogel deswelling so that an osmotic pressure difference of two ends of a film is improved and forward osmosis water flux is finally improved. The electrosensitive hyaluronic acid / polyvinyl alcohol hydrogel as the absorption material solves the problems of counter salt flux and dilute internal concentration difference polarization, the separation between the absorption material and pure water is simplified, and wide application of a forward osmosis film separation technology is promoted.
Description
technical field [0001] The invention belongs to the field of environmental engineering, and relates to a method for applying an electrosensitive gel as an extraction material to a forward osmosis process. Background technique [0002] Water is one of the ubiquitous substances in nature, without water there is no life. Water is an indispensable material for human survival and development, a basic natural resource and a strategic economic resource, and an important part of the human environment. Therefore, the deteriorating water environment and the shortage of water resources have become global issues of concern to the world. Protecting water resources is a top priority for our country. Directly recycling sewage and obtaining pure water is a solution to the shortage of water resources. Due to the advantages of normal temperature operation, no phase change, good selectivity, and low energy consumption, membrane separation technology has been widely used in various fields fo...
Claims
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Application Information
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