Membrane adsorbent for removing heavy metal ions from drinking water effectively and preparation method thereof

A technology for heavy metal ion and membrane adsorption, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve problems such as insufficient removal of heavy metal ions, and achieve good adsorption and retention performance and high water permeability , the effect of the simple method

Active Publication Date: 2011-02-02
安徽森诺膜技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem of insufficient existing methods for removing heavy metal ions, and to provide a membrane adsorbent for effectively removing heavy metal ions in drinking water and a preparation method thereof

Method used

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  • Membrane adsorbent for removing heavy metal ions from drinking water effectively and preparation method thereof
  • Membrane adsorbent for removing heavy metal ions from drinking water effectively and preparation method thereof
  • Membrane adsorbent for removing heavy metal ions from drinking water effectively and preparation method thereof

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preparation example Construction

[0034] The present invention has designed the preparation method of described membrane adsorbent simultaneously, and it comprises the steps:

[0035] 1. Preparation of film casting solution: according to the mass percentage requirements of the film adsorbent formula of the present invention, fully mix the various components described, stir at 40-50°C for 4-12 hours, and stand at room temperature for degassing After 5 to 24 hours, a uniformly mixed casting solution is obtained;

[0036] 2. Membrane production: Scrape and coat the prepared casting solution on a flat glass plate to form a flat film, and then soak it in a coagulation bath at 10-80°C for 12-72 hours to make the film solidify and form completely, ensuring that After the residual solvent and additives are removed, the membrane adsorbent with adsorption function can be prepared. The scraping method is manually scraped with a scraper. The thickness of the scraping film or the thickness of the film adsorbent should be...

Embodiment 1

[0045] The mass percentage formula design of the membrane adsorbent casting liquid is: 16wt% polyethersulfone [PES, produced by BASF]; 16wt% macroporous strongly acidic cation exchange resin powder [Nankai University chemical plant, model D061] (polyethersulfone / resin =50 / 50), with an average particle size of 10 μm; 16wt% polyethylene glycol (PEG); 4wt% polyvinylpyrrolidone (PVP) and 48wt% N,N dimethylacetamide (DMAc).

[0046] The process of manufacturing membrane adsorbent is: first add 8g resin to 24gDMAc and stir, after the dispersion is uniform, add 8gPEG and 2gPVP, after the solid is completely dissolved, add 8g PES several times to ensure that the ion exchange resin is dispersed in the polymer Evenly, after adding PES, stir the solution at 50°C for 5 hours; after the dissolution and dispersion are complete, let it stand for defoaming for 24 hours to prepare a casting solution; manually scrape the casting solution at a temperature of 50°C on a glass plate After forming a...

Embodiment 2

[0048] The mass percentage formula design of membrane adsorbent casting solution is: 16wt% polyethersulfone [BASF production]; 13wt% macroporous strongly acidic cation exchange resin powder [Nankai University chemical plant, model D061] (polyethersulfone / resin=55 / 45), with an average particle size of 10 μm; 16wt% ethylene glycol; 4wt% polyvinylpyrrolidone and 51wt% N,N dimethylformamide (DMF).

[0049] The process of manufacturing membrane adsorbent is as follows: first add 6.5g resin to 25.5gDMF and stir, after the dispersion is uniform, add 8gEG and 2gPVP, and after the solid is completely dissolved, add 8g PES several times to ensure that the ion exchange resin is in the polymer. After adding PES, the solution was stirred at 50°C for 5 hours; after the dissolution and dispersion were complete, it was left to defoam for 24 hours to prepare a casting solution; the casting solution at a temperature of 20°C was artificially placed on a glass plate After scraping to form a flat...

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Abstract

The invention relates to a membrane adsorbent for removing heavy metal ions and a preparation method thereof, in particular to a method for preparing a membrane adsorbent for removing heavy metal ions from water by utilizing the process of membrane filtration. Casting membrane liquid for preparing the membrane adsorbent comprises the following components in percentage by mass: 70 / 30 to 20 / 80 percent of polymer / resin, 4 to 30 percent of additive and 30 to 75 percent of solvent, wherein the concentration sum of the polymer and the resin is between 20 and 55 percent, and the sum of components is 100 percent. According to the formula of the invention, the method of the membrane adsorbent comprises the following steps of: 1, preparing the casting membrane liquid; 2, preparing a membrane; and 3, performing aftertreatment. The surface of the membrane adsorbent has an opening structure, so the membrane adsorbent has the excellent adsorption function, can be used as filtering and adsorbing media, and is particularly suitable for removing the heavy metal ions from the water.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a membrane adsorbent for removing heavy metal ions in water, in particular to a preparation method of a membrane adsorbent capable of removing heavy metal ions in water by using a membrane filtration process. Background technique [0002] Water is the source of life, and it plays an irreplaceable role in the existence and development of nature and human society. With the development of the global economy and society, the demand for water in human society is increasing rapidly. As a result, a large amount of untreated wastewater cannot be recycled, causing water environment pollution, seriously affecting the structure and function of aquatic ecosystems and the utilization of water resources, and causing water resource crises in many countries and regions in the world. [0003] In recent years, both abroad and at home, with the rapid development of industry, agriculture and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F101/20C02F1/44C02F1/62B01J20/30B01J20/26
Inventor 陈玉海郑贵堃李大维李然
Owner 安徽森诺膜技术有限公司
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