Separating membrane for filtering heavy metal ions as well as preparation method thereof

A heavy metal ion and separation membrane technology, applied in the field of separation membrane for filtering heavy metal ions and its preparation, can solve the problems of separation membrane reporting of heavy metal ions, achieve good acid resistance and chlorine resistance, and good interception effect

Inactive Publication Date: 2014-08-13
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no relevant reports on separation membranes for heavy metal ions in aqueous solutions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A separation membrane for filtering heavy metal ions, the separation membrane is composed of a non-woven fabric layer, a porous support layer coated on the non-woven fabric and a sodium alginate layer on the surface of the porous support layer; the porous support layer is composed of The film layer formed by mixing the cellulose acetate, the porogen and the solvent is calculated by weight percentage, and the ratio of the raw materials of each component is 10% of the cellulose acetate, 2% of the polyvinylpyrrolidone, and 88% of the solvent acetone.

[0029] The preparation method of the separation membrane for filtering heavy metal ions in the above-mentioned aqueous solution, it comprises the following steps:

[0030] (1) Preparation of casting solution: Weigh 50g of cellulose acetate, 10g of polyvinylpyrrolidone, and 440g of acetone, mix and prepare a 500g solution, stir at 70°C for 10 hours, fully and uniformly dissolve, and place in a vacuum at 25°C After degassing f...

Embodiment 2

[0036] A separation membrane for filtering heavy metal ions, the separation membrane is composed of a non-woven fabric layer, a porous support layer coated on the non-woven fabric and a sodium alginate layer on the surface of the porous support layer; the porous support layer is composed of The film layer formed by mixing the cellulose acetate, the porogen and the solvent is calculated by weight percentage, and the ratio of the raw materials of each component is 20% of the cellulose acetate, 10% of the polyethylene glycol, and 70% of the solvent acetone.

[0037] The preparation method of the separation membrane for filtering heavy metal ions in the above-mentioned aqueous solution, it comprises the following steps:

[0038] (1) Preparation of casting solution: Weigh 100g of cellulose acetate, 50g of polyethylene glycol, and 350g of acetone, mix and prepare a 500g solution, stir at 25°C for 4 hours, fully and evenly dissolve, and vacuum at 25°C After degassing in medium for 1 ...

Embodiment 3

[0044] A separation membrane for filtering heavy metal ions, the separation membrane is composed of a non-woven fabric layer, a porous support layer coated on the non-woven fabric and a sodium alginate layer on the surface of the porous support layer; the porous support layer is composed of The film layer formed by mixing cellulose acetate, porogen and solvent, by weight percentage, the ratio of the raw materials of its components is: cellulose acetate 20%, polyethylene glycol 5%, methanol 5%, acetone 50% , N-methylpyrrolidone is 20%.

[0045] The preparation method of the separation membrane for filtering heavy metal ions in the above-mentioned aqueous solution, it comprises the following steps:

[0046] (1) Preparation of casting solution: Weigh 100g of cellulose acetate, 25g of polyethylene glycol, 25g of methanol, 250g of acetone, and 100g of N-methylpyrrolidone, mix and prepare a 500g solution, stir at 50°C for 4 hours, fully After uniform dissolution, degassing in vacuu...

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PUM

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Abstract

The invention discloses a separating membrane for filtering heavy metal ions, wherein the separating membrane is composed of a non-woven cloth layer, a porous support layer and an algin layer on the surface of the porous support layer; the non-woven cloth layer is coated with the porous support layer, the porous support layer is a membrane layer formed by mixing cellulose acetate, a pore-foaming agent and a solvent. The separating membrane prepared by the method has a favorable interception performance to heavy metal ions (such as Cd(II), Cu (II) and Fe (III)) in a water solution, and can be applied to waste water treatment in the chemical engineering industry.

Description

technical field [0001] The invention relates to a separation membrane for filtering heavy metal ions and a preparation method thereof, belonging to the technical field of water treatment. Background technique [0002] Heavy metal elements are widely used in batteries, electroplating, dyes, optoelectronic components and atomic reactors. However, most heavy metals, such as cadmium, lead, and arsenic, are extremely harmful to human health and are listed as carcinogens. Studies have shown that long-term drinking of cadmium-contaminated water sources and consumption of cadmium-containing rice can cause kidney damage and lead to osteomalacia. The Environmental Statistics Annual Report of the Ministry of Environmental Protection of China announced that in 2010, the total amount of cadmium in the national wastewater discharge was 30.1 tons, the total amount of lead is 140.8 tons, and the total amount of arsenic is 118.1 tons. The cadmium pollution incident in Guangxi in January 20...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/16B01D71/06B01D69/12B01D69/10B01D67/00C02F1/44C02F1/62
Inventor 陈喆王志付秋明
Owner WUHAN INSTITUTE OF TECHNOLOGY
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