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Functionalized polyvinyl alcohol adsorbent for managing heavy metal pollution in water and preparation method thereof

A polyvinyl alcohol, functionalized technology, applied in the direction of water pollutants, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems that have not been seen yet, achieve fast adsorption rate, good enrichment and recovery, and improve adsorption performance effect

Active Publication Date: 2013-06-12
广东省地质实验测试中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, there is no report on the treatment of heavy metal cadmium, lead, and nickel ions in flowing water by functionalized polyvinyl alcohol adsorbents.

Method used

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  • Functionalized polyvinyl alcohol adsorbent for managing heavy metal pollution in water and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this embodiment, a functionalized polyvinyl alcohol adsorbent for controlling heavy metal pollution in water bodies is a polyvinyl alcohol-maleic anhydride polymer prepared from polyvinyl alcohol, maleic anhydride, and butyl acetate, which is swollen and carbonized The polymer particle that obtains after processing, its preparation method is as follows:

[0036] (1) Weigh 40g of maleic anhydride and dissolve in 180g of butyl acetate, and react with 30g of polyvinyl alcohol in a flask at a temperature of 90°C for 6h, filter; pour the precipitate into 300mL of sodium hydroxide containing 3wt% In sodium hydroxide ethanol solution, react at 90°C for 3 minutes, filter; wash the precipitate with absolute ethanol and dry at 50°C to obtain polyvinyl alcohol-maleic anhydride polymer;

[0037] (2) Weigh 50 g of polyvinyl alcohol-maleic anhydride polymer, place in 150 g of dichloroethane and stir and swell for 15 h;

[0038] (3) Add 600 g of concentrated sulfuric acid to the s...

Embodiment 2

[0042] In this embodiment, a functionalized polyvinyl alcohol adsorbent for controlling heavy metal pollution in water bodies is a polyvinyl alcohol-maleic anhydride polymer prepared from polyvinyl alcohol, maleic anhydride, and butyl acetate, which is swollen and carbonized The polymer particle that obtains after processing, its preparation method differs from embodiment one in that:

[0043] The consumption of step (1) maleic anhydride is 60g.

[0044] The contents of hydroxyl group and carboxyl group in the obtained functionalized polyvinyl alcohol adsorbent were 0.6595mmol / g and 0.9590mmol / g, respectively.

Embodiment 3

[0046] In this embodiment, a functionalized polyvinyl alcohol adsorbent for controlling heavy metal pollution in water bodies is a polyvinyl alcohol-maleic anhydride polymer prepared from polyvinyl alcohol, maleic anhydride, and butyl acetate, which is swollen and carbonized The polymer particle that obtains after processing, its preparation method differs from embodiment one in that:

[0047] The consumption of step (1) maleic anhydride is 30g.

[0048] The contents of hydroxyl group and carboxyl group in the obtained functionalized polyvinyl alcohol adsorbent were 1.4790mmol / g and 0.4022mmol / g, respectively.

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Abstract

The invention discloses a functionalized polyvinyl alcohol adsorbent for managing heavy metal pollution in water. The functionalized polyvinyl alcohol adsorbent is a polymer granule which is prepared from a polyvinyl alcohol-maleic anhydride polymer in modes of swelling and carbonization treatment, wherein the polyvinyl alcohol-maleic anhydride polymer is prepared from polyvinyl alcohol, maleic anhydride and butyl acetate as raw materials. The invention further discloses a preparation method of the functionalized polyvinyl alcohol adsorbent. The absorbing material disclosed by the invention is large in heavy metal absorption capacity, rapid in absorption speed, wide in application range, free of secondary pollution, simple in use method, remarkable in effect, safe and reliable, simple and convenient in preparation process, high in production efficiency and good in product quality, can be recycled and reused and can be produced in large scale.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a functionalized polyvinyl alcohol adsorbent for treating heavy metal pollution in water and a preparation method thereof. Background technique [0002] The migration of heavy metals in the water environment determines their existing forms, enrichment status and potential ecological hazards in water bodies. Heavy metal ions are mechanically transported by water flow in the form of dissolved or granular, and this migration process obeys the principle of hydraulics. Heavy metals migrate and transform as simple ions, complex ions or soluble molecules in the environment through a series of physical and chemical actions (hydrolysis, oxidation, reduction, precipitation, dissolution, complexation, chelation, adsorption, etc.). In addition, heavy metals in water can undergo hydrolysis reactions to form hydroxides, and can also form sulfides or carbonates with corresponding anion...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
Inventor 赵秋香江海燕郑淑华冯超刘文华李锡坤
Owner 广东省地质实验测试中心
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