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Preparation of magnetic cucurbituril and application of magnetic cucurbituril in removing HA (humic acid) pollutants from drinking source water

A technology of pollutants and melon rings, applied in the application field of humic acid pollutants, can solve the problems of difficult separation and low recovery rate, and achieve the effect of simple removal operation, short reaction time and good dispersion

Inactive Publication Date: 2012-08-01
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the melon ring is used as a flocculant for flocculation equilibrium, it is difficult to separate and the recovery rate is low

Method used

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  • Preparation of magnetic cucurbituril and application of magnetic cucurbituril in removing HA (humic acid) pollutants from drinking source water
  • Preparation of magnetic cucurbituril and application of magnetic cucurbituril in removing HA (humic acid) pollutants from drinking source water
  • Preparation of magnetic cucurbituril and application of magnetic cucurbituril in removing HA (humic acid) pollutants from drinking source water

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0033] Preparation of the cucurbit intermediate glycoside. Weigh 30g of urea, add 3.6mL of water and 6.1mL of hydrochloric acid, heat to 75°C, add 10.16mL of glyoxal dropwise after the urea is completely dissolved, and react at reflux for 2 hours at 75°C, a white precipitate is formed. After the solution was cooled naturally, the precipitate was washed with a large amount of deionized water several times, filtered under reduced pressure, and dried at 70°C for 6 hours before use.

[0034] Preparation of melon rings. Add 15.5g (0.109mol) of glycoside urea into the beaker, 8mol L -180ml of hydrochloric acid, add 7.0g (2.33mol) of paraformaldehyde after the glycoside urea is dissolved, and react at 95°C for 3h under stirring. Wash with acetone, and dry at 80°C for 8 hours to obtain melon rings.

[0035] Preparation of magnetic melon rings. After the prepared cucurbit is purified, take 1.5g cucurbit and dissolve it in 200ml deionized water, add (NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2 ...

preparation Embodiment 2

[0037] The preparation of cucurbit is the same as in Example 1. After the prepared cucurbit is purified, 2.5g cucurbit is taken and dissolved in 200ml deionized water, and added (NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2 O (1.7g, 4.33mmol) and NH 4 Fe(SO 4 ) 2 12H 2 O (2.51 g, 8.66 mmol) and sonicated for 20 min. Among them, melon ring: (NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2 O: NH4Fe(SO 4 ) 2 12H 2 The molar ratio of O is: 0.58:1:2. After the reaction device is sealed, 300r·min -1 Stir at a constant speed, and gradually raise the temperature to 50°C. After stirring for 5 minutes, add ammonia water dropwise to control the pH of the solution between 11 and 12. After adding ammonia water, the color of the solution changed from reddish brown to bright black rapidly, indicating that Fe 2+ , Fe 3+ The reaction produces magnetic Fe 3 o 4 , stop stirring after 30min, pour off the waste liquid after the solution has stood for a certain period of time, wash the product 4 times with deionized...

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Abstract

The invention discloses preparation of a magnetic cucurbituril and application of the magnetic cucurbituril in removing HA (humic acid) pollutants from drinking source water. The invention realizes synchronization of flocculation material preparation and a magnetism covering process. The preparation process is simple, and the magnetic cucurbituril has good dispersibility. Due to great relative gravity of a magnetic flocculating agent, the flocculation and precipitation time is greatly shortened. After flocculation balance, an external magnetic field can realize rapid magnetic separation, and the flocculating agent can be recovered effectively. When applying the flocculating agent in HA pollutants in drinking source water, the removal rate of the HA pollutants can reach over 98.2%, which is far higher than the removal rates of HA by products of the same kind. At the same time, the preparation method of the magnetic cucurbituril in the invention is characterized by simplicity and convenient operation, and the treatment effect is obvious. The flocculating agent can realize good magnetic separation and can be recycled.

Description

technical field [0001] The invention belongs to the technical scope of organic-inorganic composite materials and water treatment, and particularly relates to the application of using magnetic melon ring particles to treat slightly polluted water and humic acid pollutants in drinking water source water. technical background [0002] Humic acid (HA) widely exists in natural water environment, and the higher its content is, the worse the water quality will be. The organic substances in natural drinking water are mainly HA, and its concentration ranges from 20μg / L in groundwater to 30mg / L in surface water. The higher the content, the worse the water quality. The content of humic acid in general water sources is about 10mg / L, accounting for 50% to 90% of the total organic matter in water. The existence of humic acid in natural drinking water sources has brought a series of impacts on humans, animals and plants: drinking water Humic acid in the source is one of the environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F1/54
Inventor 杨琴杨永利李丹王文东江元汝葛曼李晓莉姜瑛陈双莉邢远清
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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