Coal ash/magnetic straw composite material as well as preparation method and application thereof

A technology of composite materials and fly ash, which is applied in the field of fly ash/magnetic straw composite materials and its preparation, can solve the problems of poor adsorption efficiency and achieve the effects of reducing crystallinity, improving negative effects, and good adsorption and flocculation capabilities

Active Publication Date: 2018-01-30
FUJIAN MELTS SPRINGS DTC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the single fly ash adsorbent has problems such as poor adsorption efficiency in the process of treating water bodies.

Method used

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  • Coal ash/magnetic straw composite material as well as preparation method and application thereof
  • Coal ash/magnetic straw composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of fly ash / magnetic straw composite material, its preparation method comprises the following steps:

[0023] 1) Pretreatment of rapeseed stalks: wash the collected rapeseed stalks with water to remove surface dust, cut them into pieces, dry them, crush them with a pulverizer, soak them in an appropriate amount of water for 24 hours, filter to remove impurities, and obtain pretreated rapeseed Straw powder, spare;

[0024] 2) Modification of rape straw: Weigh 5 g of pretreated rape straw powder into a 250 mL three-neck flask, add 100 mL of 10 wt% sodium hydroxide solution, and stir in a water bath at 50 °C with electric stirring Stir at a constant temperature and at a constant speed for 24 hours until the rapeseed straw powder is completely melted, then place it to cool, then adjust its pH to neutral with 0.5 wt% hydrochloric acid solution, add an appropriate amount of absolute ethanol to make it precipitate, filter it with a vacuum pump, and place it again Dry in...

Embodiment 2

[0030] A kind of fly ash / magnetic straw composite material, its preparation method comprises the following steps:

[0031] 1) Pretreatment of rapeseed stalks: Wash the collected rapeseed stalks with water to remove surface dust, cut them into pieces, dry them, crush them with a grinder, soak them in an appropriate amount of water for 24 hours, filter to remove impurities, and obtain the pretreated Rapeseed straw powder, spare;

[0032] 2) Modification of rape straw: Weigh 5 g of pretreated rape straw powder into a 250 mL three-neck flask, add 100 mL of 15 wt% sodium hydroxide solution, and stir in a water bath at 55 °C with electric stirring Stir at a constant temperature and at a constant speed for 24 hours until the rapeseed straw powder is completely melted, then place it to cool, then adjust its pH to neutral with 1.0 wt% hydrochloric acid solution, add an appropriate amount of absolute ethanol to make it precipitate, filter it with a vacuum water pump, and place it again ...

Embodiment 3

[0038] A kind of fly ash / magnetic straw composite material, its preparation method comprises the following steps:

[0039] 1) Pretreatment of rapeseed stalks: Wash the collected rapeseed stalks with water to remove surface dust, cut them into pieces, dry them, crush them with a grinder, soak them in an appropriate amount of water for 24 hours, filter to remove impurities, and obtain the pretreated Rapeseed straw powder, spare;

[0040] 2) Modification of rape straw: Weigh 5 g of pretreated rape straw powder into a 250 mL three-neck flask, add 100 mL of 20 wt% sodium hydroxide solution, and place in a water bath at 60 °C with an electric stirrer Stir at constant temperature and constant speed for 24 h, let the rape straw powder melt completely and let it cool down, then adjust its pH to neutral with 1.5 wt% hydrochloric acid solution, add an appropriate amount of absolute ethanol to make it precipitate, filter it with a vacuum pump, and place it in Dry in an oven at 60°C for 2...

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Abstract

The invention discloses a coal ash / magnetic straw composite material as well as a preparation method and application thereof. The coal ash / magnetic straw composite material is prepared through a liquid-phase method by taking agricultural waste oilseed rape straw and industrial waste coal ash as raw materials. The raw materials adopted by the composite material are all wastes, so that an effect oftreating waste by waste is realized, furthermore, the composite material can be prepared under normal temperature and normal pressure, has the advantages of mild reaction condition, simple process andeasily controllable preparation process; meanwhile, the coal ash / magnetic straw composite material not only can play the advantages of straw / coal ash on water treatment, has good adsorption and flocculation effects on wastewater, but also has better magnetic separation effects and good adsorptive capability, is capable of obviously improve the phenomenon that the conventional straw / coal ash is difficult to separate in the water treatment process, solves the problem that suspended solids usually exist in the coal ash treated water, and is suitable for large-scale treatment of wastewater.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a fly ash / magnetic straw composite material and a preparation method and application thereof. Background technique [0002] Straw is a renewable resource in nature. It is rich in cellulose and lignin, and there are a large number of active groups such as hydroxyl groups on its molecular chain. The polluting substances have good flocculation and complex adsorption. As a kind of industrial solid waste, fly ash has good adsorption properties. In recent years, it has attracted widespread attention due to its promising application prospects in the adsorption and removal of pollutants. However, the single fly ash adsorbent has problems such as poor adsorption efficiency in the process of water treatment. [0003] Based on the excellent properties of straw and fly ash, the present invention prepares a magnetic straw / fly ash composite water treatment material, which has go...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/52C02F101/20
Inventor 李世迁陈自灿周晓艳陈盛林凡苏蒋珊珊
Owner FUJIAN MELTS SPRINGS DTC CO LTD
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