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Preparation method and applications of magnetically modified loess adsorbent

An adsorbent, loess technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of failing to meet the adsorption requirements of wastewater treatment, the adsorption performance of adsorbents and other problems, and achieve cation exchange performance. Excellent, improved adsorption performance, good adsorption effect

Inactive Publication Date: 2018-04-10
BAOJI UNIV OF ARTS & SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no method for magnetically modifying loess to obtain adsorbents has been reported yet.
[0008] Although the inventor has reported the method of combining magnetic carrier technology with bentonite in the early stage, the patent CN106975443A discloses that FeCl 3 ·6H 2 O, ethylene glycol, sodium acetate and citric acid were reacted to obtain a suspension, which was then reacted with heat-activated and acid-activated bentonite to obtain a magnetically modified bentonite adsorbent. However, it was found through experiments that when preparing the suspension, when the modified When the soil type is northern Shaanxi loess, the adsorption performance of the final adsorbent is significantly reduced, which cannot meet the adsorption requirements for wastewater treatment

Method used

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  • Preparation method and applications of magnetically modified loess adsorbent
  • Preparation method and applications of magnetically modified loess adsorbent
  • Preparation method and applications of magnetically modified loess adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Preparation of Magnetically Modified Shaanxi Loess Adsorbent

[0037] Weigh 4.5g of FeCl 3 ·6H 2 O, the KOH of 1.75g ​​is dissolved in the ethylene glycol of 100mL, and constant stirring speed is 300 revs / min, stirs 5h, obtains yellow-brown suspension; The temperature is 350°C, the time is 1.5h), acid activation (activate it with hydrochloric acid with a concentration of 3wt%, the liquid-solid mass ratio of hydrochloric acid and heat-activated loess in northern Shaanxi is 15:1, and at 100°C Control the stirring speed to 400 revs / min, the northern Shaanxi loess 1.349g after the stirring time is 8h), continue to control the stirring speed, mix and stir for 3h, and obtain the suspension; the above suspension is encapsulated in a polytetrafluoroethylene reactor, React at 200°C for 8 hours; take the black solid and wash it 3 times with water and ethanol, magnetically separate, dry, and grind to obtain magnetically modified Shaanxi loess.

[0038] 2. Phase composition, ...

Embodiment 2 36

[0072] 1. Preparation of Magnetically Modified Shaanxi Loess Adsorbent

[0073] Weigh 5.2g of FeCl 3 ·6H 2 O, the KOH of 1.92g is dissolved in the ethylene glycol of 130mL, and constant stirring speed is 300 revs / min, stirs 6h, obtains yellow-brown suspension; The temperature is 350°C, the time is 1.5h), acid activation (activate it with hydrochloric acid with a concentration of 3wt%, the liquid-solid mass ratio of hydrochloric acid and heat-activated loess in northern Shaanxi is 15:1, and at 100°C Control the stirring speed to 400 revs / min, the northern Shaanxi loess 1.349g after the stirring time is 8h), continue to control the stirring speed, mix and stir for 3h, and obtain the suspension; the above suspension is encapsulated in a polytetrafluoroethylene reactor, React at 180°C for 9 hours; take the black solid and wash it 3 times with water and ethanol, magnetically separate, dry, and grind to obtain magnetically modified Shaanxi loess.

[0074] 2. Determination of adso...

Embodiment 3

[0078] 1. Preparation of Magnetically Modified Shaanxi Loess Adsorbent

[0079] Weigh 5.9g of FeCl 3 ·6H 2O, the KOH of 2.45g is dissolved in the ethylene glycol of 150mL, and constant stirring speed is 350 revs / min, stirs 5h, obtains yellow-brown suspension; The temperature is 350°C, the time is 1.5h), acid activation (activate it with hydrochloric acid with a concentration of 3wt%, the liquid-solid mass ratio of hydrochloric acid and heat-activated loess in northern Shaanxi is 15:1, and at 100°C Control the stirring speed to 400 revs / min, the northern Shaanxi loess 1.349g after the stirring time is 8h), continue to control the stirring speed, mix and stir for 3h, and obtain the suspension; the above suspension is encapsulated in a polytetrafluoroethylene reactor, React at 160°C for 10 hours; take the black solid and wash it 3 times with water and ethanol, magnetically separate, dry, and grind to obtain magnetically modified Shaanxi loess.

[0080] 2. Determination of adso...

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PUM

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Abstract

The invention provides a preparation method and applications of a magnetically modified loess adsorbent. According to the preparation method, a soluble ferric salt is mixed with an alkali, and solvothermal method is adopted for synthesis so as to obtain nanometer magnetic Fe3O4; and the obtained nanometer magnetic Fe3O4 and activated loess are mixed and then are reacted at sealed conditions at 150to 200 DEG C so as to obtain the magnetically modified loess adsorbent. The removing rate of the magnetically modified loess adsorbent on methylene blue is 90% or higher; after adsorption, separationfrom water body is convenient to realize because of the magnetic properties. The raw materials are easily available and cheap; the preparation method is simple; cost is low; and the preparation method is beneficial for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic adsorption materials, and in particular relates to a method for preparing an adsorbent using loess as a raw material and an application thereof. Background technique [0002] With the acceleration of urbanization and industrialization in China, the problem of water treatment is becoming more and more serious, and the dye wastewater produced in the textile industry is a common and cannot be ignored pollution problem. Most of the dyes are composed of harmful chemical substances (such as benzidine and metals, etc.), which have potential hazards of carcinogenicity and mutagenesis, and seriously threaten human life safety and health. [0003] The methods currently used for dye wastewater treatment include precipitation, membrane separation, ion exchange, reverse osmosis, microbial degradation, and photocatalytic degradation, etc. (Water Research 95 (2016) 59-89). Among them, adsorptio...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30C02F1/28C02F101/30C02F101/36C02F101/38
CPCB01J20/06B01J20/103B01J20/28009C02F1/281C02F2101/308C02F2101/36C02F2101/38C02F2101/40
Inventor 王艳张喜娜王淑一赵微微胡登卫赵卫星
Owner BAOJI UNIV OF ARTS & SCI
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