Xanthic acid-based attapulgite adsorbent as well as preparation method and application thereof

A technology based on attapulgite and xanthic acid, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, and can solve problems affecting performance, dyes that cannot be reused, and high production costs. Achieve the effects of easy operation, environmental protection and low cost

Inactive Publication Date: 2016-11-16
定西师范高等专科学校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, attapulgite contains a lot of impurities, which affect its performance, and it needs to be purified and modified to achieve better adsorption effect.
[0004] It has been reported in the literature that attapulgite is modified with cetyltrimethylammonium bromide (CTMAB) and used to treat printing and dyeing wastewater, and after mixing ferrous sulfate with attapulgite to treat printing and dyeing wastewater, Although it has reached a certain discharge standard, there are still high production costs, and the processed dye cannot be reused.

Method used

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  • Xanthic acid-based attapulgite adsorbent as well as preparation method and application thereof
  • Xanthic acid-based attapulgite adsorbent as well as preparation method and application thereof
  • Xanthic acid-based attapulgite adsorbent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add 20g of attapulgite to 120mL of distilled water, stir to disperse evenly, add 8g of NaOH, stir at 35°C for 1h, add CS dropwise 2 2.41mL, after reacting for 1h, add 5.0g soluble magnesium salt and 50mLH 2 O, continue to stir at a constant temperature of 35°C for 30min, filter with suction, wash with dilute magnesium salt solution (5-10%) for 3-5 times until the filtrate is colorless, and then wash with acetone for 3 times to obtain a light blue-green solid. After vacuum drying for 10 h, the XA1 product was obtained with a yield of 30.2 g.

Embodiment 2

[0046]Add 20g of attapulgite to 120mL of distilled water, stir to disperse evenly, add 8g of NaOH, stir at 35°C for 1h, add CS dropwise 2 7.23mL, after reacting for 1h, add 5.0g soluble magnesium salt and 50mLH 2 O, continue to stir at a constant temperature of 35°C for 30min, filter with suction, wash with dilute magnesium salt solution (5-10%) for 3-5 times until the filtrate is colorless, and then wash with acetone for 3 times to obtain a light blue-green solid. After vacuum drying for 10 h, the XA2 product was obtained with a yield of 29.2 g.

Embodiment 3

[0048] Add 20g of attapulgite to 120mL of distilled water, stir to disperse evenly, add 8g of NaOH, stir at 35°C for 1h, add CS dropwise 2 7.23mL, after reacting for 6h, add 5.0g soluble magnesium salt and 50mLH 2 O, continue to stir at a constant temperature of 35°C for 30min, filter with suction, wash with dilute magnesium salt solution (5-10%) for 3-5 times until the filtrate is colorless, and then wash with acetone for 3 times to obtain a light blue-green solid. After vacuum drying for 10 h, the XA3 product was obtained with a yield of 26.3 g.

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Abstract

The invention discloses a xanthic acid-based attapulgite adsorbent. The adsorbent is prepared from attapulgite, sodium hydroxide, carbon disulfide, soluble magnesium salt and deionized water. The invention also discloses a preparation method of the xanthic acid-based attapulgite adsorbent. The preparation method comprises the following steps: dispersing and alkalifying attapulgite, then subjecting attapulgite to reaction with carbon disulfide, then carrying out transformation by utilizing magnesium salt to generate a magnesium salt solution of xanthic acid-based attapulgite and finally carrying out washing and drying, thus obtaining the xanthic acid-based attapulgite adsorbent. The xanthic acid-based attapulgite adsorbent is used for removing dyes in wastewater. The xanthic acid-based attapulgite adsorbent provided by the invention has strong dye adsorption capacity, short adsorption time and high adsorption capacity. The preparation method is simple and practicable to operate and rapid and convenient to operate and has the advantages of high dye decolorization rate and easiness in solid-liquid separation after adsorption.

Description

technical field [0001] The invention relates to the technical field of water treatment, more specifically, the invention relates to a dye adsorbent-xanthate-based attapulgite adsorbent with high adsorption capacity for dyes in dye wastewater and a preparation method of the adsorbent. Background technique [0002] With the improvement of people's living standards, the application of dyes is becoming more and more extensive, involving textile, leather, printing, papermaking, plastics, rubber, pharmaceuticals, cosmetics and food industries. Dye wastewater has become one of the important pollution sources of the environment. It can directly or indirectly affect human health through the food chain. Therefore, the treatment of printing and dyeing wastewater has become a prominent environmental protection issue. [0003] Attapulgite is a clay mineral with very fine crystal grains. Its crystal structure belongs to a 2:1 layer chain transition structure. The theoretical chemical form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28
CPCB01J20/22C02F1/285C02F2101/308
Inventor 李芳蓉赵明刘凤霞王英童丹杨声
Owner 定西师范高等专科学校
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