Preparation of xanthated loess adsorbent and application of xanthated loess adsorbent to waste water treatment

A technology of xanthification and adsorbent, which is applied in the direction of adsorption of water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problem of low removal rate of heavy metal copper ion and malachite green, which cannot be used and other problems, to achieve the effect of being beneficial to environmental protection, causing secondary pollution, and large adsorption capacity

Inactive Publication Date: 2013-05-01
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these modified loess adsorbents cannot be used for the treatment of wastewater containing heavy metal copp...

Method used

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  • Preparation of xanthated loess adsorbent and application of xanthated loess adsorbent to waste water treatment
  • Preparation of xanthated loess adsorbent and application of xanthated loess adsorbent to waste water treatment
  • Preparation of xanthated loess adsorbent and application of xanthated loess adsorbent to waste water treatment

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Experimental program
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Embodiment 1

[0035] (1) Preparation of xanthated loess adsorbent

[0036] Disperse the loess in a 5% sodium hydroxide solution with a solid-to-liquid mass ratio of 1:1, and stir at a constant temperature of 35°C for 1 h to form a suspension; add 0.1 times the weight of loess to the system dropwise , and reacted at 35°C for 1 h to form sodium salt of xanthan acidified loess; prepared a solution with a mass fraction of 10% of magnesium sulfate twice the mass of loess, added it to the system, and continued to react at 35°C for 0.5 h to form Magnesium salt of xanthated loess; repeated washing and suction filtration with 10% magnesium sulfate solution by mass fraction until the filtrate was colorless, then washed with acetone, dried in vacuum, and ground into powder to obtain xanthated loess adsorbent (XLC ).

[0037] (2) Determination of adsorption performance

[0038] Adsorption experiment of heavy metal copper ions by xanthan acidified loess adsorbent: [Cu II ]: 100 mg / L, pH=4.7, the amou...

Embodiment 2

[0041] (1) Preparation of xanthated loess adsorbent

[0042] The loess was dispersed in a 30% sodium hydroxide solution with a solid-to-liquid mass ratio of 1:1, and stirred at a constant temperature at 10°C for 3 h to form a suspension; 0.3 times the amount of loess was added dropwise to the system. React at 10°C for 6 h to form sodium salt of xanthogenic acidified loess; prepare a solution with a mass fraction of 15% of magnesium sulfate that is three times the mass of loess, add it to the system, and continue to react at 45°C for 2 h to form yellow loess. Magnesium salt of ortho-acided loess; add 5% magnesium sulfate solution to wash repeatedly, filter with suction until the filtrate is colorless, then wash with acetone, dry in vacuum, grind into powder, and obtain xanthated loess adsorbent (XLC).

[0043] (2) Determination of adsorption performance:

[0044] Adsorption experiment of heavy metal copper ions by xanthan acidified loess adsorbent: [Cu II ]: 100 mg / L, pH=4.7,...

Embodiment 3

[0047] (1) Preparation of xanthated loess adsorbent

[0048] The loess was dispersed in a 10% sodium hydroxide solution with a solid-to-liquid mass ratio of 1:3, and stirred at a constant temperature at 45 °C for 1 h to form a suspension; 0.5 times the amount of loess was added dropwise to the system. React at 25°C for 0.5 h to form sodium salt of xanthogenic acidified loess; prepare a solution of 5% magnesium sulfate with 4 times the mass of loess, add it to the system, and continue to react at 10°C for 1 h to form yellow Magnesium salt of ortho-acided loess; add 10% magnesium sulfate solution to wash repeatedly, filter with suction until the filtrate is colorless, then wash with acetone, dry in vacuum, grind into powder, and obtain xanthated loess adsorbent (XLC).

[0049] (2) Determination of adsorption performance:

[0050] Adsorption experiment of heavy metal copper ions by xanthan acidified loess adsorbent: [Cu II ]: 100 mg / L, pH=4.7, the amount of adsorbent was 0.05 g...

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Abstract

The invention provides a preparation method of a xanthated loess adsorbent. The method comprises the following steps of: dispersing loess into a sodium hydrate solution to form a suspension; dropwise adding carbon bisulfide into a system, and stirring for reacting to generate a xanthated loess sodium salt; adding a soluble sodium salt into the system, and stirring for reacting to generate a xanthated loess magnesium salt; and washing, drying in vacuum, and grinding into powder to obtain the xanthated loess adsorbent. As proved by a large quantity of experiments, the xanthated loess adsorbent disclosed by the invention has a looser surface structure than that of natural loess, has a large specific surface area, has very high adsorption performance on heavy metal copper ions and malachite green in waste water, has a high adsorption capability and a large adsorption volume when applied to treatment of waste water containing heavy metal copper ions and a malachite green dye, and can be used for treating waste water containing the heavy metal copper ions and the malachite green dye.

Description

technical field [0001] The invention belongs to the technical field of polymer water treatment, and relates to the preparation of a xanthated loess adsorbent; the invention also relates to the application of the xanthated loess adsorbent in treating waste water containing heavy metal copper ions and malachite green dye. Background technique [0002] With the continuous development of the national economy, the discharge of industrial and agricultural wastewater and urban domestic sewage is gradually increasing, and water pollution is becoming more and more serious. Increasing water pollution has posed a major threat to human survival and has become a major obstacle to human health, economic and social sustainable development. [0003] Industrial wastewater mainly includes heavy metal wastewater and dye wastewater. Among them, heavy metals such as Pb, Cu, and Cd are toxic, non-biodegradable, and have enrichment properties. After entering the human body through the food chain, ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62C02F101/32
Inventor 王荣民李慧茹何玉凤宋鹏飞黄一君张立佳
Owner NORTHWEST NORMAL UNIVERSITY
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