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Enhanced montmorillonite adsorbent and preparation method thereof

A technology of montmorillonite and adsorbent, which is applied in the field of enhanced montmorillonite adsorbent and its preparation, can solve the problems of poor adsorption effect of organic arsenic, and achieve the effects of low cost, low production cost and remarkable treatment efficiency

Inactive Publication Date: 2011-11-23
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the numerous arsenic removal technologies, Fe 3+ Adsorb As 5+ achieve the removal of inorganic arsenic, but Fe 3+ The adsorption effect on organic arsenic is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] 1. Sodium salt modified montmorillonite

[0019] Take 5g of anhydrous sodium carbonate and 200mL of deionized water in a 1L beaker and mix well, then add 400mL of deionized water and shake well, then add 100g of montmorillonite that has been weighed and shake well, and use an electromagnetic rotor at room temperature at 79HW - Stir in a constant temperature magnetic stirrer for 60 minutes, the speed is controlled at 40-50r / min, then put it in an oven at 70°C for 24 hours, take it out and centrifuge, centrifuge each sample 3 times, and take the centrifuged solid phase.

[0020] 2. Iron salt modified montmorillonite

[0021] Weigh FeCl 3 Prepare a 0.1mol / L solution, put it in an oven at 70°C and age it for 24 hours, take a 2L beaker and add the aged FeCl dropwise to the solid phase after centrifugation 3 Solution, use 0.1mol / L NaOH solution to adjust the pH of the mixed solution to 9.0, move it into a polytetrafluoroethylene reactor, heat it to 180°C in a microwave oven...

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PUM

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Abstract

The invention discloses an enhanced montmorillonite adsorbent and a preparation method thereof. The enhanced montmorillonite adsorbent is made by modifying montmorillonite with sodium salts, iron salts and microwave. The preparation method comprises the following steps of: firstly treating montmorillonite used as a raw material with a sodium carbonate solution with mass concentration of 8-10 g / L, then treating the montmorillonite with 0.1 mol / L FeCl3 solution, treating with microwave, and drying and calcining to obtain the enhanced iron-based montmorillonite. After being treated with the adsorbent disclosed by the invention, the waste water containing arsenic and inorganic arsenic has the arsenic content lower than 50 mcg / L. The purpose of environment-friendly treatment is achieved, the raw material can be obtained easily, the adsorbent can be prepared easily with low cost and has bright application prospect.

Description

1. Technical field [0001] The invention relates to the removal of organic arsenic and inorganic arsenic in farm wastewater, in particular to a strengthened montmorillonite adsorbent and a preparation method thereof. 2. Background technology [0002] Organic arsenic preparations have been used as feed additives in my country for nearly 20 years. Organic arsenic preparations have been widely used in pig and chicken industries. Sodium salt (asanic acid) and roxarsarsenic. Most of the organic arsenic preparations are excreted with feces in an undigested state, and also enter the surrounding environment with the excrement of livestock and poultry, resulting in the pollution of organic arsenic in the water and soil around the farm. "Journal of Ecology" 2006, volume 26, No. 1, pages 154-162, reported that the arsenic content in fish ponds around pig farms using organic arsenic additives generally exceeds the standard, and the arsenic content in the soil near the sewage outlet of pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28
Inventor 胡真虎李柯高军
Owner HEFEI UNIV OF TECH
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