Sepiolite modification method and application of modified sepiolite to wastewater treatment

A technology of wastewater treatment and sepiolite, which is applied to the modification of sepiolite, and the application field of modified sepiolite in wastewater treatment, which can solve problems such as unsuitable for industrial production, not in line with environmental protection, and reduce modification costs , to achieve the effect of less energy consumption, high adsorption rate and improved adsorption capacity

Active Publication Date: 2016-06-01
XIANGTAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent 201310273191.4 uses cetyltrimethylammonium bromide to modify sepiolite. Although the adsorption performance has been significantly improved, cetyltrimethylammonium bromide is an organic compound with high cost , and its use may cause new pollution during its preparation, so it is not suitable for industrial production
Chinese patent 201310262836.3 discloses a method for preparing an organically modified sepiolite adsorbent, using cellulose modified sepiolite, cellulose is cheap and easy to obtain, and the preparation method adopted in the present invention is very simple, thereby significantly reducing However, there are still deficiencies: the obtained modified sepiolite material only has a good adsorption effect on phenol in wastewater, but the adsorption capacity on heavy metals or other organic pollutants is not strong, so its application is still relatively limited. Large limitations, and the use of ammonium ferrous sulfate hexahydrate as a catalyst in the preparation process will also pollute the environment due to its toxicity and irritation, which does not meet the requirements of green environmental protection

Method used

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  • Sepiolite modification method and application of modified sepiolite to wastewater treatment
  • Sepiolite modification method and application of modified sepiolite to wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A modification method of sepiolite, comprising the steps of:

[0022] (1) adding 800ml concentration of 1.2mol / L hydrochloric acid solution to 100g sepiolite, controlling the temperature at 40°C, and processing for 4 hours to obtain acid-modified sepiolite;

[0023] (2) Add a solution made of 600g cellulose and 1.5mol ferric chloride to the above-mentioned acid-modified sepiolite, carry out hydrothermal reaction, the temperature is 200 ℃, and the time is 20 hours;

[0024] (3) Filtrate, wash, and then dry at 120° C. for 10 hours to obtain the modified sepiolite.

Embodiment 2

[0026] A modification method of sepiolite, comprising the steps of:

[0027] (1) Adding 600ml concentration of 2mol / L nitric acid solution to 100g sepiolite, controlling the temperature at 60°C, and processing for 6 hours to obtain acid-modified sepiolite;

[0028] (2) Add a solution made of 1500g cellulose and 2mol ferric chloride to the above-mentioned acid-modified sepiolite, carry out hydrothermal reaction, the temperature is 160 ℃, and the time is 30 hours;

[0029] (3) Filtrate, wash, and then dry at 120° C. for 10 hours to obtain the modified sepiolite.

Embodiment 3

[0031] A modification method of sepiolite, comprising the steps of:

[0032] (1) adding 1000ml concentration of 1.5mol / L hydrochloric acid solution to 100g sepiolite, controlling the temperature at 80°C, and processing for 5 hours to obtain acid-modified sepiolite;

[0033] (2) Add the solution that 1500g cellulose and 1.3mol ferric chloride and 0.7mol ferrous chloride are made into in above-mentioned acid-modified sepiolite, carry out hydrothermal reaction, temperature is 300 ℃, time is 20 hours;

[0034] (3) Filtrate, wash, and then dry at 120° C. for 10 hours to obtain the modified sepiolite.

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PUM

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Abstract

The invention discloses a sepiolite modification method and application of modified sepiolite to wastewater treatment. Cellulose and molysite are jointly adopted for modification of sepiolite, and the method particularly includes acid treatment of the sepiolite and joint hydrothermal reaction of acid-modified sepiolite, the cellulose and the molysite. The preparation method is quite simple, mild in preparation condition, low in related reaction temperature and low in energy consumption. The cellulose for modification is low in cost, the molysite can be combined with the sepiolite to improve adsorption effects and also plays a role in catalysis in a hydrothermal synthesis process to enhance catalysis effects, and utilization of toxic catalysts such as ammonium ferrous sulfate hexahydrate is avoided. The modified sepiolite prepared according to the method is excellent in performance and high in adsorption rate of heavy metals and organic pollutants such as phenol.

Description

technical field [0001] The invention relates to the fields of material preparation and environmental protection engineering, in particular to a method for modifying sepiolite and the application of modified sepiolite in wastewater treatment. Background technique [0002] Sepiolite is a kind of cheap inorganic adsorption material, but natural sepiolite ore grade is low, impurity content is high, it is directly used as adsorption material, the effect is not satisfactory. Therefore, there are many studies on the modification of sepiolite at present, and the modification of sepiolite mainly includes methods such as physical coating, acid-base activation, thermal activation, inorganic modification and organic modification. Some modification of sepiolite can enhance its adsorption capacity, and it is expected to improve its adsorption capacity by grafting certain organic compounds or combining it with metal elements, so that it can be used in wastewater treatment, sewage soil It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28C02F1/62C02F101/34
CPCB01J20/12B01J20/28009C02F1/281C02F2101/345
Inventor 郝芳张文斌刘平乐熊伟熊绍峰罗和安
Owner XIANGTAN UNIV
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