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Preparation method of iron-supported attapulgite heterogeneous fenton catalyst

A technology of heterogeneous Fenton and attapulgite, which is used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. effect of benefit

Inactive Publication Date: 2014-06-25
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the common homogeneous Fenton system, because it can only be carried out effectively at a low pH, it is necessary to repeatedly adjust the pH value of the wastewater, which will increase the treatment cost, and the catalyst of the homogeneous Fenton system is miscible in wastewater In the process, a large amount of iron-containing sludge will be produced after the reaction, and the post-treatment is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A, get attapulgite to pulverize, pass 5 orders after pulverizing;

[0016] B, get an appropriate amount of attapulgite that has been screened and soak it in a hydrochloric acid solution of 6mol / L that is 10 times the quality of attapulgite; stir evenly at a stirring speed of 80r / min to obtain a sample;

[0017] C. Centrifuge the sample of step B at a speed of 1500 r / min for 10 min. After the centrifugation of the centrifuge, the supernatant suspension is filtered; Drying for 2 hours under the condition to obtain the modified attapulgite;

[0018] D, the attapulgite obtained in step C is ground through a 100 mesh sieve;

[0019] E. Use FeCl with a concentration of 1 mol / L 3 solution, by FeCl 3 Solution: the attapulgite is 5:1, and the attapulgite obtained in step D is soaked in a water bath for 6 hours;

[0020] F, the attapulgite obtained in step E is centrifuged at a speed of 1500 r / min for 10 min, or filtered with fast filter paper, dried at 103 ° C for 2 h, and g...

Embodiment 2

[0023] A, get attapulgite to pulverize, pass 15 orders after pulverizing;

[0024] B, get an appropriate amount of attapulgite that has been screened and soak it in a hydrochloric acid solution that is 15 times the quality of attapulgite and be 2mol / L in hydrochloric acid solution; stir evenly, and the stirring speed is 60r / min to obtain a sample;

[0025] C, centrifuge the sample of step B for 35min, the rotating speed of the centrifuge is 1600r / min, after centrifugation, the supernatant suspension is filtered; or directly filter without centrifugation, fast filter paper can be used, and the filtered sample is placed under the condition of 105°C Dry for 2.5 hours to obtain modified attapulgite;

[0026] D, the attapulgite obtained in step C is ground through a 200-mesh sieve;

[0027] E. Use FeCl with a concentration of 2 mol / L 3 solution, by FeCl 3 Solution: the ratio of attapulgite to 20:1, soak the attapulgite obtained in step D in a water bath for 24 hours;

[0028] F...

Embodiment 3

[0031] A, get attapulgite to pulverize, pass 20 orders after pulverizing;

[0032] B, get an appropriate amount of attapulgite that has been screened and soak it in a hydrochloric acid solution that is 20 times the quality of attapulgite and be 10mol / L in hydrochloric acid solution; stir evenly, and the stirring speed is 300r / min to obtain a sample;

[0033] C, centrifuge the sample of step B for 60min, the rotating speed of the centrifuge is 1800 r / min, after centrifugation, the supernatant suspension is filtered; or directly filter without centrifugation, fast filter paper can be used, and the filtered sample is kept at 105°C Under drying for 2.5h, the modified attapulgite is obtained;

[0034] D, the attapulgite obtained in step C is ground through a 40 mesh sieve;

[0035] E. Use FeCl with a concentration of 0.5 mol / L 3 solution, by FeCl 3 Solution: attapulgite at a ratio of 10:1, soak the attapulgite obtained in step D in a water bath for 12 hours;

[0036] F, the att...

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Abstract

The invention discloses a preparation method of an iron-supported attapulgite heterogeneous fenton catalyst. The method comprises the process steps that A, attapulgite is taken and crushed; B, a right amount of attapulgite is immersed in an acid solution, and uniformly stirred to form a sample; C, the sample is centrifuged; an upper layer suspension is filter and dried; modified attapulgite is obtained; D, the attapulgite is ground and sieved; E, an FeCl3 solution with the concentration of 0.5-2mol / L is adopted; the attapulgite is immersed for 6-24h in a water bath; and F, the attapulgite is centrifuged or filtered, and dried and ground to the original particle size; and a finished product is prepared. The method has the advantages that iron ions are supported to the modified attapulgite through immersion and ion exchange, and the heterogeneous fenton catalyst is prepared, so that nondegradable waste water can be treated efficiently, and the problems that a pH value in homogeneous fenton is low, iron mud can be generated, and secondary pollution is caused are solved. An adsorptive property, an ion exchange property, and a strong oxidizing property of fenton reaction are exerted in waste water treatment.

Description

technical field [0001] The invention relates to a preparation method of an iron-loaded nonmetallic ore heterogeneous Fenton catalyst, in particular to a preparation method of an iron-loaded attapulgite heterogeneous Fenton catalyst. Background technique [0002] The sources of refractory organic matter in water are very extensive, and their treatment has always been a difficult problem in the field of water treatment. The advanced oxidation technology is considered to be the most promising method for treating refractory organic matter in water because of its strong oxidation ability and no secondary pollution. Among the advanced oxidation treatment technologies, the Fenton technology has the characteristics of high treatment efficiency, relatively low cost, and easy industrialization, and has gradually become one of the main methods in the current advanced oxidation technology. In the past ten years, many foreign scholars have gradually shifted Fenton technology from labora...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J37/02B01J37/30C02F1/72C02F1/28C02F1/42
Inventor 周培国张楠胡媛孙盼华张文妍吴光前肖天岩李一新方艳
Owner NANJING FORESTRY UNIV
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