Method for treating high-concentration industrial organic waste water and relevant catalyst

A technology of organic wastewater and treatment methods, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of unavailable practical references and low catalytic efficiency, etc. Achieve the effects of being suitable for large-scale promotion and application, easy to operate, and saving consumption

Inactive Publication Date: 2010-07-14
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the photocatalytic Fenton method and the electro-Fenton method are derived from the homogeneous Fenton method, they all have serious defects such as lo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] With Fe(NO 3 ) 3 9H 2 O is Fe 3+ Source, KAl(SO 4 ) 2 12H 2 O is Al 3+ source. Fixed Fe 3+ / Al 3+ Fe(NO 3 ) 3 9H 2 O and KAl(SO 4 ) 2 12H 2 O was stirred and dissolved in water at 65°C, and NaOH with a concentration of 1M was added dropwise to make OH - / Al 3+ +Fe 3+ A suspension was obtained after the molar ratio was 2. The above suspension was mixed with the suspension containing 3wt.% montmorillonite (0.3nm interlayer spacing of sheet structure) at 30°C for 1h and then aged at room temperature for 24h. The mixed suspension was filtered, washed, dried at 80°C for 12 hours, and calcined at 500°C for 2 hours to obtain the catalyst. The BET specific surface of the catalyst is 250g / m 2 , Fe content is 4.83wt.%, aluminum content is 11.45wt.%. The active component is Fe / Al composite oxide, loaded on the surface layer of montmorillonite sheet structure.

[0029] The catalyst (6.0 g / L concentration) was introduced into 1 g / L phenol solution (initial COD ...

Embodiment 2

[0032] With Fe(NO 3 ) 3 for Fe 3+ Source, KAl(SO 4 ) 2 for Al 3+ source. Fixed Fe 3+ / Al 3+ Fe(NO 3 ) 3 9H 2 O and KAl(SO 4 ) 2 12H 2O was stirred and dissolved in water at 65°C, and NaOH with a concentration of 1M was added dropwise to make OH- / Al 3+ +Fe 3+ A suspension was obtained after the molar ratio was 2. The above suspension was mixed with the suspension containing 3wt.% montmorillonite (layer spacing of sheet structure: 1.2nm) at 30°C for 1 hour, and then aged at room temperature for 24 hours. The mixed suspension was filtered, washed, dried at 80°C for 12 hours, and calcined at 500°C for 2 hours to obtain the catalyst. The specific surface of the catalyst is 220g / m 2 , Fe content is 6.43wt.%, aluminum content is 15.78wt.%. The active component is Fe / Al composite oxide, which enters the middle of the sheet-like structure of montmorillonite, and the catalyst has a columnar support structure.

[0033] The catalyst (9.0 g / L concentration) was introduce...

Embodiment 3

[0036] with FeCl 3 for Fe 3+ source to AlCl 3 for Al 3+ source. Fixed Fe 3+ / Al 3+ The molar ratio is 1 / 4, the FeCl 3 with AlCl 3 Mix at 65°C, then add 1M NaOH dropwise to make OH - / Fe 3+ +Al 3+ The molar ratio was 2, and a suspension was obtained. The suspension was mixed with 3 wt.% montmorillonite (1.4nm interlayer spacing of sheet-like structure) suspension, and stirred at 30° C. for 1 h at high speed. Continue to ripen at room temperature for 24h. The mixed suspension was filtered, washed, dried at 80°C for 12 hours, and calcined at 500°C for 2 hours to obtain the catalyst. The specific surface area of ​​the catalyst is 290m 2 / g, the Fe content is 8.32wt.%, and the aluminum content is 20.85wt.%. The active component is Fe / Al composite oxide, which enters the middle of the sheet-like structure of montmorillonite, and the catalyst has a columnar support structure.

[0037] The catalyst (concentration: 4.0g / L) was introduced into 1.0g / L nitrobenzene solution ...

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Abstract

The invention relates to a method for treating high-concentration industrial organic waste water. In the method, on the basis of a heterogeneous catalysis Fenton oxidizing reaction principle, a catalyst activity phase is a Fe/Al compound oxide; the waste water treatment temperature is 30-80 DEG C, and the pH value is 3-4.5; and hydrogen peroxide is used as a catalyst and optimally added at different time. The invention also relates to a load type Fe/Al compound oxide catalyst for a heterogeneous catalysis Fenton method. The invention can efficiently remove harmful components in high-concentration industrial organic waste water and obviously reduce the COD (chemical oxygen demand) value of the waste water to an acceptable level of a biochemical treatment pond, has simple and convenient operation, economy and practicability, and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of organic wastewater treatment, in particular to the technical field of high-concentration industrial organic wastewater treatment, and specifically refers to a method and related catalysts for treating high-concentration industrial organic wastewater (COD value greater than 2000 mg / L). Background technique [0002] The most economical method to treat industrial wastewater is microbial treatment, but this method is no longer applicable when the wastewater contains high concentrations of organic substances such as phenol and aniline. The current industrial practice is to mix industrial wastewater with a large amount of domestic sewage, reduce the COD value of the mixed wastewater to about 200mg / L, and then discharge it into the biochemical treatment pool. processing capacity and land cost. [0003] From the perspective of sustainable development, the treatment of high-concentration industrial organic wastew...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J23/745
Inventor 袁佩青李晓科
Owner EAST CHINA UNIV OF SCI & TECH
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