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Sludge iron-supported multiphase photo-Fenton catalytic material and preparation method thereof

A catalytic material and sludge technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of high cost, and achieve the effect of reducing the addition amount, reducing cost and good stability

Active Publication Date: 2015-03-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the carriers of heterogeneous photo-Fenton reaction catalytic materials are mostly Nafion, molecular sieve and activated carbon, etc., and some of them still have the problem of high cost. Catalytic material and its preparation method

Method used

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  • Sludge iron-supported multiphase photo-Fenton catalytic material and preparation method thereof
  • Sludge iron-supported multiphase photo-Fenton catalytic material and preparation method thereof
  • Sludge iron-supported multiphase photo-Fenton catalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of digested sludge loaded iron heterogeneous photo-Fenton catalyst:

[0026] Put 10 g of digested sludge in 20 ml (NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2 O aqueous solution, magnetically stirred at room temperature for 3 h and then centrifuged. The obtained solid was dried and calcined at 350 °C for 5 h in an air atmosphere in a muffle furnace, and cooled to room temperature to obtain a digested sludge-supported iron heterogeneous photo-Fenton catalyst.

[0027] The effects of different types of iron precursors on the catalytic activity of the prepared heterogeneous photo-Fenton catalysts were studied. Keeping other conditions unchanged, the distribution uses 1 M FeSO 4 ·7H 2 O, (NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2 O, FeCl 3 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O was prepared as a catalyst for the iron precursor, and its photo-Fenton catalytic degradation efficiency for rhodamine B was tested, and the degradation rate of the pseudo-first-order reaction kinetics was as follo...

Embodiment 2

[0029] Preparation of digested sludge loaded iron heterogeneous photo-Fenton catalyst:

[0030] As in Example 1, the difference is that the calcination temperature in the muffle furnace ranges from 250-750°C. Test its photo-Fenton catalytic degradation efficiency of rhodamine B, pseudo-first-order reaction kinetics degradation rate as figure 1 It can be seen that the photo-Fenton catalyst prepared at 350 ℃ has the best catalytic effect.

Embodiment 3

[0032] Preparation of digested sludge loaded iron heterogeneous photo-Fenton catalyst:

[0033] As in Example 1, the difference is that the iron precursor FeSO 4 ·7H 2 O and (NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2The photo-Fenton catalytic degradation efficiency of rhodamine B by the prepared catalysts with O concentration ranging from 0-3 M, the pseudo-first-order reaction kinetics degradation rate as figure 2 As shown, the results of the corresponding iron content in the catalyst and the residual amount of iron ions in the solution after degradation are as follows image 3 shown. Combined with the results of the residual amount of iron ions in the solution after degradation, it can be known that 1 M (NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2 The photo-Fenton catalyst prepared by O aqueous solution is the best.

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Abstract

The invention belongs to the field of environmental catalytic materials and particularly relates to a sludge iron-supported multiphase photo-Fenton catalytic material and a preparation method thereof. The preparation method comprises following steps: (1) mixing sludge with an iron salt according to a certain proportion with drying to obtain a mixture; and (2) calcining the mixture in air at 350 DEG C for 3-5 hours so that iron oxides are supported onto a sludge supporter through a Si-O-Fe bond to form the porous-structural iron-supported multiphase photo-Fenton catalytic material consisting of Na, Mg, Al, Si, P, S, K, Ca, Ti, Cr, Mn, Ni, Cu and the like. In the catalytic material, by means of an advantage of the sludge as a natural supporter, not only is the sludge recycled but also various inorganic components and solid organic substances enriched in the sludge are fully utilized, so that the a photo-catalytic range of the sludge iron-supported multiphase photo-Fenton catalytic material is enlarged to a visible light and a catalytic activity of the catalytic material is significantly improved through comparison with a catalytic material not being supported onto the sludge. The preparation method is low in cost, is easy to carry out and is easy to popularize in large scales.

Description

technical field [0001] The invention belongs to the field of environmental catalytic materials, and relates to a sludge-loaded iron heterogeneous photo-Fenton catalytic material and a preparation method thereof. Background technique [0002] Since the "Twelfth Five-Year Plan", my country's sewage treatment capacity and treatment rate have grown rapidly, and the sewage treatment market has changed from facility construction to operation. With the improvement of the operation market, the sludge problem has followed. It is predicted that by 2015, the annual output of wet sludge (with a moisture content of 80%) in urban sewage treatment plants will reach 33.59 million tons. Traditional sludge treatment methods, such as landfill, open-air stacking and external transportation, can no longer meet the increasingly stringent sludge treatment and disposal standards. Therefore, the development of new possible sludge resource utilization methods has important environmental significance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19C02F1/30C02F1/72
CPCY02W10/37
Inventor 戴晓虎院士杰戴翎翎段妮娜董滨
Owner TONGJI UNIV
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