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Application and preparation method of nanometer Fe(0)-porous sludge carbon material

A sludge carbon and nano-technology, which is applied in the fields of waste resource utilization and environmental pollution control, can solve the problems that have not yet been seen as nano-zero-valent iron repair materials, and achieve good dechlorination and detoxification effects

Inactive Publication Date: 2016-11-09
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no research or report on the preparation of nano-zero-valent iron repair materials by pyrolysis carbonization of sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 Preparation of nano-Fe(0)-porous sludge carbon

[0045] 1. Raw materials and dosage

[0046] Municipal sludge (dry basis): 10 g

[0047] Fe(NO 3 ) 3 9H 2 O: 87g

[0048] Acrylic: 4 g

[0049]Water: 60ml.

[0050] 2. Process steps

[0051] (1) Pretreatment: 10g municipal sludge, 87g Fe(NO 3 ) 3 9H 2 0. After mixing 4g of organic pore-forming agent and 60ml of water, stir for 12h to homogenate, dry at 105°C, grind, and cross 100 mesh sieves to obtain iron-containing salt sludge powder;

[0052] (2) Pyrolytic carbonization-thermal reduction: put the above-mentioned iron-containing salt sludge powder in a high-temperature carbonization furnace, under the protection of nitrogen, raise the temperature to 600°C at 10°C / min, and pyrolyze for 2 hours to obtain iron-containing porous Sludge carbon, and then raise the temperature to 800°C for carbon-hydrogen thermal reduction to obtain nano-Fe(0)-porous sludge carbon;

[0053] (3) Post-treatment: Wash the nan...

Embodiment 2

[0057] Example 2 Preparation of nano Fe(0)-porous sludge carbon

[0058] 1. Raw materials and dosage

[0059] Municipal sludge (dry basis): 10 g (containing 17% organic carbon)

[0060] Starch: 4g

[0061] FeSO 4 .7H 2 O: 70g

[0062] Acrylic resin: 3 g

[0063] Water: 60ml.

[0064] 2. Process steps

[0065] (1) Pretreatment: 10g sludge, 4g starch, 70g FeSO 4 .7H 2 0. After mixing 3g acrylic resin and 60ml water, stir for 12h homogenate, dry at 105°C, grind, cross 100 mesh sieves to obtain iron salt sludge powder;

[0066] (2) Pyrolytic carbonization-thermal reduction: put the above-mentioned iron-containing salt sludge powder in a high-temperature carbonization furnace, under the protection of nitrogen, raise the temperature to 600°C at 10°C / min, and pyrolyze for 2 hours to obtain iron-containing porous Sludge carbon, and then raise the temperature to 800°C for carbon-hydrogen thermal reduction to obtain nano-Fe(0)-porous sludge carbon;

[0067] (3) Post-treatment...

Embodiment 3

[0071] Example 3 Preparation of nano Fe(0)-porous sludge carbon

[0072] 1. Raw materials and dosage

[0073] Printing and dyeing sludge (dry basis): 10 g (containing 26 % organic carbon, 9 % Fe)

[0074] FeCl 3 ·6H 2 O: 29g

[0075] Polyurethane resin: 4 g

[0076] Water: 60ml.

[0077] 2. Process steps

[0078] (1) Pretreatment: 10g sludge, 29g FeCl 3 ·6H 2 O. After mixing 4g of polyurethane resin and 60ml of water, stir for 12h to homogenate, dry at 105°C, grind, and pass through a 100-mesh sieve to obtain iron salt-containing sludge powder.

[0079] (2) Pyrolytic carbonization-thermal reduction: put the above-mentioned iron-containing salt sludge powder in a high-temperature carbonization furnace, under the protection of nitrogen, raise the temperature to 600°C at 10°C / min, and pyrolyze for 2 hours to obtain iron-containing porous The sludge carbon was then raised to 800 °C for carbon-hydrogen thermal reduction to obtain nano-Fe(0)-porous sludge carbon.

[0080] ...

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Abstract

The invention discloses a preparation method of a nanometer Fe(0)-porous sludge carbon material. The method includes: taking iron salt as an iron source of nanometer Fe(0), taking sludge as a precursor for thermal reduction of porous carbon and iron salt, taking an organic matter capable of generating a great quantity of gas by thermal decomposition at 300-500 DEG C as a pore forming agent, taking waste organics as a carbon regulating agent (in order to solve the problem of difference of organic carbon composition of sludge different in source), taking water as a harmonizing agent, and performing pyrolysis carbonization and thermal reduction at 500-900 DEG C to obtain the nanometer Fe(0)-porous sludge carbon material being 0.01-100micron in pore diameter, wherein Fe(0) average particle size is 30-80mm. The nanometer Fe(0)-porous sludge carbon material is effective in dechlorination and toxicity reduction and has a promising application prospect in various environmental pollution control fields including dehalogenation reduction, soil remediation, heavy metal wastewater treatment, printing and dyeing wastewater treatment and / or anaerobic wastewater treatment and the like, and sludge recycling and 'using waste to treat waste' are realized.

Description

technical field [0001] The invention belongs to the technical field of waste resource utilization and environmental pollution control. More specifically, it relates to a preparation method and application of a nano-Fe(0)-porous sludge carbon material. Background technique [0002] Zero-valent iron has very active chemical properties, and its electrode potential is low ( E 0 ( Fe 2+ / Fe 0 )=-0.44 V ), strong reducibility, all the metals behind Fe in the metal activity sequence table can be deposited on its surface through substitution reaction with it, and at the same time, some substances with strong oxidizing properties can be reduced. Therefore, zero-valent iron is widely used as an environmental remediation agent, especially for the dechlorination and attenuation of biorefractory organic chlorides. [0003] As an improvement of zero-valent iron technology, nano-zero-valent iron technology is commonly used to prepare nano-Fe(0) by sodium borohydride liquid phase r...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F103/30
CPCB01J20/20C02F1/288C02F2103/30
Inventor 熊亚田双红陈婷蔡权冯锦茜
Owner SUN YAT SEN UNIV
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