Hydrated ferric oxide loaded nano-composite semi-coke and preparation method thereof

A technology of hydrated iron oxide and iron oxide nanometers, which is applied in chemical instruments and methods, other chemical processes, water/sewage treatment, etc., and can solve the problem of unsatisfactory deep phosphorus removal effect of hydrated iron oxide

Inactive Publication Date: 2014-05-07
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a nano-composite semi-coke loaded with hydrated iron oxide and its preparation method, aiming to solve the problem that the deep phosphorus removal effect of the existing hydrated iron oxide is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing hydrated iron oxide nanocomposite semi-coke, comprising the following steps:

[0024] (1) Take 5g of biomass pyrolysis semi-coke with good pore distribution and stable skeleton into a three-neck flask, add 10ml of ethanol and 100ml of water, stir for 30min, and repeat suction filtration and washing 3 times to obtain sample 1.

[0025] (2) Transfer the sample 1 obtained in step (1) into a three-necked flask, add 20ml of ethanol, 10ml of concentrated hydrochloric acid with a concentration of 37%, and 170ml of 1mol / L FeCl 3 solution, stirred for 12 hours, repeated suction filtration and washing 3 times to obtain sample 2;

[0026] (3) Transfer the sample 2 obtained in step (2) into a 250ml beaker, add 200ml of water, add 0.1M NaOH dropwise while stirring until the pH is 12, filter with suction, wash, and then put it in a vacuum oven at 60°C and -0.05KPa for 72h. The nanocomposite semi-coke 1 loaded with hydrated iron oxide was obtained.

Embodiment 2

[0028] A method for preparing hydrated iron oxide nanocomposite semi-coke, comprising the following steps:

[0029] (1) Take 2g of biomass pyrolysis semi-coke with good pore distribution and stable skeleton into a three-necked flask, add 5ml of ethanol and 50ml of water, stir for 20min, and repeat suction filtration and washing 3 times to obtain sample 1.

[0030] (2) Transfer the sample 1 obtained in step (1) into a three-necked flask, add 15ml of ethanol, 15ml of concentrated hydrochloric acid with a concentration of 37%, and 150ml of 1mol / L FeCl 3 solution, stirred for 10 h, repeated suction filtration and washing 3 times to obtain sample 2;

[0031] (3) Transfer the sample 2 obtained in step (2) into a 250ml beaker, add 150ml of water, add 0.1M NaOH dropwise while stirring, until the pH is 11, filter with suction, wash, and then put it in a vacuum oven at 60°C and -0.05KPa for 72h. The nanocomposite semi-coke 2 loaded with hydrated iron oxide was obtained.

Embodiment 3

[0033] A method for preparing hydrated iron oxide nanocomposite semi-coke, comprising the following steps:

[0034] (1) Take 10g of biomass pyrolysis semi-coke with good pore distribution and stable skeleton into a three-necked flask, add 15ml of ethanol and 150ml of water, stir for 40min, repeat suction filtration and washing 3 times, and obtain sample 1.

[0035] (2) Transfer the sample 1 obtained in step (1) into a three-necked flask, add 25ml of ethanol, 25ml of concentrated hydrochloric acid with a concentration of 37%, and 250ml of 1mol / LFeCl 3 solution, stirred for 14 hours, and repeated suction filtration and washing 3 times to obtain sample 2;

[0036] (3) Transfer the sample 2 obtained in step (2) into a 250ml beaker, add 250ml of water, add 0.1M NaOH dropwise while stirring until the pH is 13, filter with suction, wash, and then put it in a vacuum oven at 60°C and -0.05KPa for 72h. The nanocomposite semi-coke 3 loaded with hydrated iron oxide was obtained.

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Abstract

The invention provides a hydrated ferric oxide loaded nano-composite semi-coke and a preparation method of the hydrated ferric oxide loaded nano-composite semi-coke. The method comprises the following steps: taking biomass pyrolysis semi-coke with good pore distribution and electronic constraint feature as a carrier, introducing FeCl<4-> ion into inside and outside surfaces of the biomass pyrolysis semi-coke through ion exchange effect, and then reducing the FeCl<4-> ion introduced into the inside and outside surfaces of the biomass pyrolysis semi-coke as nano hydrated ferric oxide, washing and drying to obtain the hydrated ferric oxide loaded nano-composite semi-coke. The Donnan pre-concentration effect of the biomass pyrolysis semi-coke for inorganic anions pollutant in the water body and the function of the nano hydrated ferric oxide for effectively removing phosphorus in waste water are combined, the defects that the nano hydrated ferric oxide particles are easy to agglomerate, the chemical property is unstable and the particle small pressure head is large in damage are overcome, and the phosphorus in the waste water can be fast, effectively and inexpensively adsorbed.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a nanocomposite semi-coke loaded with hydrated iron oxide and a preparation method thereof. Background technique [0002] Biomass semi-coke is the solid residue obtained by pyrolyzing biomass to produce fuel gas or fuel oil in the absence of oxygen, and its main component is fixed carbon. It has a complex pore structure and good surface properties, and can be used as an inexpensive adsorbent to replace traditional activated carbon adsorption materials. However, although biomass semi-coke has a certain absorption effect on phosphorus in wastewater, the absorption effect is not ideal. [0003] In addition, hydrated iron oxide can absorb phosphorus in wastewater. However, due to the shortcomings of nanometer hydrated iron oxide particles, such as easy agglomeration, unstable chemical properties, and large head loss due to small particles, there are still ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/58
Inventor 蒋珍茂周宏光魏世强谢德体
Owner SOUTHWEST UNIV
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