Porous oil absorption material and preparation and regeneration method thereof

Abstract

The invention discloses a porous oil absorption material and a preparation and regeneration method thereof. The porous oil absorption material is a porous ceramic material uniform in pore distribution and with the pore diameter distribution range of 0.1-100 micrometers and above 40% of porosity, the porous oil absorption material is prepared from Al2O3 and SiO2, surface activation treatment is conducted on the porous oil absorption material so as to improve the surface hydrophilicity of the material, and the porous oil absorption material is soaked with modified liquid to obtain super-strong oil absorption capacity. The porous oil absorption material having an oil contamination removing function has the advantages of being simple in modification process, low in modification cost, high in oil absorption speed, large in oil absorption amount, high in water body purification degree and convenient to regenerate and the like.

Description

technical field

[0001] The invention belongs to the field of environmental engineering water treatment, and relates to a porous oil-absorbing material and a method for making and regenerating the porous oil-absorbing material, specifically, the porous oil-absorbing material can perform advanced treatment on oily sewage. Background technique

[0002] At present, the treatment of oily wastewater mostly adopts "oil separation-flotation-biochemical treatment" or "oil separation-flotation-filtration". Under normal circumstances, after biochemical treatment of oily wastewater, a considerable part of the oil will be decomposed into organic hydrocarbons with smaller molecular weights. It is difficult to degrade the COD concentration of wastewater to below 50mg / L, which increases the difficulty of further advanced treatment of wastewater. The oily wastewater is treated in depth by means of filtration, usually walnut shells are used as the filter material, and clean water is used for ...

Examples

Embodiment 1

[0017] A preparation process of a porous oil-absorbing material capable of advanced treatment of oily sewage, using Al with uniform pore size distribution 2 o 3 —SiO 2 Based on the self-prepared porous material as the matrix, the long carbon chain organic acid is used as the modifier, and alcohol and water are used as the solvent to perform modification. The modification steps include:

[0018] ①Wash the self-prepared porous ceramsite with a particle size of 0.5mm to 6mm with water to remove the dirt and dust on the surface, and dry it to obtain a spare porous material with a porosity of 40%;

[0019] ②Surface activation treatment: prepare an activation solution of 0.5% hydrogen peroxide and 0.5% nitric acid, immerse the spare material in the activation solution, control the constant temperature at 80°C for 1 hour, take it out after activation and dry it at 105°C to obtain an activated porous material;

[0020] ③ Preparation of modified solution: take 20V% ethanol, 5V% oleic...

Embodiment 2

[0030] A porous oil-absorbing material, the porous oil-absorbing material is a porous ceramic material with a pore size distribution in the range of 0.1um to 100um and uniform distribution, and a porosity of more than 40%. The porous ceramic material is made of Al 2 o 3 and SiO 2 The porous oil-absorbing material is subjected to surface activation treatment to enhance the hydrophilicity of the surface of the material, and the porous oil-absorbing material is soaked in a modifying solution to obtain super oil-absorbing capacity.

[0031] The preparation method of porous oil-absorbing material, comprises the following steps: (1) select by Al 2 o 3 and SiO 2 The ceramic material composed of porous ceramsite with a particle size of 0.5mm ~ 6mm is washed with water to remove the dirt and dust on the surface, and dried to obtain a spare porous material with a porosity of 40%; (2) Surface activation treatment of the porous material In order to enhance the hydrophilicity of the su...

Embodiment 3

[0038] A preparation process of a porous functional material capable of advanced treatment of oily sewage, using Al with uniform pore size distribution 2 o 3 —SiO 2 Based on the self-prepared porous material as the matrix, the modification steps include:

[0039] ① Wash the self-prepared porous material with a particle size of 0.5 mm to 6 mm with water to remove the dirt and dust on the surface, and dry it to obtain a spare porous material;

[0040] ② Preparation of modified solution: take 20V% ethanol, 5V% oleic acid, and 75V% water to obtain a modified solution;

[0041] ③Modification: immerse the spare porous material in the modification solution for 1 hour. After modification, take it out and keep it at a constant temperature of 150°C for 0.5 hour to obtain a porous oil-absorbing material with super oil-absorbing capacity.

[0042] After the material absorbs oil to saturation, the regeneration method of the embodiment 1 or embodiment 2 is used to realize the regeneratio...

technical field

[0001] The invention belongs to the field of environmental engineering water treatment, and relates to a porous oil-absorbing material and a method for making and regenerating the porous oil-absorbing material, specifically, the porous oil-absorbing material can perform advanced treatment on oily sewage. Background technique

[0002] At present, the treatment of oily wastewater mostly adopts "oil separation-flotation-biochemical treatment" or "oil separation-flotation-filtration". Under normal circumstances, after biochemical treatment of oily wastewater, a considerable part of the oil will be decomposed into organic hydrocarbons with smaller molecular weights. It is difficult to degrade the COD concentration of wastewater to below 50mg / L, which increases the difficulty of further advanced treatment of wastewater. The oily wastewater is treated in depth by means of filtration, usually walnut shells are used as the filter material, and clean water is used for ...

Examples

Embodiment 1

[0017] A preparation process of a porous oil-absorbing material capable of advanced treatment of oily sewage, using Al with uniform pore size distribution 2 o 3 —SiO 2 Based on the self-prepared porous material as the matrix, the long carbon chain organic acid is used as the modifier, and alcohol and water are used as the solvent to perform modification. The modification steps include:

[0018] ①Wash the self-prepared porous ceramsite with a particle size of 0.5mm to 6mm with water to remove the dirt and dust on the surface, and dry it to obtain a spare porous material with a porosity of 40%;

[0019] ②Surface activation treatment: prepare an activation solution of 0.5% hydrogen peroxide and 0.5% nitric acid, immerse the spare material in the activation solution, control the constant temperature at 80°C for 1 hour, take it out after activation and dry it at 105°C to obtain an activated porous material;

[0020] ③ Preparation of modified solution: take 20V% ethanol, 5V% oleic...

Embodiment 2

[0030] A porous oil-absorbing material, the porous oil-absorbing material is a porous ceramic material with a pore size distribution in the range of 0.1um to 100um and uniform distribution, and a porosity of more than 40%. The porous ceramic material is made of Al 2 o 3 and SiO 2 The porous oil-absorbing material is subjected to surface activation treatment to enhance the hydrophilicity of the surface of the material, and the porous oil-absorbing material is soaked in a modifying solution to obtain super oil-absorbing capacity.

[0031] The preparation method of porous oil-absorbing material, comprises the following steps: (1) select by Al 2 o 3 and SiO 2 The ceramic material composed of porous ceramsite with a particle size of 0.5mm ~ 6mm is washed with water to remove the dirt and dust on the surface, and dried to obtain a spare porous material with a porosity of 40%; (2) Surface activation treatment of the porous material In order to enhance the hydrophilicity of the su...

Embodiment 3

[0038] A preparation process of a porous functional material capable of advanced treatment of oily sewage, using Al with uniform pore size distribution 2 o 3 —SiO 2 Based on the self-prepared porous material as the matrix, the modification steps include:

[0039] ① Wash the self-prepared porous material with a particle size of 0.5 mm to 6 mm with water to remove the dirt and dust on the surface, and dry it to obtain a spare porous material;

[0040] ② Preparation of modified solution: take 20V% ethanol, 5V% oleic acid, and 75V% water to obtain a modified solution;

[0041] ③Modification: immerse the spare porous material in the modification solution for 1 hour. After modification, take it out and keep it at a constant temperature of 150°C for 0.5 hour to obtain a porous oil-absorbing material with super oil-absorbing capacity.

[0042] After the material absorbs oil to saturation, the regeneration method of the embodiment 1 or embodiment 2 is used to realize the regeneratio...