CN109809404A - A kind of Bayer process red mud modification biological activated carbon and preparation method thereof for degradation of formaldehyde - Google Patents
A kind of Bayer process red mud modification biological activated carbon and preparation method thereof for degradation of formaldehyde Download PDFInfo
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Abstract
The Bayer process red mud modification biological activated carbon and preparation method thereof that the invention discloses a kind of for degradation of formaldehyde, belongs to solid waste utilization of resources field.The Bayer process red mud modified biomass active carbon includes biomass castoff, red mud, phosphoric acid, dehydrated alcohol, hydrochloric acid and water.The biomass castoff is one of shell, fruit stone, stalk or a variety of.The red mud is Bayer process red mud.The present invention carries out compound preparing Bayer process red mud modification biological activated carbon using Bayer process red mud and biomass obsolete material, processing is modified to biomass obsolete material using the metal oxide contained in Bayer process red mud, reduce the production cost 50%~60% of modified activated carbon, the value added applications of Bayer process red mud Yu biomass obsolete material have been expanded, have realized the new approaches of " controlling danger with useless ".
Description
Technical field
The invention belongs to solid waste utilization of resources fields, and in particular to a kind of to carry out biomass castoff and Bayer process red mud
After grinding, and biomass castoff micro mist is modified using Bayer process red mud micro mist and obtains Bayer process red mud modification biological
Activated carbon.
Background technique
Time in all one's life of people about 80% is to spend indoors, therefore indoor environment effect the most frequently contacts with people
Place, the health of the superiority and inferiority of air quality inhabitation people by directly affecting.Building heat preservation is insulated now with people
Performance and interior decoration beautification require, and cause indoor environment volatile organic compounds concentration to improve, lead to indoor air quality
Problem is got worse, and wherein formaldehyde is one of typical pollutant in room air, has become the coke of research indoor air quality
Point problem.
Active carbon is a kind of carbonaceous material with flourishing porous structure Yu abundant specific surface area, is widely used in interior
The absorption of atmospheric volatility organic compound.However on the one hand since active carbon generallys use timber, prepared by bamboo, cause
Sustainable development that is at high cost and being unfavorable for ecological environment；The service life of another aspect active carbon is short, be easy to cause indoor ring
The secondary pollution in border；And active carbon is modified using metal oxide, the service life and drop of active carbon can be improved
Formaldehyde performance is solved, but will lead to preparation cost increase, therefore significantly limits the active carbon pollutant of environment removal indoors
Application.Bayer process red mud is the waste residue generated in aluminum oxide production process, and Main Components are SiO2、CaO、Fe2O3、Al2O3、
Na2O、TiO2, MgO etc., also containing alkali composition and the micro non-ferrous metal of burning, wherein Al2O3(8.4%~23.0%) and Fe2O3
The content of (22.0%~38.4%) is higher.If (such as: shell, fruit stone, straw using Bayer process red mud and biomass obsolete material
Stalk etc.) carry out it is compound prepare Bayer process red mud modification biological activated carbon, utilize the metal oxide contained in Bayer process red mud
Processing is modified to biomass obsolete material, not only solves the problem that modified activated carbon is at high cost, environmental disruption is big, and
The value added applications of Bayer process red mud Yu biomass obsolete material have been expanded, have realized the new approaches of " controlling danger with useless ".
Summary of the invention
In order to solve on the one hand to cause at high cost and be unfavorable for since active carbon generallys use timber, prepared by bamboo
The sustainable development of ecological environment；The service life of another aspect active carbon is short, be easy to cause the secondary pollution of indoor environment；With
And active carbon is modified using metal oxide, the service life and degradation of formaldehyde performance of active carbon can be improved, still
The problem of will lead to preparation cost increase.After biomass castoff and Bayer process red mud are carried out grinding by the present invention, and utilize
Bayer process red mud micro mist is modified biomass castoff micro mist and obtains Bayer process red mud modification biological activated carbon, while right
Grinding speed, grinding time, ultrasonic power, ultrasonic disperse time, drying temperature, calcination temperature, calcining time etc. are controlled,
To realize that the high added value of biomass castoff and Bayer process red mud recycles, degradation of formaldehyde superior performance and cost are obtained
The cheap modification biological activated carbon for degradation of formaldehyde.
In order to solve the above technical problems, the present invention is achieved by the following technical programs.
The present invention provides a kind of Bayer process red mud modification biological activated carbons for degradation of formaldehyde, and the active carbon is by weight
It is as follows to measure percentage raw material:
The biomass castoff is one of shell, fruit stone, stalk or a variety of；The red mud is Bayer process red mud；
The phosphoric acid is that analysis is pure；The dehydrated alcohol is that analysis is pure；The hydrochloric acid is that analysis is pure；The water is deionized water.
Invention also provides the preparation sides of the above-mentioned Bayer process red mud modification biological activated carbon for degradation of formaldehyde
Method specifically comprises the following steps:
Biomass castoff is cleaned first and after drying, using frequency conversion planetary ball mill with revolving speed 400r/min~
600r/min grinding 45min~90min obtains biomass castoff micro mist；By red mud using frequency conversion planetary ball mill to turn
Fast 400r/min~600r/min grinding 45min~90min obtains red mud micro mist.
Secondly after biomass castoff micro mist being mixed with phosphoric acid, the ultrasound for being 400W~600W using ultrasonic power
Wave cell crushing instrument ultrasonic disperse 30min~60min obtains biomass castoff micro mist solution；Red mud micro mist and water are carried out
Mixing and be added dropwise hydrochloric acid after, using ultrasonic power be 400W~600W ultrasonic cell disruption instrument ultrasonic disperse 30min~
60min obtains red mud micro mist solution；Biomass castoff micro mist solution is mixed and is added anhydrous with red mud micro mist solution
After ethyl alcohol, the ultrasonic cell disruption instrument ultrasonic disperse 60min~120min for being 600W~800W using ultrasonic power is visitd
Ear method red mud modification biological activated carbon precursor.
Finally by Bayer process red mud modification biological activated carbon precursor be placed in vacuum pressure be -0.08MPa~-
After the vacuum oven that 0.04MPa and temperature are 70 DEG C~90 DEG C carries out activation 120min~240min, it is using calcination temperature
200 DEG C~300 DEG C of experimental furnace roasts 15min~45min, obtains Bayer process red mud modification biological activated carbon.
The principles of science of the invention:
(1) Fe in Bayer process red mud main chemical compositions2O3The adsorption capacity that can effectively improve active carbon, is conducive to first
Aldehyde forms enrichment, TiO in the active carbon with porous structure2The formaldehyde being enriched in active carbon hole is made with catalytic degradation
With.
(2) timber, bamboo generation system are taken using the biomass obsolete material (such as: shell, fruit stone, stalk) containing charcoal ingredient
Standby activated carbon from activated sludge, not only reduces Activated Carbon Production cost, and promote the sustainable development of ecological environment.
(3) Bayer process red mud modification biological activated carbon utilizes the high absorption property and Bayer process of activated carbon from activated sludge
Absorption degradation effect and the catalytic degradation of red mud PARA FORMALDEHYDE PRILLS(91,95) act on, and realize the Synergistic degradation of activated carbon from activated sludge and Bayer process red mud
Formaldehyde effect.
Compared with prior art, the invention has the following advantages:
1, the present invention solves the prior art on the one hand since active carbon generallys use timber, prepared by bamboo, causes
Sustainable development that is at high cost and being unfavorable for ecological environment；The service life of another aspect active carbon is short, be easy to cause indoor ring
The secondary pollution in border；And active carbon is modified using Bayer process red mud, reduce the production cost of modified activated carbon
50%~60%, improve its market competitiveness and application range.
2, the present invention carries out compound system using Bayer process red mud and biomass obsolete material (such as: shell, fruit stone, stalk)
Standby Bayer process red mud modification biological activated carbon, using the metal oxide contained in Bayer process red mud to biomass obsolete material
It is modified processing, has expanded the value added applications of Bayer process red mud Yu biomass obsolete material, realizes " controlling danger with useless "
New approaches.
3, a kind of Bayer process red mud modification biological activated carbon and preparation method thereof for degradation of formaldehyde of the present invention meets
Related energy conservation and environmental protection, the policy requirements of circular economy.
Detailed description of the invention
Fig. 1 is that environmental test chamber simulates indoor environment schematic diagram；
In figure: 1, Temperature Humidity Sensor；2, thief hatch；3, fan；4, light source；A, formaldehyde gas；B, Bayer process red mud changes
Property activated carbon from activated sludge.
Specific embodiment
The present invention is described in detail below in conjunction with specific embodiment, but the present invention is not limited to following embodiments.
Embodiment 1
Component and its quality proportioning used for preparing product of the present invention 100g are as follows:
The biomass castoff is shell；The red mud is Bayer process red mud；The phosphoric acid is that analysis is pure；It is described anhydrous
Ethyl alcohol is that analysis is pure；The hydrochloric acid is that analysis is pure；The water is deionized water.
After biomass castoff is cleaned and dried first, using frequency conversion planetary ball mill with revolving speed 500r/min grinding
90min obtains biomass castoff micro mist；By red mud using frequency conversion planetary ball mill with revolving speed 600r/min grinding 60min,
Obtain red mud micro mist.
Secondly after biomass castoff micro mist being mixed with phosphoric acid, the supersonic cell for being 400W using ultrasonic power
Broken instrument ultrasonic disperse 30min, obtains biomass castoff micro mist solution；Red mud micro mist is mixed with water and hydrochloric acid is added dropwise
Afterwards, the ultrasonic cell disruption instrument ultrasonic disperse 50min for being 500W using ultrasonic power obtains red mud micro mist solution；It will be biological
It is the super of 800W using ultrasonic power after matter waste micro mist solution is mixed with red mud micro mist solution and dehydrated alcohol is added
Sound wave cell crushing instrument ultrasonic disperse 120min obtains Bayer process red mud modification biological activated carbon precursor.
It is -0.06MPa and temperature that Bayer process red mud modification biological activated carbon precursor, which is finally placed in vacuum pressure,
After carrying out activation 240min for 70 DEG C of vacuum ovens, 30min is roasted using the experimental furnace that calcination temperature is 200 DEG C, is obtained
Bayer process red mud modification biological activated carbon.
Embodiment 2
Component and its quality proportioning used for preparing product of the present invention 100g are as follows:
The biomass castoff is fruit stone；The red mud is Bayer process red mud；The phosphoric acid is that analysis is pure；It is described anhydrous
Ethyl alcohol is that analysis is pure；The hydrochloric acid is that analysis is pure；The water is deionized water.
After biomass castoff is cleaned and dried first, using frequency conversion planetary ball mill with revolving speed 400r/min grinding
45min obtains biomass castoff micro mist；By red mud using frequency conversion planetary ball mill with revolving speed 500r/min grinding 75min,
Obtain red mud micro mist.
Secondly after biomass castoff micro mist being mixed with phosphoric acid, the supersonic cell for being 600W using ultrasonic power
Broken instrument ultrasonic disperse 50min, obtains biomass castoff micro mist solution；Red mud micro mist is mixed with water and hydrochloric acid is added dropwise
Afterwards, the ultrasonic cell disruption instrument ultrasonic disperse 40min for being 400W using ultrasonic power obtains red mud micro mist solution；It will be biological
It is the super of 700W using ultrasonic power after matter waste micro mist solution is mixed with red mud micro mist solution and dehydrated alcohol is added
Sound wave cell crushing instrument ultrasonic disperse 60min obtains Bayer process red mud modification biological activated carbon precursor.
It is -0.04MPa and temperature that Bayer process red mud modification biological activated carbon precursor, which is finally placed in vacuum pressure,
After carrying out activation 180min for 80 DEG C of vacuum ovens, 15min is roasted using the experimental furnace that calcination temperature is 300 DEG C, is obtained
Bayer process red mud modification biological activated carbon.
Embodiment 3
Component and its quality proportioning used for preparing product of the present invention 100g are as follows:
The biomass castoff is stalk；The red mud is Bayer process red mud；The phosphoric acid is that analysis is pure；It is described anhydrous
Ethyl alcohol is that analysis is pure；The hydrochloric acid is that analysis is pure；The water is deionized water.
After biomass castoff is cleaned and dried first, using frequency conversion planetary ball mill with revolving speed 600r/min grinding
60min obtains biomass castoff micro mist；By red mud using frequency conversion planetary ball mill with revolving speed 400r/min grinding 90min,
Obtain red mud micro mist.
Secondly after biomass castoff micro mist being mixed with phosphoric acid, the supersonic cell for being 500W using ultrasonic power
Broken instrument ultrasonic disperse 40min, obtains biomass castoff micro mist solution；Red mud micro mist is mixed with water and hydrochloric acid is added dropwise
Afterwards, the ultrasonic cell disruption instrument ultrasonic disperse 60min for being 600W using ultrasonic power obtains red mud micro mist solution；It will be biological
It is the super of 600W using ultrasonic power after matter waste micro mist solution is mixed with red mud micro mist solution and dehydrated alcohol is added
Sound wave cell crushing instrument ultrasonic disperse 100min obtains Bayer process red mud modification biological activated carbon precursor.
It is -0.08MPa and temperature that Bayer process red mud modification biological activated carbon precursor, which is finally placed in vacuum pressure,
After carrying out activation 120min for 90 DEG C of vacuum ovens, 45min is roasted using the experimental furnace that calcination temperature is 250 DEG C, is obtained
Bayer process red mud modification biological activated carbon.
Embodiment 4
Component and its quality proportioning used for preparing product of the present invention 100g are as follows:
The biomass castoff is stalk；The red mud is Bayer process red mud；The phosphoric acid is that analysis is pure；It is described anhydrous
Ethyl alcohol is that analysis is pure；The hydrochloric acid is that analysis is pure；The water is deionized water.
After biomass castoff is cleaned and dried first, using frequency conversion planetary ball mill with revolving speed 400r/min grinding
75min obtains biomass castoff micro mist；By red mud using frequency conversion planetary ball mill with revolving speed 600r/min grinding 45min,
Obtain red mud micro mist.
Secondly after biomass castoff micro mist being mixed with phosphoric acid, the supersonic cell for being 500W using ultrasonic power
Broken instrument ultrasonic disperse 60min, obtains biomass castoff micro mist solution；Red mud micro mist is mixed with water and hydrochloric acid is added dropwise
Afterwards, the ultrasonic cell disruption instrument ultrasonic disperse 30min for being 400W using ultrasonic power obtains red mud micro mist solution；It will be biological
It is the super of 600W using ultrasonic power after matter waste micro mist solution is mixed with red mud micro mist solution and dehydrated alcohol is added
Sound wave cell crushing instrument ultrasonic disperse 80min obtains Bayer process red mud modification biological activated carbon precursor.
It is -0.04MPa and temperature that Bayer process red mud modification biological activated carbon precursor, which is finally placed in vacuum pressure,
After carrying out activation 150min for 70 DEG C of vacuum ovens, 15min is roasted using the experimental furnace that calcination temperature is 250 DEG C, is obtained
Bayer process red mud modification biological activated carbon.
Embodiment 5
Component and its quality proportioning used for preparing product of the present invention 100g are as follows:
The biomass castoff is fruit stone；The red mud is Bayer process red mud；The phosphoric acid is that analysis is pure；It is described anhydrous
Ethyl alcohol is that analysis is pure；The hydrochloric acid is that analysis is pure；The water is deionized water.
After biomass castoff is cleaned and dried first, using frequency conversion planetary ball mill with revolving speed 500r/min grinding
60min obtains biomass castoff micro mist；By red mud using frequency conversion planetary ball mill with revolving speed 400r/min grinding 90min,
Obtain red mud micro mist.
Secondly after biomass castoff micro mist being mixed with phosphoric acid, the supersonic cell for being 600W using ultrasonic power
Broken instrument ultrasonic disperse 60min, obtains biomass castoff micro mist solution；Red mud micro mist is mixed with water and hydrochloric acid is added dropwise
Afterwards, the ultrasonic cell disruption instrument ultrasonic disperse 50min for being 600W using ultrasonic power obtains red mud micro mist solution；It will be biological
It is the super of 700W using ultrasonic power after matter waste micro mist solution is mixed with red mud micro mist solution and dehydrated alcohol is added
Sound wave cell crushing instrument ultrasonic disperse 100min obtains Bayer process red mud modification biological activated carbon precursor.
It is -0.08MPa and temperature that Bayer process red mud modification biological activated carbon precursor, which is finally placed in vacuum pressure,
After carrying out activation 210min for 80 DEG C of vacuum ovens, 45min is roasted using the experimental furnace that calcination temperature is 200 DEG C, is obtained
Bayer process red mud modification biological activated carbon.
Embodiment 6
Component and its quality proportioning used for preparing product of the present invention 100g are as follows:
The biomass castoff is shell；The red mud is Bayer process red mud；The phosphoric acid is that analysis is pure；It is described anhydrous
Ethyl alcohol is that analysis is pure；The hydrochloric acid is that analysis is pure；The water is deionized water.
After biomass castoff is cleaned and dried first, using frequency conversion planetary ball mill with revolving speed 600r/min grinding
90min obtains biomass castoff micro mist；By red mud using frequency conversion planetary ball mill with revolving speed 500r/min grinding 60min,
Obtain red mud micro mist.
Secondly after biomass castoff micro mist being mixed with phosphoric acid, the supersonic cell for being 400W using ultrasonic power
Broken instrument ultrasonic disperse 30min, obtains biomass castoff micro mist solution；Red mud micro mist is mixed with water and hydrochloric acid is added dropwise
Afterwards, the ultrasonic cell disruption instrument ultrasonic disperse 60min for being 500W using ultrasonic power obtains red mud micro mist solution；It will be biological
It is the super of 800W using ultrasonic power after matter waste micro mist solution is mixed with red mud micro mist solution and dehydrated alcohol is added
Sound wave cell crushing instrument ultrasonic disperse 120min obtains Bayer process red mud modification biological activated carbon precursor.
It is -0.06MPa and temperature that Bayer process red mud modification biological activated carbon precursor, which is finally placed in vacuum pressure,
After carrying out activation 120min for 90 DEG C of vacuum ovens, 30min is roasted using the experimental furnace that calcination temperature is 300 DEG C, is obtained
Bayer process red mud modification biological activated carbon.
Comparative example 1
Component and its quality proportioning used for preparing product of the present invention 100g are as follows:
The biomass castoff is shell；The phosphoric acid is that analysis is pure；The dehydrated alcohol is that analysis is pure；The hydrochloric acid
It is pure to analyze；The water is deionized water.
After biomass castoff is cleaned and dried first, using frequency conversion planetary ball mill with revolving speed 600r/min grinding
90min obtains biomass castoff micro mist.
Secondly after biomass castoff micro mist being mixed with phosphoric acid, the supersonic cell for being 400W using ultrasonic power
Broken instrument ultrasonic disperse 30min, obtains biomass castoff micro mist solution；After water mixing hydrochloric acid, it is using ultrasonic power
The ultrasonic cell disruption instrument ultrasonic disperse 60min of 500W obtains hydrochloric acid solution；By biomass castoff micro mist solution and hydrochloric acid
After solution is mixed and dehydrated alcohol is added, the ultrasonic cell disruption instrument ultrasonic disperse for being 800W using ultrasonic power
120min obtains activated carbon from activated sludge precursor.
It is that -0.06MPa and vacuum at a temperature of 90 °C are done that activated carbon from activated sludge precursor, which is finally placed in vacuum pressure,
After dry case carries out activation 120min, 30min is roasted using the experimental furnace that calcination temperature is 300 DEG C, obtains activated carbon from activated sludge.
Examples 1 to 6 and comparative example 1 are prepared, performance testing process is as follows:
Environmental test chamber simulation indoor environment (as shown in Figure 1) generallyd use using European Union.Utilize Temperature Humidity Sensor
1, at 23 ± 0.5 DEG C, humidity is arranged 45 ± 3% temperature setting.The formaldehyde analysis for being 37%~40% 2.5 μ L concentration is pure molten
Drop is added on culture dish, is put into environmental test chamber, it is made sufficiently to volatilize in environmental test chamber, makes entire ring using fan 3
Formaldehyde gas a concentration in the test chamber of border is 1mg/m3.The Bayer process red mud modification biological activated carbon b of 40g is loaded to
0.1m2Test board on, excited using light source 4, make its generate degradation.Using acetylacetone,2,4-pentanedione spectrophotometry (GB/
T15516-1995), using thief hatch 2, select to sample the gas in the cabin 10L when 10h, detect formaldehyde gas in environmental test chamber
Concentration variation, so as to calculate the degradation of formaldehyde efficiency of Bayer process red mud modification biological activated carbon.
The degradation of formaldehyde efficiency of 1 Bayer process red mud modification biological activated carbon of table
Claims (2)
1. a kind of Bayer process red mud modification biological activated carbon for degradation of formaldehyde, which is characterized in that the active carbon is by weight
Percentage raw material is as follows:
The biomass castoff is one of shell, fruit stone, stalk or a variety of；The red mud is Bayer process red mud；It is described
Phosphoric acid is that analysis is pure；The dehydrated alcohol is that analysis is pure；The hydrochloric acid is that analysis is pure；The water is deionized water.
2. a kind of preparation method for the Bayer process red mud modification biological activated carbon of degradation of formaldehyde as described in claim 1,
It is characterized by comprising following steps:
After biomass castoff is cleaned and dried first, using frequency conversion planetary ball mill with revolving speed 400r/min~600r/
Min grinding 45min~90min obtains biomass castoff micro mist；By red mud using frequency conversion planetary ball mill with revolving speed
400r/min~600r/min grinding 45min~90min obtains red mud micro mist；
Secondly thin using the ultrasonic wave that ultrasonic power is 400W~600W after biomass castoff micro mist being mixed with phosphoric acid
Born of the same parents are crushed instrument ultrasonic disperse 30min~60min, obtain biomass castoff micro mist solution；Red mud micro mist is mixed with water
And after hydrochloric acid is added dropwise, the ultrasonic cell disruption instrument ultrasonic disperse 30min~60min for being 400W~600W using ultrasonic power,
Obtain red mud micro mist solution；Biomass castoff micro mist solution is mixed with red mud micro mist solution and dehydrated alcohol is added
Afterwards, the ultrasonic cell disruption instrument ultrasonic disperse 60min~120min for being 600W~800W using ultrasonic power obtains Bayer process
Red mud modification biological activated carbon precursor；
It is -0.08MPa~-0.04MPa that Bayer process red mud modification biological activated carbon precursor, which is finally placed in vacuum pressure,
Be after 70 DEG C~90 DEG C of vacuum oven carries out activation 120min~240min with temperature, using calcination temperature be 200 DEG C~
300 DEG C of experimental furnace roasts 15min~45min, obtains Bayer process red mud modification biological activated carbon.
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Cited By (1)
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| CN116654928A (en) * | 2023-06-06 | 2023-08-29 | 昆明理工大学 | Method for preparing porous carbon material by modifying red mud and application thereof |
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