CN107282019A - Heavy metal absorbent prepared by a kind of utilization cereal shell and preparation method thereof - Google Patents
Heavy metal absorbent prepared by a kind of utilization cereal shell and preparation method thereof Download PDFInfo
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- CN107282019A CN107282019A CN201710572743.XA CN201710572743A CN107282019A CN 107282019 A CN107282019 A CN 107282019A CN 201710572743 A CN201710572743 A CN 201710572743A CN 107282019 A CN107282019 A CN 107282019A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Abstract
The invention discloses heavy metal absorbent prepared by a kind of utilization cereal shell, heavy metal absorbent prepared by the utilization cereal shell is mainly made up of following parts by weight material：35 68 parts of cereal shell, 3 10 parts of chitin, 38 parts of modified alta-mud, 5 10 parts of modification infusorial earth, 8 12 parts of seawood meal, 38 parts of feather meal, 5 10 parts of citric acid, 58 parts of oligosaccharide, 58 parts of chitosan, 20 30 parts of silica gel, 20 30 parts of resin；The present invention is using primary raw material of the cereal shell as adsorbent, handled by cellulase and buck, the cereal shell powder being made has significant suction-operated with modified alta-mud, modification infusorial earth synergy heavy metal ion, chelating is carried out with feather meal, seawood meal, oligosaccharide, chitosan form macromolecular again, tightly adsorbed by silica gel and resin, reach the effect of effective heavy-metal ion removal.
Description
Technical field
The present invention relates to pollution processing technology field.It is more particularly related to prepared by a kind of utilization cereal shell
Heavy metal absorbent and preparation method thereof.
Background technology
Heavy metal original meaning refers to the metal (density be more than 4.5 grams metals per cubic centimeter) that proportion is more than 5, including gold,
Silver, copper, iron, lead etc..Heavy metal pollution is different from the pollution of other organic compounds.Many organic compounds can pass through nature
Boundary physics itself, chemistry or biological purification, makes harmfulness reduce or release.And heavy metal has enriching, it is difficult to
Degraded in environment.
At present China due in the exploitation, smelting, process of heavy metal, cause many heavy metals for example lead, mercury, cadmium,
Cobalt etc. enters big gas and water, soil and causes serious environmental pollution.The heavy metal such as discharged with waste water, also can be even if concentration is small
Accumulate, adsorbed by fish and shellfish body surface in algae and bed mud, food chain concentration is produced, so as to cause public hazards.
In human body with protein and various enzymes strong interaction can occur for heavy metal, them is lost activity,
It may be enriched with some organs of human body, if it exceeds the limit that human body is resistant to, can cause human body acute poisoning, Asia anxious
Property poisoning, slow poisoning etc., people is known from experience and causes very big harm, for example, minamata disease (mercury pollution) and ostalgia that Japan occurs
Nuisance diseases such as sick (cadmium pollutions), is all as caused by heavy metal pollution.
The content of the invention
Present invention aim to address above mentioned problem, there is provided a kind of significant weight prepared using cereal shell of cost ineffective fruit
Metal absorbent, the present invention is handled by cellulase and buck, is made using primary raw material of the cereal shell as adsorbent
Cereal shell powder and modified alta-mud, modification infusorial earth synergy heavy metal ion have a significant suction-operated, then with plumage
Mao Fen, seawood meal, oligosaccharide, chitosan carry out chelating and form macromolecular, are tightly adsorbed by silica gel and resin, reach effective removal
The effect of heavy metal ion, the present invention can significantly remove the heavy metal ion in sewage, for remove sewage in heavy metal from
Son has remarkable result；
The present invention also provides a kind of preparation method of heavy metal absorbent prepared by utilization cereal shell, and wherein cereal shell passes through
Handled again by buck after cellulase degradation, macromolecular is digested into small molecule, specific surface area increase is significantly improved to a huge sum of money
Belong to ion adsorption capacity, silica gel and resin form little particle silica column by high-pressure fog and shown for the adsorption capacity of macromolecular
Write and improve.
The technical scheme that the present invention is provided is：
A kind of heavy metal absorbent prepared by utilization cereal shell, heavy metal absorbent prepared by the utilization cereal shell is main
It is made up of following parts by weight material：35-68 parts of cereal shell, 3-10 parts of chitin, 3-8 parts of modified alta-mud, modification infusorial earth 5-
10 parts, 8-12 parts of seawood meal, 3-8 parts of feather meal, 5-10 parts of citric acid, 5-8 parts of oligosaccharide, 5-8 parts of chitosan, silica gel 20-30
Part, 20-30 parts of resin.
Preferably, the heavy metal absorbent that prepared by the utilization cereal shell is mainly made up of following parts by weight material：Paddy
52 parts of thing shell, 8 parts of chitin, 6 parts of modified alta-mud, 8 parts of modification infusorial earth, 9 parts of seawood meal, 5 parts of feather meal, 8 parts of citric acid,
6 parts of oligosaccharide, 7 parts of chitosan, 26 parts of silica gel, 25 parts of resin.
Preferably, the modified alta-mud is made up of following methods：Bentonite is added into 2 times of heavy deionized waters, then
Add after sodium acid carbonate regulation PH to 11-12, add 10-15% organic silicone oils, ball milling is placed in calcining furnace after 20-30 minutes
Temperature is increased to 300-450 DEG C, after calcining 1-4 hours, and taking-up is cooled to room temperature, adds isometric concentration for mass fraction
95% ethanol, ball milling ignition in 20-30 minutes to ethanol is burnt out, and re-dry obtains the modified alta-mud.
Preferably, the modification infusorial earth is made up of following methods：Diatomite is added into 2 times of heavy deionized waters, plus
Enter citric acid regulation PH to 3-5, ball milling stands 20-30 minutes after 20-30 minutes, add sodium acid carbonate regulation PH to 11-12
Afterwards, after ball milling 20-30 minutes, it is placed in temperature in calcining furnace and is increased to 300-450 DEG C, after calcining 1-4 hours, taking-up is cooled to room
Temperature obtains the modification infusorial earth.
The present invention also provides a kind of preparation method of heavy metal absorbent prepared by described utilization cereal shell, the preparation
Method comprises the following steps：
Step 1: after cereal shell is dried, crushing 100 mesh sieve, and obtaining cereal shell powder, by weights such as cereal shell powder additions
After the water of amount, 1-2% weight cellulases are added, the buck that PH is 11-12 is added after standing 1-2 hours, after filtering, 2-4 is soaked
After hour, it is neutrality that centrifugal filtration, which is rinsed to PH, and treated cereal shell powder is obtained after drying；
Step 2: will be heated to after silica gel and mixed with resin after molten condition, stir 30 minutes, it is rear using nitrogen through too high
Cooling immediately obtains silica column particle after pressure shower nozzle spraying is scattered, and the pressure of its mesohigh is 100-200Mpa；
Step 3: by treated cereal shell powder, silica column particle, chitin, modified alta-mud, modification infusorial earth,
After seawood meal, feather meal, citric acid, oligosaccharide and chitosan mixing, isometric deionized water is added, is uniformly mixed
Afterwards, carbon dioxide 20mg/L is passed through, the heavy metal absorbent is obtained after drying.
The present invention at least includes following beneficial effect：
The present invention is handled, the paddy being made using primary raw material of the cereal shell as adsorbent by cellulase and buck
Thing shell powder and modified alta-mud, modification infusorial earth synergy heavy metal ion have a significant suction-operated, then with feather
Powder, seawood meal, oligosaccharide, chitosan carry out chelating and form macromolecular, are tightly adsorbed by silica gel and resin, reach and effectively remove weight
The effect of metal ion, the present invention can significantly remove the heavy metal ion in sewage, for removing the heavy metal ion in sewage
With remarkable result, the modified alta-mud that the present invention is added is added after organosilicon by using ethanol combustion after calcining, significantly
Improve bentonitic porosity so that space is uniform, significantly increasing for bentonitic specific surface area is improved heavy metal ion adsorbed
Property；
The present invention also provides a kind of preparation method of heavy metal absorbent prepared by utilization cereal shell, and wherein cereal shell passes through
Handled again by buck after cellulase degradation, macromolecular is digested into small molecule, specific surface area increase is significantly improved to a huge sum of money
Belong to ion adsorption capacity, silica gel and resin form little particle silica column by high-pressure fog and shown for the adsorption capacity of macromolecular
Write and improve.
Further advantage, target and the feature of the present invention embodies part by following explanation, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Embodiment
With reference to example below, the present invention is described in further detail, to make those skilled in the art with reference to specification
Word can be implemented according to this.
Wherein 1 part of the embodiment of the present invention is 1kg
Embodiment 1
A kind of heavy metal absorbent prepared by utilization cereal shell, heavy metal absorbent prepared by the utilization cereal shell is main
It is made up of following parts by weight material：35 parts of cereal shell, 3 parts of chitin, 3 parts of modified alta-mud, 5 parts of modification infusorial earth, seawood meal 8
Part, 3 parts of feather meal, 5 parts of citric acid, 5 parts of oligosaccharide, 5 parts of chitosan, 20 parts of silica gel, 20 parts of resin.
Wherein, the modified alta-mud is made up of following methods：Bentonite is added into 2 times of heavy deionized waters, added
After sodium acid carbonate regulation PH to 11,10% organic silicone oil is added, ball milling is placed in temperature in calcining furnace and is increased to 300 after 20 minutes
DEG C, after calcining 1 hour, taking-up is cooled to room temperature, adds isometric concentration for the ethanol of mass fraction 95%, 20 minutes points of ball milling
Fire burning to ethanol is burnt out, and re-dry obtains the modified alta-mud.
The modification infusorial earth is made up of following methods：Diatomite is added into 2 times of heavy deionized waters, citric acid is added and adjusts
PH to 3 is saved, ball milling stands 20 minutes after 20 minutes, added after sodium acid carbonate regulation PH to 11, ball milling is placed in after 20 minutes
Temperature is increased to 300 DEG C in calcining furnace, after calcining 1 hour, and taking-up is cooled to room temperature and obtains the modification infusorial earth.
The preparation method of heavy metal absorbent prepared by described utilization cereal shell, comprises the following steps：
Step 1: after cereal shell is dried, crushing 100 mesh sieve, and obtaining cereal shell powder, by weights such as cereal shell powder additions
After the water of amount, 1% heavy cellulase is added, the buck that PH is 11 is added after standing 1 hour, after filtering, after soaking 2 hours, from
Heart filtering rinsing is neutrality to PH, and treated cereal shell powder is obtained after drying；
Step 2: will be heated to after silica gel and mixed with resin after molten condition, stir 30 minutes, it is rear using nitrogen through too high
Cooling immediately obtains silica column particle after pressure shower nozzle spraying is scattered, and the pressure of its mesohigh is 100Mpa；
Step 3: by treated cereal shell powder, silica column particle, chitin, modified alta-mud, modification infusorial earth,
After seawood meal, feather meal, citric acid, oligosaccharide and chitosan mixing, isometric deionized water is added, is uniformly mixed
Afterwards, carbon dioxide 20mg/L is passed through, the heavy metal absorbent is obtained after drying.
Embodiment 2
A kind of heavy metal absorbent prepared by utilization cereal shell, heavy metal absorbent prepared by the utilization cereal shell is main
It is made up of following parts by weight material：68 parts of cereal shell, 10 parts of chitin, 8 parts of modified alta-mud, 10 parts of modification infusorial earth, marine alga
12 parts of powder, 8 parts of feather meal, 10 parts of citric acid, 8 parts of oligosaccharide, 8 parts of chitosan, 30 parts of silica gel, 30 parts of resin.
Wherein, the modified alta-mud is made up of following methods：Bentonite is added into 2 times of heavy deionized waters, added
After sodium acid carbonate regulation PH to 12,15% organic silicone oil is added, ball milling is placed in temperature in calcining furnace and is increased to 450 after 30 minutes
DEG C, after calcining 4 hours, taking-up is cooled to room temperature, adds isometric concentration for the ethanol of mass fraction 95%, 30 minutes points of ball milling
Fire burning to ethanol is burnt out, and re-dry obtains the modified alta-mud.
The modification infusorial earth is made up of following methods：Diatomite is added into 2 times of heavy deionized waters, citric acid is added and adjusts
PH to 5 is saved, ball milling stands 30 minutes after 30 minutes, added after sodium acid carbonate regulation PH to 12, ball milling is placed in after 30 minutes
Temperature is increased to 450 DEG C in calcining furnace, after calcining 4 hours, and taking-up is cooled to room temperature and obtains the modification infusorial earth.
The preparation method of heavy metal absorbent prepared by described utilization cereal shell, comprises the following steps：
Step 1: after cereal shell is dried, crushing 100 mesh sieve, and obtaining cereal shell powder, by weights such as cereal shell powder additions
After the water of amount, 2% heavy cellulase is added, the buck that PH is 12 is added after standing 2 hours, after filtering, after soaking 4 hours, from
Heart filtering rinsing is neutrality to PH, and treated cereal shell powder is obtained after drying；
Step 2: will be heated to after silica gel and mixed with resin after molten condition, stir 30 minutes, it is rear using nitrogen through too high
Cooling immediately obtains silica column particle after pressure shower nozzle spraying is scattered, and the pressure of its mesohigh is 200Mpa；
Step 3: by treated cereal shell powder, silica column particle, chitin, modified alta-mud, modification infusorial earth,
After seawood meal, feather meal, citric acid, oligosaccharide and chitosan mixing, isometric deionized water is added, is uniformly mixed
Afterwards, carbon dioxide 20mg/L is passed through, the heavy metal absorbent is obtained after drying.
Embodiment 3
Heavy metal absorbent prepared by a kind of utilization cereal shell, is mainly made up of following parts by weight material：52 parts of cereal shell,
8 parts of chitin, 6 parts of modified alta-mud, 8 parts of modification infusorial earth, 9 parts of seawood meal, 5 parts of feather meal, 8 parts of citric acid, oligosaccharide 6
Part, 7 parts of chitosan, 26 parts of silica gel, 25 parts of resin.
Wherein, the modified alta-mud is made up of following methods：Bentonite is added into 2 times of heavy deionized waters, added
After sodium acid carbonate regulation PH to 11,12% organic silicone oil is added, ball milling is placed in temperature in calcining furnace and is increased to 400 after 25 minutes
DEG C, after calcining 3 hours, taking-up is cooled to room temperature, adds isometric concentration for the ethanol of mass fraction 95%, 25 minutes points of ball milling
Fire burning to ethanol is burnt out, and re-dry obtains the modified alta-mud.
The modification infusorial earth is made up of following methods：Diatomite is added into 2 times of heavy deionized waters, citric acid is added and adjusts
PH to 4 is saved, ball milling stands 25 minutes after 25 minutes, added after sodium acid carbonate regulation PH to 12, ball milling is placed in after 25 minutes
Temperature is increased to 420 DEG C in calcining furnace, after calcining 2 hours, and taking-up is cooled to room temperature and obtains the modification infusorial earth.
The preparation method of heavy metal absorbent prepared by described utilization cereal shell, comprises the following steps：
Step 1: after cereal shell is dried, crushing 100 mesh sieve, and obtaining cereal shell powder, by weights such as cereal shell powder additions
After the water of amount, 2% heavy cellulase is added, the buck that PH is 11 is added after standing 1 hour, after filtering, after soaking 3 hours, from
Heart filtering rinsing is neutrality to PH, and treated cereal shell powder is obtained after drying；
Step 2: will be heated to after silica gel and mixed with resin after molten condition, stir 30 minutes, it is rear using nitrogen through too high
Cooling immediately obtains silica column particle after pressure shower nozzle spraying is scattered, and the pressure of its mesohigh is 160Mpa；
Step 3: by treated cereal shell powder, silica column particle, chitin, modified alta-mud, modification infusorial earth,
After seawood meal, feather meal, citric acid, oligosaccharide and chitosan mixing, isometric deionized water is added, is uniformly mixed
Afterwards, carbon dioxide 20mg/L is passed through, the heavy metal absorbent is obtained after drying.
Experiment：Using embodiment 1-3 heavy metal absorbent, to the sewage sampling 3000L of certain sewage treatment plant, sewage contains
Cadmium ion 20.8mg/L, lead ion 32.5mg/L, are divided into 3 groups of A, B, C by 3000L sewage sample, correspond to add respectively and implement
Example 1-3 heavy metal absorbent 200g, stir process is after 3 hours, is recovered by filtration heavy metal absorbent, the sewage of test processes,
Cadmium ion ND, lead ion ND, the heavy metal absorbent of recovery can be reused.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the embodiment with description.
Claims (5)
1. a kind of heavy metal absorbent prepared by utilization cereal shell, it is characterised in that heavy metal prepared by the utilization cereal shell
Adsorbent is mainly made up of following parts by weight material：35-68 parts of cereal shell, 3-10 parts of chitin, 3-8 parts of modified alta-mud, change
5-10 parts of diatomite of property, 8-12 parts of seawood meal, 3-8 parts of feather meal, 5-10 parts of citric acid, 5-8 parts of oligosaccharide, 5-8 parts of chitosan,
20-30 parts of silica gel, 20-30 parts of resin.
2. heavy metal absorbent prepared by utilization cereal shell according to claim 1, it is characterised in that the utilization cereal
Heavy metal absorbent prepared by shell is mainly made up of following parts by weight material：52 parts of cereal shell, 8 parts of chitin, modified alta-mud 6
Part, 8 parts of modification infusorial earth, 9 parts of seawood meal, 5 parts of feather meal, 8 parts of citric acid, 6 parts of oligosaccharide, 7 parts of chitosan, 26 parts of silica gel,
25 parts of resin.
3. heavy metal absorbent prepared by utilization cereal shell according to claim 2, it is characterised in that the bentone
Soil is made up of following methods：Bentonite is added into 2 times of heavy deionized waters, added after sodium acid carbonate regulation PH to 11-12, plus
Enter 10-15% organic silicone oils, ball milling is placed in temperature in calcining furnace and is increased to 300-450 DEG C, calcine 1-4 hours after 20-30 minutes
Afterwards, take out and be cooled to room temperature, add isometric concentration for the ethanol of mass fraction 95%, ball milling ignition in 20-30 minutes is extremely
Ethanol is burnt out, and re-dry obtains the modified alta-mud.
4. heavy metal absorbent prepared by utilization cereal shell according to claim 3, it is characterised in that the modified diatom
Soil is made up of following methods：Diatomite is added into 2 times of heavy deionized waters, citric acid regulation PH to 3-5, ball milling 20-30 is added
After minute, 20-30 minutes are stood, is added after sodium acid carbonate regulation PH to 11-12, ball milling is placed in calcining furnace after 20-30 minutes
Middle temperature is increased to 300-450 DEG C, after calcining 1-4 hours, and taking-up is cooled to room temperature and obtains the modification infusorial earth.
5. the preparation method of heavy metal absorbent prepared by any described utilization cereal shell in a kind of 1-4 according to claim,
Characterized in that, the preparation method comprises the following steps：
Step 1: after cereal shell is dried, crushing 100 mesh sieve, and obtaining cereal shell powder, by weight such as cereal shell powder additions
After water, 1-2% weight cellulases are added, the buck that PH is 11-12 is added after standing 1-2 hours, after filtering, is soaked 2-4 hours
Afterwards, it is neutrality that centrifugal filtration, which is rinsed to PH, and treated cereal shell powder is obtained after drying；
Step 2: will be heated to after silica gel and mixed with resin after molten condition, stir 30 minutes, it is rear that high pressure spray is passed through using nitrogen
Cooling immediately obtains silica column particle after head spraying is scattered, and the pressure of its mesohigh is 100-200Mpa；
Step 3: by treated cereal shell powder, silica column particle, chitin, modified alta-mud, modification infusorial earth, marine alga
After powder, feather meal, citric acid, oligosaccharide and chitosan mixing, isometric deionized water is added, after being uniformly mixed, is led to
Enter carbon dioxide 20mg/L, the heavy metal absorbent is obtained after drying.
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| CN108557943A (en) * | 2018-04-16 | 2018-09-21 | 合肥聪亨新型建材科技有限公司 | A kind of special water purification agent of wastewater treatment and preparation method thereof |
| CN109126697A (en) * | 2018-09-10 | 2019-01-04 | 浙江海洋大学 | A kind of natural material compound adsorbent and preparation method thereof, application |
| CN109126697B (en) * | 2018-09-10 | 2021-08-20 | 浙江海洋大学 | Natural material composite adsorbent and preparation method and application thereof |
| CN112792121A (en) * | 2020-11-25 | 2021-05-14 | 宁波城市阳光环境建设工程有限公司 | Mine ecological restoration method applying mycorrhiza technology |
| CN112792121B (en) * | 2020-11-25 | 2022-09-02 | 宁波城市阳光环境建设工程有限公司 | Mine ecological restoration method applying mycorrhiza technology |
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