CN108144577A - A kind of preparation method of heavy metal ion adsorbing material - Google Patents
A kind of preparation method of heavy metal ion adsorbing material Download PDFInfo
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- CN108144577A CN108144577A CN201711276784.0A CN201711276784A CN108144577A CN 108144577 A CN108144577 A CN 108144577A CN 201711276784 A CN201711276784 A CN 201711276784A CN 108144577 A CN108144577 A CN 108144577A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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Abstract
The present invention relates to adsorbent preparing technical fields, and in particular to a kind of preparation method of heavy metal ion adsorbing material.The present invention uses pig manure first,Dead leaves and bed-silt mixing,It ferments under microbial action in pig manure and bed-silt,The fermentation filter residue rich in organic matter is obtained by filtration,Then nanoscale hydrotalcite is prepared by hydro-thermal method,And potassium rhodanate and the fermentation filter residue rich in organic matter are added in while hydro-thermal reaction,Under the action of potassium rhodanate and fermentation filter residue,So that the metal ion in hydrotalcite leaves original lattice position and enters in fermentation filter residue organic phase,So as to which hydrotalcite generates hole on the lattice of hydrotalcite,Improve the adsorption activity of hydrotalcite,Obtain functional absorption material,Then air bladder is obtained into the infusion liquid rich in air bladder collagen with water infusion,Infusion liquid and konjak starch are blended again,Concentrated by rotary evaporation obtains concentrate,By extruder grain after concentrate and functional absorption material mixing,Again sorbing material is obtained through high temperature sintering.
Description
Technical field
The present invention relates to adsorbent preparing technical fields, and in particular to a kind of preparation side of heavy metal ion adsorbing material
Method.
Background technology
Water resource is Source of life, is the basis of social development and the necessary resources of economic development.21 century mankind face
The lot of challenges faced, water resources crisis problem is exactly one of them, and water pollution makes the crisis range more expand.Water pollution master
Source is wanted mainly there are seven major class, wherein influence of the heavy metal to the pollution of environment and to environment and the mankind is extremely prominent.
Heavy metal industrial effluent is a kind of extremely complex industrial wastewater of ingredient, essentially from mine, smelting, electrolysis, electricity
The waste water of the enterprises such as plating, pesticide, medicine, paint, pigment discharge.Mainly containing various heavy, grease, soda acid, organic in waste water
Object etc..Often pollutant concentration is high, toxicity is big for this kind of waste water, is difficult to biodegradation, not only pollutes water environment, also serious threat people
Class and the existence of aquatile.China's heavy metal pollution of water body problem is very prominent, and the pollution rate of river,lake and reservior substrate is up to
80.1%, lead, copper, mercury, chromium, cadmium, the content of zinc are exceeded in immediate offshore area seawater sampling product.In recent years, by the weight such as copper, nickel, chromium
The poisoning that metallic wastewater causes occurs repeatedly.Heavy metal pollution has become the great environmental for being related to human health and life
Problem.
Method of the absorption method as most common processing heavy metal pollution, absorption method are given up using adsorbent processing heavy metal
The method of water.There are many kinds of classes for the common material for preparing adsorbent, substantially can be divided into two classes：Inorganic mineral material and biological material
Material.Inorganic mineral material has clay（Such as bentonite and attapulgite）, zeolite, flyash, apatite, sepiolite, haydite etc., it is raw
Material includes plant, animal class and microbiology class three classes, such as activated carbon, chitosan.But inorganic mineral material is made
It is to cause the heavy metal ion of absorption insecure using its physical absorption performance mostly for adsorbent, easily generates desorption, absorption
The problem of stability is poor.
Therefore it provides the novel heavy metal ion sorbing material that a kind of absorption stability is good, adsorption efficiency is high is to adsorbent
Preparing technical field has positive meaning.
Invention content
Present invention mainly solves the technical issues of, as adsorbent be sharp mostly for common inorganic mineral material at present
With its physical absorption performance, the heavy metal ion for leading to absorption is insecure, easily generates desorption, and absorption stability is poor, absorption effect
The problem of rate is low provides a kind of preparation method of heavy metal ion adsorbing material.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
A kind of preparation method of heavy metal ion adsorbing material, it is characterised in that specifically preparation process is：
（1）It is fitted into fermentation tank, after sealing tank mouth, is left to ferment, hair after pig manure, dead leaves and bed-silt and water are mixed
It is separated by filtration to obtain ferment filtrate after ferment；
（2）The aluminum nitrate solution that magnesium nitrate solution and mass fraction that mass fraction is 30% are 25% is mixed 10~15min to obtain
To mixed solution, pre-reaction liquid is obtained after mixed solution and sodium hydroxide and potassium carbonate are mixed；
（3）Pre-reaction liquid is fitted into high pressure water heating kettle, then potassium rhodanate and ferment filtrate are added in into high pressure water heating kettle, it is closed
High pressure water heating kettle is heated to 150~160 DEG C, 30~34h of hydro-thermal reaction, to the end of hydro-thermal reaction under 1.2~1.4MPa
After be separated by filtration to obtain filter residue, expect after drying up to functional absorption, it is spare；
（4）It weighs air bladder and crushes 20~30min, obtain air bladder crushed material, air bladder crushed material and water are mixed, be heated to boiling simultaneously
Continue 2~3h of infusion, obtain infusion liquid, infusion liquid and konjak starch are mixed and are fitted into ball grinder, ground and mixed 30~
40min；
（5）After treating above-mentioned ground and mixed, mixture is obtained, fills this blend into Rotary Evaporators, concentrated by rotary evaporation obtains dense
Contracting liquid will obtain blank after concentrate and spare functional absorption material mixing；
（6）Above-mentioned blank is put into extruder grain in comminutor, control grain diameter is 5~6mm, then obtained particle is put into
Baking oven, dry 2~3h at 105~100 DEG C, and dried particle is put into Muffle furnace, first with the rate journey of 8 DEG C/min
Sequence is warming up to 500 DEG C of 20~30min of heat preservation sintering, then is warming up to 1000~1200 DEG C with the rate of 5 DEG C/min and continues heat preservation burning
After 2~3h of knot, cooled to room temperature discharges to get heavy metal ion adsorbing material.
Step（1）Described in pig manure, dead leaves and bed-silt and water mass ratio be 2:1:5:5, standing for fermentation
Temperature is 25~30 DEG C, and the time of standing for fermentation is 15~20 days.
Step（2）Described in mass fraction be 30% magnesium nitrate solution and mass fraction be 25% aluminum nitrate solution
Mass ratio is 5:4, mixed solution and the mass ratio of sodium hydroxide and potassium carbonate are 17:1:1.
Step（3）Described in the addition of potassium rhodanate be the 1% of pre-reaction liquid quality, the addition of ferment filtrate is
The 10% of pre-reaction liquid quality.
Step（4）Described in air bladder crushed material and water mass ratio be 1:10, the mass ratio of infusion liquid and konjak starch
It is 3:1.
Step（5）Described in concentrated by rotary evaporation temperature for 70~80 DEG C, the time of concentrated by rotary evaporation is 15~20min, dense
The mass ratio of contracting liquid and functional absorption material is 1:2.
The beneficial effects of the invention are as follows：
The present invention is mixed first with pig manure, dead leaves and bed-silt, and the microbial action in pig manure and bed-silt issues
Ferment is obtained by filtration the fermentation filter residue rich in organic matter, nanoscale hydrotalcite then is prepared by hydro-thermal method, and anti-in hydro-thermal
Potassium rhodanate and the fermentation filter residue rich in organic matter are added in while answering, under the action of potassium rhodanate and fermentation filter residue so that
Metal ion in hydrotalcite leaves original lattice position and enters in fermentation filter residue organic phase, so as to which hydrotalcite is in hydrotalcite
Hole is generated on lattice, improves the adsorption activity of hydrotalcite, functional absorption material is obtained, air bladder is then obtained into richness with water infusion
The infusion liquid of the collagen containing air bladder, then infusion liquid and konjak starch are blended, concentrated by rotary evaporation obtains concentrate, by concentrate and
Extruder grain after functionality absorption material mixing, then sorbing material is obtained through high temperature sintering, the present invention selects air bladder infusion liquid and evil spirit
Taro starch is as functional adhesive, and due to being rich in collagen in air bladder infusion liquid, konjak starch is easily gelatinized, the two conduct
After functionality is adsorbed material bonding by adhesive, during high-temperature calcination, collagen and starch can all degrade, wherein
Collagen degradation is amino acid, and starch degradation is glucose, and amino acid continues that material surface shape can be adsorbed in functionality after decomposing
Into hydrophilic amino and carboxyl, hydroxyl and aldehyde radical are generated after breakdown of glucose, hydrophilic amino and aldehyde radical can adsorb weight
Most of moisture around metal ion, makes heavy metal ion more thoroughly be exposed in waste water, carboxyl is sequestering at this time
It has an effect with the adsorptivity of hydroxyl and the absorption property of high water activity talcum, the heavy metal ion adsorbed and chela that will be exposed
It closes and locks, so as to complete the absorption to heavy metal ion, since the physical absorption of hydrotalcite is utilized in the adsorbent of the present invention
Activity, and include sequestering chemisorbed, therefore to the more secured of adsorption of metal ions, the absorption of sorbing material is stablized
Property is improved, and adsorption efficiency also significantly improves, and has broad application prospects.
Specific embodiment
It is 2 in mass ratio:1:5:5 will be fitted into after pig manure, dead leaves and bed-silt and water mixing in fermentation tank, seal
It after tank mouth, is left to ferment 15~20 days under conditions of being 25~30 DEG C in temperature, is separated by filtration to obtain fermentation filter after fermentation
Liquid；It is 5 in mass ratio:The aluminum nitrate solution that magnesium nitrate solution and mass fraction that mass fraction is 30% are 25% is mixed 10 by 4
~15min obtains mixed solution, is 17 in mass ratio by mixed solution and sodium hydroxide and potassium carbonate:1:It is obtained after 1 mixing
Pre-reaction liquid；Pre-reaction liquid is fitted into high pressure water heating kettle, then the sulphur cyanogen of pre-reaction liquid quality 1% is added in into high pressure water heating kettle
Change the ferment filtrate of potassium and pre-reaction liquid quality 10%, enclosed high pressure water heating kettle, it is heated to 150 under 1.2~1.4MPa~
It 160 DEG C, 30~34h of hydro-thermal reaction, treats to be separated by filtration to obtain filter residue after hydro-thermal reaction, up to functional absorption after drying
Material, it is spare；It weighs air bladder and is put into 20~30min of crushing in tissue pulverizer, air bladder crushed material is obtained, by air bladder crushed material and water
It is 1 in mass ratio:10 mixing, are heated to being boiling for 2~3h of infusion, obtain infusion liquid, infusion liquid and konjak starch are pressed
Mass ratio is 3:1 mixes and is fitted into ball grinder, 30~40min of ground and mixed；It is to be ground to obtain mixture after mixing,
Rotary Evaporators are filled this blend into, 15~20min of concentrated by rotary evaporation, obtains concentrate at 70~80 DEG C, by concentrate and standby
Functionality absorption material is 1 in mass ratio:Blank is obtained after 2 mixing；Blank is put into extruder grain in comminutor, control
Grain grain size is 5~6mm, then obtained particle is put into baking oven, dry 2~3h at 105~100 DEG C, and by dried
Grain is put into Muffle furnace, is first warming up to 500 DEG C of 20~30min of heat preservation sintering, then with the rate program of 8 DEG C/min with 5 DEG C/min
Rate be warming up to 1000~1200 DEG C continue heat preservation sintering 2~3h after, cooled to room temperature, discharge to get heavy metal from
Sub- sorbing material.
Example 1
It is 2 in mass ratio:1:5:5 will be fitted into after pig manure, dead leaves and bed-silt and water mixing in fermentation tank, seal tank mouth
Afterwards, it is left to ferment 15 days under conditions of being 25 DEG C in temperature, is separated by filtration to obtain ferment filtrate after fermentation；It is in mass ratio
5:4 the aluminum nitrate solution mixing 10min that magnesium nitrate solution and mass fraction that mass fraction is 30% are 25% is obtained mixing it is molten
Mixed solution and sodium hydroxide and potassium carbonate are 17 in mass ratio by liquid:1:Pre-reaction liquid is obtained after 1 mixing；By pre-reaction
Liquid is fitted into high pressure water heating kettle, then the potassium rhodanate of pre-reaction liquid quality 1% and pre-reaction liquid quality are added in into high pressure water heating kettle
10% ferment filtrate, enclosed high pressure water heating kettle are heated to 150 DEG C under 1.2MPa, and hydro-thermal reaction 30h treats hydro-thermal reaction
After be separated by filtration to obtain filter residue, expect after drying up to functional absorption, it is spare；It weighs air bladder and is put into powder in tissue pulverizer
Broken 20min obtains air bladder crushed material, is 1 in mass ratio by air bladder crushed material and water:10 mixing, are heated to being boiling for enduring
2h is boiled, obtains infusion liquid, is 3 in mass ratio by infusion liquid and konjak starch:1 mixes and is fitted into ball grinder, ground and mixed
30min；It is to be ground to obtain mixture after mixing, Rotary Evaporators are filled this blend into, the concentrated by rotary evaporation at 70 DEG C
15min obtains concentrate, is 1 in mass ratio by concentrate and spare functional absorption material:Blank is obtained after 2 mixing；By base
Material is put into extruder grain in comminutor, and control grain diameter is 5mm, then obtained particle is put into baking oven, dry at 105 DEG C
2h, and dried particle is put into Muffle furnace, 500 DEG C of heat preservation sinterings are first warming up to the rate program of 8 DEG C/min
20min, then with the rate of 5 DEG C/min be warming up to 1000 DEG C continue heat preservation sintering 2h after, cooled to room temperature, discharge to get
Heavy metal ion adsorbing material.
Example 2
It is 2 in mass ratio:1:5:5 will be fitted into after pig manure, dead leaves and bed-silt and water mixing in fermentation tank, seal tank mouth
Afterwards, it is left to ferment 18 days under conditions of being 28 DEG C in temperature, is separated by filtration to obtain ferment filtrate after fermentation；It is in mass ratio
5:4 the aluminum nitrate solution mixing 13min that magnesium nitrate solution and mass fraction that mass fraction is 30% are 25% is obtained mixing it is molten
Mixed solution and sodium hydroxide and potassium carbonate are 17 in mass ratio by liquid:1:Pre-reaction liquid is obtained after 1 mixing；By pre-reaction
Liquid is fitted into high pressure water heating kettle, then the potassium rhodanate of pre-reaction liquid quality 1% and pre-reaction liquid quality are added in into high pressure water heating kettle
10% ferment filtrate, enclosed high pressure water heating kettle are heated to 155 DEG C under 1.3MPa, and hydro-thermal reaction 32h treats hydro-thermal reaction
After be separated by filtration to obtain filter residue, expect after drying up to functional absorption, it is spare；It weighs air bladder and is put into powder in tissue pulverizer
Broken 25min obtains air bladder crushed material, is 1 in mass ratio by air bladder crushed material and water:10 mixing, are heated to being boiling for enduring
2h is boiled, obtains infusion liquid, is 3 in mass ratio by infusion liquid and konjak starch:1 mixes and is fitted into ball grinder, ground and mixed
35min；It is to be ground to obtain mixture after mixing, Rotary Evaporators are filled this blend into, the concentrated by rotary evaporation at 75 DEG C
18min obtains concentrate, is 1 in mass ratio by concentrate and spare functional absorption material:Blank is obtained after 2 mixing；By base
Material is put into extruder grain in comminutor, and control grain diameter is 5mm, then obtained particle is put into baking oven, dry at 108 DEG C
3h, and dried particle is put into Muffle furnace, 500 DEG C of heat preservation sinterings are first warming up to the rate program of 8 DEG C/min
25min, then with the rate of 5 DEG C/min be warming up to 1100 DEG C continue heat preservation sintering 2h after, cooled to room temperature, discharge to get
Heavy metal ion adsorbing material.
Example 3
It is 2 in mass ratio:1:5:5 will be fitted into after pig manure, dead leaves and bed-silt and water mixing in fermentation tank, seal tank mouth
Afterwards, it is left to ferment 20 days under conditions of being 30 DEG C in temperature, is separated by filtration to obtain ferment filtrate after fermentation；It is in mass ratio
5:4 the aluminum nitrate solution mixing 15min that magnesium nitrate solution and mass fraction that mass fraction is 30% are 25% is obtained mixing it is molten
Mixed solution and sodium hydroxide and potassium carbonate are 17 in mass ratio by liquid:1:Pre-reaction liquid is obtained after 1 mixing；By pre-reaction
Liquid is fitted into high pressure water heating kettle, then the potassium rhodanate of pre-reaction liquid quality 1% and pre-reaction liquid quality are added in into high pressure water heating kettle
10% ferment filtrate, enclosed high pressure water heating kettle are heated to 160 DEG C under 1.4MPa, and hydro-thermal reaction 34h treats hydro-thermal reaction
After be separated by filtration to obtain filter residue, expect after drying up to functional absorption, it is spare；It weighs air bladder and is put into powder in tissue pulverizer
Broken 30min obtains air bladder crushed material, is 1 in mass ratio by air bladder crushed material and water:10 mixing, are heated to being boiling for enduring
3h is boiled, obtains infusion liquid, is 3 in mass ratio by infusion liquid and konjak starch:1 mixes and is fitted into ball grinder, ground and mixed
40min；It is to be ground to obtain mixture after mixing, Rotary Evaporators are filled this blend into, the concentrated by rotary evaporation at 80 DEG C
20min obtains concentrate, is 1 in mass ratio by concentrate and spare functional absorption material:Blank is obtained after 2 mixing；By base
Material is put into extruder grain in comminutor, and control grain diameter is 6mm, then obtained particle is put into baking oven, dry at 100 DEG C
3h, and dried particle is put into Muffle furnace, 500 DEG C of heat preservation sinterings are first warming up to the rate program of 8 DEG C/min
30min, then with the rate of 5 DEG C/min be warming up to 1200 DEG C continue heat preservation sintering 3h after, cooled to room temperature, discharge to get
Heavy metal ion adsorbing material.
Comparative example
With the heavy metal ion adsorbing material of Changzhou company production as a comparison case to heavy metal ion produced by the present invention
Heavy metal ion adsorbing material in sorbing material and comparative example carries out performance detection, and testing result is as shown in table 1：1st, it tests
Method
Adsorption rate=（Metal ion initial concentration（mol/L）Concentration of metal ions after absorption（mol/L））The starting of/metal ion is dense
Degree（mol/L）.
Table 1
According to data in table 1 it is found that heavy metal ion adsorbing material produced by the present invention is high to the adsorption rate of heavy metal ion, inhale
Attached stability is good, has broad application prospects.
Claims (6)
1. a kind of preparation method of heavy metal ion adsorbing material, it is characterised in that specifically preparation process is：
（1）It is fitted into fermentation tank, after sealing tank mouth, is left to ferment, hair after pig manure, dead leaves and bed-silt and water are mixed
It is separated by filtration to obtain ferment filtrate after ferment；
（2）The aluminum nitrate solution that magnesium nitrate solution and mass fraction that mass fraction is 30% are 25% is mixed 10~15min to obtain
To mixed solution, pre-reaction liquid is obtained after mixed solution and sodium hydroxide and potassium carbonate are mixed；
（3）Pre-reaction liquid is fitted into high pressure water heating kettle, then potassium rhodanate and ferment filtrate are added in into high pressure water heating kettle, it is closed
High pressure water heating kettle is heated to 150~160 DEG C, 30~34h of hydro-thermal reaction, to the end of hydro-thermal reaction under 1.2~1.4MPa
After be separated by filtration to obtain filter residue, expect after drying up to functional absorption, it is spare；
（4）It weighs air bladder and crushes 20~30min, obtain air bladder crushed material, air bladder crushed material and water are mixed, be heated to boiling simultaneously
Continue 2~3h of infusion, obtain infusion liquid, infusion liquid and konjak starch are mixed and are fitted into ball grinder, ground and mixed 30~
40min；
（5）After treating above-mentioned ground and mixed, mixture is obtained, fills this blend into Rotary Evaporators, concentrated by rotary evaporation obtains dense
Contracting liquid will obtain blank after concentrate and spare functional absorption material mixing；
（6）Above-mentioned blank is put into extruder grain in comminutor, control grain diameter is 5~6mm, then obtained particle is put into
Baking oven, dry 2~3h at 105~100 DEG C, and dried particle is put into Muffle furnace, first with the rate journey of 8 DEG C/min
Sequence is warming up to 500 DEG C of 20~30min of heat preservation sintering, then is warming up to 1000~1200 DEG C with the rate of 5 DEG C/min and continues heat preservation burning
After 2~3h of knot, cooled to room temperature discharges to get heavy metal ion adsorbing material.
2. a kind of preparation method of heavy metal ion adsorbing material according to claim 1, it is characterised in that：Step（1）
Described in pig manure, dead leaves and bed-silt and water mass ratio be 2:1:5:5, standing for fermentation temperature is 25~30 DEG C,
The time of standing for fermentation is 15~20 days.
3. a kind of preparation method of heavy metal ion adsorbing material according to claim 1, it is characterised in that：Step（2）
Described in mass fraction be 30% magnesium nitrate solution and mass fraction be 25% the mass ratio of aluminum nitrate solution be 5:4, it mixes
It is 17 to close solution and the mass ratio of sodium hydroxide and potassium carbonate:1:1.
4. a kind of preparation method of heavy metal ion adsorbing material according to claim 1, it is characterised in that：Step（3）
Described in the addition of potassium rhodanate be the 1% of pre-reaction liquid quality, the addition of ferment filtrate is pre-reaction liquid quality
10%。
5. a kind of preparation method of heavy metal ion adsorbing material according to claim 1, it is characterised in that：Step（4）
Described in air bladder crushed material and water mass ratio be 1:10, the mass ratio of infusion liquid and konjak starch is 3:1.
6. a kind of preparation method of heavy metal ion adsorbing material according to claim 1, it is characterised in that：Step（5）
Described in concentrated by rotary evaporation temperature for 70~80 DEG C, time of concentrated by rotary evaporation is 15~20min, concentrate and functional is adsorbed
The mass ratio of material is 1:2.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1493393A (en) * | 2003-08-25 | 2004-05-05 | 浙江大学 | Adsorber for removing antiseptic byproduct in city water and its preparation and use method |
| CN103143325A (en) * | 2013-03-20 | 2013-06-12 | 沈阳化工大学 | Preparation method of glutamic acid intercalated layer hydrotalcite heavy-metal adsorbent |
| CN105664871A (en) * | 2016-03-24 | 2016-06-15 | 梅庆波 | Method for preparing formaldehyde adsorbent by using pineapple |
-
2017
- 2017-12-06 CN CN201711276784.0A patent/CN108144577A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1493393A (en) * | 2003-08-25 | 2004-05-05 | 浙江大学 | Adsorber for removing antiseptic byproduct in city water and its preparation and use method |
| CN103143325A (en) * | 2013-03-20 | 2013-06-12 | 沈阳化工大学 | Preparation method of glutamic acid intercalated layer hydrotalcite heavy-metal adsorbent |
| CN105664871A (en) * | 2016-03-24 | 2016-06-15 | 梅庆波 | Method for preparing formaldehyde adsorbent by using pineapple |
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Application publication date: 20180612 |