CN110038519A - A kind of processing method of acid waste water containing heavy metal - Google Patents
A kind of processing method of acid waste water containing heavy metal Download PDFInfo
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- CN110038519A CN110038519A CN201910358637.0A CN201910358637A CN110038519A CN 110038519 A CN110038519 A CN 110038519A CN 201910358637 A CN201910358637 A CN 201910358637A CN 110038519 A CN110038519 A CN 110038519A
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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
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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
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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Abstract
The present invention relates to a kind of processing methods of acid waste water containing heavy metal, the pH value of acid waste water is 1.0-3.5, the modified tree peony shell adsorbent material of iminodiacetic acid is added in acid waste water containing heavy metal, it is stirred under room temperature, carry out standing filtering after stir process, after separation of solid and liquid, supernatant reaches discharge standard, solid content nitric acid solution is eluted and is washed with deionized to neutrality, is reused after dry.Processing method of the invention has many advantages, such as at low cost, high-efficient, simple process, possesses preferable industrial applications prospect.
Description
Technical field
The present invention relates to technical field of waste water processing, and in particular to a kind of processing method of acid waste water containing heavy metal.
Background technique
Non-ferrous metal industry exploits in metal mine, it is lower that a large amount of pH can be generated during ore dressing and smelting etc. and containing weight
The acid waste water of metal.If not appropriately processed direct emission, it can not only corrode the bases such as sewer pipe, water conservancy project structure and set
Apply, heavy metal ion therein also can serious polluted surface water, underground water or soil, influence growth, the breeding of animals and plants, thus
Huge harm is caused to environmental quality and human health.Currently, processing acid waste water containing heavy metal method mainly has chemistry heavy
Shallow lake method, ion-exchange, membrane separation process, absorption method and artificial swamp method etc..Wherein, absorption method is because having wide adaptation range, behaviour
Make the features such as easy, processing capacity is big, gets more and more people's extensive concerning.One of an important factor for pH value is influence absorption property,
At the low ph, H3O+Adsorption site is fought for heavy metal ion, while hindering the dissociation of active group, causes adsorbance
It reduces.Therefore, absorption method is usually combined with neutralization precipitation method, to realize the row up to standard of acid waste water containing heavy metal processing
It puts.But this undoubtedly will increase processing cost, while a large amount of waste residues generated are also easy to cause secondary pollution to environment.
Summary of the invention
The purpose of the present invention is deficiencies to solve above-mentioned technical problem, provide a kind of processing of acid waste water containing heavy metal
Method.This method has many advantages, such as at low cost, high-efficient, simple process, possesses preferable industrial applications prospect.
The deficiency of the present invention to solve above-mentioned technical problem, used technical solution is: a kind of spent acidic containing heavy metal
The processing method of water, the pH value of acid waste water are 1.0-3.5, and the modified tree peony shell adsorbent material of iminodiacetic acid is added to containing weight
It in metal acid waste water, is stirred under room temperature, carries out standing filtering after stir process, after separation of solid and liquid, supernatant
Reach discharge standard, solid content nitric acid solution is eluted and is washed with deionized to neutrality, reuses after dry.
As a kind of advanced optimizing for processing method of acid waste water containing heavy metal of the invention: the adsorbent material adds
Entering amount is 0.2-2g/L.
As a kind of advanced optimizing for processing method of acid waste water containing heavy metal of the invention: when the stir process
Mixing speed is 100-160rpm, mixing time 1-3h.
As a kind of advanced optimizing for processing method of acid waste water containing heavy metal of the invention: the nitric acid solution it is dense
Degree is 0.1-1.0mol/L.
As a kind of advanced optimizing for processing method of acid waste water containing heavy metal of the invention: iminodiacetic acid is modified
Tree peony shell adsorbent material the preparation method is as follows: by tree peony shell crush after with sodium hydroxide, epoxychloropropane, ethyl alcohol and deionization
Water mixing, heating stirring reaction, the solid reacted is washed, it is dry after, the mixed of iminodiacetic acid and sodium carbonate is added
Heating stirring in solution is closed, after reaction, solid product is collected, obtains adsorbent material after washed, dry.
As a kind of advanced optimizing for processing method of acid waste water containing heavy metal of the invention: iminodiacetic acid is modified
The preparation method of tree peony shell adsorbent material is specific as follows:
A, after taking tree peony shell deionized water to impregnate, wash, being dry, with crusher machine sieving is crushed, sieve takes the powder of 35-24 mesh；
B, it takes step a to sieve the tree peony shell powder taken, mixes, be heated to sodium hydroxide, epoxychloropropane, ethyl alcohol and deionized water
35 DEG C are stirred to react, the solid obtained after reaction is washed, it is dry after it is spare；
C, the solid after taking step b dry is added in the mixed solution of iminodiacetic acid and sodium carbonate, is heated to 65 DEG C of progress
It is stirred to react, after reaction, collects solid product, the modified tree peony shell absorption of iminodiacetic acid is obtained after washed, dry
Material.
As a kind of advanced optimizing for processing method of acid waste water containing heavy metal of the invention: in the step b: every
In 100-300mL deionized water be added 2-10g tree peony shell powder, 12-50g sodium hydroxide, 30-100mL epoxychloropropane and
20-80mL ethyl alcohol.
As a kind of advanced optimizing for processing method of acid waste water containing heavy metal of the invention: the mixing of the step c
The concentration of iminodiacetic acid is 20-80g/L in solution, and the concentration of sodium carbonate is 20-60g/L.
As a kind of advanced optimizing for processing method of acid waste water containing heavy metal of the invention: the tree peony shell is Feng Dan
The seed shell of tree peony.
Beneficial effect
One, the present invention is using the modified tree peony shell adsorbent material of iminodiacetic acid to containing Cu2+、Pb2+And Cd2+The acid of heavy metal
Property waste water is handled, and after treatment, pH value of waste water can rise to 6.0-7.0 from original 1.0-3.5, heavy metal Cu2+、
Pb2+And Cd2+Removal rate reach 90.0% or more；
Two, the modified tree peony shell adsorbent material of the iminodiacetic acid that the present invention uses utilizes surface using discarded tree peony shell as raw material
Hydroxyl reactive group abundant passes sequentially through etherificate and amion acetic acidization reaction, is made a kind of and contains chelation group-N
(CH2COO-)2, and the heavy-metal adsorption material that specific surface area is larger, pore structure is flourishing, the adsorbent material is to containing heavy metal acid
Property waste water have good treatment effect；
Three, the present invention takes lower epoxidation reaction temperature (35 DEG C) in the preparation process of adsorbent material, preferable to protect
Aromatic structure abundant in tree peony husk as raw material is stayed.Under strongly acidic conditions, the surface protonated delocalizedπelectron of adsorbent material with again
Complex compound is formd between metal ion.Also, as pH value of waste water increases, the active group-N (CH on surface2COO-)2With again
Chelate is further defined between metal ion.Therefore, adsorbent material prepared by the present invention under strongly acidic conditions, is still able to maintain
Preferable adsorption effect；
Four, the adsorbent material that uses of the present invention is modified using tree peony shell as raw material, modified tree peony shell surface isoelectric point by
5.8 rise to 8.9, have stronger alkalinity, can neutralize the acid in effluent part.In addition, sodium ion existing for tree peony shell surface, with
There is also ion exchanges between hydrogen ion in acid waste water, thus useless using the modified adsorbent material processing of the present invention
After water, the pH value of waste water has raising by a relatively large margin, substantially close to neutrality.
Detailed description of the invention
Fig. 1 is the scanning electron microscope (SEM) photograph of tree peony husk as raw material in embodiment 1；
Fig. 2 is the scanning electron microscope (SEM) photograph that adsorbent material is made in embodiment 1；
Fig. 3 is the infrared spectrogram of tree peony husk as raw material and obtained adsorbent material in embodiment 1.
Specific embodiment
Further technical solution of the present invention is illustrated below in conjunction with specific embodiment.
Embodiment 1
A kind of processing method of acid waste water containing heavy metal, Cu in the acid waste water of processing2+、Pb2+And Cd2+Concentration is respectively
20g/L, 15g/L and 10g/L, acid waste water pH value be 2.0, the amount of acid waste water is 50L, when processing, is added into waste water
10g adsorbent material stirs 1h, speed of agitator 100rpm under room temperature.After standing filtering, solid content and filtrate are obtained respectively.
Solid content is eluted with 0.1mol/L nitric acid solution and is washed with deionized to neutrality, reusable after dry.Filtrate is used
ICP-MS measures concentration of heavy metal ion, calculates and knows Cu2+、Pb2+And Cd2+Removal rate be respectively 97.3%, 95.8% and
93.9%。
The modified tree peony shell adsorbent material of iminodiacetic acid the preparation method comprises the following steps: by the 50g tree peony shell (seed of phoenix pellet tree peony
Shell) it is added in three-necked bottle, 300g sodium hydroxide is added, 750mL epoxychloropropane, 500mL dehydrated alcohol and 2500mL are gone
Ionized water, after being heated to 35 DEG C, mechanical stirring 6h.Product is washed through deionized water to neutrality, after 60 DEG C of vacuum drying 12h, is added
Enter into the mixed solution of 20.0g/L iminodiacetic acid and 20.0g/L sodium carbonate.After being heated to 65 DEG C, it is stirred to react 8h.It is cold
But solid product is collected afterwards, and is washed with deionized to neutrality, obtains adsorbent material after 60 DEG C of vacuum drying 12h.
Electronic Speculum processing is scanned to tree peony husk as raw material and adsorbent material obtained, from figure 1 it appears that tree peony shell
(PSC) the fine and close layer structure stacked, only a small amount of hole is presented in surface.It compares, adsorbent material (IDA- in Fig. 2
PSC) then there are a large amount of deeper ducts in surface, and the fold of inner wall protrusion is high-visible, provides advantageous item for absorption
Part.
Infrared spectrum analysis is carried out to tree peony husk as raw material and adsorbent material obtained, from figure 3, it can be seen that tree peony shell
(PSC) 1619cm in-1Place is-COO-Middle C=O asymmetric stretching vibration peak, modified blue shift 16cm-1And the intensity of absorption peak
It significantly increases and 1412cm-1The appearance for locating C=O symmetrical stretching vibration peak in carboxyl, illustrates the surface adsorbent material (IDA-PSC)
On have the formation of carboxylate.1117cm-1Place is the stretching vibration peak of C-O-C in aromatic ester, and modified vibration is reinforced, with tertiary amine groups
Introduce related, these sufficiently show that iminodiacetic acid is successfully connected to tree peony shell surface.
Embodiment 2
A kind of processing method of acid waste water containing heavy metal, Cu in the acid waste water of processing2+、Pb2+And Cd2+Concentration is respectively
50g/L, 40g/L and 30g/L, acid waste water pH value be 2.5, the amount of acid waste water is 20L, when processing, is added into waste water
20g adsorbent material stirs 1.5h, speed of agitator 120rpm under room temperature.After standing filtering, solid content and filter are obtained respectively
Liquid.Solid content is eluted with 0.5mol/L nitric acid solution and is washed with deionized to neutrality, reusable after dry.Filtrate is used
ICP-MS measures concentration of heavy metal ion, calculates and knows Cu2+、Pb2+And Cd2+Removal rate be respectively 95.3%, 93.8% and
92.9%。
The modified tree peony shell adsorbent material of iminodiacetic acid the preparation method comprises the following steps: by the 50g tree peony shell (seed of phoenix pellet tree peony
Shell) it is added in three-necked bottle, 400g sodium hydroxide is added, 800mL epoxychloropropane, 600mL dehydrated alcohol and 2000mL are gone
Ionized water, after being heated to 35 DEG C, mechanical stirring 6h.Product is washed through deionized water to neutrality, after 60 DEG C of vacuum drying 12h, is added
Enter into the mixed solution of 40.0g/L iminodiacetic acid and 30.0g/L sodium carbonate.After being heated to 65 DEG C, it is stirred to react 16h.
Solid product is collected after cooling, and is washed with deionized to neutrality, obtains adsorbent material after 60 DEG C of vacuum drying 12h.
Embodiment 3:
A kind of processing method of acid waste water containing heavy metal, Cu in the acid waste water of processing2+、Pb2+And Cd2+Concentration is respectively
100g/L, 80g/L and 60g/L, acid waste water pH value be 3.5, the amount of acid waste water is 10L, when processing, is added into waste water
20g adsorbent material stirs 3h, speed of agitator 160rpm under room temperature.After standing filtering, solid content and filtrate are obtained respectively.
Solid content is eluted with 1.0mol/L nitric acid solution and is washed with deionized to neutrality, reusable after dry.Filtrate is used
ICP-MS measures concentration of heavy metal ion, calculates and knows Cu2+、Pb2+And Cd2+Removal rate be respectively 91.3%, 90.8% and
90.1%。
The modified tree peony shell adsorbent material of iminodiacetic acid the preparation method comprises the following steps: by the 100g tree peony shell (seed of phoenix pellet tree peony
Shell) it is added in three-necked bottle, 500g sodium hydroxide is added, 1000mL epoxychloropropane, 800mL dehydrated alcohol and 3000mL are gone
Ionized water, after being heated to 35 DEG C, mechanical stirring 6h.Product is washed through deionized water to neutrality, after 60 DEG C of vacuum drying 12h, is added
Enter into the mixed solution of 80.0g/L iminodiacetic acid and 60.0g/L sodium carbonate.After being heated to 65 DEG C, it is stirred to react for 24 hours.
Solid product is collected after cooling, and is washed with deionized to neutrality, obtains adsorbent material after 60 DEG C of vacuum drying 12h.
Embodiment 4:
A kind of processing method of acid waste water containing heavy metal, Cu in the acid waste water of processing2+、Pb2+And Cd2+Concentration is respectively
100g/L, 80g/L and 60g/L, acid waste water pH value be 1.0, the amount of acid waste water is 10L, when processing, is added into waste water
20g adsorbent material (adsorbent material is the adsorbent material being prepared in embodiment 1), stirs 3h, speed of agitator under room temperature
For 160rpm.After standing filtering, solid content and filtrate are obtained respectively.Solid content eluted with 1.0mol/L nitric acid solution and spend from
Sub- water washing is reusable after dry to neutrality.Filtrate measures concentration of heavy metal ion with ICP-MS, calculates and knows Cu2+、
Pb2+And Cd2+Removal rate be respectively 90.9%, 90.3% and 90.0%.
Embodiment 5:
A kind of processing method of acid waste water containing heavy metal, Cu in the acid waste water of processing2+、Pb2+And Cd2+Concentration is respectively
20g/L, 15g/L and 10g/L, acid waste water pH value be 2.0, the amount of acid waste water is 50L, when processing, is added into waste water
10g adsorbent material stirs 1h, speed of agitator 100rpm under room temperature.After standing filtering, solid content and filtrate are obtained respectively.
Solid content is eluted with 0.1mol/L nitric acid solution and is washed with deionized to neutrality, reusable after dry.Filtrate is used
ICP-MS measures concentration of heavy metal ion, calculates and knows Cu2+、Pb2+And Cd2+Removal rate be respectively 76.3%, 70.8% and
66.9%。
The modified tree peony shell adsorbent material of iminodiacetic acid the preparation method comprises the following steps: 50g tree peony shell is added in three-necked bottle,
300g sodium hydroxide is added, 750mL epoxychloropropane, 500mL dehydrated alcohol and 2500mL deionized water are heated to 75 DEG C
Afterwards, mechanical stirring 6h.Product is washed through deionized water to neutrality, after 60 DEG C of vacuum drying 12h, is added to 20.0g/L imino group
In the mixed solution of oxalic acid and 20.0g/L sodium carbonate.After being heated to 65 DEG C, it is stirred to react 8h.Solid product is collected after cooling,
And be washed with deionized to neutrality, adsorbent material is obtained after 60 DEG C of vacuum drying 12h.
Embodiment 6:
A kind of processing method of acid waste water containing heavy metal, Cu in the acid waste water of processing2+、Pb2+And Cd2+Concentration is respectively
20g/L, 15g/L and 10g/L, acid waste water pH value be 2.0, the amount of acid waste water is 50L, when processing, is added into waste water
10g adsorbent material stirs 1h, speed of agitator 100rpm under room temperature.After standing filtering, solid content and filtrate are obtained respectively.
Solid content is eluted with 0.1mol/L nitric acid solution and is washed with deionized to neutrality, reusable after dry.Filtrate is used
ICP-MS measures concentration of heavy metal ion, calculates and knows Cu2+、Pb2+And Cd2+Removal rate be respectively 58.2%, 40.1% and
39.6%。
The modified tree peony shell adsorbent material of iminodiacetic acid the preparation method comprises the following steps: 50g tree peony shell is added in three-necked bottle,
300g sodium hydroxide is added, 750mL epoxychloropropane, 500mL dehydrated alcohol and 2500mL deionized water are heated to 100 DEG C
Afterwards, mechanical stirring 6h.Product is washed through deionized water to neutrality, after 60 DEG C of vacuum drying 12h, is added to 20.0g/L imino group
In the mixed solution of oxalic acid and 20.0g/L sodium carbonate.After being heated to 65 DEG C, it is stirred to react 8h.Solid product is collected after cooling,
And be washed with deionized to neutrality, adsorbent material is obtained after 60 DEG C of vacuum drying 12h.
Embodiment 7
A kind of processing method of acid waste water containing heavy metal, Cu in the acid waste water of processing2+、Pb2+And Cd2+Concentration is respectively
20g/L, 15g/L and 10g/L, acid waste water pH value be 2.0, the amount of acid waste water is 50L, when processing, is added into waste water
10g adsorbent material stirs 1h, speed of agitator 100rpm under room temperature.After standing filtering, solid content and filtrate are obtained respectively.
Solid content is eluted with 0.1mol/L nitric acid solution and is washed with deionized to neutrality, reusable after dry.Filtrate is used
ICP-MS measures concentration of heavy metal ion, calculates and knows Cu2+、Pb2+And Cd2+Removal rate be respectively 94.5%, 92.9% and
91.8%。
The modified tree peony shell adsorbent material of iminodiacetic acid the preparation method comprises the following steps: by the 50g tree peony shell (seed of Shandong pink peony
Shell) it is added in three-necked bottle, 300g sodium hydroxide is added, 750mL epoxychloropropane, 500mL dehydrated alcohol and 2500mL are gone
Ionized water, after being heated to 35 DEG C, mechanical stirring 6h.Product is washed through deionized water to neutrality, after 60 DEG C of vacuum drying 12h, is added
Enter into the mixed solution of 20.0g/L iminodiacetic acid and 20.0g/L sodium carbonate.After being heated to 65 DEG C, it is stirred to react 8h.It is cold
But solid product is collected afterwards, and is washed with deionized to neutrality, obtains adsorbent material after 60 DEG C of vacuum drying 12h.
Embodiment 8
A kind of processing method of acid waste water containing heavy metal, Cu in the acid waste water of processing2+、Pb2+And Cd2+Concentration is respectively
20g/L, 15g/L and 10g/L, acid waste water pH value be 2.0, the amount of acid waste water is 50L, when processing, is added into waste water
10g adsorbent material stirs 1h, speed of agitator 100rpm under room temperature.After standing filtering, solid content and filtrate are obtained respectively.
Solid content is eluted with 0.1mol/L nitric acid solution and is washed with deionized to neutrality, reusable after dry.Filtrate is used
ICP-MS measures concentration of heavy metal ion, calculates and knows Cu2+、Pb2+And Cd2+Removal rate be respectively 94.2%, 92.1% and
91.3%。
The modified tree peony shell adsorbent material of iminodiacetic acid the preparation method comprises the following steps: by the 50g tree peony shell (seed of chrysanthemum certain herbaceous plants with big flowers tree peony
Shell) it is added in three-necked bottle, 300g sodium hydroxide is added, 750mL epoxychloropropane, 500mL dehydrated alcohol and 2500mL are gone
Ionized water, after being heated to 35 DEG C, mechanical stirring 6h.Product is washed through deionized water to neutrality, after 60 DEG C of vacuum drying 12h, is added
Enter into the mixed solution of 20.0g/L iminodiacetic acid and 20.0g/L sodium carbonate.After being heated to 65 DEG C, it is stirred to react 8h.It is cold
But solid product is collected afterwards, and is washed with deionized to neutrality, obtains adsorbent material after 60 DEG C of vacuum drying 12h.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make out a little change or repair
Decorations are the equivalent embodiment of equivalent variations, but without departing from the technical solutions of the present invention, according to the technical essence of the invention
Any simple modification, equivalent change and modification to the above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (9)
1. a kind of processing method of acid waste water containing heavy metal, the pH value of acid waste water is 1.0-3.5, it is characterised in that: will be sub-
The modified tree peony shell adsorbent material of aminodiacetic acid adds in acid waste water containing heavy metal, is stirred, stirs under room temperature
Carry out standing filtering after processing, after separation of solid and liquid, supernatant reaches discharge standard, solid content nitric acid solution elute and spend from
Sub- water washing is reused after dry to neutrality.
2. a kind of processing method of acid waste water containing heavy metal as described in claim 1, it is characterised in that: the adsorbent material
Additional amount is 0.2-2g/L.
3. a kind of processing method of acid waste water containing heavy metal as described in claim 1, it is characterised in that: when the stir process
Mixing speed be 100-160rpm, mixing time 1-3h.
4. a kind of processing method of acid waste water containing heavy metal as described in claim 1, it is characterised in that: the nitric acid solution
Concentration is 0.1-1.0 mol/L.
5. a kind of processing method of acid waste water containing heavy metal as described in claim 1, it is characterised in that: iminodiacetic acid changes
Property tree peony shell adsorbent material the preparation method is as follows: by tree peony shell crush after with sodium hydroxide, epoxychloropropane, ethyl alcohol and go from
The mixing of sub- water, heating stirring reaction, the solid reacted is washed, it is dry after, iminodiacetic acid and sodium carbonate is added
Heating stirring in mixed solution collects solid product, obtains adsorbent material after washed, dry after reaction.
6. a kind of processing method of acid waste water containing heavy metal as claimed in claim 5, it is characterised in that: preparation method is specifically such as
Under:
A, after taking tree peony shell deionized water to impregnate, wash, being dry, with crusher machine sieving is crushed, sieve takes the powder of 35-24 mesh；
B, it takes step a to sieve the tree peony shell powder taken, mixes, be heated to sodium hydroxide, epoxychloropropane, ethyl alcohol and deionized water
35 DEG C are stirred to react, the solid obtained after reaction is washed, it is dry after it is spare；
C, the solid after taking step b dry is added in the mixed solution of iminodiacetic acid and sodium carbonate, is heated to 65 DEG C of progress
It is stirred to react, after reaction, collects solid product, the modified tree peony shell absorption of iminodiacetic acid is obtained after washed, dry
Material.
7. a kind of processing method of acid waste water containing heavy metal as claimed in claim 6, it is characterised in that: in the step b: every
In 100-300mL deionized water be added 2-10g tree peony shell powder, 12-50g sodium hydroxide, 30-100mL epoxychloropropane and
20-80mL ethyl alcohol.
8. a kind of processing method of acid waste water containing heavy metal as claimed in claim 6, it is characterised in that: the step c's is mixed
The concentration for closing iminodiacetic acid in solution is 20-80g/L, and the concentration of sodium carbonate is 20-60g/L.
9. the processing method of acid waste water containing heavy metal as described in any claim in claim 5-8, it is characterised in that: institute
State the seed shell that tree peony shell is phoenix pellet tree peony.
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