CN109293053A - A kind of chelating precipitation method removing heavy metals in industrial wastewater - Google Patents
A kind of chelating precipitation method removing heavy metals in industrial wastewater Download PDFInfo
- Publication number
- CN109293053A CN109293053A CN201811243313.4A CN201811243313A CN109293053A CN 109293053 A CN109293053 A CN 109293053A CN 201811243313 A CN201811243313 A CN 201811243313A CN 109293053 A CN109293053 A CN 109293053A
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- Prior art keywords
- industrial wastewater
- chelating
- chelating agent
- pond
- heavy metals
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Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
-
- 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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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 present invention relates to environmental protection technical fields, and disclose a kind of chelating precipitation method for removing heavy metals in industrial wastewater, industrial wastewater is transported in filtering ponds, filtering ponds are internally provided with active carbon, the large particulate matter in industrial wastewater is adsorbed using active carbon, it will be transported in centrifugal type filter by the filtered industrial wastewater of activated carbon adsorption, so that the particulate matter of small volume and liquid separate, it will be in the pond of chelating agent merging S3, Cu in chelating agent and waste water, Zn, Hg, Cd, Pb, Mn, Ni, the contents of many kinds of heavy metal ion such as Cr are reacted rapidly, generating chelating salt not soluble in water, processing method is relatively easy, it can heavy-metal ion removal as long as adding a small amount of chelating agent, chelating agent can be chelated with heavy metal ion strength, go removing heavy metals effect preferable, chelating agent with Heavy metal ion can generate good floccule body, and flocculation sedimentation effect is good, and not only sludge quantity is few but also easy dehydration for method provided by the invention.
Description
Technical field
The present invention relates to environmental protection technical field, specially a kind of chelating precipitation side for removing heavy metals in industrial wastewater
Method.
Background technique
Heavy metal chelating agent can generate the metallo-chelate for stablizing and being insoluble in water in conjunction with heavy metal ion.Heavy metal
Trapping agent has processing method simple, and expense is low, can accomplish in the case that contents of many kinds of heavy metal ion coexists after single treatment
Meet the requirement of environmental protection can play one's part to the full salt coexists with complex salt to heavy metal in waste water, and have floccule body thick
Greatly, precipitating is fast, be dehydrated fast, easy post-processing, sludge quantity is few and it is nontoxic to stablize, does not have the features such as secondary pollution.To overcome
The deficiency of traditional chemical facture provides convenience, waste water especially low to heavy metal in waste water content, place for subsequent processing
Reason expense is relatively low, there is good application prospect.People are to high molecular heavy metals trapping agent in terms of wastewater treatment in recent years
Research attach great importance to.
Chemical precipitation method is most widely used in removal heavy metal in waste water, principle is to make to give up by chemical reaction
It is changed into heavy metal compound not soluble in water in the heavy metal of dissolved state in water, makes to precipitate by the methods of filtering and precipitating
Object is removed from aqueous solution.As heavy metal wastewater thereby ingredient is increasingly sophisticated, discharge of wastewater requires gradually to tend to stringent, due to by heavy
The influence of shallow lake agent and environmental condition, China is mostly had been unable to meet using the heavy metal wastewater thereby of traditional neutralization precipitation method processing at present
Discharge of wastewater requires to be for further processing.In addition, the sediment generated must be handled and be disposed well, it otherwise will cause two
Secondary pollution, and traditional chemical precipitation method generally requires to add a large amount of settling agent and cause sludge quantity more, and sludge
It is not easy to be dehydrated, or even is sticked on filter cloth or strainer and may cause blocking.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of chelating precipitation sides for removing heavy metals in industrial wastewater
Method, have processing method is relatively easy, go removing heavy metals effect preferably, flocculation sedimentation effect is good and sludge quantity is few and easy takes off
The advantages that water, solves the problems, such as that the prior art goes removing heavy metals complex process and effect is low.
(2) technical solution
For realize above-mentioned processing method is relatively easy, go removing heavy metals effect preferably, flocculation sedimentation effect is good and sludge quantity
Less and it is easy dehydration purpose, the invention provides the following technical scheme: a kind of chelating precipitation for removing heavy metals in industrial wastewater
Method, comprising the following steps:
S1, industrial wastewater is transported in filtering ponds, filtering ponds are internally provided with active carbon, using active carbon to Industry Waste
Large particulate matter in water is adsorbed, and is recycled 2-4 times；
S2, it will be transported in centrifugal type filter by the filtered industrial wastewater of activated carbon adsorption, so that volume
Lesser particulate matter and liquid separate, and recycle 1-3 times；
S3, it will be focused in the not pond of sundries by the filtered industrial wastewater of centrifugal type filter, it is to be processed；
S4, prepare reaction kettle for synthesizing the high-molecular chelating agent containing dithiocarbamate-based group；
S5, it will chemically react, controlled in reaction kettle in aq. polyethyleneimine and carbon disulfide merging reaction kettle
Temperature be 28-32 DEG C；
S6, polyethyleneimine have alkyl, amino, acyl group or the hydroxy alkyl of nitrogenous sub-stituent, in reaction process, two sulphur
Change the reactive hydrogen in carbon displacement polyamine molecule nitrogen, generates aminodithioformic acid or its salt, this is chelating agent；
S7, chelating agent is placed in the pond of S3, chelating agent and Cu, Zn, Hg, Cd, Pb, Mn, Ni, Cr in waste water etc. are a variety of
Heavy metal ion is reacted rapidly, and chelating salt not soluble in water is being generated；
S8, organic flocculant and inorganic flocculating agent being added in pond, stirring 1-3min, it is cotton-shaped heavy to be formed in pond
It forms sediment, achievees the purpose that heavy metal ion in water removal.
The technical program is advanced optimized, the concentration of aq. polyethyleneimine is 30% in the S5.
The technical program is advanced optimized, the organic flocculant and inorganic flocculating agent in the S8 are respectively polyethyleneimine
With 12 hydrazine aluminum sulfate potassium.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of chelating precipitation method for removing heavy metals in industrial wastewater, tools
It is standby following the utility model has the advantages that processing method is relatively easy, as long as add a small amount of chelating agent can heavy-metal ion removal, and be not required to
Increase cost of equipment, chelating agent can be chelated with heavy metal ion strength, go removing heavy metals effect preferable, chelating agent and heavy metal
Ion can generate good floccule body, and flocculation sedimentation effect is good, add compared to traditional chemical precipitation method needs and largely help
Heavy agent and cause sludge quantity more, and sludge is not easy to be dehydrated, or even is sticked on filter cloth or strainer and may cause blocking, of the invention
Not only sludge quantity is few but also easy dehydration for the method for offer.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment one:
A kind of chelating precipitation method removing heavy metals in industrial wastewater, comprising the following steps:
S1, industrial wastewater is transported in filtering ponds, filtering ponds are internally provided with active carbon, using active carbon to Industry Waste
Large particulate matter in water is adsorbed, and is recycled 2 times；
S2, it will be transported in centrifugal type filter by the filtered industrial wastewater of activated carbon adsorption, so that volume
Lesser particulate matter and liquid separate, and recycle 1 time；
S3, it will be focused in the not pond of sundries by the filtered industrial wastewater of centrifugal type filter, it is to be processed；
S4, prepare reaction kettle for synthesizing the high-molecular chelating agent containing dithiocarbamate-based group；
S5, it will be chemically reacted in aq. polyethyleneimine and carbon disulfide merging reaction kettle, polyethyleneimine aqueous amine
The concentration of solution is 30%, and controlling the temperature in reaction kettle is 28 DEG C；
S6, polyethyleneimine have alkyl, amino, acyl group or the hydroxy alkyl of nitrogenous sub-stituent, in reaction process, two sulphur
Change the reactive hydrogen in carbon displacement polyamine molecule nitrogen, generates aminodithioformic acid or its salt, this is chelating agent；
S7, chelating agent is placed in the pond of S3, chelating agent and Cu, Zn, Hg, Cd, Pb, Mn, Ni, Cr in waste water etc. are a variety of
Heavy metal ion is reacted rapidly, and chelating salt not soluble in water is being generated；
S8, organic flocculant and inorganic flocculating agent are added in pond, organic flocculant and inorganic flocculating agent are respectively
Polyethyleneimine and 12 hydrazine aluminum sulfate potassium, stir 1min, form flocculent deposit in pond, reach in water removal heavy metal from
The purpose of son.
Embodiment two:
S1, industrial wastewater is transported in filtering ponds, filtering ponds are internally provided with active carbon, using active carbon to Industry Waste
Large particulate matter in water is adsorbed, and is recycled 3 times；
S2, it will be transported in centrifugal type filter by the filtered industrial wastewater of activated carbon adsorption, so that volume
Lesser particulate matter and liquid separate, and recycle 2 times；
S3, it will be focused in the not pond of sundries by the filtered industrial wastewater of centrifugal type filter, it is to be processed；
S4, prepare reaction kettle for synthesizing the high-molecular chelating agent containing dithiocarbamate-based group；
S5, it will be chemically reacted in aq. polyethyleneimine and carbon disulfide merging reaction kettle, polyethyleneimine aqueous amine
The concentration of solution is 30%, and controlling the temperature in reaction kettle is 30 DEG C；
S6, polyethyleneimine have alkyl, amino, acyl group or the hydroxy alkyl of nitrogenous sub-stituent, in reaction process, two sulphur
Change the reactive hydrogen in carbon displacement polyamine molecule nitrogen, generates aminodithioformic acid or its salt, this is chelating agent；
S7, chelating agent is placed in the pond of S3, chelating agent and Cu, Zn, Hg, Cd, Pb, Mn, Ni, Cr in waste water etc. are a variety of
Heavy metal ion is reacted rapidly, and chelating salt not soluble in water is being generated；
S8, organic flocculant and inorganic flocculating agent are added in pond, organic flocculant and inorganic flocculating agent are respectively
Polyethyleneimine and 12 hydrazine aluminum sulfate potassium, stir 2min, form flocculent deposit in pond, reach in water removal heavy metal from
The purpose of son.
Embodiment three:
S1, industrial wastewater is transported in filtering ponds, filtering ponds are internally provided with active carbon, using active carbon to Industry Waste
Large particulate matter in water is adsorbed, and is recycled 4 times；
S2, it will be transported in centrifugal type filter by the filtered industrial wastewater of activated carbon adsorption, so that volume
Lesser particulate matter and liquid separate, and recycle 3 times；
S3, it will be focused in the not pond of sundries by the filtered industrial wastewater of centrifugal type filter, it is to be processed；
S4, prepare reaction kettle for synthesizing the high-molecular chelating agent containing dithiocarbamate-based group；
S5, it will be chemically reacted in aq. polyethyleneimine and carbon disulfide merging reaction kettle, polyethyleneimine aqueous amine
The concentration of solution is 30%, and controlling the temperature in reaction kettle is 32 DEG C；
S6, polyethyleneimine have alkyl, amino, acyl group or the hydroxy alkyl of nitrogenous sub-stituent, in reaction process, two sulphur
Change the reactive hydrogen in carbon displacement polyamine molecule nitrogen, generates aminodithioformic acid or its salt, this is chelating agent；
S7, chelating agent is placed in the pond of S3, chelating agent and Cu, Zn, Hg, Cd, Pb, Mn, Ni, Cr in waste water etc. are a variety of
Heavy metal ion is reacted rapidly, and chelating salt not soluble in water is being generated；
S8, organic flocculant and inorganic flocculating agent are added in pond, organic flocculant and inorganic flocculating agent are respectively
Polyethyleneimine and 12 hydrazine aluminum sulfate potassium, stir 3min, form flocculent deposit in pond, reach in water removal heavy metal from
The purpose of son.
Working principle: macromolecule trapping precipitant is a kind of chelating resin of liquid, and 100% stoste is brownish red transparent liquid
Body, relative density are greater than 1.26, pH value 11.0-12.0, viscosity 80-100Pas, it is by multiple dithiocarbamates first
High molecular polymer of the hydrochlorate as chelation group, can infinitely be dissolved in water, it contains a large amount of polar group, the sulphur in polar group
Atomic radius is bigger and negatively charged, and easily polarization deforms and generates negative electric field, it can capture cation and tend to bonding in turn
Slightly solubility Aminodithioformate is generated, Aminodithioformate a portion of generation is ionic bond or highly polar
Key, most of then be coordinate bond, the coordination valence base stage of same metal ion-chelant may be from different macromolecule trapping precipitant point
Son, the molecule of the Aminodithioformate generated in this way can be stereochemical structure, high crosslinking, and such metal salt is once in water
Middle generation just has good flocculating setting effect.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (3)
1. a kind of chelating precipitation method for removing heavy metals in industrial wastewater, which comprises the following steps:
S1, industrial wastewater is transported in filtering ponds, filtering ponds are internally provided with active carbon, using active carbon in industrial wastewater
Large particulate matter adsorbed, recycle 2-4 times；
S2, it will be transported in centrifugal type filter by the filtered industrial wastewater of activated carbon adsorption, so that small volume
Particulate matter and liquid separate, recycle 1-3 times；
S3, it will be focused in the not pond of sundries by the filtered industrial wastewater of centrifugal type filter, it is to be processed；
S4, prepare reaction kettle for synthesizing the high-molecular chelating agent containing dithiocarbamate-based group；
S5, it will be chemically reacted in aq. polyethyleneimine and carbon disulfide merging reaction kettle, control the temperature in reaction kettle
Degree is 28-32 DEG C；
S6, polyethyleneimine have alkyl, amino, acyl group or the hydroxy alkyl of nitrogenous sub-stituent, in reaction process, carbon disulfide
The reactive hydrogen in polyamine molecule nitrogen is replaced, generates aminodithioformic acid or its salt, this is chelating agent；
S7, chelating agent is placed in the pond of S3, a variety of huge sum of moneys such as Cu, Zn, Hg, Cd, Pb, Mn, Ni, Cr in chelating agent and waste water
Belong to ion to react rapidly, generates chelating salt not soluble in water；
S8, organic flocculant and inorganic flocculating agent are added in pond, stir 1-3min, form flocculent deposit in pond, reach
To the purpose for going heavy metal ion in water removal.
2. a kind of chelating precipitation method for removing heavy metals in industrial wastewater according to claim 1, which is characterized in that institute
The concentration for stating aq. polyethyleneimine in S5 is 30%.
3. a kind of chelating precipitation method for removing heavy metals in industrial wastewater according to claim 1, which is characterized in that institute
Stating organic flocculant and inorganic flocculating agent in S8 is respectively polyethyleneimine and 12 hydrazine aluminum sulfate potassium.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811243313.4A CN109293053A (en) | 2018-10-24 | 2018-10-24 | A kind of chelating precipitation method removing heavy metals in industrial wastewater |
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| CN201811243313.4A CN109293053A (en) | 2018-10-24 | 2018-10-24 | A kind of chelating precipitation method removing heavy metals in industrial wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112321018A (en) * | 2020-10-29 | 2021-02-05 | 新晃鲁湘钡业有限公司 | Treatment method of mercury-containing wastewater |
| CN112811546A (en) * | 2021-01-19 | 2021-05-18 | 西南科技大学 | Method for treating heavy metal ions in wastewater |
| CN115159743A (en) * | 2022-07-15 | 2022-10-11 | 张彧 | Control method of cleaning equipment and related device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631940A (en) * | 2004-11-12 | 2005-06-29 | 清华大学 | Macromolecular heavy metal chelating agent for stabilization of dangerous waste materials and method for preparing same |
| CN102190392A (en) * | 2010-03-12 | 2011-09-21 | 上海瑞勇实业有限公司 | RO dense water standard discharge technology in reclaimed water reuse |
| CN104610972A (en) * | 2014-12-18 | 2015-05-13 | 淄博金鼎光电科技有限公司 | Heavy metal polluted soil treatment processing agent and preparation method thereof |
| CN105084603A (en) * | 2015-09-09 | 2015-11-25 | 杭州太一科技有限公司 | Treatment method and system of nickel-containing wastewater conforming to Water Pollutant Table III Discharge Standard |
-
2018
- 2018-10-24 CN CN201811243313.4A patent/CN109293053A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631940A (en) * | 2004-11-12 | 2005-06-29 | 清华大学 | Macromolecular heavy metal chelating agent for stabilization of dangerous waste materials and method for preparing same |
| CN102190392A (en) * | 2010-03-12 | 2011-09-21 | 上海瑞勇实业有限公司 | RO dense water standard discharge technology in reclaimed water reuse |
| CN104610972A (en) * | 2014-12-18 | 2015-05-13 | 淄博金鼎光电科技有限公司 | Heavy metal polluted soil treatment processing agent and preparation method thereof |
| CN105084603A (en) * | 2015-09-09 | 2015-11-25 | 杭州太一科技有限公司 | Treatment method and system of nickel-containing wastewater conforming to Water Pollutant Table III Discharge Standard |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112321018A (en) * | 2020-10-29 | 2021-02-05 | 新晃鲁湘钡业有限公司 | Treatment method of mercury-containing wastewater |
| CN112811546A (en) * | 2021-01-19 | 2021-05-18 | 西南科技大学 | Method for treating heavy metal ions in wastewater |
| CN115159743A (en) * | 2022-07-15 | 2022-10-11 | 张彧 | Control method of cleaning equipment and related device |
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