CN107188391A - A kind of method that high concentration dreg containing arsenic stabilizes curing process - Google Patents
A kind of method that high concentration dreg containing arsenic stabilizes curing process Download PDFInfo
- Publication number
- CN107188391A CN107188391A CN201710610899.2A CN201710610899A CN107188391A CN 107188391 A CN107188391 A CN 107188391A CN 201710610899 A CN201710610899 A CN 201710610899A CN 107188391 A CN107188391 A CN 107188391A
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- CN
- China
- Prior art keywords
- containing arsenic
- dreg containing
- dreg
- high concentration
- arsenic
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
-
- 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
- C02F2101/103—Arsenic compounds
-
- 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 a kind of method that high concentration dreg containing arsenic stabilizes curing process, comprise the following steps:At ambient temperature, the pH of regulation dreg containing arsenic is to faintly acid;The co-precipitation material of excess is added into dreg containing arsenic, and adds water and stirs, stable sediment is generated;Add lime regulation pH value;Flying ash is added to stir;Add cement solidification and conserve.It is an advantage of the invention that:The arsenic in dreg containing arsenic can effectively be stablized, leaching concentration is reduced, and by the suction-operated of flying ash, the arsenic of residual is adsorbed, finally solidified using cement, reach the effect of stable curing.This method can the treatment of wastes with processes of wastes against one another, technological process is simple, workable, energy consumption is low.
Description
Technical field
Disposal technology field is handled the invention belongs to hazardous waste, more particularly to a kind of high concentration dreg containing arsenic stabilisation-
Solidification processing method.
Background technology
Arsenic widely exists in nature, is commonly called as metalloid, and toxicity is extremely strong, there is carcinogenesis.With human economic society
Development, substantial amounts of matter containing arsenic is produced as attendants, and the extensive use in terms of agricultural, pharmaceutical sector and industry,
Development to the mankind brings facility.Meanwhile, substantial amounts of dreg containing arsenic also causes fatal threat, serious influence to us
The environment that we depend on for existence.According to statistics, the whole world is annual because the arsenic that mankind's activity is discharged into the environment of border is about 1,200,000
Ton, the arsenic that operation of nature is diluted in environment is about 2.2 ten thousand tons.In China, arsenic amount maximum is adopted in Guangxi, Yunnan, Hunan every year,
It is still to be expanded by water body and soil by arsenic pollution more serious area, and the problem of arsenic pollution, through serious
Threaten the living environment quality of resident.Therefore the processing method of research dreg containing arsenic is extremely urgent.
At present, the processing method for dreg containing arsenic can be divided into two kinds, respectively pyrogenic attack and wet-treating.Its moderate heat
Method is mainly recycled by being calcined dreg containing arsenic extraction arsenic;Wet method is mainly the arsenic ion in dreg containing arsenic, then
Absorbed by adding medicament or stabilize/solidify.But pyrogenic attack cost is higher, it is adaptable to extensive and arsenic content is higher
Dreg containing arsenic;Stabilisation/solidification landfill is then influenceed by arsenic property in itself and surrounding environment so that the long term storage of arsenic
Stability cannot be ensured.
The present invention carries out stabilizing/solidifying research by reasonable selection medicament to dreg containing arsenic, and it is useless to combine other danger
The feature of thing, carries out the treatment of wastes with processes of wastes against one another, fully makes up the unstability that firming body containing arsenic is filled for a long time.
The content of the invention
It is an object of the invention to provide a kind of method of high concentration dreg containing arsenic stabilisation/curing process, this method can be grown
Phase effectively stabilizes-solidify dreg containing arsenic, it can also substantially reduce medicament use cost while stability is strengthened.
The technical proposal of the invention is realized in this way:A kind of method of high concentration dreg containing arsenic stabilisation-curing process,
Comprise the following steps:At ambient temperature, the pH of regulation dreg containing arsenic is to faintly acid;Added into dreg containing arsenic excessive coprecipitated
Starch matter X, and add water and stir, makes the generation that reacts of co-precipitation material X and the matter containing arsenic in dreg containing arsenic stable
Sediment;Add lime regulation regulation pH value;Then burning residual flying dust is added to stir;It is eventually adding cement solidification and supports
Shield.
In the present invention, the pH of dreg containing arsenic is controlled 4 ~ 7, arsenic unstable in sludge can be made in the form of free state
Leach.Stir after certain time, the co-precipitation material X of excess is added thereto, generate stable matter containing arsenic, add lime and adjust
The PH of section system to 8 ~ 9, utilizes the Ca in lime2+React to form stable arsenide again with free state arsenic, and production
Raw OH-Flocculant can be formed by some of deposit A materials together, play the effect of flocculation.Meanwhile, it is hazardous waste, common
Remaining has substantial amounts of carbon after waste etc. is burned, and its short texture is porous, can be effectively to the absorption containing arsenic ion, flying dust
Surface carries a large amount of negative electrical charges, can produce stronger electric field force to the arsenic of free state, can promote the coagulation of free state arsenic.
Preferably, described faintly acid refers to pH value between 4 ~ 7.
Preferably, the material that described regulation dreg containing arsenic is selected is mainly the one or more such as waste hydrochloric acid, waste nitric acid
Inorganic acid.
Preferably, the co-precipitation material X main components of the addition are Polyferric Sulfate, the co-precipitation time is 30 ~ 60min.
Preferably, the dreg containing arsenic together deposit A mass ratio be 3:1~10:1.
Preferably, the pH value range added after lime reaction should be between 8 ~ 9.
Preferably, the flying dust produced by described trash burning has more carbon source, alkalescent, simultaneous with a large amount of
Negative electrical charge.
Preferably, the mass ratio of the dreg containing arsenic collection and flying dust is 10:7~10:Between 1, the reaction time be 10 ~
30min。
Preferably, the mass ratio of the dreg containing arsenic and cement is 5:1.
Preferably, after the step of the addition cement, in addition to maintenance;The time of the maintenance is 5~7 days.
The beneficial effects of the present invention are:
Utilize the Fe being co-precipitated in substance A3+With the co-precipitation containing arsenic ion and polymerism, the arsenic in dreg containing arsenic is carried out
It is stable.For removal imperfection and unstability containing arsenic ion, the flying dust after incineration of waste has been used to be mixed with it in invention
Stirring is closed, the flexibility and intensity of firming body had both been added, and had also taken full advantage of the stronger adsorptivity of flying dust and charge, is ensured
The permanently effective stability of arsenic in dreg containing arsenic.
Embodiment
Below in conjunction with the implementation in the present invention, the technical scheme in the embodiment of the present invention is clearly and completely retouched
State, it is clear that described embodiment is only one of embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, the scope of protection of the invention is belonged to.
Embodiment 1
At ambient temperature, 100g dreg containing arsenics are weighed, 50mL water is added, 10min is mixed;Useless watery hydrochloric acid 3ml is added, stirring is anti-
Should be 5 to pH value;8g co-precipitation material Polyferric Sulfates are added, 30min is reacted;Lime mixing reaction to the pH value for adding 6g is 8,
Stir 15min;Add the stirring of 25g flying ash thereto again, react 25 min;Complete the stabilisation of arsenic;20g cement is added,
Stir 10min;Conserved.
Performance test:According to leaching toxicity from solid waste method-horizontal vibration method(GB 5086.2-1997), arsenic leaches dense
Degree meets hazard waste landfill contamination control standard(GB 18598-2001).
Embodiment 2
At ambient temperature, 100g dreg containing arsenics are weighed, 35mL water is added, 5min is mixed;Add 5ml waste nitric acids, stirring reaction
It is 4 to pH value;10g co-precipitation material Polyferric Sulfates are added, 35min is reacted;Addition 12g lime mixes reaction to pH value
8.5, stir 10min;Add the stirring of 34g flying ash thereto again, react 30 min;Complete the stabilisation of arsenic;Add 15g water
Mud, stirs 10min;Conserved.
Performance test:According to leaching toxicity from solid waste method-horizontal vibration method(GB 5086.2-1997), arsenic leaches dense
Degree meets hazard waste landfill contamination control standard(GB 18598-2001).
Embodiment 3
At ambient temperature, 100g dreg containing arsenics are weighed, 40mL water is added, 5min is mixed;Add 2ml dilute sulfuric acids, stirring reaction
It is 6 to pH value;6g co-precipitation material Polyferric Sulfates are added, 15min is reacted;Lime mixing reaction to the pH value for adding 9g is 9, is stirred
Mix 10min;Add the stirring of 20g flying ash thereto again, react 30 min;Complete the stabilisation of arsenic;25g cement is added, is stirred
Mix 15min;Conserved.
Performance test:According to leaching toxicity from solid waste method-horizontal vibration method(GB 5086.2-1997), arsenic leaches dense
Degree meets hazard waste landfill contamination control standard(GB 18598-2001).
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (8)
1. a kind of method of high concentration dreg containing arsenic stabilisation-curing process, it is characterised in that:Comprise the following steps:
A, at ambient temperature, adjusts dreg containing arsenic system, makes pH to faintly acid, obtain sludge A;
B, the co-precipitation material X for adding into sludge A excess, and add water and stir, reaction is abundant, make co-precipitation material X with
Matter containing arsenic in dreg containing arsenic A reacts, and generates stable sediment B;
C, the addition lime regulation pH value in sediment B, obtain reactant C;
D, add and flying ash and stir in reactant C, reaction is abundant, obtains reactant D;
E, the addition cement solidification reaction in reactant D, into curing period.
2. a kind of method of high concentration dreg containing arsenic stabilisation-curing process according to claim 1, it is characterised in that:
Regulation dreg containing arsenic system described in step a, refers to be reconciled from useless diluted acid, described faintly acid refers to pH value 4 ~ 7
Between.
3. a kind of method of high concentration dreg containing arsenic stabilisation-curing process according to claim 1, it is characterised in that:
Co-precipitation material X described in step b is Polyferric Sulfate, and it is 10 ~ 120min the coprecipitation reaction times that described reaction, which is fully,.
4. a kind of method of high concentration dreg containing arsenic stabilisation-curing process according to claim 1, it is characterised in that:
Deposit X mass ratioes are 3 to dreg containing arsenic described in step b together:1~10:1.
5. a kind of method of high concentration dreg containing arsenic stabilisation-curing process according to claim 1, it is characterised in that:
PH value range described in step c is between 8 ~ 9.
6. a kind of method of high concentration dreg containing arsenic stabilisation-curing process according to claim 1, it is characterised in that:
Flying dust described in step d refers to residue after the burning such as clinical waste, in alkalescent.
7. a kind of method of high concentration dreg containing arsenic stabilisation-curing process according to claim 1, it is characterised in that:
The mass ratio of dreg containing arsenic and flying dust described in step d is 10:7~10:1, described reaction fully refer to the reaction time for 10 ~
60min。
8. a kind of method of high concentration dreg containing arsenic stabilisation-curing process according to claim 1, it is characterised in that:
Curing reaction described in step e is the hybrid reaction of dreg containing arsenic and cement, and the mixing quality ratio of dreg containing arsenic and cement is 10:1
~5:2, the curing period is 3~15 days.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109592776A (en) * | 2019-02-02 | 2019-04-09 | 常熟理工学院 | A kind of preparation method of the waste water renovation agent based on flying ash |
CN110698009A (en) * | 2019-11-14 | 2020-01-17 | 云南大地丰源环保有限公司 | Passivation treatment method for arsenic-containing sludge |
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CN102218428A (en) * | 2011-01-20 | 2011-10-19 | 杭州大地环保有限公司 | Treatment method of arsenic slag |
CN104556920A (en) * | 2014-11-27 | 2015-04-29 | 云南省环境科学研究院(中国昆明高原湖泊国际研究中心) | Arsenic-containing neutralization slag solidifying and stabilizing agent and method for solidifying and stabilizing arsenic-containing neutralization slag by using same |
CN104761113A (en) * | 2015-04-28 | 2015-07-08 | 江苏理工学院 | Stabilized solidification method of electroplating sludge |
CN104774619A (en) * | 2015-02-13 | 2015-07-15 | 湖南永清环保研究院有限责任公司 | Immobilizing and stabilizing agent for arsenic-contaminated soil and application thereof |
CN106148705A (en) * | 2016-07-20 | 2016-11-23 | 长沙华时捷环保科技发展股份有限公司 | The method going arsenic removal from acidic arsenic-containing solution |
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2017
- 2017-07-25 CN CN201710610899.2A patent/CN107188391A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102218428A (en) * | 2011-01-20 | 2011-10-19 | 杭州大地环保有限公司 | Treatment method of arsenic slag |
CN104556920A (en) * | 2014-11-27 | 2015-04-29 | 云南省环境科学研究院(中国昆明高原湖泊国际研究中心) | Arsenic-containing neutralization slag solidifying and stabilizing agent and method for solidifying and stabilizing arsenic-containing neutralization slag by using same |
CN104774619A (en) * | 2015-02-13 | 2015-07-15 | 湖南永清环保研究院有限责任公司 | Immobilizing and stabilizing agent for arsenic-contaminated soil and application thereof |
CN104761113A (en) * | 2015-04-28 | 2015-07-08 | 江苏理工学院 | Stabilized solidification method of electroplating sludge |
CN106148705A (en) * | 2016-07-20 | 2016-11-23 | 长沙华时捷环保科技发展股份有限公司 | The method going arsenic removal from acidic arsenic-containing solution |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109592776A (en) * | 2019-02-02 | 2019-04-09 | 常熟理工学院 | A kind of preparation method of the waste water renovation agent based on flying ash |
CN109592776B (en) * | 2019-02-02 | 2021-04-27 | 常熟理工学院 | Preparation method of waste water repairing agent based on incineration fly ash |
CN110698009A (en) * | 2019-11-14 | 2020-01-17 | 云南大地丰源环保有限公司 | Passivation treatment method for arsenic-containing sludge |
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