CN105858832A - Heavy metal wastewater treatment material and method thereof - Google Patents
Heavy metal wastewater treatment material and method thereof Download PDFInfo
- Publication number
- CN105858832A CN105858832A CN201610224584.XA CN201610224584A CN105858832A CN 105858832 A CN105858832 A CN 105858832A CN 201610224584 A CN201610224584 A CN 201610224584A CN 105858832 A CN105858832 A CN 105858832A
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- CN
- China
- Prior art keywords
- heavy metal
- magnesite
- water
- metal wastewater
- magnesium carbonate
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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
- 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
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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 heavy metal wastewater treatment method. The heavy metal wastewater treatment method is characterized in that a heavy metal wastewater treatment material is formed through mixing a granular material A with a granular material B according to a certain ratio. A preparation method of the material A comprises the following steps: calcining magnesite at 700-900DEG C, crushing the calcined magnesite, sieving the crushed magnesite by a 200 mesh sieve, adding water, forming 2-10mm particles, and naturally curing the particles to obtain the granular strength composite material formed by magnesium oxide, magnesium carbonate and sodium hydroxide. The material A is a 2-10mm granular material obtained through crushing and screening attapulgite and dolostone. The material A and the material B are mixed according to a mass ratio of 1:1-10:1, and the obtained mixture is used to treat heavy metal-containing wastewater.
Description
Technical field
The invention belongs to waste water process and nonmetal mineral resource utilizes technical field, relate to material for water treatment and method.
Background technology
China has the waste water containing heavy metal of tens billion of cubic metres every year, including mine, smelt, be electrolysed, electroplate, the waste water of the industry such as agricultural chemicals, medicine, paint, chemical industry, pigment.Heavy metal wastewater thereby discharge causes river, lake sediment, and especially soil is by heavy metal pollution, has not only broken up ecological environment, and can enter human body by food chain enrichment and threaten human body healthy.
At present both at home and abroad the processing method of heavy metal wastewater thereby can be divided into two big classes: a class is to make in waste water the heavy metal ion in dissolved state be changed into insoluble heavy metal compound, then through precipitating or FLOTATION SEPARATION is removed from waste water.Conventional method has hydroxide precipitation method, sulphide precipitation, ferrite coprecipitation, redox precipitation method, ion floatation method, electrolysis, diaphragm process, bioanalysis etc..The most frequently used in these methods is hydroxide precipitation method, sulphide precipitation, ferrite coprecipitation and redox precipitation method.But jointly there is problems of, precipitation particle is tiny, needing sedimentation basin, newborn fine particle to be difficult to be completely separated from the water, water treatment efficiency is unstable, and precipitating sludge amount is big, moisture content is high, difficult treatment.In sulphide precipitation, precipitating reagent is difficult to control in right amount, to easily cause secondary pollution.The several methods such as ion floatation method, electrolysis, diaphragm process are because of processing cost height, system complex, difficult in maintenance and be rarely employed.
Another kind of method is to carry out adsorbing, concentrate and separating under conditions of not changing heavy metal ion chemical form, concrete grammar has hyperfiltration, electroosmose process, membrane separation process, evaporation concentration method, absorption method, ion-exchange, solvent extraction etc., and wherein extensive concern is absorption method.The material that Heavymetal Wastewater Treatment by Adsorption commonly uses is cheap mineral material, such as bentonite, zeolite, sepiolite, attapulgite, magnetic iron ore, goethite etc..These mineral materials or modified product are to Cd in waste water2+、Pb2+、Hg2+、Cu2+Etc. having stronger suction-operated, but adsorption capacity is limited, and some sorbing materials are owing to having colloidal nature, and separation of solid and liquid and sludge dewatering are the most relatively difficult.
Summary of the invention
The present invention is for avoiding the weak point existing for above-mentioned prior art, it is provided that a kind of material processing effluent containing heavy metal ions and method, to reaching heavy metal wastewater thereby and stably processing, advanced treating, harmless treatment and resource reclaim.
The present invention solves technical problem and be the technical scheme is that
Select magnesite massive ore and attapulgite dolomite as raw material respectively through calcining, broken, screening preparation two kinds of granular materials of AB, two kinds of granular materials of AB of preparation are mixed composition according to the ratio of mass ratio 1:1-10:1 and processes the material of heavy metal wastewater thereby；
Described materials A preparation comprises the concrete steps that: selecting magnesite massive ore, wherein the content of magnesium carbonate is not less than 80%；At 700-900 DEG C of calcined magnesite, pulverized 200 mesh, and added water and be shaped to 2-10mm particle, natural curing, it is thus achieved that the composite being made up of magnesia, magnesium carbonate, magnesium hydroxide；
Or first magnesite was pulverized 200 mesh, and then 700-900 DEG C of calcining, added water and be shaped to 2-10mm particle, natural curing, it is thus achieved that the composite with granule strength being made up of magnesia, magnesium carbonate, magnesium hydroxide；
Described material B preparation comprises the concrete steps that: selecting the attapulgite dolomite in Attapulgite clay, wherein dolomite content is more than 60%, and broken, screening obtains 2-10mm granular materials.
The materials'use method of described process heavy metal wastewater thereby, it is characterised in that: AB bi-material is used in mixed way according to the ratio of mass ratio 1:1-10:1；
This mixing particulate material is uniformly put in the neutralization pond processing heavy metal-containing waste water, laying depth 10-50cm, heavy metal wastewater thereby flows through from particle internal penetration and surface, neutralizes and induce heavy metal precipitation, and the heavy metal precipitation of formation is retained by particulate matter adsorption filtration；
When water outlet pH is less than 7.5 or heavy metal exceedes discharge standard, in neutralization pond, uniformly adds granular materials thick for 10cm continue to run with；
When the accumulation of neutralization pond basic sediment reach expected height impact neutralize reaction time, stop waste water and process, remove the deposit in pond, again lay above-mentioned material and start water and process and run.
In described heavy metal wastewater thereby, heavy metal ion includes Cd2+、Hg2+、Ag+、Pb2+、Cu2+、Co2+、Ni2+、Zn2+、Mn2+And/or Fe2+, in described heavy metal wastewater thereby, concentration of heavy metal ion is 0.5 ~ 200mg/L.
The positive effect of the present invention is embodied in:
The product main component of 700-900 DEG C of calcined magnesite is magnesia, there is the effect of aquation, slowly dissolving release hydroxyl, and constitute pH buffer system with clayey dolomite, during processing heavy metal wastewater thereby, water outlet pH maintains between 8-10, and under this pH value, the induced precipitation of magnesia and dolomite is transformed into hydroxide and/or carbonate heavy metal ion.
Calcined magnesite, attapulgite dolomite all have loose structure characteristic, heavy metal in waste water can diffuse into particle internal generation water-mineral interface reaction, improve reaction specific surface area, metal ion can precipitate at material granule internal voids, improves the capacity of fixing heavy metal.
In AB mixing raw material, main component is magnesia, neutralizes the process of the sulfate-containing wastewater such as mine wastewater, the magnesium salts that product is the most readily soluble, and rare crystal of calcium sulfate precipitates, decreases the amount of solid waste.
The present invention processes the advantage of heavy metal wastewater thereby technical method: water outlet pH is stable, need not separation of solid and liquid, material has neutralization induction heavy metal ion precipitation reaction activity, and the capacity of fixing heavy metal is big, product moisture content is low, it is simple to the disposal of precipitating sludge and the recovery of heavy metal.
Detailed description of the invention
The non-limiting enforcement step of the present invention is as follows:
Embodiment 1
Select magnesite massive ore, the wherein content 90% of magnesium carbonate；
At 700-900 DEG C of calcined magnesite, pulverized 200 mesh, and added water and be shaped to 2-10mm particle, natural curing, it is thus achieved that the composite with granule strength being made up of magnesia, magnesium carbonate, magnesium hydroxide；
Selecting the attapulgite dolomite in Attapulgite clay, wherein dolomite content is 75%, and broken, screening obtains 2-3mm and obtains granular materials B.
AB bi-material is used in mixed way according to mass ratio 5:1 ratio；
This mixing particulate material is joined in the experiment post of Ф 20mm height 500mm, lay 30cm thick；
The present embodiment preparation is containing Pb2+The aqueous solution of 50mg/L, the pH value adjusting waste water is 4-4.5, as simulation heavy metal wastewater thereby；
The simulated wastewater peristaltic pump conveying of preparation is flow through stratum granulosum from bottom to top according to hydraulic detention time 30min, pH and the Pb concentration of periodically sampling detection water outlet, result shows that water outlet pH and Pb concentration all meet emission request in 10 days run.
Embodiment 2
Select magnesite massive ore, the wherein content 90% of magnesium carbonate；
First magnesite was pulverized 200 mesh, and then 700-900 DEG C of calcining, added water and be shaped to 2-10mm particle, natural curing, it is thus achieved that the composite with granule strength being made up of magnesia, magnesium carbonate, magnesium hydroxide；
Selecting the attapulgite dolomite in Attapulgite clay, wherein dolomite content is 75%, and broken, screening obtains 4-10mm and obtains granular materials B.
AB bi-material is used in mixed way according to mass ratio 2:1 ratio；
This mixing particulate material is joined in the experiment post of Ф 20mm height 500mm, lay 30cm thick；
The present embodiment preparation is containing Cu2+The aqueous solution of 50mg/L, the pH value adjusting waste water is 4, as simulation heavy metal wastewater thereby；
The simulated wastewater peristaltic pump conveying of preparation is flow through stratum granulosum from bottom to top according to hydraulic detention time 30min, pH and the Cu concentration of periodically sampling detection water outlet, result shows that water outlet pH and Cu concentration all meet emission request.
Claims (2)
1. the material processing heavy metal wastewater thereby, it is characterised in that be made up of the material of process heavy metal wastewater thereby two kinds of granular materials of AB according to the ratio mixing of mass ratio 1:1-10:1；
Described materials A preparation comprises the concrete steps that:
Magnesite massive ore, wherein the content of magnesium carbonate is not less than 80%；
At 700-900 DEG C of calcined magnesite, pulverized 200 mesh, and added water and be shaped to 2-10mm particle, natural curing, it is thus achieved that the composite with granule strength being made up of magnesia, magnesium carbonate, magnesium hydroxide；
Or first magnesite was pulverized 200 mesh, and then 700-900 DEG C of calcining, added water and be shaped to 2-10mm particle, natural curing, it is thus achieved that the composite with granule strength being made up of magnesia, magnesium carbonate, magnesium hydroxide；
Described material B preparation comprises the concrete steps that:
Selecting the attapulgite dolomite in Attapulgite clay, wherein dolomite content is more than 60%, and broken, screening obtains 2-10mm and obtains granular materials.
2. according to the materials'use method processing heavy metal wastewater thereby a kind of described in patent requirements 1, it is characterised in that: AB bi-material is used in mixed way according to the ratio of mass ratio 1:1-10:1；
This mixing particulate material is uniformly put in the neutralization pond processing heavy metal-containing waste water, laying depth 10-50cm, heavy metal-containing waste water flows through from particle internal penetration and surface, neutralizes and induce heavy metal precipitation, and the heavy metal precipitation of formation is retained by particulate matter adsorption filtration；
When water outlet pH is less than 7.5 or heavy metal exceedes discharge standard, in neutralization pond, uniformly adds granular materials thick for 10cm continue water process operation；
When the accumulation of neutralization pond basic sediment reach expected height impact neutralize reaction time, stop waste water and process, remove the deposit in pond, again lay above-mentioned material and start water and process and run.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224584.XA CN105858832A (en) | 2016-04-12 | 2016-04-12 | Heavy metal wastewater treatment material and method thereof |
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| CN201610224584.XA CN105858832A (en) | 2016-04-12 | 2016-04-12 | Heavy metal wastewater treatment material and method thereof |
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| CN105858832A true CN105858832A (en) | 2016-08-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107456944A (en) * | 2017-09-26 | 2017-12-12 | 南京乐透思环保科技有限公司 | A kind of inorganic composite materials, preparation method and its purposes for being used for heavy-metal ion removal in sewage disposal |
| CN107698009A (en) * | 2017-10-20 | 2018-02-16 | 东南大学 | A kind of carbon containing magnesium salts material for removing removing heavy metals and its preparation method and application |
| CN108658194A (en) * | 2018-06-13 | 2018-10-16 | 合肥工业大学 | A kind of preparation method and applications except phosphorus composite material |
| CN110697964A (en) * | 2019-11-11 | 2020-01-17 | 方小兵 | Method for removing heavy metal in sewage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004330018A (en) * | 2003-05-02 | 2004-11-25 | Amusu Engineering:Kk | Solidification/insolubilization agents and solidification/insolubilization method for soil, incineration ash, coal ash and plaster board waste |
| CN105110445A (en) * | 2015-09-11 | 2015-12-02 | 合肥工业大学 | Method for treating heavy metal wastewater |
| CN105217713A (en) * | 2015-09-11 | 2016-01-06 | 合肥工业大学 | A kind of calcining spathic iron ore degree of depth removes the method for phosphorus in water |
-
2016
- 2016-04-12 CN CN201610224584.XA patent/CN105858832A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004330018A (en) * | 2003-05-02 | 2004-11-25 | Amusu Engineering:Kk | Solidification/insolubilization agents and solidification/insolubilization method for soil, incineration ash, coal ash and plaster board waste |
| CN105110445A (en) * | 2015-09-11 | 2015-12-02 | 合肥工业大学 | Method for treating heavy metal wastewater |
| CN105217713A (en) * | 2015-09-11 | 2016-01-06 | 合肥工业大学 | A kind of calcining spathic iron ore degree of depth removes the method for phosphorus in water |
Non-Patent Citations (1)
| Title |
|---|
| 邱高 等: "粘土质白云岩去除水中铜离子的效果及其机制", 《高校地质学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107456944A (en) * | 2017-09-26 | 2017-12-12 | 南京乐透思环保科技有限公司 | A kind of inorganic composite materials, preparation method and its purposes for being used for heavy-metal ion removal in sewage disposal |
| CN107698009A (en) * | 2017-10-20 | 2018-02-16 | 东南大学 | A kind of carbon containing magnesium salts material for removing removing heavy metals and its preparation method and application |
| CN108658194A (en) * | 2018-06-13 | 2018-10-16 | 合肥工业大学 | A kind of preparation method and applications except phosphorus composite material |
| CN110697964A (en) * | 2019-11-11 | 2020-01-17 | 方小兵 | Method for removing heavy metal in sewage |
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Application publication date: 20160817 |