CN101879522A - Repair method for lead zinc ore combined contamination soil - Google Patents
Repair method for lead zinc ore combined contamination soil Download PDFInfo
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- CN101879522A CN101879522A CN 201010239011 CN201010239011A CN101879522A CN 101879522 A CN101879522 A CN 101879522A CN 201010239011 CN201010239011 CN 201010239011 CN 201010239011 A CN201010239011 A CN 201010239011A CN 101879522 A CN101879522 A CN 101879522A
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Abstract
The invention discloses a repair method for lead zinc ore combined contamination soil. Phosphate rock powder, calcium magnesium phosphate and superphosphate are taken as heavy metal fixing agents to be mixed with the lead zinc ore combined contamination soil, wherein the weight ratio of phosphate rock powder to calcium magnesium phosphate to superphosphate is 1:1-3:3-5. The repair method is suitable for repairing soil with seriously contaminated by lead zinc ore combination, the concentration of lead and zinc in the contaminated soil can respectively reach as high as more than 15000mg/kg and 5000 mg/kg. The method has wide source of used materials, simple production process, low cost, good repair effect and simple operation method, and can fix various heavy metals simultaneously.
Description
Technical field
The invention belongs to technical field of resource environments, the restorative procedure that relates to a kind of lead zinc ore combined contamination soil, specifically be to mix with lead zinc ore combined contamination soil as the heavy metal fixative with ground phosphate rock, calcium magnesium phosphate and calcium superphosphate, thus the method for repairing contaminated soil.
Background technology
That soil pollution has is gradual, the characteristics of chronicity, disguise and complexity, harm to animal and human's body often comprises that by crops grain, vegetables, fruit or herbage etc. accumulate harm step by step, people often be in its evil and do not know do harm to, directly perceiveed by the people unlike atmosphere, water pollution.Pollutant finally is deposited in the soil more than 90% in atmosphere and the water body.Conversely, contaminated soil also will cause the pollution of air or water body.
The concrete recovery technique of different pollution type soil is different fully.To repair according to polluting feature contaminated soil.
At present, the soil remediation technology mainly contains: biological restoration (comprising phytoremediation, microorganism reparation), chemistry reparation, physics reparation etc.The reparation of contaminated soil enters food chain for the blocking-up pollutant, prevents the infringement to health, promotes the protection and the social sustainable harmonious development of land resource to have important practical significance.
According to the soil remediation patent retrieval in the Chinese patent Information Network: the restorative procedure to heavy-metal contaminated soil comprises: the method for phytoremediation heavy-metal contaminated soil (number of patent application is 200810027577,200710070571,200710070622,200710020380,200610011046,200610046244,200410021546,200410020981,200410027833,200410015561,200410015653,200410015651); The method of electrochemical method restoration of soil polluted by heavy metal (number of patent application is 200710053425,200510026610); The method of microorganism restoration of soil polluted by heavy metal (number of patent application is 200710132244,200710132243,200710049533,200710049531,200710049532,200710049530,200710047489,200710049528).
The cost of electrochemical method restoration of soil polluted by heavy metal is very high, only is confined to the laboratory research stage at present.Though the microorganism restoration of soil polluted by heavy metal can be used for reality, but because cultured microorganism is eliminated by the original superior microorganism of soil after being discharged into soil easily, effect can not be lasting, and the heavy metal that absorbs and be accumulated in the microbial body can not collection and treatment, and heavy metal is discharged into soil again and produces more serious secondary pollution behind the microbial death.The method of phytoremediation heavy-metal contaminated soil begins to be used for field reality now, often output is very low but because of the plant that is used for the heavy metal reparation, cause repairing effect bad or repair time is oversize, its growth is severely limited on heavy metal pollution concentration soil with high especially, even can not grow, cause repairing failure.
The feature of plumbous zinc ore contaminated soil is that content of beary metal is very high, and is not single heavy metal pollution, but the combined pollution of a plurality of heavy metals, content of beary metal such as especially plumbous zinc cadmium are high unusually.Therefore, above-mentioned method about plant and microorganism restoration of soil polluted by heavy metal can not practical application.
Patent of the present invention provides a kind of restorative procedure of lead zinc ore combined contamination soil at the deficiency of existing recovery technique, and wherein lead and zinc concentration can be respectively up to 15000 with more than the 5000mg/kg in the contaminated soil.
Summary of the invention
The objective of the invention is to overcome the deficiency of existing plant and microorganism restoration of soil polluted by heavy metal, a kind of restorative procedure of lead zinc ore combined contamination soil is provided, can make high concentration heavy-metal composite pollution soil obtain economy and repair fast.
The present invention adopts following technical scheme:The restorative procedure of lead zinc ore combined contamination soil, it mixes with lead zinc ore combined contamination soil as the heavy metal fixative with ground phosphate rock, calcium magnesium phosphate and calcium superphosphate, and the weight ratio of ground phosphate rock, calcium magnesium phosphate and calcium superphosphate is 1:1～3:3～5.
Further, the weight ratio of heavy metal fixative and lead zinc ore combined contamination soil is 1:100～1000, is preferably 1:100～800.
Further, the pH value of described heavy metal fixative is 6～12, and wherein the weight ratio of ground phosphate rock, calcium magnesium phosphate and calcium superphosphate is 1:3:5.
Described ground phosphate rock fineness is preferably by 100～300 mesh sieve.
The principle that the present invention repairs the lead zinc ore combined contamination soil method is based upon on the chemical thermodynamics basis, with ground phosphate rock, calcium magnesium phosphate and calcium superphosphate as the heavy metal fixative, make the active plumbous phosphorus lead minerals/precipitation that generates the solubility minimum, thus fixing plumbous, reduced plumbous toxicity.
Lead minerals/the precipitation that contains that can exist in soil environment comprises that mainly in (hydrogen) oxide, carbonate, sulfate, silicate and the phosphate, phosphate is the solubility minimum.And in phosphate, the solubility of phosphorus (chlorine/hydroxyl/fluorine) lead ore is minimum.Phosphorus can generate the minimum and very stable phosphorus of solubility (chlorine/hydroxyl/fluorine) lead ore with plumbous interaction fast, and plumbous concentration reaches extremely low level of security in the control solution, thereby the lead contamination in the soil is administered.
The heavy metal fixative that the present invention repairs lead zinc ore combined contamination soil comprises ground phosphate rock, calcium magnesium phosphate and calcium superphosphate, wherein the ground phosphate rock fineness is by 100～300 mesh sieve, calcium magnesium phosphate and calcium superphosphate are the criterion of acceptability product that Chinese market is sold, and raw material is easy to get, and cost is low.
The inventive method is applicable to repairs lead zinc ore combined highly polluted soil, and lead and zinc concentration can be respectively up to 15000 with more than the 5000mg/kg in the contaminated soil.Material therefor wide material sources of the present invention, production technology is simple, and is with low cost, can be simultaneously fixing various heavy, repairing effect is good, and method is simple to operate.
The specific embodiment
Embodiment 1
Common rock phosphate in powder is levigate, by 100 mesh sieve.Calcium magnesium phosphate and calcium superphosphate are the criterion of acceptability product that Chinese market is sold.Calcium superphosphate, calcium magnesium phosphate, ground phosphate rock are mixed by weight the ratio that is 1:1:3, abundant mixing, regulating the pH value is 6, makes the heavy metal fixative.
Heavy metal fixative and lead zinc ore combined contamination soil are mixed, and the weight ratio of heavy metal fixative and lead zinc ore combined contamination soil is 1:1000.Be respectively 16362 and 5585mg/kg for plumbous in the examination contaminated soil and zinc concentration.
Adopt present embodiment, fixed rate plumbous and zinc is respectively 80.3% and 78.9% in the contaminated soil.
Embodiment 2:
Common rock phosphate in powder is levigate, by 200 mesh sieve.Calcium magnesium phosphate and calcium superphosphate are the criterion of acceptability product that Chinese market is sold.Calcium superphosphate, calcium magnesium phosphate, ground phosphate rock are mixed by weight the ratio that is 1:2:3, abundant mixing, regulating the pH value is 10, makes the heavy metal fixative.
Heavy metal fixative and lead zinc ore combined contamination soil are mixed, and the weight ratio of heavy metal fixative and lead zinc ore combined contamination soil is 1:1000.For plumbous in the examination contaminated soil and zinc concentration respectively up to 16362 and 5585mg/kg.
Adopt present embodiment, fixed rate plumbous and zinc is respectively 89.6% and 87.1% in the contaminated soil.
Embodiment 3:
Common rock phosphate in powder is levigate, by 200 mesh sieve.Calcium magnesium phosphate and calcium superphosphate are the criterion of acceptability product that Chinese market is sold.Calcium superphosphate, calcium magnesium phosphate, ground phosphate rock are mixed by weight the ratio that is 1:3:5, abundant mixing, regulating the pH value is 10, makes the heavy metal fixative.
Heavy metal fixative and lead zinc ore combined contamination soil are mixed, and the weight ratio of heavy metal fixative and lead zinc ore combined contamination soil is 1:500.For plumbous in the examination contaminated soil and zinc concentration respectively up to 16362 and 5585mg/kg.
Adopt present embodiment, fixed rate plumbous and zinc is respectively 95.6% and 93.8% in the contaminated soil.
Embodiment 4:
Common rock phosphate in powder is levigate, by 200 mesh sieve.Calcium magnesium phosphate and calcium superphosphate are the criterion of acceptability product that Chinese market is sold.Calcium superphosphate, calcium magnesium phosphate, ground phosphate rock are mixed by weight the ratio that is 1:3:5, abundant mixing, regulating the pH value is 11, makes the heavy metal fixative.
Heavy metal fixative and lead zinc ore combined contamination soil are mixed, and the weight ratio of heavy metal fixative and lead zinc ore combined contamination soil is 1:800.For plumbous in the examination contaminated soil and zinc concentration respectively up to 16362 and 5585mg/kg.
Adopt present embodiment, fixed rate plumbous and zinc is respectively 96.7% and 95.1% in the contaminated soil.
Embodiment 5:
Common rock phosphate in powder is levigate, by 300 mesh sieve.Calcium magnesium phosphate and calcium superphosphate are the criterion of acceptability product that Chinese market is sold.Calcium superphosphate, calcium magnesium phosphate, ground phosphate rock are mixed by weight the ratio that is 1:3:5, abundant mixing, regulating the pH value is 12, makes the heavy metal fixative.
Heavy metal fixative and lead zinc ore combined contamination soil are mixed, and the weight ratio of heavy metal fixative and lead zinc ore combined contamination soil is 1:800.For plumbous in the examination contaminated soil and zinc concentration respectively up to 16362 and 5585mg/kg.
Adopt present embodiment, fixed rate plumbous and zinc is respectively 98.1% and 96.3% in the contaminated soil.
Certainly; those of ordinary skill in the art will be appreciated that above embodiment is used for illustrating the present invention, and is not as limitation of the invention; as long as in essential scope of the present invention, all will drop in protection scope of the present invention variation, the modification of the above embodiment.
Claims (8)
1. the restorative procedure of lead zinc ore combined contamination soil, it is characterized in that, mix with lead zinc ore combined contamination soil as the heavy metal fixative with ground phosphate rock, calcium magnesium phosphate and calcium superphosphate, the weight ratio of ground phosphate rock, calcium magnesium phosphate and calcium superphosphate is 1:1～3:3～5.
2. the restorative procedure of lead zinc ore combined contamination soil according to claim 1 is characterized in that the weight ratio of heavy metal fixative and lead zinc ore combined contamination soil is 1:100～1000.
3. as the restorative procedure of lead zinc ore combined contamination soil as described in the claim 2, it is characterized in that the weight ratio of heavy metal fixative and lead zinc ore combined contamination soil is 1:100～800.
4. as the restorative procedure of claim 1-3 lead zinc ore combined contamination soil as described in each, it is characterized in that the weight ratio of ground phosphate rock, calcium magnesium phosphate and calcium superphosphate is 1:3:5.
5. as the restorative procedure of claim 1-3 lead zinc ore combined contamination soil as described in each, it is characterized in that the pH value of heavy metal fixative is 6～12.
6. as the restorative procedure of lead zinc ore combined contamination soil as described in the claim 4, it is characterized in that described ground phosphate rock fineness is for by 100～300 mesh sieve.
7. as the restorative procedure of lead zinc ore combined contamination soil as described in the claim 4, it is characterized in that the pH value of heavy metal fixative is 6～12.
8. the restorative procedure of lead zinc ore combined contamination soil according to claim 1 is characterized in that, described ground phosphate rock fineness is for by 100～300 mesh sieve.
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| CN2010102390117A CN101879522B (en) | 2010-07-28 | 2010-07-28 | Repair method for lead zinc ore combined contamination soil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416403A (en) * | 2011-08-02 | 2012-04-18 | 河南工业大学 | Method for stabilizing Pb in calcareous Pb-contaminated soil by combining hydrochloric acid and monopotassium phosphate |
| CN102559198A (en) * | 2010-12-14 | 2012-07-11 | 华中农业大学 | Passivator for controlling pollutions of heavy metals copper, lead and cadmium on soil and applications thereof |
| CN102764757A (en) * | 2012-08-02 | 2012-11-07 | 大连民族学院 | Bioremediation method for heavy-metal contaminated soil of mining area |
| CN110040919A (en) * | 2019-04-19 | 2019-07-23 | 辽宁大学 | A kind of compound phosphorous passivator of ground phosphate rock-phosphate and its preparation method and application |
| CN112222181A (en) * | 2020-09-29 | 2021-01-15 | 上海第二工业大学 | Heavy metal lead contaminated soil remediation method based on deep eutectic solvent synthesized by choline chloride and malonic acid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101003452A (en) * | 2007-01-10 | 2007-07-25 | 南京大学 | Regulation and control agent in use for treating soil polluted by heavy metals |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101003452A (en) * | 2007-01-10 | 2007-07-25 | 南京大学 | Regulation and control agent in use for treating soil polluted by heavy metals |
Non-Patent Citations (2)
| Title |
|---|
| 《中国博士论文全文数据库》 20080701 王碧玲 "含磷物质修复铅锌矿污染土壤的机理和技术" 第112页 1-8 , 2 * |
| 《环境科学学报》 20050926 王碧玲,谢正苗等 "磷肥对铅锌矿污染土壤中铅毒的修复作用" 第1190页、第1192页、第1193页 1-8 第25卷, 第9期 2 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559198A (en) * | 2010-12-14 | 2012-07-11 | 华中农业大学 | Passivator for controlling pollutions of heavy metals copper, lead and cadmium on soil and applications thereof |
| CN102416403A (en) * | 2011-08-02 | 2012-04-18 | 河南工业大学 | Method for stabilizing Pb in calcareous Pb-contaminated soil by combining hydrochloric acid and monopotassium phosphate |
| CN102764757A (en) * | 2012-08-02 | 2012-11-07 | 大连民族学院 | Bioremediation method for heavy-metal contaminated soil of mining area |
| CN110040919A (en) * | 2019-04-19 | 2019-07-23 | 辽宁大学 | A kind of compound phosphorous passivator of ground phosphate rock-phosphate and its preparation method and application |
| CN110040919B (en) * | 2019-04-19 | 2022-03-25 | 辽宁大学 | Ground phosphate rock-phosphate composite phosphorus-containing passivator and preparation method and application thereof |
| CN112222181A (en) * | 2020-09-29 | 2021-01-15 | 上海第二工业大学 | Heavy metal lead contaminated soil remediation method based on deep eutectic solvent synthesized by choline chloride and malonic acid |
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| CN101879522B (en) | 2012-06-13 |
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