CN104927871A - Heavy metal stabilizer and method for stabilizing soil heavy metal through same - Google Patents
Heavy metal stabilizer and method for stabilizing soil heavy metal through same Download PDFInfo
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- CN104927871A CN104927871A CN201510412174.3A CN201510412174A CN104927871A CN 104927871 A CN104927871 A CN 104927871A CN 201510412174 A CN201510412174 A CN 201510412174A CN 104927871 A CN104927871 A CN 104927871A
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Abstract
The invention belongs to the technical field of heavy metal contaminated soil remediation, and particularly relates to a heavy metal stabilizer and a method for stabilizing soil heavy metal through the same. The heavy metal stabilizer comprises, by mass, 50-60% of phosphate, 20-30% of quick lime, 15-20% of zeolite powder and 3-5% of potassium chloride. When the heavy metal stabilizer is used for processing heavy metal contaminated soil, the heavy metal stabilizer and water are mixed into turbid liquid, and the turbid liquid is added into the heavy metal contaminated soil for sufficient mixing. The heavy metal stabilizer has the advantages that the concentration of heavy metal ion leachate of stabilized heavy metal contaminated soil is far lower than the standard limiting value specified in Hazardous Waste Identification Standard Leaching Toxicity Identification (GB5085.3-2007); the preparation raw materials of the heavy metal stabilizer are low in price, and therefore the soil heavy metal stabilizing cost is lowered; the heavy metal stabilizer can highly stabilize heavy metal, and therefore dissolving resistance and seepage of heavy metal ions are effectively prevented.
Description
Technical field
The invention belongs to remediation of heavy metal-contaminated soil field, be specifically related to a kind of heavy metal stabilizer and use the method for this heavy metal stabilizer stabilization heavy metal-polluted soil.
Background technology
Current, China's Heavy Metals In Environment is comparatively serious and general, and Heavy Metals In Environment is to the quality of life of people and healthyly bring very large impact, and the eco-toxicity risk that especially heavy metal brings out more and more receives publicity.Because sources of heavy metal is complicated, in environment between heavy metal different shape, different heavy metal and with the interaction of other pollutents, the complicacy producing various combined pollution adds the difficulty of heavy metal research, and heavy metal has chronicity, cumulative bad, latent and non-reversibility.
Therefore, Environmental Protection in China department and governments at all levels increase each department Heavy Metals In Environment preventing and controlling, " heavy metal contamination integrated control " the 12 " planning " of State Council's reply clearly proposes, fairly perfect Heavy Metal Pollution system, accident emergency system and environment and health risk evaluation system to be set up by 2015, solve the outstanding problem of a collection of infringement health of the masses, substantially stop sudden heavy metal contamination event situation occurred frequently.Plan heavy metal contaminants heavy metal lead, mercury, cadmium, chromium and metalloid arsenic being classified as preferential control.Therefore, Heavy Metal Pollution Control technology will become the Hot Contents in heavy metal contamination field in one period from now on.
At present, administer repairing heavy metal in soil pollution and also have many sections of public technology bibliographical informations.Such as application number be 201210107906.04 Chinese invention patent application disclose a heavy metal species ambient cure agent and use the method for heavy metal in its curing heavy metal pollutent, utilize magnesium oxide (30% ~ 40%), potassium primary phosphate (55% ~ 65%), borax (3.5% ~ 5%), ferric oxide (0.1% ~ 0.5%), silicon-dioxide (0.1% ~ 0.5%), under normal temperature condition, solidification treatment is respond well.Application number be 201310732102.8 Chinese invention patent application disclose a kind of heavy metals immobilization agent and use the method for this heavy metals immobilization agent solidification and stabilization heavy metal-polluted soil, take flyash as main raw material, with cement, carbide slag for Additive, by the excitation of alkali lye, solidification and stabilization heavy metal-polluted soil.
Existing for heavy-metal contaminated soil stabilization treatment be add stablizer after formed insoluble or sl. sol. heavy metal precipitation form exist, when outside atmosphere changes (as potential of hydrogen condition changes), heavy metal ion is easily anti-molten.
Summary of the invention
The invention discloses a kind of heavy metal stabilizer and use the method for this heavy metal stabilizer stabilization heavy metal-polluted soil, the stabilising effect of the heavy-metal contaminated soil after stable is good, solves the drawback that existing solidification and stabilization process heavy-metal contaminated soil is easily anti-molten simultaneously.
Object of the present invention is achieved through the following technical solutions:
A kind of heavy metal stabilizer, the mass percent of its raw material is: phosphoric acid salt 50% ~ 60%, unslaked lime 20% ~ 30%, zeolite powder 20% ~ 25%, Repone K 3% ~ 5%.
Under normal temperature and pressure, above-mentioned raw materials is mixed in proportion.
In the present invention, described phosphoric acid salt is potassium primary phosphate or SODIUM PHOSPHATE, MONOBASIC, most preferably is SODIUM PHOSPHATE, MONOBASIC.
The mass percent of zeolite powder is 15% ~ 20%, is preferably 16% ~ 18%.Zeolite is the manosil AS natural mineral of a kind of moisture basic metal or alkaline-earth metal, mainly there is the tetrahedron that Si, Al and O 3 kinds is elementary composition, silicon-oxy tetrahedron wherein and silicon-oxy tetrahedron can construct the three-dimensional space rack-like of infinite expanding, and therefore zeolite is because having stronger absorption and ion-exchange capacity.Do with zeolite the trapping that heavy metal process raw material can realize heavy metal ion, the stuctures and properties of other medicaments can also be improved simultaneously, the chemical action of itself and heavy metal is strengthened.
The reaction mechanism of heavy metal stabilizer process heavy-metal contaminated soil of the present invention is as follows:
Heavy metal stabilizer of the present invention and water mixing, add water mixing, add in contaminated soil, in medicament, phosphate anion, calcium ion, chlorion and zeolite react, and the adsorptive capacity also increasing heavy metal ion by adding phosphoric acid salt formation lead phosphate precipitation thus reduces the migration and conversion of heavy metal in soil ion; Unslaked lime improves pH value in soil to a certain extent, zeolite to heavy metal-polluted soil stabilization mainly by changing, the physico-chemical property of soil realizes, absorption and the exchange of zeolite surface heavy metal ion is facilitated by the increase of soil pH value, original positively charged ion in heavy metal ion exchanging zeolite, by exchanging the size that new positively charged ion changes zeolite aperture near zeolite aperture, thus give zeolite new absorption property; Be conducive in neutral conditions promoting phosphatic dissolving and heavy metal lead, zinc fixing, Cl
-facilitate the absorption of phosphoric acid salt heavy metal Pb, generate the extremely difficult brown leadd ore decomposed, thus reduce plumbous validity.Unslaked lime mainly realizes by changing pH value in soil the static stabilization of heavy metal in soil, apply unslaked lime in soil after, soil pH value rises, and the variable charge soil of soil surface increases thus facilitates the absorption of gel particles heavy metal ion in soil on the one hand; On the other hand, along with hydrogen ion concentration reduces, hydrogen ion Competition weakens, the main carriers of Adsorption of Heavy Metal Ions in soil, comprise iron and manganese oxides, the organic gel particles that waits is combined with heavy metal ion more firmly, and heavy metal transforms to more stable state system.The present invention also provides a kind of method with above-mentioned heavy metal stabilizer stabilization heavy metal-polluted soil, comprising:
Described heavy metal stabilizer and water are mixed into suspension liquid, described suspension liquid are added in described heavy-metal contaminated soil, fully mixes.
The mass ratio of described heavy metal stabilizer and water is 1:25 ~ 35.
The heavy metal ion of described heavy-metal contaminated soil is Pb
2+, Zn
2+, Cu
2+, Cd
2+in one or more.
Carry out at normal temperatures and pressures during heavy metal stabilizer process contaminated soil of the present invention.
Beneficial effect of the present invention:
1, after using heavy metal stabilizer heavy metal contaminated soil of the present invention to carry out stabilization treatment, the heavy metal ion Steep cencentration of the heavy-metal contaminated soil after stabilization is far below the standard limited value of " Hazardous wastes judging standard leaching characteristic identification " (GB5085.3-2007).
2, the raw materials price of heavy metal stabilizer of the present invention is lower, therefore also reduces the cost of stabilization heavy metal-polluted soil.
3, heavy metal stabilizer stabilization process of the present invention is simple, is mixed by medicament add in soil with water.
4, heavy metal stabilizer of the present invention can realize the high stable of heavy metal, effectively prevents the anti-molten of heavy metal ion and oozes out.
Embodiment
Below by specific embodiment, the present invention is described in further detail; but should be appreciated that; these exemplary embodiments are only for the use of citing; and should not regard as any type of any restriction of real protection scope formation of the present invention, more should not regard as protection scope of the present invention and only be confined to this.
Heavy metal stabilizer is by phosphoric acid salt, and unslaked lime, zeolite powder, Repone K solid phase powder proportionally mixes composition.After heavy metal stabilizer heavy metal contaminated soil carries out stabilization treatment, the heavy metal ion Steep cencentration of the heavy-metal contaminated soil after stabilization, far below the standard limited value of " Hazardous wastes judging standard leaching characteristic identification " (GB5085.3-2007), achieves ambient stable.
Embodiment 1
Choose the sample that Pb contaminated soil is implemented as this, Pb content is 12156.7mg/kg.Each medicament according to mass percent is: potassium primary phosphate 55%, unslaked lime 15%, zeolite powder 25%, Repone K 5% mixes composition heavy metal stabilizer, after being 1::30 stirring and dissolving in mass ratio with water, medicament and sample are the ratio of 1:100 according to mass ratio, add in sample, mix, be placed in room temperature lower 7 days.Sampling drying, experiment Analysis.Adopt upset vibrating type leaching method to carry out toxicity leaching to sample, adopt atomic absorption spectrophotometer to measure the leach liquor before and after process.
In sample heavy metal Pb the process of toxicity leaching concentration before and after concentration be respectively 45.17mg/L, 1.4mg/L, lower than the standard limited value (5mg/L) of " Hazardous wastes judging standard leaching characteristic identification " (GB5085.3-2007).
Embodiment 2
Choose the sample that Zn contaminated soil is implemented as this, Zn content is 2782.6mg/kg.Each medicament according to mass percent is: SODIUM PHOSPHATE, MONOBASIC 50%, unslaked lime 25%, zeolite powder 20%, Repone K 5% mixes composition heavy metal stabilizer, after being 1::35 stirring and dissolving in mass ratio with water, medicament and sample are the ratio of 1:100 according to mass ratio, add in sample, mix, be placed in room temperature lower 7 days.Sampling drying, experiment Analysis.Adopt upset vibrating type leaching method to carry out toxicity leaching to sample, adopt atomic absorption spectrophotometer to measure the leach liquor before and after process.
In sample heavy metal Zn the process of toxicity leaching concentration before and after concentration be respectively 125.31mg/L, 17.3mg/L, lower than the standard limited value (100mg/L) of " Hazardous wastes judging standard leaching characteristic identification " (GB5085.3-2007).
Embodiment 3
Choose the sample that Cd contaminated soil is implemented as this, Cd content is 87.3mg/kg.Each medicament according to mass percent is: SODIUM PHOSPHATE, MONOBASIC 60%, unslaked lime 15%, zeolite powder 20%, Repone K 5% mixes composition heavy metal stabilizer, after being 1::25 stirring and dissolving in mass ratio with water, medicament and sample are the ratio of 1:500 according to mass ratio, add in sample, mix, be placed in room temperature lower 7 days.Sampling drying, experiment Analysis.Adopt upset vibrating type leaching method to carry out toxicity leaching to sample, adopt atomic absorption spectrophotometer to measure the leach liquor before and after process.
In sample, the toxicity leaching concentration concentration before treatment of heavy metal Zn is 4.16mg/L, after 1 process, sample Steep cencentration does not detect, lower than the standard limited value (1mg/L) of " Hazardous wastes judging standard leaching characteristic identification " (GB5085.3-2007).
Claims (5)
1. a heavy metal stabilizer, is characterized in that, the mass percent of its raw material: phosphoric acid salt 50% ~ 60%, unslaked lime 20% ~ 30%, zeolite powder 15% ~ 20%, Repone K 3% ~ 5%.Described phosphoric acid salt is potassium primary phosphate or SODIUM PHOSPHATE, MONOBASIC.
2. the heavy metal stabilizer according to right 1, is characterized in that, described phosphoric acid salt is SODIUM PHOSPHATE, MONOBASIC.
3. the zeolite powder according to right 1, is characterized in that, described zeolite is natural mineral.
4. utilize a method for heavy metal stabilizer process heavy-metal contaminated soil in described in right 1, it is characterized in that, comprising:
Described heavy metal stabilizer and water are mixed into suspension liquid, are added in described heavy-metal contaminated soil by described suspension liquid, fully mix;
The mass ratio of described heavy metal stabilizer and water is 1:25 ~ 35;
The heavy metal ion of described heavy-metal contaminated soil is Pb
2+, Zn
2+, Cu
2+, Cd
2+in one or more.
5. the method for heavy metal stabilizer according to claim 1 and heavy metal stabilizer process heavy-metal contaminated soil according to claim 4, is characterized in that, carry out at normal temperatures and pressures.
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| CN201510412174.3A CN104927871A (en) | 2015-07-14 | 2015-07-14 | Heavy metal stabilizer and method for stabilizing soil heavy metal through same |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344706A (en) * | 2015-12-15 | 2016-02-24 | 四川大学 | Curing agent for lead-contaminated soil remediation and remediation method |
| CN105694902A (en) * | 2016-01-28 | 2016-06-22 | 湖南大学 | Passivator for heavy-metal polluted soil, and preparation method and application thereof |
| CN106424123A (en) * | 2016-12-06 | 2017-02-22 | 重庆理工大学 | Remediation composition and remediation method for lead-polluted soil |
| CN106893590A (en) * | 2017-02-17 | 2017-06-27 | 浩蓝环保股份有限公司 | A kind of heavy metal-polluted soil passivation stabilizer and preparation method thereof and application method |
| CN107652975A (en) * | 2017-10-07 | 2018-02-02 | 马学林 | Three-dimensional silica carbon soil conditioner |
| CN109894467A (en) * | 2017-12-07 | 2019-06-18 | 国家电投集团远达环保工程有限公司重庆科技分公司 | The restorative procedure of lead-contaminated soil |
| CN109913233A (en) * | 2019-04-28 | 2019-06-21 | 湖南省地球物理地球化学勘查院 | A kind of water paddy soil heavy metal passivation modifying agent |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965116A (en) * | 2012-11-14 | 2013-03-13 | 浙江省环境保护科学设计研究院 | Heavy metal stabilizing agent and method for treating heavy metal contaminated soil by using same |
| CN104403675A (en) * | 2014-09-28 | 2015-03-11 | 上海化工研究院 | Soil repairing agent used for fixing heavy metal element in polluted soil, preparation method and application thereof |
-
2015
- 2015-07-14 CN CN201510412174.3A patent/CN104927871A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965116A (en) * | 2012-11-14 | 2013-03-13 | 浙江省环境保护科学设计研究院 | Heavy metal stabilizing agent and method for treating heavy metal contaminated soil by using same |
| CN104403675A (en) * | 2014-09-28 | 2015-03-11 | 上海化工研究院 | Soil repairing agent used for fixing heavy metal element in polluted soil, preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 赵述华等: "重金属污染土壤的固化/稳定化处理技术研究进展", 《土壤通报》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344706A (en) * | 2015-12-15 | 2016-02-24 | 四川大学 | Curing agent for lead-contaminated soil remediation and remediation method |
| CN105344706B (en) * | 2015-12-15 | 2018-05-18 | 四川大学 | For the curing agent and restorative procedure of lead-contaminated soil reparation |
| CN105694902A (en) * | 2016-01-28 | 2016-06-22 | 湖南大学 | Passivator for heavy-metal polluted soil, and preparation method and application thereof |
| CN105694902B (en) * | 2016-01-28 | 2019-03-05 | 湖南大学 | Passivator and its preparation method and application for heavy-metal contaminated soil |
| CN106424123A (en) * | 2016-12-06 | 2017-02-22 | 重庆理工大学 | Remediation composition and remediation method for lead-polluted soil |
| CN106424123B (en) * | 2016-12-06 | 2019-07-30 | 重庆理工大学 | Remediation composition and restorative procedure for lead-contaminated soil |
| CN106893590A (en) * | 2017-02-17 | 2017-06-27 | 浩蓝环保股份有限公司 | A kind of heavy metal-polluted soil passivation stabilizer and preparation method thereof and application method |
| CN107652975A (en) * | 2017-10-07 | 2018-02-02 | 马学林 | Three-dimensional silica carbon soil conditioner |
| CN109894467A (en) * | 2017-12-07 | 2019-06-18 | 国家电投集团远达环保工程有限公司重庆科技分公司 | The restorative procedure of lead-contaminated soil |
| CN109913233A (en) * | 2019-04-28 | 2019-06-21 | 湖南省地球物理地球化学勘查院 | A kind of water paddy soil heavy metal passivation modifying agent |
| CN109913233B (en) * | 2019-04-28 | 2024-02-02 | 湖南省地球物理地球化学调查所 | Rice field soil heavy metal passivation modifier |
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