CN105733602A - Heavy metal cadmium and lead composite polluted soil restoration agent and preparing method thereof - Google Patents
Heavy metal cadmium and lead composite polluted soil restoration agent and preparing method thereof Download PDFInfo
- Publication number
- CN105733602A CN105733602A CN201610081192.2A CN201610081192A CN105733602A CN 105733602 A CN105733602 A CN 105733602A CN 201610081192 A CN201610081192 A CN 201610081192A CN 105733602 A CN105733602 A CN 105733602A
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- soil
- heavy metal
- starch
- chitosan
- kieselguhr
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
Abstract
The invention provides a heavy metal cadmium and lead composite polluted soil restoration agent.The restoration agent is prepared from, by weight, 30-50% of biomass charcoal, 5-10% of kieselguhr, 20-30% of ferrous sulfate, 5-10% of starch and 10-20% of chitosan.According to the preparing method, the biomass charcoal, the kieselguhr, ferrous sulfate, the starch and chitosan are mixed according to the mass ratio, and stirred fully and uniformly to obtain the prepared soil restoration agent.The prepared soil restoration agent has a good effect when restoring cadmium and lead composite polluted soil.
Description
Technical field:
The invention belongs to soil pollution recovery technique field, be specifically related to a kind of heavy metal cadmium lead combined contamination soil
Renovation agent and preparation method thereof.
Technical background:
" whole nation Soil Pollution Investigation publication " within 2014, is announced aobvious according to Environmental Protection Department and Ministry of Land and Resources
Show: whole nation soil environment situation totally allows of no optimist, and some areas soil pollution is heavier, arable soil environment matter
Amount causes anxiety, industry and mining discarded ground soil environment outstanding problem.The human activity such as industry and mining, agricultural and soil ring
Border background value height is to cause soil pollution or the main cause exceeded standard.The whole nation total exceeding standard rate of soil is 16.1%,
Wherein slight, slight, moderate and serious pollution point position ratio are respectively 11.2%, 2.3%, 1.5% and 1.1%.
Pollution type is based on inorganic type, and organic type takes second place, and compound pollution proportion is less, and inorganic pollution exceeds standard a little
Figure place accounts for the 82.8% of all super punctuation bits.
From polluting in terms of distribution situation, soils in south china pollutes and overweights the north；Yangtze River Delta, the Delta of the Pearl River, east
The subregion soil contamination problem such as old industrial bases, north are the most prominent, and southwest, variable charge soil heavy metal surpass
Mark scope is bigger；Cadmium, hydrargyrum, arsenic, 4 kinds of level of inorganic contaminants distributions of lead present from northwest to the southeast, from east
The situation that north gradually rises to southwestward.
Major pollutants are cadmium, nickel, copper, arsenic, hydrargyrum, lead, clofenotane and polycyclic aromatic hydrocarbon.If it is complete with second time
State's soil survey result is as the criterion, and China's arable land latest data is 2,030,770,000 mu and calculates, middle serious pollution
Cultivated area accounts for 2.9%, has reached 58,890,000 mu.
Administering method currently for heavy metal pollution of soil mainly has immobilization/stabilisation, elution method, washes soil
, totally there is remediation efficiency in method, electromotion repairing technique method, chemical reduction method, phytoremediation, microorganism remediation
The problems such as low, processing cost is high.The quantities such as traditional restorative procedure such as landfill, drip washing, electrochemistry are big, become
This height and frequently result in Soil structure destroy and some nutrient lose.Therefore, exploitation one low cost,
Simply, soil remediation medicament efficient, eco-friendly is significant.
Chemical passivation stabilisation renovation agent is the controlling area-source pollution technology of a kind of high-efficiency and economic, and this technology also complies with
The needs of China's sustainable development.
Summary of the invention
The technical problem to be solved be to provide a kind of heavy metal cadmium lead combined contamination soil renovation agent and
Its preparation method, the present invention uses biomass carbon, kieselguhr, ferrous sulfate, starch, chitosan to mix in proportion
Close, make soil-repairing agent, add to by a certain percentage in heavy-metal contaminated soil according to pollution level, pass through
The synergism such as absorption, ion exchange, chelating react with the heavy metal in soil, make heavy metal be formed surely
Fixed chemical form, stops its environmental transport and transfer and diffusion, reduces heavy metal murder by poisoning degree in the environment.
For solving above-mentioned technical problem, the invention provides a kind of heavy metal cadmium lead combined contamination soil renovation agent,
Its raw material is made up of biomass carbon, kieselguhr, ferrous sulfate, starch, chitosan, described soil-repairing agent
The percentage by weight of each raw material is:
Biomass carbon 30-50%；
Kieselguhr 5-10%；
Ferrous sulfate 20-30%；
Starch 5-10%；
Chitosan 10-20%；
The mass percent sum of each raw material is 100%.
Further, in described renovation agent, the mass percent of each raw material is:
Biomass carbon 45%；
Kieselguhr 10%；
Ferrous sulfate 25%；
Starch 10%；
Chitosan 10%；
One heavy metal cadmium lead combined contamination soil renovation agent of the present invention, described biomass carbon is with straw and oxygen
Change calcium mixture be raw material, the mass ratio of described straw and calcium oxide is 20:1, system pressure be 20kPa,
Pyrolysis temperature be 500 DEG C under conditions of vacuum pyrolysis 30min, the particle diameter obtained by milled processed be 3mm with
Under pressed powder；
Described kieselguhr, ferrous sulfate, starch, chitosan are respectively the pressed powder of below 2mm；
The preparation method of the present invention a kind of heavy metal cadmium lead combined contamination soil renovation agent, by by biomass carbon,
Kieselguhr, ferrous sulfate, starch, chitosan stir according to the above ratio, i.e. obtain repairing medicament.
One heavy metal cadmium lead combined contamination soil renovation agent of the present invention, after obtaining mixture by said process, adds
It is added in heavy-metal contaminated soil, the 1-10% that reparation pharmaceutical quantities is contaminated soil weight added, then sprays
A small amount of water makes Soil conservation moisten.
This medicament may be used for the improvement of single heavy metal contaminated soil, is also applied for controlling of Compound Heavy Metals
Reason, it is adaptable to large area heavy-metal contaminated soil is repaired, the mine including heavy metal pollution is repaired and heavy metal
Use the reparation of manufacturing enterprise's contaminated site.Compared with prior art, the reparation medicament of the present invention has preparation side
The advantage that method is simple, feasible, regulation effect is good.
Relative to prior art, the beneficial effects of the present invention is:
Biomass carbon in renovation agent is obtained by vacuum pyrolysis biomass, the biomass prepared under vacuum
Charcoal porosity is high, and adsorptive value is high；With biomass such as straws as raw material, make full use of resource, it is to avoid because it burns
Cause environmental pollution.The yield promoting straw charcoal during vacuum pyrolysis by adding calcium oxide increases, logical
Crossing the biomass carbon that vacuum pyrolysis obtains, have specific surface area big, duct is enriched, easily adsorb all kinds of heavy metals from
Son, reduces the concentration of animal migration heavy metal ion in soil；Calcium oxide self in the biomass carbon prepared can make
Soil pH value improves soil surface negative charge and increases, thus the affinity of soil heavy metal increases；On the other hand pH
Value raises, and is also beneficial to the existence of MOH+ and improves the adsorbance of heavy metal ion, promotes heavy metal in soil simultaneously
Form hydroxide or combined state precipitation or co-precipitation.
Chitosan is unique alkaline polysaccharide that nature exists, and it has amido and easily forms quaternary ammonium compound cation, its point
Amino and the hydroxyl adjacent with amino in son can form stable chelate with heavy metal cadmium, have and well remove work
With；
The reducing property of ferrous sulfate is high, and main purpose is to be reduced by bivalence cadmium, soluble in water, low price；
Starch is by the natural polymer of a kind of polysaccharose substance of-glucose polycondensation, is nature source
The renewable material of the abundantest one, degradable, will not be to environment.Its strand also exists and in a large number may be used
The hydroxyl of reaction and glycosidic bond, adsorbable substantial amounts of heavy metal ion；
Except the respective chelating of said components, reduce, precipitate, in addition to adsorption, biomass carbon, diatomaceous
Addition can improve soil physico-chemical property well, is greatly enhanced the permeability of soil；
Synergism is played so that heavy metal leaching rate in soil is substantially reduced, and reaches and excellent by said components
Primary standard in country " standard of soil environment quality " (GB15618-1995).
Detailed description of the invention:
Embodiment 1
Test soil collecting content of beary metal in certain heavy metal pollution region, this regional soil top layer is higher than " soil
Environmental quality standards " grade III Standard of (GB15618-1995).Practical situation according to polluting is repaired:
A (), sampling from soil, detection is according to solid waste " Leaching leaching method sulfonitric method "
(HJ/T299-2007) use turnover oscillator that soil is carried out leaching test, detect preprosthetic heavy metal-polluted soil concentration；
B prepared by (), soil-repairing agent: with the mixture of straw and calcium oxide as raw material, described straw and calcium oxide
Mass ratio be 20:1, system pressure be 20kPa, pyrolysis temperature be 500 DEG C under conditions of vacuum pyrolysis
30min, the biomass carbon powder that particle diameter is below 3mm obtained by milled processed；Produce particle diameter to be less than
The kieselguhr of the powder of 2mm, ferrous sulfate, starch, chitosan；
The mass percent of each raw material is:
Biomass carbon 45%；
Kieselguhr 10%；
Ferrous sulfate 25%；
Starch 10%；
Chitosan 10%；
By biomass carbon, kieselguhr, ferrous sulfate, starch, chitosan are stirred according to the above ratio,
I.e. obtain repairing medicament.
(c), the heavy-metal contaminated soil of 10kg is dug out, send into crusher in crushing, be delivered to mix through belt
Clutch, is sufficiently mixed the reparation medicament for soil quality 10% with contaminated soil, in mixed process, sprays
A small amount of water makes Soil conservation moisten, and stands 10 days after mixing, i.e. completes to repair.
D (), effect detection: sample the soil after repairing, detection is according to solid waste " Leaching leaching method
Sulfonitric method " (HJ/T299-2007) use turnover oscillator that soil carries out leaching test, detection repair after soil
Earth heavy metal concentration, result is as shown in table 1:
Table 1
| Embodiment 1 | Cadmium (Cd) | Lead (Pb) |
| Before process (mg/kg) | 35.96 | 556.7 |
| After process (mg/kg) | 0.0090 | 0.0612 |
Cadmium in Soil after reparation, lead content meet the one-level mark of " standard of soil environment quality " (GB15618-1995)
Accurate.
Embodiment 2
Test soil collecting content of beary metal in certain heavy metal pollution region, this regional soil top layer is higher than " soil
Environmental quality standards " grade III Standard of (GB15618-1995).Practical situation according to polluting is repaired:
A (), sampling from soil, detection is according to solid waste " Leaching leaching method sulfonitric method "
(HJ/T299-2007) use turnover oscillator that soil is carried out leaching test, detect preprosthetic heavy metal-polluted soil concentration；
B prepared by (), soil-repairing agent: with the mixture of straw and calcium oxide as raw material, described straw and calcium oxide
Mass ratio be 20:1, system pressure be 20kPa, pyrolysis temperature be 500 DEG C under conditions of vacuum pyrolysis
30min, the biomass carbon powder that particle diameter is below 3mm obtained by milled processed；Produce particle diameter to be less than
The kieselguhr of the powder of 2mm, ferrous sulfate, starch, chitosan；
The mass percent of each raw material is:
Biomass carbon 50%；
Kieselguhr 5%；
Ferrous sulfate 20%；
Starch 5%；
Chitosan 20%；
By biomass carbon, kieselguhr, ferrous sulfate, starch, chitosan are stirred according to the above ratio,
I.e. obtain repairing medicament.
(c), the heavy-metal contaminated soil of 10kg is dug out, send into crusher in crushing, be delivered to mix through belt
Clutch, is sufficiently mixed the reparation medicament for soil quality 10% with contaminated soil, in mixed process, sprays
A small amount of water makes Soil conservation moisten, and stands 10 days after mixing, i.e. completes to repair.
D (), effect detection: sample the soil after repairing, detection is according to solid waste " Leaching leaching method
Sulfonitric method " (HJ/T299-2007) use turnover oscillator that soil carries out leaching test, detection repair after soil
Earth heavy metal concentration, result is as shown in table 2:
Table 2
| Embodiment 2 | Cadmium (Cd) | Lead (Pb) |
| Before process (mg/kg) | 33.96 | 553.1 |
| After process (mg/kg) | 0.0190 | 0.0917 |
Cadmium in Soil after reparation, lead content meet the one-level mark of " standard of soil environment quality " (GB15618-1995)
Accurate.
Embodiment 3
Test soil collecting content of beary metal in certain heavy metal pollution region, this regional soil top layer is higher than " soil
Environmental quality standards " grade III Standard of (GB15618-1995).Practical situation according to polluting is repaired:
A (), sampling from soil, detection is according to solid waste " Leaching leaching method sulfonitric method "
(HJ/T299-2007) use turnover oscillator that soil is carried out leaching test, detect preprosthetic heavy metal-polluted soil concentration；
B prepared by (), soil-repairing agent: with the mixture of straw and calcium oxide as raw material, described straw and calcium oxide
Mass ratio be 20:1, system pressure be 20kPa, pyrolysis temperature be 500 DEG C under conditions of vacuum pyrolysis
30min, the biomass carbon powder that particle diameter is below 3mm obtained by milled processed；Produce particle diameter to be less than
The kieselguhr of the powder of 2mm, ferrous sulfate, starch, chitosan；
The mass percent of each raw material is:
Biomass carbon 30%；
Kieselguhr 10%；
Ferrous sulfate 30%；
Starch 10%；
Chitosan 20%；
By biomass carbon, kieselguhr, ferrous sulfate, starch, chitosan are stirred according to the above ratio,
I.e. obtain repairing medicament.
(c), the heavy-metal contaminated soil of 10kg is dug out, send into crusher in crushing, be delivered to mix through belt
Clutch, is sufficiently mixed the reparation medicament for soil quality 10% with contaminated soil, in mixed process, sprays
A small amount of water makes Soil conservation moisten, and stands 10 days after mixing, i.e. completes to repair.
D (), effect detection: sample the soil after repairing, detection is according to solid waste " Leaching leaching method
Sulfonitric method " (HJ/T299-2007) use turnover oscillator that soil carries out leaching test, detection repair after soil
Earth heavy metal concentration, result is as shown in table 3:
Table 3
| Embodiment 3 | Cadmium (Cd) | Lead (Pb) |
| Before process (mg/kg) | 34.83 | 551.9 |
| After process (mg/kg) | 0.0210 | 0.0612 |
Cadmium in Soil after reparation, lead content meet the one-level mark of " standard of soil environment quality " (GB15618-1995)
Accurate.
Claims (5)
1. a heavy metal cadmium lead combined contamination soil renovation agent, it is characterised in that: its raw material by biomass carbon,
Kieselguhr, ferrous sulfate, starch, chitosan form, the percentage by weight of each raw material of described soil-repairing agent
For:
Biomass carbon 30-50%；
Kieselguhr 5-10%；
Ferrous sulfate 20-30%；
Starch 5-10%；
Chitosan 10-20%；
The mass percent sum of each raw material is 100%.
A kind of heavy metal cadmium lead combined contamination soil renovation agent the most according to claim 1, its feature exists
In: the mass percent of each raw material of described soil-repairing agent is:
Biomass carbon 45%；
Kieselguhr 10%；
Ferrous sulfate 25%；
Starch 10%；
Chitosan 10%.
A kind of heavy metal cadmium lead combined contamination soil renovation agent the most according to claim 1 and 2, its feature
It is: described biomass carbon is with the mixture of straw and calcium oxide as raw material, described straw and calcium oxide
Mass ratio is 20:1, system pressure be 20kPa, pyrolysis temperature be 500 DEG C under conditions of vacuum pyrolysis 30min,
The pressed powder that particle diameter is below 3mm obtained by milled processed.
A kind of heavy metal cadmium lead combined contamination soil renovation agent the most according to claim 1 and 2, its feature
It is: described kieselguhr, ferrous sulfate, starch, chitosan are the pressed powder of below 2mm.
5. the system of a kind of heavy metal cadmium lead combined contamination soil renovation agent described in Claims 1-4 any one
Preparation Method, it is characterised in that: by biomass carbon, kieselguhr, ferrous sulfate, starch, chitosan by corresponding
Mass ratio stirs, and obtains the soil-repairing agent of preparation.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106118684A (en) * | 2016-07-08 | 2016-11-16 | 张丽英 | A kind of lead-contaminated soil renovation agent and preparation method thereof |
| CN106622190A (en) * | 2016-12-07 | 2017-05-10 | 郑州源冉生物技术有限公司 | Heavy-metal composite adsorption material based on diatomite and preparation method of heavy-metal composite adsorption material |
| CN106669641A (en) * | 2016-12-07 | 2017-05-17 | 郑州源冉生物技术有限公司 | Kanuma soil-based heavy metal composite adsorption material and preparation method thereof |
| CN107502359A (en) * | 2017-08-18 | 2017-12-22 | 中山市绿浪助剂有限公司 | A kind of microbe soil restoration agent |
| CN107603633A (en) * | 2017-09-08 | 2018-01-19 | 广西大学 | A kind of cadmium pollution soil organo-mineral complexing passivator and its application method |
| CN109054848A (en) * | 2018-07-06 | 2018-12-21 | 北京润鸣环境科技有限公司 | A kind of heavy-metal contaminated soil renovation agent and preparation method thereof and application method |
| CN110699086A (en) * | 2019-09-18 | 2020-01-17 | 东华工程科技股份有限公司 | Soil remediation agent with rice straw biomass charcoal as raw material and production method thereof |
| CN110922978A (en) * | 2019-12-10 | 2020-03-27 | 四川长虹格润环保科技股份有限公司 | Passivator for treating acid soil with light and below cadmium pollution |
| CN112457864A (en) * | 2020-12-28 | 2021-03-09 | 青岛博智汇力生物科技有限公司 | Repairing agent for repairing heavy metal contaminated soil and preparation method thereof |
| CN114591746A (en) * | 2022-02-23 | 2022-06-07 | 河北工业大学 | Modified material for temperature stability of heavy metal contaminated soil and low-carbon treatment method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106118684A (en) * | 2016-07-08 | 2016-11-16 | 张丽英 | A kind of lead-contaminated soil renovation agent and preparation method thereof |
| CN106622190A (en) * | 2016-12-07 | 2017-05-10 | 郑州源冉生物技术有限公司 | Heavy-metal composite adsorption material based on diatomite and preparation method of heavy-metal composite adsorption material |
| CN106669641A (en) * | 2016-12-07 | 2017-05-17 | 郑州源冉生物技术有限公司 | Kanuma soil-based heavy metal composite adsorption material and preparation method thereof |
| CN107502359A (en) * | 2017-08-18 | 2017-12-22 | 中山市绿浪助剂有限公司 | A kind of microbe soil restoration agent |
| CN107603633A (en) * | 2017-09-08 | 2018-01-19 | 广西大学 | A kind of cadmium pollution soil organo-mineral complexing passivator and its application method |
| CN109054848A (en) * | 2018-07-06 | 2018-12-21 | 北京润鸣环境科技有限公司 | A kind of heavy-metal contaminated soil renovation agent and preparation method thereof and application method |
| CN110699086A (en) * | 2019-09-18 | 2020-01-17 | 东华工程科技股份有限公司 | Soil remediation agent with rice straw biomass charcoal as raw material and production method thereof |
| CN110922978A (en) * | 2019-12-10 | 2020-03-27 | 四川长虹格润环保科技股份有限公司 | Passivator for treating acid soil with light and below cadmium pollution |
| CN112457864A (en) * | 2020-12-28 | 2021-03-09 | 青岛博智汇力生物科技有限公司 | Repairing agent for repairing heavy metal contaminated soil and preparation method thereof |
| CN114591746A (en) * | 2022-02-23 | 2022-06-07 | 河北工业大学 | Modified material for temperature stability of heavy metal contaminated soil and low-carbon treatment method |
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Effective date of registration: 20161213 Address after: 410100 Hunan province Changsha Changsha City Economic and Technological Development Zone Bancang Road No. 29 new Changhai center service outsourcing base 3 A block 2 building 204 Applicant after: Changsha convergent Environment Technology Co., Ltd. Address before: 410100 Hunan Province, Changsha County city Xingsha street Changsha sealing knife Ridge Community Kaiyuan Road No. 65 Building 2 building 1803 Garden Applicant before: Zhou Yihui |
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160706 |