CN1810398A - Method of treating lead contaminated soil with bone charcoal - Google Patents
Method of treating lead contaminated soil with bone charcoal Download PDFInfo
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- CN1810398A CN1810398A CN 200510006261 CN200510006261A CN1810398A CN 1810398 A CN1810398 A CN 1810398A CN 200510006261 CN200510006261 CN 200510006261 CN 200510006261 A CN200510006261 A CN 200510006261A CN 1810398 A CN1810398 A CN 1810398A
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- bone black
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Abstract
The method of treating lead contaminated soil with bone charcoal is to use bone charcoal with wide source and low cost in chemical reaction with lead in soil to form stable compound, so as to lower biologically effective lead content in soil, reduce the absorption and accumulation of plant root system and treat lead contamination of soil. Specifically, bone charcoal is crushed into powder of 300-350 mesh and buried into soil in the amount of 2-16 g each kg soil.
Description
Affiliated field
The invention belongs to the improvement and the recovery technique of heavy-metal contaminated soil, relate in particular to a kind of method of utilizing bone black to administer lead-contaminated soil.
Background technology
Owing to carry out using in a large number of the unreasonable exploitation of sewage irrigation and mud are used, human activity causes atmospheric sedimentation, mineral resources and chemical fertilizer, agricultural chemicals etc. for a long time, cause heavy metal pollution of soil to be on the rise.The vegetable field soil in outskirts of a town such as China Shanghai, Guangzhou, Tianjin, Shenyang, Xi'an all is subjected to the pollution of heavy metal Pb, Cd, Hg etc.At present, China is subjected to the cultivated area nearly 2.0 * 10 of heavy metal pollutions such as Cd, As, Pb, Hg, Zn
7Hm
2, account for 1/5th of total area under cultivation; Wherein industry " three wastes " is polluted and is ploughed 1.0 * 10
7Hm
2, the farmland area 3.3 * 10 of sewage irrigation
7Hm
2Heavy metal pollution of soil not only influences the physicochemical property of farmland and forest soil, makes the soil texture become bad, and heavy metal pollution also poisons the various biological growths in farmland and the forest ecosystem, influences grain yield.China surpasses 1.0 * 10 because of the heavy metal pollution underproduction grain every year
7T, contaminated by heavy metals in addition grain also reaches 1.2 * 10 every year
7T, the economic loss that causes thus total is at least 20,000,000,000 yuan.Heavy metal in the soil absorbed by crops, forest, animal and enrichment after, thereby can enter human body harm humans health through food chain.After for example heavy metal lead enters human body, become the plumbous and glycerine lead plumbate of soluble phosphoric acid hydrogen through reaction in blood, wherein 96% combine with red blood cell rapidly, 4% stays in the blood plasma and combines with hemoglobin.Mainly be distributed in liver,kidney,spleen, the brain by blood circulation lead, the highest with liver, kidney concentration especially.The lead of the last overwhelming majority is all transferred in the bone and is formed the lead phosphate of slightly solubility.Plumbous nervous system, digestive system, reproductive system and bone hematopoiesis functions etc. to human body all produce toxic action.Lead is called as " killer of children's intelligence ", and it can be entered in the fetus body by parent by placenta, causes the congenital Disease in Infants lead load of infant to increase.Because children's brain is in the quick stage of development of nervous system, and lead is had specific sensibility, lead is easily put aside in brain, thereby causes child development slow, the defective on the intelligence occurs.
The improvement method of heavy-metal contaminated soil mainly contains: 1) physics method comprises casting, soil removal and replacement, goes measures such as table soil, soil moved in to improve the original, deep ploughing are digged, drip washing, electrochemical process; 2) chemical method comprises oxidation, reduction, precipitation, absorption, antagonism method etc.; 2) bioanalysis utilizes some animal, plant and microorganism that pollutant is carried out absorption and accumulation and Degradation and Transformation.Have certain improved effect though this several method is administered heavy metal pollution of soil, also there is bigger limitation in they.For example physics method cost of investment more greatly, easily causes secondary pollution, destroys degradation under soil texture, the soil fertility; Phytoremediation technology belongs to the category of biological restoration, also is current people's research focus.Up to now, people screen 400 various heavy hyperaccumulative plants from occurring in nature, mostly are crucifer, and wherein the hyperaccumulative plant of nickel has 277 kinds approximately, and they can be used as the kind of paying the utmost attention to of restoration of soil polluted by heavy metal.Though phytoremediation technology is low with its cost, do not destroy soil texture and do not cause advantages such as secondary pollution and enjoy people to praise highly, but at present the most of plant of finding of hyperaccumulative plant are short and small, poor growth, biomass are less, are difficult to use in actual production.In a word, be used for the practicality of restoration of soil polluted by heavy metal, reliable and ripe method and technology is less.Therefore, the improvement technology of seeking efficient, economic, practical heavy-metal contaminated soil becomes one of top-priority problem of current people.
EPA is decided to be a kind of improvement technology of affirmation with solidification and static stabilization (Solidification/Stabilization (S/S)), and selects the improvement technology of S/S as 25% super fund administration project.So-called S/S technology is contaminated soil to be dug out to be placed on certain treatment facility from the scene handle, contaminated soil, deposit or mud are mixed with certain adhesive, by adhesive the heavy metal in soil, the deposit is fixed, made its environmental transport and transfer no longer towards periphery.At present, the S/S technology also has been used to administer near the pollution of the lead/sour battery discarded object of highway.
Be used for the practicality of restoration of soil polluted by heavy metal at present, reliable and ripe method and technology is few, the improvement technology of inquiring into efficient, economic, practical heavy-metal contaminated soil will be one of pendulum important topic in face of people.
Bone black is used for removing the existing more report of fluoride of drinking water at home and abroad, and is becoming the technology of comparative maturity, but utilizes bone black to carry out the repairing and treating of heavy metal (lead) contaminated soil, and not seeing as yet so far has report.Bone black is that economic worth is cheap by the product of animal skeleton after whole organic matters are removed in charing, considers all to have very high practical value and application prospect from governance efficiency, control expense, on-the-spot operability and environmental risk aspect.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing bone black to administer lead-contaminated soil, the present invention adopt material source extensively, be worth cheap bone black and the lead generation chemical reaction (precipitation, absorption, complexing, OR etc.) in the soil environment, form stable compound, reduce biological effectiveness plumbous in the soil, thereby reduce absorption and the accumulation of root system of plant, to reach the purpose of administering the soil lead contamination to lead.
Concrete grammar of the present invention is that bone black is made 300-350 purpose powder, in the ratio of 2-16 gram/kilogram soil bone black being placed into the soil.
Description of drawings
Fig. 1 is the adsorption isotherm schematic diagram of bone black to lead.
Fig. 2 is the influence schematic diagram of bone black to the plumbous metamorphosis of contaminated soil, wherein: Exch.=exchangeable species lead; Carb.=carbonate is in conjunction with attitude lead; Fe/Mn=Fe-Mn oxide lead; The OM=organic matter is in conjunction with attitude lead; The remaining attitude lead of Resid.=.
The specific embodiment
Need to prove, therefore do not do any explanation to how preparing bone black because the bone black that the present invention adopts is the commodity bone black.
Be to be that example describes among the following embodiment, but the adoptable bone black of the present invention is not limited only to for example two kinds with the bone black that derives from Britain's (Brimac of Britain Brimac company 216 type bone black) and China Zhejiang Province (production of the Sai Dafu of Zhejiang Province company).
Embodiment
This example adopts the bone black in Britain and China Zhejiang Province to be applied to lead-contaminated soil, studies its influence to the plant absorbing heavy metal lead.
Above-mentioned two kinds of bone black are ground to form 320 orders (300-350 order all can) respectively, for be convenient to narration in form described later and accompanying drawing, are conventional letter with E with Britain's bone black, and Chinese Zhejiang Province bone black is conventional letter with C.Before using, all repeatedly washes bone black with deionized water, till the pH of bone black value and deionized water are approaching, and standby after 105 ℃ temperature is dried 24 hours;
Gather the soil of lead contamination, lead content 313.2mg kg
-1, air-dry, grind, cross the 2-mm sieve, in order to experimental applications.
Plant is Chinese mustard.
A, plumbous adsorption test
Take by weighing the above-mentioned two kinds of bone black of 0.5g respectively in the 50mL plastic centrifuge tube, add the Pb (NO of 30mL variable concentrations
3)
2Solution.With 0.01molL
-1KNO
3As supporting electrolyte, regulating pH is 5.0, and the initial concentration series that makes Pb is 2000,3000,3500,4000,4500 and 5000mgL
-1Each is handled 3 times and repeats.To add excellent centrifuge tube and build and seal, the constant temperature vibration is 24 hours under 25 ℃ of conditions.Static, centrifugal (10000r.min
-1) 5 minutes, filter, measure Pb concentration in the soil liquid with the FAAS method.Calculate P in soil b adsorbance according to the concentration difference of Pb in initial liquid and the equilibrium liquid.
B, contaminated soil managemental experiment
Test is established 9 processing by the consumption difference of bone black: 0 (blank, CK); Britain's bone black 2.0 (E-1), 4.0 (E-2), 8.0 (E-3), 16.0 (E-4) g.kg
-1Soil; China Zhejiang bone black 2.0 (C-1), 4.0 (C-2), 8.0 (C-3), 16.0 (C-4) g.kg
-1Soil (illustrate: symbol E-1......E-4, the C-1......C4j behind the bone black is for the ease of narrating in form described later and accompanying drawing, and the conventional letter that the different addition of bone black is set).Test is little plastic tub with basin, and every basin is adorned native 1kg.China's mustard seed is transplanted in the engagement after vernalization.Every basin adds the fertile 0.2g N of N kg with the form of solution
-1The fertile 0.125g K of soil (ammonium sulfate) and K kg
-1Soil (potassium chloride).Test repeats 4 times, totally 36 basins.Keep the skin wet to crop with deionized water every day, makes soil moisture reach about 60% of field capacity.Test is carried out incubation time 2 months in that the artificial climate that can regulate illumination and temperature is indoor.Dry under 70 ℃ temperature plant results back.Plant and pedotheque are cleared up with nitric acid-perchloric acid method, with the Pb content in ICP-OES (inductively coupled plasma atomic emission spectrometry instrument) working sample.
Through above-mentioned experiment, effect of the present invention please refer to Fig. 1.Because the Main Ingredients and Appearance of bone black is hydroxyapatite (Ca
10(PO
4)
6(OH)
2), so bone black mainly is the decomposition-precipitation process of hydroxyapatite to lead to the absorption mechanism of lead.
Bone black is used in lead-contaminated soil, can find that bone black can obviously reduce the lead content in Chinese mustard root system and the cauline leaf, and along with the increase effect remarkable more (table 1) of consumption.When the consumption of Chinese Zhejiang bone black is 16.0g.kg
-1During soil, the lead content in Chinese mustard cauline leaf and the root system reduces 45.8 and 30.2% than the processing of not executing bone black respectively; And when executing the Britain bone black of equal number, the lead content in cauline leaf and the root system reduces 56.0 and 75.9% respectively.Contaminated soil is carried out continuous lixiviate, found that these two kinds of bone black have the lead that makes in the soil by the function (Fig. 2) of non-remaining attitude to remaining attitude transformation.In the processing of not executing bone black, mainly there be (accounting for total plumbous 55.4%) with organic matter in the lead in the soil in conjunction with attitude and Fe-Mn oxide form.When the bone black that adds different amounts and after cultivating 85 days, the exchangeable species lead in the soil is all compared according to reducing.During the large usage quantity of bone black (E-3, E-4, C-3 and C-4 handle), the lead in the soil changes to remaining attitude from non-remaining attitude significantly.Such as, the remaining attitude lead when not adding bone black in the soil accounts for 39.2% of total lead content, adds 16.0g.kg respectively
-1When Britain's bone black of soil and Chinese Zhejiang bone black, the ratio of remaining attitude lead is increased to 82.8 and 82.7% respectively.Therefore, the present invention utilizes bone black to can be used as a kind of comparatively ideal material of remediating lead-contaminated soil, and it can reduce biological effectiveness plumbous in the soil, reduces the absorption and the accumulation of plant to lead.In addition, bone black also makes stability plumbous in the soil increase, thereby helps the original position reparation to lead-contaminated soil.
Table 1 bone black absorbs plumbous (mg kg to Chinese mustard
-1) influence
| Handle | Cauline leaf | Root |
| CK E-1 E-2 E-3 E-4 C-1 C-2 C-3 C-4 | 4.45±0.06a 3.85±0.11a 3.61±0.62b 3.31±0.27c 1.97±0.10d 4.13±0.13a 3.96±0.05b 3.01±0.11c 2.04±0.07d | 27.81±0.70a 23.24±1.29b 14.86±0.83c 7.75±0.46d 6.72±0.51d 23.65±0.82b 16.84±0.72c 8.75±0.92d 8.42±0.53d |
Annotate: the alphabetical identical person of data back is that difference is not remarkable, and different alphabetical persons are for reaching the level of signifiance of p＜0.05.
Claims (3)
1. a method of utilizing bone black to administer lead-contaminated soil is made 300-350 purpose powder with bone black, in the ratio of 2-16 gram/kilogram soil bone black being placed into the soil.
2. the method for claim 1 is characterized in that, described bone black is made 320 order powder.
3. the method for claim 1 is characterized in that, described bone black is Britain and Chinese bone black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510006261 CN1810398A (en) | 2005-01-27 | 2005-01-27 | Method of treating lead contaminated soil with bone charcoal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510006261 CN1810398A (en) | 2005-01-27 | 2005-01-27 | Method of treating lead contaminated soil with bone charcoal |
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| Publication Number | Publication Date |
|---|---|
| CN1810398A true CN1810398A (en) | 2006-08-02 |
Family
ID=36843594
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|---|---|---|---|
| CN 200510006261 Pending CN1810398A (en) | 2005-01-27 | 2005-01-27 | Method of treating lead contaminated soil with bone charcoal |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465137C (en) * | 2007-01-10 | 2009-03-04 | 南京大学 | Regulation and control agent in use for treating soil polluted by heavy metals |
| CN104399222A (en) * | 2014-12-02 | 2015-03-11 | 爱土工程环境科技有限公司 | Composite biomass charcoal waste incineration fly ash treatment stabilizer and preparation method thereof |
| CN104609946A (en) * | 2014-12-30 | 2015-05-13 | 杭州师范大学 | Composite controlled retarder for soil heavy metal pollution of vegetable field and application thereof |
| CN106623409A (en) * | 2016-12-27 | 2017-05-10 | 常州大学 | Curing agent repair technology for stabilizing organic matter chlorine benzene polluted plantation soil |
| CN106753387A (en) * | 2016-11-11 | 2017-05-31 | 南京农业大学 | A kind of rich phosphorus biomass carbon for suppressing crop absorption lead cadmium and preparation method thereof |
| CN109233854A (en) * | 2018-10-09 | 2019-01-18 | 农业部环境保护科研监测所 | A kind of application in modifying agent and preparation method thereof and As contaminated soil remediation |
| CN110373197A (en) * | 2019-07-25 | 2019-10-25 | 中国林业科学研究院亚热带林业研究所 | A kind of soil passivator, preparation method and application |
| CN110373198A (en) * | 2019-07-25 | 2019-10-25 | 中国林业科学研究院亚热带林业研究所 | A kind of bone black composite material, preparation method and application |
-
2005
- 2005-01-27 CN CN 200510006261 patent/CN1810398A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465137C (en) * | 2007-01-10 | 2009-03-04 | 南京大学 | Regulation and control agent in use for treating soil polluted by heavy metals |
| CN104399222A (en) * | 2014-12-02 | 2015-03-11 | 爱土工程环境科技有限公司 | Composite biomass charcoal waste incineration fly ash treatment stabilizer and preparation method thereof |
| CN104399222B (en) * | 2014-12-02 | 2018-01-23 | 爱土工程环境科技有限公司 | Composite biomass charcoal domestic garbage incineration flyash processing stabilizer and preparation method thereof |
| CN104609946A (en) * | 2014-12-30 | 2015-05-13 | 杭州师范大学 | Composite controlled retarder for soil heavy metal pollution of vegetable field and application thereof |
| CN106753387A (en) * | 2016-11-11 | 2017-05-31 | 南京农业大学 | A kind of rich phosphorus biomass carbon for suppressing crop absorption lead cadmium and preparation method thereof |
| CN106623409A (en) * | 2016-12-27 | 2017-05-10 | 常州大学 | Curing agent repair technology for stabilizing organic matter chlorine benzene polluted plantation soil |
| CN109233854A (en) * | 2018-10-09 | 2019-01-18 | 农业部环境保护科研监测所 | A kind of application in modifying agent and preparation method thereof and As contaminated soil remediation |
| CN110373197A (en) * | 2019-07-25 | 2019-10-25 | 中国林业科学研究院亚热带林业研究所 | A kind of soil passivator, preparation method and application |
| CN110373198A (en) * | 2019-07-25 | 2019-10-25 | 中国林业科学研究院亚热带林业研究所 | A kind of bone black composite material, preparation method and application |
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