CN101003452A - Regulation and control agent in use for treating soil polluted by heavy metals - Google Patents
Regulation and control agent in use for treating soil polluted by heavy metals Download PDFInfo
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- CN101003452A CN101003452A CNA2007100192641A CN200710019264A CN101003452A CN 101003452 A CN101003452 A CN 101003452A CN A2007100192641 A CNA2007100192641 A CN A2007100192641A CN 200710019264 A CN200710019264 A CN 200710019264A CN 101003452 A CN101003452 A CN 101003452A
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- Prior art keywords
- control agent
- adjusting control
- soil
- heavy
- contaminated soil
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- 239000002689 soil Substances 0.000 title claims abstract description 103
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 title claims description 102
- 230000033228 biological regulation Effects 0.000 title description 6
- 238000000034 method Methods 0.000 claims abstract description 23
- 229910052796 boron Inorganic materials 0.000 claims abstract description 22
- 239000003337 fertilizer Substances 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 17
- 238000002360 preparation method Methods 0.000 claims abstract description 17
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 14
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 10
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 34
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 16
- 239000011701 zinc Substances 0.000 claims description 15
- 238000009835 boiling Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 239000011573 trace mineral Substances 0.000 claims description 8
- 235000013619 trace mineral Nutrition 0.000 claims description 8
- LAZOHFXCELVBBV-UHFFFAOYSA-N [Mg].[Ca].[Si] Chemical compound [Mg].[Ca].[Si] LAZOHFXCELVBBV-UHFFFAOYSA-N 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000003837 high-temperature calcination Methods 0.000 claims description 6
- 210000001519 tissue Anatomy 0.000 claims description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- 239000011733 molybdenum Substances 0.000 claims description 5
- 229910014497 Ca10(PO4)6(OH)2 Inorganic materials 0.000 claims description 3
- 238000009313 farming Methods 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 15
- 229910052588 hydroxylapatite Inorganic materials 0.000 abstract description 13
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 abstract description 13
- 239000000126 substance Substances 0.000 abstract description 9
- 229910052748 manganese Inorganic materials 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 235000016709 nutrition Nutrition 0.000 abstract description 2
- 230000035764 nutrition Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 15
- 238000004458 analytical method Methods 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 239000011572 manganese Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000000395 magnesium oxide Substances 0.000 description 8
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 8
- 238000003900 soil pollution Methods 0.000 description 8
- 240000001851 Artemisia dracunculus Species 0.000 description 7
- 235000014676 Phragmites communis Nutrition 0.000 description 7
- 241000209140 Triticum Species 0.000 description 7
- 235000021307 Triticum Nutrition 0.000 description 7
- 229910052793 cadmium Inorganic materials 0.000 description 7
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 239000000292 calcium oxide Substances 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000004876 x-ray fluorescence Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 229910002794 Si K Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003359 percent control normalization Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 238000003795 desorption Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 230000029052 metamorphosis Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000834 fixative Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- AMWRITDGCCNYAT-UHFFFAOYSA-L manganese oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 1
- PPNAOCWZXJOHFK-UHFFFAOYSA-N manganese(2+);oxygen(2-) Chemical class [O-2].[Mn+2] PPNAOCWZXJOHFK-UHFFFAOYSA-N 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- TVBSSDNEJWXWFP-UHFFFAOYSA-N nitric acid perchloric acid Chemical compound O[N+]([O-])=O.OCl(=O)(=O)=O TVBSSDNEJWXWFP-UHFFFAOYSA-N 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- -1 polynite Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 108010048734 sclerotin Proteins 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
This invention discloses preparation and application of regulator for repairing soil polluted by heavy metals. The regulator utilizes hydroxyapatite extracted from animal bone as the main raw material, as well as commercialized Si-Ca-Mg Fertilizer at a ratio of 1:(0.5-1). Besides, solutions containing Fe, Zn, Mn, Mo, B, etc., are also added. The regulator comprises: CaO 40-50 wt.%, SiO2 10-20 wt.%, MgO 3-6 wt.%, P2O5 15-30% wt.%, Al2O3 5-10 wt.%, K2O 0.1-0.5 wt.%, Fe2O3 0.1-1.0% wt.%, ZnO 0.3-0.5 wt.%, MnO 0.1-0.5 wt.%, and impurities. Once applied, the regulator is uniformly mixed with soil according to a ratio of 0.05-1.0 wt. % of dry soil. The regulator has such advantages as abundant raw materials, simple process, low cost, good repairing effect, low addition amount, no secondary pollution, no influence on soil structure, and high nutrition, thus can partly replace chemical fertilizers.
Description
Technical field
The present invention relates to a kind of soil adjusting control agent and preparation and using method that is used for the recovery technique field of soil, a kind of adjusting control agent and preparation and using method that is used to administer heavy-metal contaminated soil of saying so more specifically.
Background technology
Along with developing rapidly of modern industrial or agricultural, a large amount of pollutents enter soil ecosystem by all means, make soil pollution be the trend of increasingly sharpening.China's heavy-metal contaminated soil surpasses 300,000,000 mu at present, accounts for 1/6 of total cultivated area.Harmful heavy metal in the soil runs up to a certain degree will produce soil-plant system and poisons, not only cause land quality to degenerate, influence agricultural product security, and human and animal's health is constituted a serious threat by food chain, but also can worsen hydrological environment by runoff and eluviation polluted surface water and underground water.Therefore, the reparation of heavy-metal contaminated soil and study on regulation have been subjected to great attention in the world.
In order better to solve soil pollution and food-safety problem, improve the sustainable use ability of soil, when strengthening the control of soil pollution source, contaminated soil is repaired of crucial importance.The Basic Ways one of contaminated soil reparation is fixed action (stabilization), by the transport property and the biological effectiveness of various means reduction pollutents, alleviates its harm; The 2nd, removal effect (removal) is removed pollutent from soil, tackle the problem at its root.Around these two approach, scientists has proposed to comprise the various original positions or the dystopy restorative procedure of physics, chemistry, biology, mainly contains soil drip washing, electronic reparation, chemical fixation, reaches phytoremediation etc.The several problems of the essential consideration of soil remediation, one is the cost problem, one is the technical feasibility problem.In addition, environmental safety is also paid much attention to.Soil drip washing and electronic rehabilitation cost are higher, and exist the residual or leaching of eluent to cause the risk of secondary pollution, and majority is limited to the laboratory study level at present; Phytoremediation is because its environmental friendliness and easy and simple to handlely be subjected to extensive attention at present, but the super enriching plant limited amount of having found, and most biomass is low, and poor growth, life cycle are long, are difficult to satisfy the demand.It is easy that relatively economical is repaired in immobilization, easily promotes, and from the eighties in last century application just arranged, but chemical fixation often exists the problem of effect instability or chemical fixatives destruction soil quality.
We can say that various recovery techniques respectively have its characteristics, do not have a special technique to have general applicability so far.Current, economically viable soil remediation technology extremely lacks, and large-area soil pollution control still is difficult to carry out with reparation.Therefore, can select suitable disposal strategy and restorative procedure according to soil pollution type and pollution level with suiting measures to local conditions.For area, with serious pollution farmland, can attempt technology such as drip washing, electronic reparation, perhaps change the soil to utilize mode, do not plant the farm crop of edibility; For in, the slight pollution farmland, then can consider fully to reduce the principle of adjustment and control of its biological effectiveness and dispose by regulating particularly rhizospheric environment of edatope.Available data shows, near some industrial and mining enterprises, waste stacking field, rural-urban fringe farmland pollution is serious, during most of farmland belongs to, slight pollution, therefore, according to the bioavailability principle of adjustment and control of form of poluttants, adopt the method for chemical fixation, reduce the bioavailability of heavy metal, reach the purpose that ensures agricultural product security, seem particularly important for the soil pollution situation of tackling current sternness.After pollutent enters soil, be stored in the soil with different form taxes by various procedures such as interface transmission, absorption-desorption, precipitation-dissolving, oxidation-reduction, cooperation/chelating, solarizations, therefore show different biological effectivenesses, wherein irreversible adsorption, aging, precipitation etc. are to the transport property and the bioavailability of fixing, the equal contaminant reducing of passivating process of pollutent, thereby reduce the migration risk of pollutent and the biology toxicity of alleviating pollutent.The chemical fixation reparation of heavy-metal contaminated soil just is being based on the environmental chemistry behavior of regulation and control heavy metal-polluted soil, changes occurrence patterns, and the principle of reduction bioavailability realizes.The type of adjusting control agent is a lot, mainly comprise pH regulator agent, precipitation agent, sorbent material, oxygenant etc., fixed effect commonly used as lime, zeolite, phosphatic rock, siliceous fertilizer, blast furnace quarrel, clay, polynite, iron and manganese oxides, phosphoric acid salt, sulfide and organic compost or soil ulmin etc., that they are had nothing in common with each other because of different soils type and pollutant kind.Carried out many researchs at aspects such as the screening of soil adjusting control agent, modification, application in the past, obtained some achievements, patent application document open (heavy-metal contaminated soil original position renovation agent, application number CN200510002116, publication number CN1631561 had successively been arranged; Polluted soil improving method, application number CN00410038419, publication number CN1689721).
Have and discover hydroxyapatite (Ca
10(PO
4)
6(OH)
2) have the performance of absorption-fixing metal ions, and (Liu Bin etc., the artificial-synthetic hydroxyapatite is to Pb in the aqueous solution to have the report that is applied to metal ion removal research in the waste water
2+, Cd
2+The ionic fixed action is used chemical industry, 2005 (34) 415-418; Baillez Sandrine et al., Removal of aqueous lead ions by hydroxyapatites:Equilibria andkinetic processes.Journal of Hazardous Materials, 2006, In press).Hydroxyapatite obviously also can be used as a kind of well behaved chemical fixing material and is applied in the heavy metal pollution of soil recovery technique.Yet artificial-synthetic hydroxyapatite's cost is too high, is unsuitable for the improvement of extensive mild or moderate soil pollution.Hydroxyapatite is the major portion of natural bone and tooth, in sclerotin, account for 60%, the content of hydroxyapatite is up to 97% in dentary, therefore extracting natural hydroxyapatite from animal bone can reduce cost greatly, its wide material sources, and manufacture craft is simple, and its large-scale application is administered in soil pollution becomes possibility.Relevant patent (a kind of method of utilizing bone black to administer lead pollution of soil, application number 200510006261.5, publication number CN1810398A) disclosed bone black promptly is a fixed action of having utilized the hydroxyapatite in the bone, but it has fixed effect preferably to soil lead.
Still there are some problems in the immobilization reparation of metal current contaminated soil, for example, because the complicacy of research object and the difference of envrionment conditions make existing technology be difficult to directly apply mechanically; The fixing agent amount of application is bigger than normal, the cost height, and may destroy soil quality; Often only single metal is not effectively given prominence to for the combined pollution treatment effect; Lack the data of field condition test, its stability is short in understanding; Lacking the adjusting control agent use influences the systematic study of aspect to the soil quality and the ecosystem, so has limited and applied.
Summary of the invention
1, the technical problem that will solve
The invention provides a kind of adjusting control agent and preparation and using method that is used to administer heavy-metal contaminated soil, can prepare low cost, efficient, safe soil adjusting control agent, can be applied to the reparation and the regulation and control of heavy-metal contaminated soil by the present invention.
2, technical scheme
A kind of adjusting control agent that is used to administer heavy-metal contaminated soil, its effective constituent is: Ca
10(PO
4)
6(OH)
2, SiO
2, MgO, P
2O
5, Al
2O
3, K
2O is characterized in that elementary compositionly being by weight percentage: CaO40%～50%, SiO
210%～20%, MgO 3%～6%, P
2O
515%～30%, Al
2O
35%～10%, K
2O 0.1%～0.5%, Fe
2O
30.1%～1.0%, ZnO 0.3%～0.5%, MnO 0.1%～0.5%, all the other are impurity.
Above-mentioned adjusting control agent wherein also contains MoO
30.002%～0.1%, B
2O
30.02%～0.1%.
Natural hydroxyapatite and silicon-calcium-magnesium fertilizer mixture that adjusting control agent among the present invention extracts with animal bone processing are essentially consist, are equipped with other element, and its step comprises:
(1) animal bone is cleaned, placed the boiling water boiling 1～2 hour, reject residual tissue, in baking oven with 60～100 ℃ of oven dry, take out precomminution, after 2～3 hours, be ground into 200 order powders (its main component is a hydroxyapatite) with high-temperature calcination more than 800 ℃ again with ball mill;
(2) above-mentioned powder (natural hydroxyapatite) and silicon-calcium-magnesium fertilizer are mixed with weight ratio 1: 0.5～1, make basic adjusting control agent;
(3) add the solution of iron content, zinc, manganese element in basic adjusting control agent, amount of element is controlled to be by the weight percent of adjusting control agent: Fe
2O
30.1%～1.0%, ZnO 0.3%～0.5%, MnO 0.1%～0.5% regulate the back oven dry that stirs and promptly make the finished product adjusting control agent that contains trace element.
The basic adjusting control agent of making in the above-mentioned steps (2) through x-ray fluorescence analysis (XRF), elementary compositionly is: CaO 40%～50%, SiO
210%～20%, MgO 3%～6%, P
2O
515%～30%, Al
2O
35%～10%, K
2O 0.1%～0.5%, all the other impurity 5%～10%.
Also add the solution that contains molybdenum, boron in the step (3), amount of element is controlled to be by the weight percent of adjusting control agent: MoO
30.002%～0.1%, B
2O
30.02%～0.1%.Above-mentioned element is respectively with FeSO
4H
2O, ZnSO
47H
2O, MnSO
47H
2O, [(NH
4)
6Mo
7O
244H
2O], Na
2B
4O
710H
2The preparation of O compound.
To basic adjusting control agent in add wherein one or more micro-solution such as iron content, zinc, molybdenum, manganese, boron at 1: 1 with mass ratio, the trace element amount is controlled to be by the mass percent of adjusting control agent: Fe
2O
30.1%～1.0%, ZnO 0.3%～0.5%, MnO 0.1%～0.5%, MoO
30.002%～0.1%, B
2O
30.02%～0.1%.Respectively with FeSO
4H
2O, ZnSO
47H
2O, MnSO
47H
2O, [(NH
4)
6Mo
7O
244H
2O], Na
2B
4O
710H
2The preparation of compounds such as O is regulated the back oven dry that stirs and is promptly made the finished product adjusting control agent that contains trace element.Through x-ray fluorescence analysis (XRF), elementary compositionly be: CaO40%～50%, SiO
210%～20%, MgO 3%～6%, P
2O
515%～30%, Al
2O
35%～10%, K
2O 0.1%～0.5%, Fe
2O
30.1%～1.0%, ZnO 0.3%～0.5%, MnO 0.1%～0.5%, MoO
30.002%～0.1%, B
2O
30.02%～0.1%, all the other are impurity.The finished product adjusting control agent is a powdery substance, and pH is 9.0～11.0 (solid-to-liquid ratio is 1: 2.5), and the proportioning of trace element can not cause the soil secondary pollution under the consumption usually with reference to the ratio in the trace element compound fertilizer commonly used in the adjusting control agent.
A kind of using method that is used to administer the adjusting control agent of heavy-metal contaminated soil, in being manured into soil by 0.05%～1.0% weight of soil dry weight during use, abundant mixing.
Can add adjusting control agent in the ratio of soil dry weight 0.05%～1.0% as the case may be when using this adjusting control agent.
Adjusting control agent has material impact with fully contacting of soil to improving fixed effect, therefore, and when using at the scene, can dig out contaminated soil earlier, after air-dry (drying), the bulk grogs be beaten carefully, sprinkle adjusting control agent again, fully level land behind the mixing, promptly can be used for normal farming.
3, beneficial effect
The invention discloses a kind of adjusting control agent and preparation and using method that is used to administer heavy-metal contaminated soil, the adjusting control agent for preparing by the present invention has following clear and definite characteristic after test is used:
(1) repairing effect is good.The present invention reduces the active original position adjusting control agent of heavy metal for adding in the soil, contain various ingredients, equates that by adsorbing, precipitate, reach with heavy metal ion formation new mineral multiple mechanism reduces the bioavailability and the transport property of heavy metal.Be administered to after the soil, improve soil pH on the one hand, improve the confinement capabilities of soil particle to heavy metal ion, can reduce risk to underground water and the migration of other surrounding medium, on the other hand, contained hydroxyapatite, activated silica, active phosphorus, calcium oxide, magnesium oxide etc. can make the heavy metal form transform to the invalid attitude that biology can not utilize, contained trace element can produce antagonistic effect with heavy metal ion, reduces the absorption of crop to heavy metal, reaches the purpose that ensures agricultural product security.Adjusting control agent of the present invention all has fixed action to various heavy, and being particularly suitable for current is the contaminated soil reparation of principal character with the combined pollution.
(2) production cost is low.Mainly the have drawn from discarded animal bone of wide material sources of the present invention is aided with other an amount of inorganic materials, and through simply being processed to form new mixture, the cheapness of drawing materials not only can be alleviated and pollute but also realize changing waste into resources, and manufacturing process is easy, and production cost is low.
(3) consumption is few, easily promotes.Adjusting control agent of the present invention can play effect under the less situation of amount of application, rehabilitation cost is reduced, and unlikely Soil structure and the quality of influencing can not produce secondary pollution yet simultaneously, easily is accepted.
(4) of many uses, can bring into play the fertilizer function simultaneously.Contain the essential a large amount of active elements of plant in the adjusting control agent, especially, elements such as silicon, manganese, molybdenum, boron, zinc can improve the resistance of crop, improve crop quality, improve output.
Description of drawings
Fig. 1 uses the influence synoptic diagram of adjusting control agent to the adsorption by soil heavy metal cadmium;
Fig. 2 uses adjusting control agent is resolved heavy metal cadmium to soil the synoptic diagram that influences;
Fig. 3 uses the influence synoptic diagram of adjusting control agent to the soil heavy metal cadmium metamorphosis;
Fig. 4 uses the influence synoptic diagram of adjusting control agent to the plumbous metamorphosis of heavy metal-polluted soil;
Fig. 5 uses the influence synoptic diagram of adjusting control agent to reed wormwood artemisia enriching heavy metal under the field conditions;
Embodiment
Below further specify of the present invention practicing by example
Embodiment 1
Animal bone is cleaned, placed the boiling water boiling 2 hours, reject residual tissue, in baking oven,, take out precomminution, again with 900 ℃ of high-temperature calcinations after 2 hours with 80 ℃ of oven dry, be ground into 200 order powders with ball mill, mixed with silicon-calcium-magnesium fertilizer (" Fei Daling element " board, Earthquake of Anyang station in Henan phenanthrene reach Si-K fertilizer limited liability company and produce) by weight 1: 1, it is standby to make basic adjusting control agent.Add Fe, Zn, Mn, Mo, B element mixing solutions with 1: 1 mass ratio in basic adjusting control agent, amount of element adds the mass percent of back in adjusting control agent by it and is respectively Fe
2O
30.1%, ZnO O.3%, MnO 0.1% controls, with FeSO
4H
2O, ZnSO
47H
2O, MnSO
47H
2The preparation of O compound, concentration of element is Fe in the solution
2+704ppm, Zn
2+2419ppm, Mn
2+778ppm.After stirring, promptly make adjusting control agent in 60 ℃ of following oven dry, its pH value is 9.3 (solid-to-liquid ratio is 1: 2.5).Through X-ray fluorescence spectra analysis (XRF), the finished product adjusting control agent is elementary composition to be: CaO 44.6%, SiO
216.4%, MgO 5.2%, P
2O
519.4%, Al
2O
38.4%, K
2O 0.3%, Fe
2O
30.12%, ZnO 0.31%, MnO 0.12%, all the other are impurity.
Can add adjusting control agent in the ratio of soil dry weight 0.05%～1.0% as the case may be when using this adjusting control agent.When using at the scene, can dig out contaminated soil earlier, after air-dry (drying), the bulk grogs be beaten carefully, sprinkle adjusting control agent again, fully level land behind the mixing, promptly can be used for normal farming.
Embodiment 2
Animal bone is cleaned, placed the boiling water boiling 2 hours, reject residual tissue, in baking oven,, take out precomminution, again with high-temperature calcination more than 900 ℃ after 2 hours with 80 ℃ of oven dry, be ground into 200 order powders with ball mill, mixed with silicon-calcium-magnesium fertilizer (" Fei Daling element " board, Earthquake of Anyang station in Henan phenanthrene reach Si-K fertilizer limited liability company and produce) by weight 2: 1, it is standby to make basic adjusting control agent.Add Fe, Zn, Mn, Mo, B element mixing solutions with 1: 1 mass ratio in basic adjusting control agent, amount of element adds the mass percent of back in adjusting control agent by it and is respectively Fe
2O
31.0%, ZnO 0.5%, MnO 0.5%, MoO
30.1%, B
2O
30.1% controls, with FeSO
4H
2O, ZnSO
47H
2O, [(NH
4)
6Mo
7O
244H
2O], MnSO
47H
2O, Na
2B
4O
710H
2The preparation of compounds such as O, microelement concentration is Fe in the solution
2+7157ppm, Zn
2+4100ppm, Mn
2+3960ppm, Mo
7O
24 6-1072ppm, B
4O
7 2-1141ppm.After stirring, promptly make adjusting control agent in 60 ℃ of following oven dry, its pH value is 11.0 (solid-to-liquid ratio is 1: 2.5).Through X-ray fluorescence spectra analysis (XRF), the finished product adjusting control agent is elementary composition to be: CaO 48.2%, SiO
211.1%, MgO 3.9%, P
2O
525.9%, Al
2O
35.7%, K
2O 0.2%, Fe
2O
31.03%, ZnO 0.52%, MnO 0.51%, MoO
30.12%, B
2O
30.11%, all the other are impurity.Its use is with embodiment 1.
Animal bone is cleaned, placed the boiling water boiling 2 hours, reject residual tissue, in baking oven,, take out precomminution, again with high-temperature calcination more than 900 ℃ after 2 hours with 80 ℃ of oven dry, be ground into 200 order powders with ball mill, mixed with silicon-calcium-magnesium fertilizer (" Fei Daling element " board, Earthquake of Anyang station in Henan phenanthrene reach Si-K fertilizer limited liability company and produce) by weight 1.5: 1, it is standby to make basic adjusting control agent.Add Fe, Zn, Mn, Mo, B element mixing solutions with 1: 1 mass ratio in basic adjusting control agent, amount of element adds the mass percent of back in adjusting control agent by it and is respectively Fe
2O
30.5%, ZnO 0.4%, MnO 0.2%, MoO
30.05%, B
2O
30.05% controls, with FeSO
4H
2O, ZnSO
47H
2O, [(NH
4)
6Mo
7O
244H
2O], MnSO
47H
2O, Na
2B
4O
710H
2The preparation of compounds such as O, microelement concentration is Fe in the solution
2+3543ppm, Zn
2+3249ppm, Mn
2+1568ppm, Mo
7O
24 6-530ppm, B
4O
7 2-564ppm.After stirring, promptly make adjusting control agent in 60 ℃ of following oven dry, its pH value is 10.2 (solid-to-liquid ratio is 1: 2.5).Through X-ray fluorescence spectra analysis (XRF), the finished product adjusting control agent is elementary composition to be: CaO 46.8%, SiO
213.2%, MgO 4.4%, P
2O
523.3%, Al
2O
36.7%, K
2O 0.3%, Fe
2O
30.53%, ZnO0.41%, MnO 0.21%, MoO
30.05%, B
2O
30.05%, all the other are impurity.Its use is with embodiment 1.
Animal bone is cleaned, placed the boiling water boiling 2 hours, reject residual tissue, in baking oven,, take out precomminution, again with 900 ℃ of high-temperature calcinations after 2 hours with 80 ℃ of oven dry, be ground into 200 order powders with ball mill, mixed with silicon-calcium-magnesium fertilizer (" Fei Daling element " board, Earthquake of Anyang station in Henan phenanthrene reach Si-K fertilizer limited liability company and produce) by weight 1: 1, it is standby to make basic adjusting control agent.Add Fe, Zn, Mn, Mo, B element mixing solutions with 1: 1 mass ratio in basic adjusting control agent, amount of element adds the mass percent of back in adjusting control agent by it and is respectively Fe
2O
30.1%, ZnO 0.3%, MnO 0.1%, MoO
30.002%, B
2O
30.02% controls, with FeSO
4H
2O, ZnSO
47H
2O, MnSO
47H
2O, [(NH
4)
6Mo
7O
244H
2O], Na
2B
4O
710H
2The preparation of compounds such as O, concentration of element is Fe in the solution
2+704ppm, Zn
2+2419ppm, Mn
2+778ppm, Mo
7O
24 6-21ppm, B
4O
7 2-223ppm.After stirring, promptly make adjusting control agent in 60 ℃ of following oven dry, its pH value is 9.3 (solid-to-liquid ratio is 1: 2.5).Through X-ray fluorescence spectra analysis (XRF), the finished product adjusting control agent is elementary composition to be: CaO 44.6%, SiO
216.4%, MgO5.2%, P
2O
519.4%, Al
2O
38.4%, K
2O 0.3%, Fe
2O
30.12%, ZnO 0.31%, MnO 0.12%, MoO
30.002%, B
2O
30.02%, all the other are impurity.
Embodiment 5
Adjusting control agent is to the influence of adsorption by soil-parsing cadmium
(1) adsorption experiment: get an amount of soil sample, (ratio of adding adjusting control agent is: 0,0.1%, 0.25%, 5%, 1.0%, 2.0%), both are mixed, be divided in the plastic cup of 9 * 10cm to add adjusting control agent in the embodiment of the invention 1; In 25 ± 1 ℃ of temperature, 60% time constant temperature culture of soil moisture 2 months, make that the reaction of adjusting control agent and soil is basicly stable.Then, get an amount of soil and carry out lyophilize, and levigate mistake 80 mesh sieves are standby.With 0.01mol/LNaNO
3Be background solution, the Cd metallic solution (concentration series is: 1.0mg/L, 5.0mg/L, 10.0mg/L, 20.0mg/L, 40.0mg/L, 80.0mg/L, 160.0mg/L, 480.0mg/L) of configuration series concentration.Adopt the once balance method, accurately take by weighing above-mentioned soil sample 1.000g and place 50mL polyvinyl chloride centrifugation pipe, press Tu Shui than 1: 20 (g/mL), add above-mentioned serial Cd solution respectively, after 24 hours,, measure the supernatant liquor metal concentration 25 ℃ of following constant temperature vibrations with the centrifugal 10min of 6000r/min, according to adding liquid and balance liquid concentration difference, calculate adsorption by soil Cd amount respectively by following formula.
(2) desorption experiment: after above-mentioned residual soil sample spends deionised water three times, press Tu Shui and added 0.01mol/LNaNO than 1: 20
3Solution is strippant, and 25 ℃ of following vibrations are after 24 hours, with the centrifugal 10min of 6000r/min.Measure the supernatant liquor metal concentration, calculate desorption quantity and resolution factor.
From Fig. 1 and Fig. 2 as can be known, adjusting control agent of the present invention can improve the absorption of soil to Cd greatly, and along with the adjusting control agent consumption increases, adsorptive capacity also increases, and makes simultaneously that adsorbed Cd's be difficult to resolve suction more.Illustrate that this adjusting control agent can improve the RETENTION BY SOILS of soil particle to pollutent, reduced the risk of heavy metal contaminants to other surrounding medium migrations such as underground water.
Embodiment 6
Adjusting control agent is to the influence of soil lead, cadmium form
The somewhere agricultural soil, its pH5.3, because acidity is bigger, the heavy metal-polluted soil activity is higher, bioavailability is higher.Get an amount of this soil, air-dry after, the levigate 3mm sieve of crossing, standby, respectively by soil sample heavy 0.05%, 0.1%, 0.5% add the adjusting control agent mixing that obtains in the embodiment of the invention 1, keep ground moistening, cultivate the form of sampling analysis soil lead cadmium after 15 days.The continuous extraction and analytical method (BCR) that morphological analysis adopts European Union to recommend, B1 represents exchangeable species and carbonate combined sum, B2 hydrated iron Mn oxide combined, B3 is organism and sulfide combined, B4 is a residual form, gets over form backward, and bioavailability is low more.Adjusting control agent to the regulating effect of metal form as shown in Figure 3 and Figure 4.Use in the soil of adjusting control agent, the form of two kinds of metals all from the higher form of activity to the low form transformation of residual form isoreactivity.At amount of application is 0.5% o'clock, and plumbous residual form accounts for total amount per-cent and brought up to 81% from 15%; The residual form proportion of cadmium has improved 1 times, and first attitude is reduced to 2% from 35%.As seen the present invention uses the form transformation that adjusting control agent of the present invention can obviously promote heavy metal-polluted soil, reduces the bioavailability of heavy metal-polluted soil.
Embodiment 6
Wheat is absorbed the influence of heavy metal
At first, preparation simulation heavy-metal contaminated soil, external source heavy metal interpolation level is respectively: Cu-1500mg/kg, Zn-1500mg/kg, Pb-1500mg/kg, Cd-10mg/kg.In soil, add mass ratio respectively and be 0,0.1%, 0.5%, 1.0% adjusting control agent, and mixing, be loaded in the little plastic tub, every basin is adorned native 1kg, makes about 60% of Soil conservation field capacity, 1 week of ageing back plantation wheat, each is handled and repeats 3 times, after at room temperature growing 15 days, sampling analysis wheat root, stem, univalent metal content (clearing up aas determination with nitric acid-perchloric acid method).It is as shown in table 1 that each handles the wheat heavy metal content.At addition is 0.1%, and unusual effect is just arranged, and along with the increase of addition, the wheat heavy metal content significantly descends.When addition is 1.0% (10g/kg soil), in wheat root, stem, the leaf content of Cu reduce 67.4% respectively, 60.4%43.1%; Zn minimizing 42.9%, 56.7%38.8%; Pb reduces 78.8%, 68.6%, 73.3%; Cd reduces 70.4%, 71.4%, 63.7% respectively.As seen, this adjusting control agent absorbs 4 heavy metal species for the inhibition crop all unusual effect.
Table 1 adds adjusting control agent absorbs heavy metal to wheat seedling influence
| Adjusting control agent adds ratio | Cu(mg/kg) | Zn(mg/kg) | ||||
| Root | Stem | Leaf | | Stem | Leaf | |
| 0 0.1％ 0.5％ 1.0％ | 2313.8±115.1a 1876.3±131.3b 1315.6±78.9c 753.7±52.8d | 257.1±35.7a 210.2±27.4a 141.3±7.1b 101.7±7.1c | 154.3±12.3a 135.6±9.3a 92.4±6.4b 87.8±6.2b | 3743.5±374.4a 3309.7±264.8ab 3141.3±282.7b 2137.8±149.6c | 748.7±72.6a 704.6±84.6a 412.3±28.9b 324.4±22.7b | 512.5±46.1a 451.6±13.5b 351.2±21.1c 313.4±17.7c |
| Adjusting control agent adds ratio | Pb(mg/kg) | Cd(mg/kg) | ||||
| Root | Stem | Leaf | | Stem | Leaf | |
| 0 0.1％ 0.5％ 1.0％ | 741.4±24.9a 649.7±58.5b 353.3±24.7c 157.3±9.4d | 137.4±9.6a 102.3±12.3b 67.3±5.4c 43.1±1.7d | 95.8±11.5a 79.2±4.9b 45.3±3.5c 25.6±2.1d | 170.1±6.8a 130.3±6.9b 83.6±6.5c 50.4±2.4d | 21.3±0.4a 15.3±1.4b 9.6±0.7c 6.1±0.5d | 12.4±0.7a 9.7±0.6b 6.3±0.7c 4.5±0.1d |
Annotate: letter different expressions in data back reach the conspicuous level of P＜0.05
Embodiment 7
Field condition regulation and control test
In order further to investigate the action effect of adjusting control agent under the field conditions, carried out open-air regulation and control test in experimental plot, Nanjing University Eight Diagrams continent, trial crops is the reed wormwood artemisia.Test plot soil pH is about 5.0, total Cu51mg/kg, total Zn271mg/kg, Pb40mg/kg, Cd0.35mg/kg, heavy metal content in soil are in the agricultural soil standard range, but because soil acidity is bigger, it is higher that the biology of heavy metal (particularly Cd) can utilize attitude to account for the total amount ratio, adds that the accumulation ability of reed wormwood artemisia is stronger, therefore has certain risk.Test is when carrying out, at first will test the plot smooth after, with separator lined become different fritter (3m * 3m) is provided with addition respectively and is 0 (being control group), 0.05%, 0.1%, 0.5% processing, each processing establish 3 parallel.In order to get rid of the phase mutual interference between processing, not on the same group between an excessive band at interval.During test, earlier topsoil gong is routed up air-dry, smash the macrobead soil block after, evenly spill adjusting control agent, thorough mixing evenly after, plant the reed wormwood artemisia in September, 2005.Herborization in March, 2006 sample is analyzed the different sites metal content.Fig. 5 has shown the effect that suppresses reed wormwood artemisia absorption heavy metal after adjusting control agent is used, and as seen from the figure, uses this adjusting control agent and can reduce the absorption of crop to heavy metal, and just play positive effect when amount of application is 0.05% (0.5g/kg).Because in the test soil, with respect to other metal, the bioavailability of Cd is higher, so the regulating effect to Cd is also best in this test, when amount of application was 0.5% (5g/kg), reed wormwood artemisia root, stem, leaf Cd content had reduced 66%, 55%, 57% respectively.Using this adjusting control agent soil pH is improved to some extent, is 0.5% o'clock at amount of application, and soil pH has brought up to 6.95 from 5.0, has not only reduced the bioavailability of heavy metal, and has been more conducive to plant growth.In addition, because amount of application is few, can produce and destroy edatope.On the other hand, contained nutrient of adjusting control agent and trace element can provide nutrition for the reed wormwood artemisia, improve quality, can partly substitute conventional fertilizer.This example ties up under the field conditions to be carried out, and test-results is satisfactory, has further verified suitability of the present invention.
Claims (7)
1. adjusting control agent that is used to administer heavy-metal contaminated soil, its effective constituent is: Ca
10(PO
4)
6(OH)
2, SiO
2, MgO, P
2O
5, Al
2O
3, K
2O is characterized in that elementary compositionly being by weight percentage: CaO 40%～50%, SiO
210%～20%, MgO 3%～6%, P
2O
515%～30%, Al
2O
35%～10%, K
2O 0.1%～0.5%, Fe
2O
30.1%～1.0%, ZnO 0.3%～0.5%, MnO0.1%～0.5%, all the other are impurity.
2. a kind of adjusting control agent that is used to administer heavy-metal contaminated soil according to claim 1 is characterized in that wherein also containing MoO
30.002%～0.1%, B
2O
30.02%～0.1%.
3. preparation method who is used to administer the adjusting control agent of heavy-metal contaminated soil, its step comprises:
(1) animal bone is cleaned, placed the boiling water boiling 1～2 hour, reject residual tissue, in baking oven,, take out precomminution, after 2～3 hours, be ground into 200 order powders with high-temperature calcination more than 800 ℃ again with ball mill with 60～100 ℃ of oven dry;
(2) above-mentioned powder that obtains and silicon-calcium-magnesium fertilizer are mixed with weight ratio 1: 0.5～1, make basic adjusting control agent;
(3) add the solution of iron content, zinc, manganese element in basic adjusting control agent, amount of element is controlled to be by the weight percent of adjusting control agent: Fe
2O
30.1%～1.0%, ZnO 0.3%～0.5%, MnO 0.1%～0.5% regulate the back oven dry that stirs and promptly make the finished product adjusting control agent that contains trace element.
4. a kind of preparation method who is used to administer the adjusting control agent of heavy-metal contaminated soil according to claim 3 is characterized in that also adding the solution that contains molybdenum, boron in step (3), and amount of element is controlled to be by the weight percent of adjusting control agent: MoO
30.002%～0.1%, B
2O
30.02%～0.1%.
5. a kind of preparation method who is used to administer the adjusting control agent of heavy-metal contaminated soil according to claim 4, the solution that it is characterized in that iron content, zinc, manganese, molybdenum, boron in the step (3) respectively is respectively with FeSO
4H
2O, ZnSO
47H
2O, MnSO
47H
2O, [(NH
4)
6Mo
7O
244H
2O], Na
2B
4O
710H
2The preparation of O compound.
6. using method that is used to administer the adjusting control agent of heavy-metal contaminated soil, when it is characterized in that using, in being manured into soil by 0.05%～1.0% weight of soil dry weight, abundant mixing.
7. a kind of using method that is used to administer the adjusting control agent of heavy-metal contaminated soil according to claim 6 when it is characterized in that using at the scene, can be dug out contaminated soil earlier, after air-dry, the bulk grogs is beaten carefully, sprinkled adjusting control agent again, fully level land behind the mixing, promptly can be used for normal farming.
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