CN105130693A - Composite fertilizer for repairing lead-polluted soil, preparation method and application thereof - Google Patents
Composite fertilizer for repairing lead-polluted soil, preparation method and application thereof Download PDFInfo
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Abstract
The invention provides a composite fertilizer for repairing lead-polluted soil, which includes nitrogen, phosphorus and potassium nutrients and the following components, in proper ratio: agricultural rare earth nitrates, waste catalyst, chitosan, humic acid mineral powder, sepiolite, plant ash, kaolin and zeolite. When the fertilizer is applied in lead-polluted soil, lead in soil is effectively passivated and immobilized under a synergistic effect of the components above, and meanwhile, the polluted soil is effectively repaired, so that activity of lead in soil is significantly reduced and adsorption of crops to lead is effectively reduced, thereby reducing lead content in crops significantly. The composite fertilizer is excellent in stability and environment-friendly property, is free of secondary pollution, is low in cost and is easy to popularize in large scale. When the fertilizer is applied in lead-polluted soil, the use quantity is only 10-200 kg/hm<2>. The composite fertilizer can significantly reduce the lead content in crops, so that the lead content in crops reaches national food safety standard.
Description
Technical field
The present invention relates to composite fertilizer of a kind of remediating lead-contaminated soil and its preparation method and application, belong to the technical field of contaminated soil remediation.
Background technology
Along with the fast development of industry and the continuous increase of countryside tax system intensity, the pollutents such as plurality of heavy metal enter edatope, thus have caused the heavy metal contamination of soil, and become one by the global problem of extensive concern.It is reported, nearly 2,000 ten thousand hm of cultivated area that current China pollutes by lead, mercury, arsenic, chromium, cadmium etc.
3, account for 20% of national total cultivated area, had a strong impact on modern agricultural development and social stablizing.
The pollution of heavy metal in soil, directly causes exceeding standard of agricultural-food heavy metal content, and then constitutes a serious threat to human health after entering human body by food chain.According to existing published documents and materials report, the exceeding standard rate of Changsha vegetables heavy metal is 50%; The suburbs, Shenyang Chinese cabbage exceeding standard rate that is plumbous and cadmium is respectively 100% and 58%, and cucumber cadmium, mercury, lead doping rate are respectively 73%, 27% and 18%; The exceeding standard rate of Baoshan District of Shanghai vegetables lead and cadmium is respectively up to 82% and 54%; The content of Wenzhou City's vegetables lead exceedes national standard 1.7 times, and fruit is 1.6 times; 9 kinds, Chengdu vegetables exceeding standard rate that is plumbous and cadmium is respectively 22% and 29%; Chongqing City's paddy rice cadmium, lead doping rate are 25-50%, and corn lead content exceeding standard rate is the exceeding standard rate of 22-66%, cadmium and mercury is 11%; Bulk vegetable cadmium, the lead doping rate of the domestic Xiangjiang River basin in Hunan have all exceeded 10%, and the exceeding standard rate of Tidal Flat Reclamation agriculture district, Pearl River Delta rice nickel, lead, chromium, cadmium reaches 48.3%, 28.9%, 12.3% and 2.6% respectively.According to another the measurement result of the units such as tealeaves institute of the Chinese Academy of Agricultural Sciences and the Ministry of Agriculture, the tealeaves lead doping rate in main Chan Cha district is increase trend in recent years.Within 1999, Tea Samples lead doping rate is 12.5%, and calendar year 2001 then rises to 25%.Therefore, the Pollution abatement of heavy metal-polluted soil is extremely urgent.
Chinese patent literature CN104119925A discloses a kind of soil-repairing agent, and the effective constituent of this renovation agent comprises the lentinan of 5-100 weight part and the chitosan of 1-25 weight part.Its preparation method is as follows: the preparation of (1) lentinan: get mushroom fruiting body and pulverize, cross 30 mesh sieves, get the powder 200kg that can sieve, and add 1000L water and soak 1 hour in 80 DEG C, period stirs, and then filters and retains clear liquid; The residue once soaked adds 1000L water and soaks 1 hour in 80 DEG C, and period stirs, and then filters and retains clear liquid; The residue that secondary soaks adds 1000L water and soaks 1 hour in 80 DEG C, and period stirs, and then filters and retains clear liquid; Merge above-mentioned clear liquid, by the Hollow Fiber Ultrafiltration system ultrafiltration that molecular weight cut-off is 30kDa, the part obtaining retaining is concentrated into 1/10th volumes through dual-effect concentrator, is then dried to water content through vacuum drier and is not more than 10% (w/w), obtain lentinan; (2) preparation of soil-repairing agent: get above-mentioned lentinan 25kg and chitosan 6.5kg, add potassium carbonate powder 5kg, after mixing, adds peat 63.5g, mixes, obtain soil-repairing agent.But after above-mentioned soil-repairing agent is applied to lead pollution of soil, repairing effect is unsatisfactory, and in farm crop, lead content is still higher, and need disposablely to use in a large number, be generally 2250-4500kg/hm
2, transportation cost and to use cost all higher, peasant not easily accepts, and is difficult to spread.
Summary of the invention
After technical problem to be solved by this invention is that soil improvement agent of the prior art is applied to lead pollution of soil, repairing effect is unsatisfactory, in farm crop, lead content is still higher, thus proposes a kind of effective and effectively can reduce the composite fertilizer of the remediating lead-contaminated soil of lead content in farm crop to soil remediation.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A composite fertilizer for remediating lead-contaminated soil, its raw material composition comprises:
Nitrogenous fertilizer, 10-60 weight part;
Phosphate fertilizer, 10-60 weight part;
Potash fertilizer, 10-60 weight part;
Arsenic determination, 0.5-2 weight part;
Catalyzer gives up agent, 2-10 weight part;
Chitosan, 10-40 weight part;
Humic acid breeze, 25-55 weight part;
Sepiolite, 15-25 weight part;
Plant ash, 3-11 weight part;
Kaolin, 0.5-1.1 weight part;
Zeolite, 0.3-1.2 weight part.
The give up active ingredient of agent of described catalyzer is cupric oxide and zinc oxide.
The agent of giving up of described catalyzer is be that the catalst for synthesis of methanol of carrier gives up agent with aluminum oxide.
The give up particle diameter of agent of described catalyzer is less than or equal to 10nm.
Described nitrogenous fertilizer is the mixture of one or more in urea, volatile salt, ammonium sulfate, ammonium chloride, nitrocalcite and ammonium nitrate, described phosphate fertilizer is the mixture of one or more in monoammonium phosphate, diammonium phosphate, calcium superphosphate, double superhosphate and fused(calcium magnesium)phosphate, and described potash fertilizer is the mixture of one or more in Repone K, potassium sulfate, potassium silicate and saltpetre.
The particle diameter of described chitosan is 110-140 order, the particle diameter of described humic acid breeze is 110-140 order, and the particle diameter of described sepiolite is 110-140 order, and the particle diameter of described plant ash is 110-140 order, described kaolinic particle diameter is 110-140 order, and the particle diameter of described zeolite is 110-140 order.
Also be added with at least one in unslaked lime, wilkinite, hydroxyapatite and fertilizer;
In described fertilizer, to dry quality of organic matter mark >=40% of base; To dry massfraction >=4.0% of the nitrogen of base, Vanadium Pentoxide in FLAKES and potassium oxide total nutrient; Massfraction≤30% of the moisture of fresh sample, potential of hydrogen pH value is 5.5-8.5.
The preparation method of the composite fertilizer of described remediating lead-contaminated soil, its step is as follows:
Get various feed composition according to above-mentioned weight part and mix, namely obtaining described composite fertilizer through extruder grain.
The application of composite fertilizer in heavy-metal contaminated soil is repaired of described remediating lead-contaminated soil.
The application process of the composite fertilizer of described remediating lead-contaminated soil, its step is as follows:
In the soil of heavy metal contamination, add the composite fertilizer of described remediating lead-contaminated soil, addition is 10-200kg/hm
2, the balance improvement soil time is 7-14 days.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) composite fertilizer of remediating lead-contaminated soil of the present invention, comprise the arsenic determination of n p k nutrition component and applicable proportioning, catalyzer gives up agent, chitosan, humic acid breeze, sepiolite, plant ash, kaolin and zeolite component, after being applied to heavy-metal contaminated soil, under the synergy of above-mentioned each component, realize heavy metal in soil being carried out effective passivation and effectively repairing polluted soil while fixing, thus make the active significantly reduction of the lead in soil on the one hand, be conducive to reducing farm crop to the absorption of lead, and then lead content in farm crop is significantly reduced, the n p k nutrition component contained on the other hand and plant ash etc. can provide nutrition to improve soil fertility for soil again, strengthen disease-resistant crops ability, and continue the repairing effect of strengthening to polluted soil, in addition, rare earth component in arsenic determination itself has antagonistic action to lead, be conducive to further reducing farm crop to the absorption of lead, composite fertilizer of the present invention has good stability and environment friendly, secondary pollution can not be produced, with low cost, be easy to spread, when being applied to lead pollution of soil, amount of application is only 10-200kg/hm
2, just can significantly reduce lead content in farm crop, make it reach national edible safety standard, reach management goal.
(2) composite fertilizer of remediating lead-contaminated soil of the present invention, also be added with unslaked lime, wilkinite, hydroxyapatite and fertilizer, by the lead in the inorganic component fixed-contamination soil in unslaked lime, wilkinite, hydroxyapatite, and improve the fertility of soil in conjunction with fertilizer, thus the repair of strengthening to polluted soil while improving Lead In Soil fixed action.
Embodiment
1g is represented with 1 weight part in following examples.
Embodiment 1
The present embodiment provides a kind of composite fertilizer of remediating lead-contaminated soil, and its raw material composition comprises:
Urea, 10 weight parts;
Monoammonium phosphate, 60 weight parts;
Repone K, 10 weight parts;
Arsenic determination, 2 weight parts;
Catalst for synthesis of methanol gives up agent, 2 weight parts;
Chitosan, 10 weight parts;
Humic acid breeze, 55 weight parts;
Sepiolite, 15 weight parts;
Plant ash, 11 weight parts;
Kaolin, 0.5 weight part;
Zeolite, 1.2 weight parts.
The particle diameter of described arsenic determination is 10 orders, and the give up particle diameter of agent of described catalst for synthesis of methanol is 10nm; The particle diameter of described chitosan, humic acid breeze, sepiolite, plant ash, kaolin and zeolite is 110 orders.
Further, the preparation method of the composite fertilizer of described remediating lead-contaminated soil is provided, is specially:
Get various feed composition according to above-mentioned weight part and mix, namely obtaining described composite fertilizer through extruder grain.
Embodiment 2
The present embodiment provides a kind of composite fertilizer of remediating lead-contaminated soil, and its raw material composition comprises:
Volatile salt, 60 weight parts;
Diammonium phosphate, 10 weight parts;
Potassium sulfate, 60 weight parts;
Arsenic determination, 0.5 weight part;
Catalst for synthesis of methanol gives up agent, 10 weight parts;
Chitosan, 15 weight parts;
Humic acid breeze, 25 weight parts;
Sepiolite, 25 weight parts;
Plant ash, 3 weight parts;
Kaolin, 1.1 weight parts;
Zeolite, 0.3 weight part;
Unslaked lime, 10 weight parts;
Wilkinite, 15 weight parts;
Hydroxyapatite, 10 weight parts;
Fertilizer, 20 weight parts.
The particle diameter of described arsenic determination is 10 orders, and the give up particle diameter of agent of described catalst for synthesis of methanol is 9nm; The particle diameter of described chitosan, humic acid breeze, sepiolite, plant ash, kaolin and zeolite is 140 orders.
The particle diameter of described unslaked lime, wilkinite, hydroxyapatite is 10 orders.
In described fertilizer, to dry the quality of organic matter mark of base for 40%; To dry the massfraction of the nitrogen of base, Vanadium Pentoxide in FLAKES and potassium oxide total nutrient for 4.0%; The massfraction of the moisture of fresh sample is 30%, and potential of hydrogen pH value is 5.5.
Further, the preparation method of the composite fertilizer of described remediating lead-contaminated soil is provided, is specially:
Get various feed composition according to above-mentioned weight part and mix, namely obtaining described composite fertilizer through extruder grain.
Embodiment 3
The present embodiment provides a kind of composite fertilizer of remediating lead-contaminated soil, and its raw material composition comprises:
Ammonium sulfate, 40 weight parts;
Calcium superphosphate, 35 weight parts;
Potassium silicate, 50 weight parts;
Arsenic determination, 1.5 weight parts;
Catalst for synthesis of methanol gives up agent, 5 weight parts;
Chitosan, 30 weight parts;
Humic acid breeze, 40 weight parts;
Sepiolite, 17 weight parts;
Plant ash, 8 weight parts;
Kaolin, 0.9 weight part;
Zeolite, 0.8 weight part;
Wilkinite, 10 weight parts;
Fertilizer, 20 weight parts.
The particle diameter of described arsenic determination is 10 orders, and the give up particle diameter of agent of described catalst for synthesis of methanol is 8nm; Described chitosan, humic acid breeze, sepiolite, plant ash, kaolin, zeolite and bentonitic particle diameter are 140 orders.
In described fertilizer, to dry the quality of organic matter mark of base for 55%; To dry the massfraction of the nitrogen of base, Vanadium Pentoxide in FLAKES and potassium oxide total nutrient for 8.0%; The massfraction of the moisture of fresh sample is 18%, and potential of hydrogen pH value is 7.5.
Further, the preparation method of the composite fertilizer of described remediating lead-contaminated soil is provided, is specially:
Get various feed composition according to above-mentioned weight part and mix, namely obtaining described composite fertilizer through extruder grain.
Embodiment 4
The present embodiment provides a kind of composite fertilizer of remediating lead-contaminated soil, and its raw material composition comprises:
The mixture that ammonium chloride, nitrocalcite and ammonium nitrate form according to mass ratio 1: 1: 1,45 weight parts;
The mixture that double superhosphate and fused(calcium magnesium)phosphate form according to mass ratio 1: 1,45 weight parts;
The mixture that potassium silicate and saltpetre form according to mass ratio 1: 1,45 weight parts;
Arsenic determination, 1.2 weight parts;
Catalyzer gives up agent, 6 weight parts;
Chitosan, 40 weight parts;
Humic acid breeze, 38 weight parts;
Sepiolite, 21 weight parts;
Plant ash, 10 weight parts;
Kaolin, 0.8 weight part;
Zeolite, 0.9 weight part;
Hydroxyapatite, 20 weight parts;
Fertilizer, 20 weight parts.
The particle diameter of described arsenic determination is 10 orders, and the give up particle diameter of agent of described catalyzer is 8nm; Described chitosan, humic acid breeze, sepiolite, plant ash, kaolin, zeolite and bentonitic particle diameter are 140 orders.
Described catalyzer give up agent be take aluminum oxide as carrier, agent of giving up with cupric oxide and the zinc oxide catalyzer that is active ingredient.
In described fertilizer, to dry the quality of organic matter mark of base for 45%; To dry the massfraction of the nitrogen of base, Vanadium Pentoxide in FLAKES and potassium oxide total nutrient for 5.0%; The massfraction of the moisture of fresh sample is 20%, and potential of hydrogen pH value is 7.
Further, the preparation method of the composite fertilizer of described remediating lead-contaminated soil is provided, is specially:
Get various feed composition according to above-mentioned weight part and mix, namely obtaining described composite fertilizer through extruder grain.
Comparative example 1
This comparative example provides a kind of soil-repairing agent of Lead contamination, and its raw material forms the peat of lentinan, the chitosan of 6.5 weight parts, the salt of wormwood of 5 weight parts and 63.5 weight parts comprising 25 weight parts, and its preparation method is as follows:
(1) preparation of lentinan
Get mushroom fruiting body to pulverize, cross 30 mesh sieves, get the powder 200kg that can sieve, add 1000L water and soak 1 hour in 80 DEG C, period stirs, and then filters and retains clear liquid; The residue once soaked adds 1000L water and soaks 1 hour in 80 DEG C, and period stirs, and then filters and retains clear liquid; The residue that secondary soaks adds 1000L water and soaks 1 hour in 80 DEG C, and period stirs, and then filters and retains clear liquid; Merge above-mentioned clear liquid, by the Hollow Fiber Ultrafiltration system ultrafiltration that molecular weight cut-off is 30kDa, the part obtaining retaining is concentrated into 1/10th volumes through dual-effect concentrator, is then dried to water content through vacuum drier and is not more than 10% (w/w), obtain lentinan;
(2) preparation of soil-repairing agent
Get above-mentioned lentinan 25kg and chitosan 6.5kg, add potassium carbonate powder 5kg, after mixing, add peat 63.5g, mix, namely obtain soil-repairing agent through extruder grain.
The extruder grain technique that above-described embodiment and comparative example adopt can adopt extruder grain production technique general in prior art, and special compound fertilizer process flow process also can be adopted to carry out producing (see " agricultural modernization research " the 18th volume the 2nd phase the 108th page).
Experimental example
The composite fertilizer of the remediating lead-contaminated soil described in embodiment 1-4 and comparative example 1 and renovation agent are numbered as A-D, E successively, select heavy metal Pb contaminated soil as subject, composite fertilizer or the renovation agent of described remediating lead-contaminated soil is added in above-mentioned Pb contaminated soil, and lead content effective in soil after reparation is measured, concrete grammar is: claim 5.0g to cross the pedotheque of 100 mesh sieves in 100ml centrifuge tube, add the NH that 25ml concentration is 3mol/L
4cl solution, centrifugation after vibration 2h, filters and obtains extracting solution, adopts the soluble state metal content in aas determination extracting solution, is effective lead content.
What table 1 showed is the measurement result adopting sample A-E to carry out repairing rear effectively lead content to the soil being initially 17.23mg/kg containing Pb amount, and wherein, the addition of composite fertilizer is 10kg/hm
2, balance improvement soil 7 days;
Table 2 show for adopting sample A to being initially followed successively by 17.23 containing effective Pb amount, 17.56,18.05,16.53, the measurement result of the soil of 17.86mg/kg effective lead content after carrying out repairing;
The measurement result for adopting sample A soil (the initial Pb of containing amount is 17.23mg/kg) to be carried out to effective lead content after repairing under Different adding amount that table 3 shows;
What table 4 showed is adopt sample A at same addition 10kg/hm
2under, soil (initial be 17.23mg/kg containing Pb amount) is not carried out under homostasis improvement time to the measurement result of effectively lead content after repairing.
Table 1-initially containing Pb amount for the soil of 17.23mg/kg carry out repairing after the measurement result of effective lead content
Table 2-sample A is to the measurement result of lead content effective after Pb contaminated soil remediation
| Initial effectively Pb content/(mg/kg) | 17.23 | 17.56 | 18.05 | 16.53 | 17.86 |
| Addition/(the kg/hm of composite fertilizer 2) | 10 | 10 | 10 | 10 | 10 |
| Balance improvement soil time/(my god) | 15 | 15 | 15 | 15 | 15 |
| Effective Pb content/(mg/kg) after repairing | 2.43 | 2.94 | 3.32 | 2.43 | 2.84 |
| Effective Pb reduced rate in soil | 85.89％ | 83.26％ | 81.61％ | 85.30％ | 84.10％ |
Table 3-sample A under Different adding amount to soil remediation after the measurement result of effective lead content
Table 4-sample A under not homostasis improvement time to soil remediation after the measurement result of effective lead content
As can be seen from the test result of above-mentioned table 1-4, after adopting the composite fertilizer of remediating lead-contaminated soil of the present invention to repair Pb contaminated soil, in soil, effective Pb reduced rate is all positioned at more than 80%, thus illustrate that composite fertilizer of the present invention can realize effective passivation of heavy metal in soil Pb and fixing and adopt modifying agent described in comparative example (see table 1) to repair effective Pb reduced rate in rear soil to soil to be only 55.04%, to illustrate that the repairing effect of modifying agent of the prior art to lead pollution of soil is unsatisfactory.
Further, in order to study in soil Pb content to the impact of crop growth, in blank soil, add heavy metal Pb makes Pb content in soil be respectively 0, 5, 10, 25, 50mg/kg, for often organizing Pb content, control group and experimental group are set respectively, wherein, do not add the soil of composite fertilizer of the present invention (sample A) as a control group, soil after adopting sample A to repair is as experimental group, respectively in the culturing on soil Plantula Brassicae chinensis of above-mentioned experimental group and control group, adopt the biomass of weighting method after dried difference experiment with computing group and control group, calculate biomass increment rate further, adopt atomic absorption spectrophotometer to measure Pb content in Plantula Brassicae chinensis, result is as shown in table 5.
The table 5-impact that soil absorbs Growth of Cabbage and Pb after composite fertilizer repairs
Test result as can be seen from above-mentioned table 5, in Plantula Brassicae chinensis, the detected result of Pb content shows, compared with control group, when the initial addition of P in soil b is respectively 5mg/kg, 10mg/kg, during 25mg/kg and 50mg/kg, after composite fertilizer of the present invention repairs, biomass increment rate is respectively 56.1%, 65.4%, 13.2% and 14.1%, illustrate that described composite fertilizer effectively can promote the growth of Plantula Brassicae chinensis, in Plantula Brassicae chinensis, Pb content reduces by 28.1% respectively, 41.12%, 38.1% and 31.15%, illustrate that composite fertilizer of the present invention can make the active significantly reduction of the lead in soil, reduce farm crop to the absorption of lead, lead content in farm crop is significantly reduced.Even if for the soil (initial p b content is 0mg/kg) not by Lead contamination, use after composite fertilizer of the present invention repairs, biomass increment rate is up to 71.4%, illustrate that described composite fertilizer effectively can promote the growth of Plantula Brassicae chinensis, also make Pb content in Plantula Brassicae chinensis reduce by 8.3% simultaneously.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (10)
1. a composite fertilizer for remediating lead-contaminated soil, is characterized in that, raw material composition comprises:
Nitrogenous fertilizer, 10-60 weight part;
Phosphate fertilizer, 10-60 weight part;
Potash fertilizer, 10-60 weight part;
Arsenic determination, 0.5-2 weight part;
Catalyzer gives up agent, 2-10 weight part;
Chitosan, 10-40 weight part;
Humic acid breeze, 25-55 weight part;
Sepiolite, 15-25 weight part;
Plant ash, 3-11 weight part;
Kaolin, 0.5-1.1 weight part;
Zeolite, 0.3-1.2 weight part.
2. the composite fertilizer of remediating lead-contaminated soil according to claim 1, is characterized in that, the give up active ingredient of agent of described catalyzer is cupric oxide and zinc oxide.
3. the composite fertilizer of remediating lead-contaminated soil according to claim 1 and 2, is characterized in that, the agent of giving up of described catalyzer is be that the catalst for synthesis of methanol of carrier gives up agent with aluminum oxide.
4. the composite fertilizer of the remediating lead-contaminated soil according to any one of claim 1-3, is characterized in that, the give up particle diameter of agent of described catalyzer is less than or equal to 10nm.
5. the composite fertilizer of the remediating lead-contaminated soil according to any one of claim 1-4, it is characterized in that, described nitrogenous fertilizer is the mixture of one or more in urea, volatile salt, ammonium sulfate, ammonium chloride, nitrocalcite and ammonium nitrate, described phosphate fertilizer is the mixture of one or more in monoammonium phosphate, diammonium phosphate, calcium superphosphate, double superhosphate and fused(calcium magnesium)phosphate, and described potash fertilizer is the mixture of one or more in Repone K, potassium sulfate, potassium silicate and saltpetre.
6. the composite fertilizer of the remediating lead-contaminated soil according to any one of claim 1-5, it is characterized in that, the particle diameter of described chitosan is 110-140 order, the particle diameter of described humic acid breeze is 110-140 order, the particle diameter of described sepiolite is 110-140 order, the particle diameter of described plant ash is 110-140 order, and described kaolinic particle diameter is 110-140 order, and the particle diameter of described zeolite is 110-140 order.
7. the composite fertilizer of the remediating lead-contaminated soil according to any one of claim 1-6, is characterized in that, is also added with at least one in unslaked lime, wilkinite, hydroxyapatite and fertilizer;
In described fertilizer, to dry quality of organic matter mark >=40% of base; To dry massfraction >=4.0% of the nitrogen of base, Vanadium Pentoxide in FLAKES and potassium oxide total nutrient; Massfraction≤30% of the moisture of fresh sample, potential of hydrogen pH value is 5.5-8.5.
8. the preparation method of the composite fertilizer of the remediating lead-contaminated soil according to any one of claim 1-7, its step is as follows:
Get various feed composition according to above-mentioned weight part and mix, namely obtaining described composite fertilizer through extruder grain.
9. the application of composite fertilizer in lead pollution of soil is repaired of the remediating lead-contaminated soil described in any one of claim 1-7.
10. the application process of the composite fertilizer of the remediating lead-contaminated soil described in any one of claim 1-7, its step is as follows:
In the soil of Lead contamination, add the composite fertilizer of described remediating lead-contaminated soil, addition is 10-200kg/hm
2, the balance improvement soil time is 7-14 days.
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| CN106010562A (en) * | 2016-06-12 | 2016-10-12 | 湖南永清环保研究院有限责任公司 | Farmland soil heavy metal passivator and application thereof |
| CN106552579A (en) * | 2017-01-07 | 2017-04-05 | 北京源清益壤环保科技有限公司 | For removing modified kaolin adsorbent of lead in polluted-water and preparation method thereof |
| CN107935774A (en) * | 2017-12-07 | 2018-04-20 | 鲁忠华 | A kind of compound fertilizer of remediating lead-contaminated soil and preparation method thereof |
| CN108586138A (en) * | 2018-05-24 | 2018-09-28 | 合肥卓畅农业科技有限公司 | A kind of heavy-metal contaminated soil conditioner and preparation method thereof |
| CN112170475A (en) * | 2020-09-08 | 2021-01-05 | 吉林省林业科学研究院 | Heavy metal contaminated soil remediation agent and remediation method |
| CN113083850A (en) * | 2021-03-26 | 2021-07-09 | 维塔探索(广东)科技有限公司 | Composite biochar for preventing and treating heavy metal pollution and preparation method thereof |
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Application publication date: 20151209 |